THE "DAVON" OROPHONE
1
880 New Inventions. DENTAL HYPODERMIC SYRINGE. Messrs. Burroughs, Well come, and Co., Snow Hill Build- ings, London, E C., have made an improved pattern of their dental hypodermic syringe, which has been strengthened and simplified in some of its parts. The syringe shown in the illustration is made entirely of metal, is easily taken apart for cleaning and sterilising, and as easily put together again. No packing is required round the piston, which consists of a solid plain metal plunger, ground to fit the barrel accurately. The barrel, cap, nozzle, and needle attachment are locked together by a simple modified form of bayonet catch, which does away with screws, washerp, and other parts easily damaged or lost. The finger-grip can te fixed at any point on the barrel, and there is a screw on the plunger rod which regulates the amount of fluid injected. Unmounted needles are used, and the metal case in which the instrument is packed forms a sterilising tray. The qualities which the manufacturers claim for this syringe-namely, efficiency, durability, stability, and convenience-are well substantiated in actual use. THE "DAVON" OROPHONE. THIS electrical aid has a different tore to any other at present on the market. This in itself will make it of value to cases which can be aided by this class of instrument, as a certain proportion of patients will prefer it to any other design. It will not, however, suit such a wide range of deaf cases as some of the appliances already known to us. With this instrument, after the ear has been educated to it, the suitable A, Receiver. B, Transmitter. c, c’, Terminals of the trans- mitter into which the connecting plug D is inserted; these terminals are of different size, so that the plug can only be inserted in the right manner. D, Connecting plug to trans- mitter. E, Connecting plug to battery. patient will be able to pick up speech from a distance, as, although the instrument is not a loud one, the transmitter diaphragm is not " damped " in any manner. The buzzing present in so many " electrical aids " is abolished in the 0’ Orophone," which would serve as a preparatory instrument until a more powerful one could be used. The transmitter has no tab to fasten it on to the (lothing, or any means of being attached to the battery, so that the battery may be used as a pedestal or support. The receiver ear-cap is unnecessarily large for the size of the diaphragm used, and the diaphragm is not adjustable, while the battery is too large to be carried in the pocket. The flexible cords are good and well fastened off, so that the mechanical strain comes on the covering and not on the conductor; but the receiver cord is too lorg, and the method of fastening the cord on to the transmitter entails taking the transmitter to pieces to put on a new cord. The instrument may not prove very economical, because there is no switch in circuit to use when not listening to any sound, while the current consump- tion is not low. It has been tried on a number of cases and most patients could hear distinctly better with it than with- out it. The instrument is made by Messrs. F. Davidson and Co., 29, Great Portland-street, London, W. A NEW PORTABLE OPERATING TABLE. l THIS table, recently made to my design, consists through. out of finest seamless steel tubing, except the hinged joints, which are of solid brass, and the ratchets, which are of pressed steel. The table is absolutely rigid, very strong, and weighs a little over 30 lb. It can be unpacked, set out, and repacked in a few seconds. When closed it measures 39 X 21 X 3 in. (Fig. 1), when open it is 71 x 36 x 21 in. (Fig. 2), but it FIG 1. can be manu- factured anv less .. < heieht tban3ft. The head legs s giving a large ing the Tren- allied positions ; fitted with solid The illustrations closed and nrtfn- are slanted, base, and suit- delenburg and all the legs are rubber feet. ’ show the table with the loi3-- foot extension dropped, but it can be fixed in any of the positions required in modern surgery. Lithotomy up- rights and straps are provided, and an arm ’rest and instrument trays which simply catch on to the side of the table are added. The difficulty met with, even in opera- ting theatre tables, of over-extending the arm, as required in dissection of the axilla, has been met by a detachable rotatable bar to which the arm may be attached and held horizontally at any angle. In addition an upright bar can be fitted on to any of the legs, or at any ’point on the upper horizontal bars, on which may be hung a lamp, an infusion apparatus, and so on ; this also carries a candle-socket. All the tube joints are welded and rounded. The ratchets of the head and foot extensions are detachable and fitted with special sockets preventing any save intentional movements. The table is nickel-plated throughout, but can be enamelled if preferred. For travelling purposes a canvas bag, or a light tin case, or a wooden case, which becomes an instrument table if required, have been provided by the’ makers, Messrs. James Gibbons, of Wolverhampton. Wolverhampton. C. A. STIDSTON, M.D. Lomd, C. A. STIDSTON, M.D. Lond.
Transcript of THE "DAVON" OROPHONE
880
New Inventions.DENTAL HYPODERMIC SYRINGE.
Messrs. Burroughs, Well come, and Co., Snow Hill Build-ings, London, E C., have made an improved pattern of theirdental hypodermic syringe, which has been strengthened andsimplified in some of its parts. The syringe shown in theillustration is made entirely of metal, is easily taken apart forcleaning and sterilising, and as easily put together again.No packing is required round the piston, which consists of asolid plain metal plunger, ground to fit the barrel accurately.The barrel, cap, nozzle, and needle attachment are lockedtogether by a simple modified form of bayonet catch, which
does away with screws, washerp, and other parts easilydamaged or lost. The finger-grip can te fixed at any pointon the barrel, and there is a screw on the plunger rod whichregulates the amount of fluid injected. Unmounted needlesare used, and the metal case in which the instrument is packedforms a sterilising tray. The qualities which the manufacturersclaim for this syringe-namely, efficiency, durability, stability,and convenience-are well substantiated in actual use.
THE "DAVON" OROPHONE.
THIS electrical aid has a different tore to any other atpresent on the market. This in itself will make it of valueto cases which can be aided by this class of instrument, asa certain proportion of patients will prefer it to any otherdesign. It will not, however, suit such a wide range of deafcases as some of the appliances already known to us. With thisinstrument, after the ear has been educated to it, the suitable
A, Receiver. B, Transmitter. c, c’, Terminals of the trans-mitter into which the connecting plug D is inserted; theseterminals are of different size, so that the plug can only beinserted in the right manner. D, Connecting plug to trans-mitter. E, Connecting plug to battery.
patient will be able to pick up speech from a distance, as,although the instrument is not a loud one, the transmitterdiaphragm is not " damped " in any manner. The buzzingpresent in so many " electrical aids " is abolished in the
0’ Orophone," which would serve as a preparatory instrumentuntil a more powerful one could be used. The transmitterhas no tab to fasten it on to the (lothing, or any means ofbeing attached to the battery, so that the battery may beused as a pedestal or support. The receiver ear-cap is
unnecessarily large for the size of the diaphragm used, andthe diaphragm is not adjustable, while the battery is too
large to be carried in the pocket. The flexible cords are
good and well fastened off, so that the mechanical straincomes on the covering and not on the conductor; but thereceiver cord is too lorg, and the method of fastening thecord on to the transmitter entails taking the transmitter topieces to put on a new cord. The instrument may not provevery economical, because there is no switch in circuit to usewhen not listening to any sound, while the current consump-tion is not low. It has been tried on a number of cases andmost patients could hear distinctly better with it than with-out it. The instrument is made by Messrs. F. Davidson andCo., 29, Great Portland-street, London, W.
A NEW PORTABLE OPERATING TABLE.
l THIS table, recently made to my design, consists through.out of finest seamless steel tubing, except the hinged joints,which are of solid brass, and the ratchets, which are ofpressed steel. The table is absolutely rigid, very strong,and weighs a little over 30 lb. It can be unpacked, set out,and repacked in a few seconds. When closed it measures39 X 21 X 3 in. (Fig. 1), when open it is 71 x 36 x 21 in.(Fig. 2), but it FIG 1. can be manu-
factured anv less .. < heieht tban3ft.The head legs sgiving a largeing the Tren-allied positions ;fitted with solidThe illustrationsclosed and nrtfn-
are slanted,base, and suit-
delenburg andall the legs arerubber feet.
’ show the tablewith the loi3--
foot extension dropped, but it can be fixed in any ofthe positions required in modern surgery. Lithotomy up-rights and straps are provided, and an arm ’rest andinstrument trays which simply catch on to the side of
the table are added. The difficulty met with, even in opera-ting theatre tables, of over-extending the arm, as requiredin dissection of the axilla, has been met by a detachablerotatable bar to which the arm may be attached and held
horizontally at any angle. In addition an upright bar canbe fitted on to any of the legs, or at any ’point on
the upper horizontal bars, on which may be hung a
lamp, an infusion apparatus, and so on ; this also carries acandle-socket. All the tube joints are welded and rounded.The ratchets of the head and foot extensions are detachableand fitted with special sockets preventing any save intentionalmovements. The table is nickel-plated throughout, but canbe enamelled if preferred. For travelling purposes a canvasbag, or a light tin case, or a wooden case, which becomesan instrument table if required, have been provided by the’makers, Messrs. James Gibbons, of Wolverhampton.Wolverhampton. C. A. STIDSTON, M.D. Lomd,C. A. STIDSTON, M.D. Lond.
