4311 4315.output

* GB784718 (A)

Description: GB784718 (A) ? 1957-10-16

A new or improved spare-wheel carrier for motor road vehicles

Description of GB784718 (A)

PATENT SPECIFICATION Date of filing Complete Specification Oct 27, 1955. Application Date Oct 27, 1954. 784,718 No 31019/54. Complete Specification Published Oct 16, 1957. Index at Acceptance: -Class 136 ( 1), 5 ( 3: 4). International Classification: -B 62 h. COMPLETE SPECIFICATION A new or improved Spare-Wheel Carrier for Motor Road Vehicles We, MAURICE FREDERICK CROWE, a British Subject, of 35, Merton Gardens, Petts Wood, Kent, and DENYS MARTIN CALLOW, a British Subject, of 4, Briardale, Wimbledon Park Road, London, S W 19, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: - This invention relates to a new or improved spare wheel carrier for motor road vehicles, and has for its object to provide a convenient means for mounting the spare wheel beneath the usual luggage boot of a motor car or any equivalent compartment or floor portion of a motor road vehicle and to allow the wheel to be thus mounted and removed easily and conveniently as compared with the difficulty that would be experienced in carrying out these operation if normal mounting methods were used to secure the wheel in such position. Present day practice is to house the spare wheel in the luggage boot; this encroaches on the luggage space available in the boot In certain other cases the spare wheel is bolted on the outside of the back of the vehicle body, but this detracts from the appearance of the body even if the wheel is housed in a casing, and is impracticable if an externally-accessible luggage boot is to be provided The present invention overcomes these drawbacks and enables the wheel to be

carried in an obscured position whilst neverthless being easily accessible and removable for use when required, the wheel being enclosed for protection in its mounted position. According to the invention a spare wheel carrier for motor road vehicles comprises a wheel-holding element hingedly mounted beneath a luggage boot or any equivalent floor portion of a vehicle, or equipped with means to enable it to be so mounted, whereby said element can take up a closed position with the said elemcnt or the wvheel against the underface of said beet or like floor, and can be swung down for removal of the wheel, said element having associated with it at a position opposite the hinge, fastening and retaining means l P ' I whereby said element can be secured in its closed position, said means including in association with a part which passes through said floor an operable part disposed or adapted to be disposed above the floor and which must be operated to establish a condition which allows release of the said element to be carried out subsequently at a position beneath said floor, said means affording support for said element after such condition is established and prior to such release, the release being effected by manipulating said means in a required manner. Conveniently the aforesaid fastening and retaining means may be a supporting member which passes up through the said floor and has a locating portion which is imprisoned to prevent deflection of said member when said element is in its secured position, said supporting member or at least the locating portion thereof being adapted to take up a lowered position when said operable part is actuated, said supporting member or portion being then capable of deflection to release the wheel-holding element The wheel-holding element may have an arch or downwardly-facing recess in which the said locating portion of the supporting member is imprisoned when said wheel-holding element is in its secured position, said locating portion affording support for said element. The supporting member may comprise a bolt or equivalent screw-threaded member, the screw thread of which permits at least the said locating portion to descend The hinge mounting for the wheel-holding element may comprise a bolt hingedly engaged or engageable with or hingedly connected to said element, said bolt passing through the said floor and taking support therefrom. As regards the bolt which serves as the supporting member, the deflection of this for release of the wheel-holding element may be an angular one permitted by the manner of mounting said bolt in the floor. A spare wheel carrier of convenient form in accordance with the invention will now be described by way of example and is shown in the

accompanying drawings, wherein: 784,718 Figure 1 is a longitudinal section through the boot of a motor car fitted with said wheel carrier; Figure 2 is an inverted plan view of the wheel-holding element of said wheel carrier. Figure 3 is an elevation of a fitting for enabling the wheel carrier to be hingedly mounted to the floor of the vehicle boot. Figure 4 is an elevation of a fitting serving as a fastening and retaining means for the wheel carrier, and Figure 5 is a fragmentary view of the lefthand side of the assembly seen in Figure 1, showing how the fastening and retaining means can be angularly displaced to release the wheel-holding element. The wheel carrier shown comprises a dished housing 1 having a flanged rim 2 to which is attached a resilient facing ring 3 This housing serves to receive a spare wheel 4 of a motor road vehicle and has a depth such that the inflated tyre 5 of said wheel bears against the floor 6 of the boot 7 of the vehicle when the device is fitted to said floor 6 as later herein described and the housing is being held in place with the facing ring 3 contacting said floor. A bar 8 permanently secured to the base of said dished housing 1 and extending diametrically across it has end portions 9,10 projecting from said housing to serve as lugs The lug 9 maintains a position substantially level with the base of the housing 1 and is arched as shown. The lug 10 is bent to extend up to about the level of the rim 2 of said housing and is then arched as shown to form a hook portion 11; this hook portion is formed with a longitudinal slot 12. For hingedly mounting the wheel carrier beneath the boot 7 there is provided a headed bolt 13 which is passed down through a hole in the floor 6, a cylindrical cross piece 14 being screwed on to said bolt; for this purpose said cross piece 14 is formed with a threaded transverse bore The hook portion 11 of the lug 10 is hooked over this cross piece 14 and thus becomes journalled thereon, the slot 12 accommodating the bolt 13 The bolt 13 is fitted with a clamping nut 15 and washers 16; the bolt is rotated, by turning its head, to bring the lug hook 11 to the proximity of the floor 6, the nut 15 then being tightened up beneath said floor to secure the bolt firmly to the latter It will be realised that the hinge mounting thus provided for the housing 1 enables same to be swung down (at the opposite side) from the closed position shown in Figure 1 to a position in which it slopes down to afford access for removing the wheel from the housing or replacing a wheel therein. For fastening the housing 1 in its closed position there is provided a bolt 17 having an eye-shaped head 18 which serves to receive the lug 9 of the wheel carrier The arch of this lug 9 serves for engaging over

the cross-bar portion of the bolt head 18 The bolt passes up through a hole in the floor 6, its shank portion above said flocor being fitted with a wing nut 19 and washer 20 70 It will be understood that when the bolt head 18 is in engagemrent with the lug 9 and the wing nut 19 is screwed up to press the housing 1 against the underside of the floor 6 The cross bar portion of the bolt head 18 75 is located by the arch of lug 9; this prevents the bolt 17 from being deflected aside to disengage it from lug 9 Thus the eye-shaped head 18 serves as a locating portion of bolt 17 The wing nut 19 cannot be operated except 80 by obtaining access to the interior of boot 7; this means that unauthorised persons cannot open the housing 1 to reach the wheel providing the boot is kept locked However, the owner of the car can readily open the housing 85 by slackening off the wing nut 19; this will allow the bolt to descend to a position where release of the lug 9 is subsequently possible from a position beneath the floor 6 For such release the bolt 17 is swung angularly aside 90 as shown in Figure 5, the housing 1 being slightly lifted to disengage the bolt head 18 from the arch of lug 9 The housing is thus free to be swvung down for removal of the wheel 4 The hole in floor 6 through which the 95 bolt 17 passes is sufficiently large to permit the required tilting of said bolt, this hole may be fitted with a bush (not shown). From the above description it will be realised that the slackening back of nut 19 100 establishes a condition which allows release of the housing 1 to be efected subsequently below the boot, the bolt 17 meanwhile continuing to afford support for the said housing. As a modification the bolt 17 could be 105 jointed intermediately in its length for angular displacement of the lower portion alone, the joint passing up into a sleeve fixed or adapted to be fixed to the floor 6 and extending downwardly therefrom so that movement about the 110 joint cannot take place in the normal uppermost position of the bolt. By reason the wheel tyre 5 being gripped between the floor 6 and the base of housing 1, the wheel becomes firmly held in place 115 As an alternative to the bolt 13 and screwed-on cross piece 14 a conventional T bolt could be used with its head lowermost, said bolt being drawn up by a nut screwed thereon As an alternative to the bolt 17 there 120 could be employed a bolt and screwed on cross piece as described with reference to bolt 13 and cross piece 14. The apparatus provided by the invention is suitable for fitment to e:isting motor cars as 125 well as being applicable to new vehicles in the production of same When installing the device, the holes formed through the boot or like floor need not be precisely disposed; they can be at approximately the correct distance 130 784,718 apart, the hinge bolt and fastener being capable of adapting themselves by slight

angular variations to the spacing of said holes.

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* GB784719 (A)

Description: GB784719 (A) ? 1957-10-16

Improvements in or relating to the formation of pleats in textile fabrics


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BE545401 (A) CH330097 (A) FR1141725 (A) US2923047 (A) BE545401 (A) CH330097 (A) FR1141725 (A) US2923047 (A) less Translate this text into Tooltip

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The EPO does not accept any responsibility for the accuracy of data and information originating from other authorities than the EPO; in particular, the EPO does not guarantee that they are complete, up-to-date or fit for specific purposes.

PATENT SPECI(ATION Date of filing Complete Specification Feb 21, 1956. Application Date Feb 22, 1955. 7849719 No 5194/55. Complete Specification Published Oct 16, 1957. Index at Acceptance: -Class 141, K 2. International Classification: -D 06 j.

COMPLETE SPECIFICATION Improvements in or relating to the Formation of Pleats in Textile Fabrics I, PERCY FIELD CROSLAND, of Bridge Hall Dyeworks, Bury, County of Lancaster, a British subject, do hereby declare the inveninvention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to the pleating of textile fabrics. The art of mechanically pleating textile fabrics is well known and the effects produced can be divided in respect of their shape, into two main classes. In the first the pleats or folds are produced by a reciprocating blade which folds the fabric into layers which are characterised by the fact that one layer of the fabric is always tucked over or under the next layer, such pleats being usually known as flat pleats. In the second type the pleats are not tucked one under the other, but are zig-zag or sinuous in form Folds or pleats of this type on textile fabrics are often referred to as accordion pleats One way of producing such pleats or folds is to pass the material which may have been impregnated with a stiffening substance, between two heated contacting corrugated rollers driven at the same circumferential speed and which have their axes parallel. Pleats or folds produced by both the above well known methods have in common that the folds or pleats are substantially parallel and lie substantially at right angles to the selvedges or edges of the fabric. It is often desired, however, that the pleats or corrugations shall not have this substantially parallel form, but shall diverge and tak-e a shape which roughly approximates to the appearance of a flat section of a many spoked wheel Pleats of this description are often termed " Sun-ray " pleats. The present invention relates to the formation of such-ray pleats in individual pieces of textile fabric of approximately triangular shape with the apex removed, and it consists essentially in passing the pieces between an engaged lPrice 3 s 6 d l pair of heated conical rollers of similar shape and dimensions which are driven at the same number of revolutions per minute, these rollers being engraved with like, straight and regular grooves which gradually and regularly diminish in width and in depth from the ends having the greater diameter to the ends having the smaller, the engagement of the rollers being such that the ridges which occur between the grooves of one roller fit into the grooves of the other roller and the pair of rollers so engaged run smoothly together without vibration. By this arrangement the lineal speed of the fabric passing between the rollers varies along their lengths, being proportional at any point to

the diameter of the rollers at that point. If the fabric is cellulosic in nature, and is impregnated with a suitable solution containing materials which can produce thermosetting resins and is dried prior to its passage between the pleating rollers, then, if it is further heated after the passage without distortion of the formed pleats, the condensation of the resin is completed and the final effect is of a fabric having durable sun-ray pleats. If the fabric itself is of a thermoplastic nature and can be deformed by heat, then without prior impregnation the passage of the fabric between the pair of engraved conical rollers running together under pressure and heated to the appropriate temperature will produce effects of high durability. In order that the invention may be clearly understood reference will now be made to the accompanying drawings In these drawings: Fig 1 is a diagrammatic view of a pair of grooved conical rollers arranged with their axes inclined to one another through which the pieces of fabric are passed, (in this fig the grooves in the rollers are not shown), Fig 2 is an end view of the large end of one of the rollers showing the grooves and ridges formed therein; Fig 3 is a section on line 3-3 of the roller A of Fig 1; Fig 4 is a section on line 3-3 of the roller 784,719 A of Fig 1; (Figs 2, 3 and 4 are drawn to a larger scale than Fig 1) and Fig 5 is a face view of a piece of fabric after treatment by the rollers. As shown in Fig 1 two identical conical rollers A and B are pressed together and driven at the same numbers of revolutions per minute. As shown in Figs 2, 3 and 4, the roller A is formed with straight regular grooves a' and intervening ridges a, the grooves being deepest and widest at the large end of the roller and gradually becoming shallower and narrower as they approach the small end of the roller, preferably disappearing just before the small end of the roller is reached. Although only the roller A is shown in Figs 2, 3 and 4, it is to be understood that the roller B is of corresponding construction so that the ridges of one roller will fit into the grooves of the other roller, and when driven in close contact the rollers will run smoothly and without vibration. Fig 5 illustrates a finished piece of fabric C with the pleats or folds d formed therein. I am aware that it has been proposed to form paclking rings from a long strip of material by continuously passing the strip between a pair of intermeshing fluted conical rollers, the depth of the flutes decreasing from the smaller end of the rollers to the larger ends thereof so that the corrugations formed in the edge of the strip passing between the rollers near the smaller ends are deepest and

consequently the edge is shortened and the strip can be wound into a frusto-conical package.


* GB784720 (A)

Description: GB784720 (A) ? 1957-10-16

Improvements in cycle stands


PATENT SPECIFICATION Inventors: GORDON INGLESBY FRANCIS and WILLIAM ARTHUR KING 784,720 Date of filing Complete Specification March 16, 1956. Application Date March 19, 1955 No 8051/55. Complete Specification Published Oct 16, 1957. Index at Acceptance:-Class 136 ( 1), J 2 (A 1 B: B 3)o International Classification: -B 62 j. COMPLETE SPECIFICATION Improvements in Cycle Stands We, FRANCIS & BARNETT LIMITED, a British company, of Lower Ford Street, Coventry, in the County of Warwick, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:This invention relates to stands for cycles more particularly motor cycles wherein the stand is of the kind having one or two legs pivotally mounted or adapted to be so mounted at a central underpart of the machine between the wheels of the latter. With such stands of the usual twin-legged or bi-pod type on a motor cycle it is well known that considerable effort is necessary to pull the machine to the raised position on its stand to cause the latter to

have an over centre action about its pivotal mounting and the object of the present invention is to provide a stand which can be readily lowered and operated to support or raise the machine with the minimum of effort A further object of the invention is to provide a dual purpose twin legged stand capable of either propping the machine so that it is self-supporting whilst on its wheels or raising the machine whereby one wheel is lifted from the ground. According to this invention a stand of the kind referred to pivotally mounted or adapted to be pivotally mounted on a cycle is characterised by the pivot of the stand leg or legs being movable or adapted to be movable relative to a cycle on which it is mounted and operating means operable to lower said pivot in relation to the cycle in order to increase the effective height of the stand for raising the cycle when the stand leg or legs has or have been swung to the lowered supporting position. In order that the invention may be clearly understood and readily carried into practical effect, reference is made in the following description to the accompanying drawings, in which: Figure 1 is a side elevation of a twin legged stand according to this invention shown lPrice 3 s 6 d l mounted on a motor cycle and in the fully raised position; Figure 2 is a plan view of the stand shown in Figure 1 and partly in section to reveal construction, and Figures 3 and 4 are views similar to Figure 1 showing the stand legs in the lowered positions. In applying the invention to a twin legged motor cycle stand of the kind referred to and as shown in the drawings a fixed mounting 1 is provided on the central under part of the cycle frame or engine (of which the gear box is shown at 3) The mounting 1 may take the form of a pressing or pair of parallel spaced plates 4 bolted or otherwise secured to the frame or engine or integral with either of the latter In the drawings the plates 4 are shown bolted to the rear engine support 5. The mounting 1 is provided with a slot or guideway 6 by means of which the pivot 7 of the stand legs 9 is able to have movement relative to the mounting 1 and hence the machine whereby the effective height of the stand can be altered The arrangement of the slot or guideway 6 is generally vertical and as shown is such that it corresponds with the over centre inclined lowered position of the stand legs 9 (Figures 3 and 4) to allow longitudinal movement of the latter in said position. In the case of the pair of spaced plates 4 shown each plate is provided with a substantially vertical slot or a slot 6 slightly inclined from the vertical in the above mentioned manner, the said slots 6 being in register. In order to furnish a pivot 7 for the stand legs 9 that is movable in

the slots 6 of the mounting plates 4, a transverse tube 10 is provided which is journalled for rotary and sliding movement in and along said slots 6, extensions or lugs 11 at the upper end of the stand legs 9 being carried on said tube 10 for pivotal movement thereabout. In accordance with the usual practice of stands of this kind the stand legs 9 are spring loaded so as to have an over centre action about their pivot 7 The spring loading means 784,720 may be of any convenient or Iknown Idnd such as a tension spring 12 connected at one end to a stand leg 9 and at the other end to an anchorage 13 associated with the stand mounting 1 on thile machine, the spring s-ingn across the pivotal axis of the stand legs 9 as the latter are raised or lowered so that a snap action to either position is obtained. In order to alter the position of the pivot 7 of the stand to vary its effective height there is provided in accordance with this invention operating means which may take the form of a lever 15 fast with a shaft 16 (such as a cranked integral extension of the lever 15), which shaft 16 is journalled within the tube and carries rotationally fast therewith a pair of rounded extensions or cams 17, spaced apart by said tube 10 Each cam 17 cooperates with a fixed surface such as the underside of an outwardly directed flange 19 of a corresponding mounting plate 4 Duplication of the cam mechanism in this way provides a balanced action but an arrangement ufilising a suitable single cam and surface may be employed if desired. When tile stand is initially lowered in the usual manner with the before mentioned snap action for propping or steadying the machine (Figure 3) the lever 15 remains in an inol Perative substantially horizontal position with the tube 10 and shaft 16 at the upper end of the slots 6 in the mounting plates 4 for bearing that part of the weight of the machine that is carried by the stand in this position. In order to further raise the machine such as to lift the rear wheel 2 thereof clear of the ground the lever 15 is swung down such as by foot operation of the pedal portion 20 to a position substantially alongside an adjacent leg 9 of the stand or thereabouts This movement of the lever rotates the cams 17 for co-action with their co-operating bearing surfaces,at the underside of the flanges 19 on the mounting plates 4 whereby the tube 10 and shaft 16 are forced to the lower end of the slots 6 which has the effect of lowerinwr the pivot 7 of the stand relative to the machine or in other words increasing the height of the stand so that the machine is raised (see Figure 4) In this raised position the supported weight of the machine is borne by the abutment of the cams 17 with the co-operating flanges 19 therefor on the mountina plates 4 in which position the cams 17 have moved over centre and are checked against further movement by abutment means such

as the contact of the lever 15 or lug 21 thereon against the adjacent leg 9 of the stand. The lever 15 may be duplicated at each side of the machine if desired but in the example shown the free end of the shaft 16 from the shoulder 18 receives a nut 14 (Figure 2) for retaining the cams 17 and tube 10 assembled thereon The lever 15 and integral shaft 16 are shown produced from hexagonal bar and engages holes of complementary form in the cams 17 so that the latter are rotationally fast ith the shaft 16 The shaft 16 may be of other suitable non-circular section as convenient 70 When the stand legs 9 are lowered it is necessary for them to be checked at the lovered position after over-centre movement under the action of its loading s'rin 12 and for this purpose an abutment on the stand 75 legs 9 such as inwardly directed flanges 22 on the lugs 11 are arranged to abut the rear edges 23 of the mounting plates 4 The said rear edges 23 are extended downwardly and parallel with the slots 6 in the plates 4 for a 80 sufficient extent to ensure that the said abutment is maintained when th'e pivot 7 of the stand is forced to the lower ends of the slots 6 as the macdline is fully raised by operation of the lever 15 85 The stand legs 9 and lever 15 may be held in their raised position solely by the action of the spring 12 loading the stand legs or as shoiwn an additional spring such as a tension spring 24 or a plurality thereof may urge the 90 tube 10 towards the upper end of the slots 6. The spring 24 is shown anchored between the tube 10 and a support 25 for the rear mudguard 26 The complete stand legs and lever assembly are held agains an abutment in their 95 raised position by the springs 12, 24 such as a stop 27 shown pressed out from one of the mounting plates 4 or each thereof against which the cam 17 associated therewith abuts in said raised position 100 In order to avoid undue extension of the tension spring 12 loading the stand legs 9 for their over centre movement the anchorage 13 for the spring 12 is shown orovided on a plate 29 or the like that moves do-vn wvith the tube 105 and shaft 16 as the latter are forced to the lower position by the cam co-action Such a plate 29 providing the movable anchorage 13 is shown pivotally engaged about the shaft 16 (e.g at th spacing washer 30 Figure 2) and 110 is slidable on an adjacent mounting plate 4 by pin and slot engagement in the direction of sliding movement of the pivot 7 For this purpose the plate 29 is provided with a slot 31 which in this instance is slidable about a foot 115 rest mounting stud 32. Alternatively, the plate 29 may be pivotally mounted on the adjacent mounting plate 4 for angular movement with the shaft 16 as the latter and the tube 10 are slid to the lower 120 end of the slots 6 In this case a slotted or like pivotal mounting or engagement of the plate 29 about the shaft 16 is necessary for relative sliding movement in order

to accommodate such angular motion of the plate 29 125 with the linear movement of the shaft 16 By allow 7 ing the anchorage 13 to move with the pivot 7 effort in moving the lever 15 is not employed in unnecessarily stretching the spring 12 130 784,720 In order to allow angular movement of the spring 12 with the legs 9 when the latter are swung down a cranked link 33 between the spring 12 and anchorage 13 is employed and so arranged to clear the shaft 16. It is to be understood that the invention herein described is applicable to single legged prop stands for the purpose of altering the length of the latter to suit varying conditions of road camber or uneven ground.


* GB784721 (A)

Description: GB784721 (A) ? 1957-10-16

Improvements relating to door bells


PATENT SPECIFICATION Inventor: FRANK WILSON Date of filing Complete Specification June 25, 1956. Application Date March 23, 1955. Complete Specification Published Oct 16, 1957. Index at Acceptance: -Class 13, All. International Classification: -G 08 f. COMPLETE SPECIFICATION Improvements, relating to Door Bells We, 'EVERED AND COMPANY LIMITED, of Surrey Works, Smethwick, in the County of Stafford, a British company, do hereby declare the invention for which we pray that a

patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:This invention relates to door bells and more particularly is concerned with door bells of the kind or type incorporating a bell or domed gong-like component carried by a spindle which is revolvably mounted on a base plate adapted for fixing on the door, the rotation of the said spindle, hereinafter referred to as the centre spindle, being controlled through the medium of a flat spiral spring one end of which is attached to the spindle while its other end is anchored to a post provided on the base plate, the said spring hereinafter referred to as the main spring, being wound up for putting it under tension, by manually turning the bell or domed gong-like device carried by the centre spindle in a clockwise direction, the winding and unwinding of the main spring being controlled through the medium of a gear train assembled on the base plate and comprising inter aia a ratchet toothed escapement wheel which coacts in a manner well understood with an arm or member adapted for oscillation on a spindle provided on the base plate, the said oscillating member carrying at its free end the clapper or hammer whereby the striking of thie bell or gong is effected. The said oscillating member is retained in a position in which it is urevented from oscillation until the bell is to be rune, by the provision in association with the said member of a spring loaded spindle which passes through the fixed base member and through the door its outer end being furnished in known manner with a press button by operation on which the spindle can be inwardly Dressed to a sufficient extent to remove a projection thereon from the obstructing position which it normally occupies relative to the oscillating member. lPrice 3 s 6 d l When in the normal condition of the parts of the mechanism the oscillating member is restrained from operating to ring the bell a pawl on its pivoted end so co-acts with the ratchet toothed escapement wheel of the gear train aforesaid as to prevent any rotation of the said wheel and thereby any such operation of the gear train as would allow the centre spindle to turn, under the action of the main spring, in an anti-clockwise direction, but when the oscillating member is free to oscillate to effect the ringing of the bell the ratchet ttoothed escapement wheel is permitted to turn and the gear train operates to effect the turning of the centre spindle and the gong carried thereby in an anti-clockwise direction. It will be appreciated that by the repeated ringing operations performed by the bell in use, the main spring will eventually expend all the energy stored therein by the winding up operation of the bell which will then cease to function until the main spring has been

rewound by the manual turning of the bell or gong device and the centre spindle whereon it is mounted. There is however in bells of this type as ordinarily constructed no visible indication that a re-winding operation is necessary since the bell has the same external appearance when the main spring is completely unwound as when it is fully wound up, the only indication of the unwound condition being 'the failure of the bell to ring, and hence the bell may remain out of action for some time without the re-winding necessary to permit it to resume its functions, being effected. The present invention has for its object to overcome this disadvantage in door bells of the tvype concerned as ordinarily constructed and the invention resides in the provision in combination with the mechanism of bells of this type, of an indicator which is normally concealed from view by the bell or dome-like gong component and which, when the main spring of the mechanism, due to the repeated ringing of the bell reaches or closely 784,72 1 No 8387/55. 2 784,721 approaches the stage at which the re-winding of said spring becomes necessary or desirable, is positively and automatically brought from the concealed position which it normally occupies when the bell is wound up, into a position in which the indicator is clearly visible. The invention will be further and more particularly described with reference to the accompanying drawings which illustrate its application to a conventional type or construction of manually operated bell in common use on the doors of domestic dwellings. Figure 1 shows the bell in plan, the parts incorporated in the mechanism for the pressbutton operation of the bell and which ordinarily projects from the rear of the base plate and extend through the door being omitted from the said figure. Figure 2 is a front elevation of the bell showing the bell or gong component thereof partly broken away to disclose the mechanism ordinarily concealed thereby, the main spring being shown in this figure in its wound up condition. Figure 3 is a similar view to Figure 2, the main spring being shown in the unwound condition which it gradually assumes owing to the ringing of the bell. Figure 4 represents, detached in side elevation, the arm or lever-like member associated with the indicator disc for its pivotal mounting on the base plate. Figures 5 and 6 represent in side and front elevations respectively a modified and preferred construction of the lever-like member associated with the indicator plate. The same numerals of reference indicate the same parts in the several

figures of the drawing, wherein the reference 7 denotes the base plate whereon the mechanism incorporated in the bell is assembled and 8 denotes the bell or gong component, the said gong component not only constituting a cover for the mechanism but also serving for the winding up of the main spring, denoted by the reference 9, in the manner well understood. The base plate 7 is furnished as usual on its inner or front face with three posts disposed at right angles to the face of the plate and at equal radial distances from the centre thereof as seen in Figures 2 and 3 in which the front ends of the posts are marked 10, 11 and 12, the said posts serving to support a plate 13 of triangular formation having therein perforations to receive the upper ends of the posts and also to afford a bearing 13 Y for the revolvable centre spindle denoted by the reference 14, and other spindles incorporated as usual in the mechanism of the bell. The revolvable centre spindle 14 has at its inner or rear end a bearing in the fixed base plate and its outer end passes through and has a bearing in the triangular plate 13 which is located on the upper or outer ends of the fixed posts and is retained in position thereon by a spring wire clip 15 as usual. The outer end of the revolvable centre spindle 14 is furnished with a screw thread for the screwing thereon of the bell or gong 70 when the parts of the mechanism have been properly assembled on the base plate. The revolvable centre spindle carries at its inner end the main toothed wheel 16 of the driving gear chain, and the main spring 9 is 75 disposed as usual between the said toothed wheel and the triangular plate aforesaid arranged on the upper ends of the posts, one end of the sprine being anchored on the said centre spindle and its other end being anchored 80 in like manner to one of the three fixed posts. As is well understood when the main coil spring is wound up the diameter of its outer periphery is considerably less than its diameter when run down and according to the present 85 invention advantage is taken of the expansion of the main spring, which takes place during running down of the bell in the ordinary use of the same, to effect the automatic operation of the indicator incorporated in the device in 90 accordance with this invention. The said indicator is constituted bv a flat thin plate or disc of metal or a suitable plastic which is adapted for a swivel mounting on one of the fixed posts aforesaid on the base plate 95 The said indicator plate or disc, which is denoted by the reference 17, is disposed at the inner or front face of the base plate and has in association therewith and is carried by an arm or lever-like member, denoted generally 100 by the reference 18, which provides for its pivotal mounting on one of the fixed posts conveniently the post

marked 10, the said arm or lever-like member being adapted to bear on the outer periphery of the main spring 105 9 and serving to retain the indicator vlate or disc in a position in which it is concealed by the bell or dome-like gong component, the said arm or lever-like member operating under the action thereon of the main spring as it uncoils 110 and loses its tension, in the performance of ringing operations by the bell, to effect the turning of the indicator plate or disc to such position that it projects outwardly through the gap 20 which ordinarily obtains between the 115 inner edge of the bell or dome-like gong and the presented face of the base plate, thereby affording a visible indication of the necessity for the re-winding of the main spring. The lever-like arm or member 18 provided 120 in association with the indicator disc 17 for its pivotal mounting on the base plate and whereby the said plate is retained in its concealed position in the operation of the bell may, as is illustrated in Figures 2, 3 and 4, be construc 125 ted from a piece of spring strip metal which is furnished at one end thereof with a part 18. of tubular formation to provide for its pivotal mounting on the fixed post on the base plate. that marked 10 in the drawing 130 784,721 The said spring strip metal arm is formed intermediate its ends with a curved portion 18 ' which projects radially inwards and bears on the outer periphery of the main spring 9 and the arm is maintained in contact with the main spring by a light coil tension spring 19 one end of which has a hooked connection with the end of the lever-like arm, its other end being anchored to one of the fixed posts, that marked 11 in the drawing. It will be appreciated that as the main spring uncoils when running down in the ringing operations performed by the bell, its action on the lever-like arm 18 effects the turning thereof in the direction for bringing the indicator plate 17 outwardly through the gap 20 between the peripheral edge of the gong in the presented face of the base plate, the indicator plate being thereby brought from the concealed position to the position in which it is shown in Figure 3 thus affording visible indication that the bell should be re-wound. During the re-winding operation on the bell the light tension spring 19 returns to its normal or reinstated condition and in so doing effects the turning of the lever arm 18 in the direction for returning the indicator plate carried thereby to the position in which it is concealed by the gong. In a modified construction of the lever-like member which carries the indicator plate 17 the said lever-like member may as is shown in Figures 5 and 6 be fabricated from a piece of spring wire which is so bent as to afford two arms or branches marked 18 c and 18 %, and two

spring coils 18 e and 18 f in conjunction respectively with the said arms, the said coils being in axial alignment and of appropriate diameter for taking and turning on the post 10 whereon the lever-like member is pivoted. The arm 18 C carries the indicator plate 17 while the arm 185 which terminates in a short arm 18 g adapted for an anchorage on the plate 13 is so bent radially inwards as to contact, when the parts are assembled, with the outer periphery of the main spring. The outward turning motion of the indicator plate is effected as in the first described construction, by the action on the lever arm of the main spring 9 as it expands into the unwound condition and the coils 18 e and 18 f operate in the manner of coil springs to return the indicator into the concealed postion as the main spring is rewound. This construction of the lever-like member 55 avoids the necessity of the incorporation of the light coil spring 19 aforesaid. The indicator plate will be marlked with the instruction word "Re-wind" or other instruction may be placed on the said plate 60 It will also be appreciated that indicators in accordance with the present invention may, if desired, be readily applied to existing door bells of the type with which the invention is concerned 65


* GB784722 (A)

Description: GB784722 (A) ? 1957-10-16

Improvements relating to bushings


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PATENT SPECIFICATION 78,4722 {I Date of Application and filing Complete Specification: May 9, 1955. No 13363/55. Application made in United States of America on May 11, 1954. Complete Specification Published: Oct 16, 1957. Index at acceptance:-Classes 36, DIA; 83 ( 2), A 115; 89 ( 1), A( 2 83: 3); and 99 ( 1), G 9 F. International Classification:-B 23 p F 06 b, 1 H 02 g. COMPLETE SPECIFICATION Improvements relating to Bushings We, AMERICAN FLANGE & MANUFACTURING Co, INC, of 30, Rockefeller Plaza, New York 20, United States of America, a Corporation of the State of Delaware, United States of America, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: - This invention relates to bushings and more specifically to the structure and method of manufacture of an improved internally threaded bushing or connector intended particularly, but not exclusively, for the attachment of a conduit to an electrical junction box or a switch box, for example. Conduit bushings or connectors of the type referred to above are usually threadably engaged with the end of a conduit to cover or guard the raw end thereof to protect the insulation on the wiring as well as to secure the conduit to a wall of a metal junction box, switch box or other electrical fixture Because of the nature of devices of this character, cost is an essential factor and the fittings are therefore generally cast or forged into their final shape and are not subjected to normal metal finishing operations As a result many bushings of this type have imperfections or irregularities about the edges thereof

which can injure the insulation on the electrical wires extending therethrough. Accordingly, it is an object of this invention to provide an improved bushing or fitting wherein a smooth uninterrupted edge is provided to guard and protect electrical wiring from being scuffed or torn by the raw edges of a conduit. According to the invention, a bushing comprises a cylindrical body part having a threaded internal wall, a curled edge on one end of said bushing formed inwardly thereof, overlapping part of the threads on the internal wall and terminating in an end face fac43 ing said threads, and tool-engaging lug means on the outer surface of said body part. lPrice 3 s 6 d) Another object of the invention is to provide a low cost conduit bushing that may be more accurately and firmly seated in place on the conduit and at the same time with 50 stand the severe impacts normally required to lock it in position To this end the bushing may be fabricated of heavy gauge sheet steel with deep seated accurately placed threads extending throughout the length of the bush 55 ing so that the end of the conduit is completely and effectively guarded. Further according to the invention, the method of fabricating a bushing of sheet steel comprises forming an opening in said 60 sheet, shaping the material about said opening into a cylindrical body extending from and integrally connected with the sheet, removing said formed body part from the remainder of the sheet by shearing said sheet 65 to leave lug parts extending outwardly from the body, reaming one end of the body part to provide a section of reduced wall thickness, threading the internal wall of said body and then curling the section of reduced 7 o thickness inwardly of the body to meet said threads. An embodiment of the invention will now be more fully described by way of example and with reference to the accompanying 75 drawing, in which: Fig 1 is a plan view of a fitting in accordance with the invention; Fig 2 is a side elevation of the embodiment of Fig 1: S O Fig 3 is a cross sectional view of Fig 1 taken along the line 3-3 thereof; Fig 4 is a cross sectional view of Fig 1 taken along the line 4-4 thereof, and Fig 5 is an elevational view in partial sec 85 tion showing the cooperation of the fitting of Fig 1 with a conduit. Briefly, the bushing in accordance with the invention is fabricated of a relatively heavy gauge steel sheet stock which not only en 90 ables the formation of a bushing capable of withstanding the shock produced upon inPr 784,722 stallation, but also the production of a device having a smooth, precise, curled throat which overlies the end of the raw edge of the conduit and provides an opening which is completely

free of any sharp edges or any other imperfections that might scuff or even tear the insulation on wires as they are pulled through the conduit More specifically the conduits themselves are usually bent or 0 formed into the desired shape and actually secured in position before the wire is inserted Wthen this has been accomplished the insulated wires are then fed through the conduit During this feeding procedure it is difficult, if not impossible, to prevent the wires from forcibly contacting the entrance bushing and should the throat of the bushing be imperfect serious damage to the insulation may ensue Often even slight damage to the insulation may cause a short circuit within the conduit that may be difficult to locate and repair. The new and improved bushing 10 illustrated in the drawings resembles a circular nut having a cylindrical body part 12 and a plurality of lugs 14 disposed about one end thereof These lugs are preferably spaced apart about the body and formed integrally therewith and comprise the means for seating or tightening the nut in position on the end of the conduit Tightening of the nut is usually accomplished by driving a screwdriver, or punch seated against the side of a lug 14 by repeated blows of a hammer which places substantial strain on the lugs Since most prior devices are fabricated of a relatively brittle material this often results in fracturing of the bushing or severance of the lug completely from the body of the bushing With the present invention, however, the lugs and body are integrally formed of a sheet steel which produces a shock resistant structure that will not crack or chip easily. The outer end 15 of the body 12 is preferably of reduced thickness and rolled inwardly of the bushing on a radius that is sufficient to provide a curled throat part extending inwardly a distance slightly greater than the thickness of the conduit wall for which the bushing is designed The internal surface of the body is provided with a full depth precision thread 16 which extends from the open end of the bushing about which the lugs 14 are disposed to a point beneath the curled edge 15 as shown at 17 in Figures 3 and 4 In this way the threaded end of the conduit can be seated tightly against the curled edge 15 of the bushing, so there is no possibility whatever of contact between the insulated wires and the end of the conduit The process of manufacture is briefly as follows: The bushing 10 is fabricated from sheet steel by forming an opening in the sheet and shaping the material about the opening into the cylindrical body part 12 This body part 12 is removed from the sheet by a shearing action, leaving the lugs 14 extending from one end The other end 15 of the body part 12 is reamed to reduce its wall thickness and 70 the internal surface of the body part 12 below the reduced section is formed with the threads 16 The reduced section is then curled inwardly to meet the threads 16.

Figure 5 illustrates the installation of the 75 improved bushing 10 in an electrical junction, or switch box, 18 An electrical junction or switch box of this general type is usually formed of a relatively heavy gauge steel and is provided with one or more openings 80 19 for the attachment of conduits 20 To install the conduit in the opening 19 a flat nut 21 is first threaded over the end of the conduit, a distance somewhat greater than that required to insert the conduit through 85 the opening 19 and to attach the bushing 10. The bushing 10 is then threaded in place and locked on the end of the conduit by forcibly seating it in place in the manner previously described This will bring the end 22 of the 90 conduit 20 into firm engagement with the inside of the curled edge 15 of the bushing 10. It will be observed that this curl portion 15 actually extends slightly beyond the inner surface of the conduit and completely guards 95 the edge thereof With the bushing 10 tightly in place the nut 21 is then backed against the outside of the wall 181 of the box 18, which functions to draw the bushing 10 tight inside the wall 181 and thus hold the conduit se 100 curely in place within the opening 19. With the structure as described above the difficulties heretofore encountered with devices of this character have been overcome and a sturdier, more effective, bushing is pro 105 vided that will afford maximum protection for the wiring and materially reduce the possibility of short circuits. While only one embodiment of this invention has been shown and described, it will 110 be apparent that modifications, alterations and changes may be made therein without departing from the scope of the invention as defined in the appended claims.


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