The Elevator &

Its Working PrincipleInstructor: Rethwan FaizGroup member:1. Rahman, Ahmed Rezaur – 14-25536-12. Atik, Md Ataul Karim – 14-25862-13. ALI, Md. Niyamot - 14-26531-24. Hasan, Md. Mehedi - 14-26521-25. Hossain, Md. Saroar - 14-27032-2

Topic to be discussed:Types of elevatorElevator working principle Switching of elevatorLatest & upcoming features of

elevatorSafety

Types of Elevator:According to: Hoist Mechanism Building Height Building Types Elevator Location Special Uses

According to hoist mechanism elevators is classified to 4 main types as follows:-

1.Hydraulic Elevetor 2.Traction/pulley Elevetor3.Climbing Elevetor4.Pneumatic Elevetor

According to building heightA- Low-Rise buildings (1- 3 stories):-Buildings up to about (1 to 3) stories typically use hydraulic elevators because of their lower initial cost 

B- Mid-Rise buildings (4 -11 stories):-Buildings up to about (4 to 11) stories typically use Geared Traction Elevators 

C- High-Rise buildings (12 + stories):-Buildings up to about 12+ stories typically use Gear-Less Traction Elevators 

3. According to building types

Elevators will be classified according to building type to 5 main types as follows: 1.Hospital elevetors.2. Residencial /domestic elevetors.3.Industrial elevetors.4.Commercial elevetors.5.Parking buildings elevators.

According to elevator location:-Outdoor Elevator (Inclined elevetor)

Platform elevator

Accoring to special uses:- It is of two types-• Handicapped elevator

Grain elevator

How it works:

Electric motor

lift car

Counter weight

Sheave

Steel cables

Nudge

Governor

switching of elevator:

The block diagram of switching control

Component used in the circuit:• 7485 comparator• 74190 decade counter• 7447 decoder• A 7 segment display

Circuit diagram:

Elevator Safety Rules• Watch Your Step Entering & Exiting – Look D0WN• Leave Closing Doors Alone

• Never Enter an Elevator with A Suspicious Looking Person Inside

Elevator Safety TripsApproaching Elevators

Elevator Safety Reminder• Elevators are mechanical devices – The majority of

the elevator-related injuries and fatalities have occurred when passengers attempt to override the mechanical and safety devices of the elevator.

Thank you