Elevator & Escalator Emergencies Flashcards
A _____ is an electro-mechanical device used to prevent the elevator from moving when the car is at rest and no power is applied to the hoist motor
Brake
The ______ stops a descending car or counterweight from moving beyond its normal limit by storing or absorbing and dissipating the car or counterweight’s kinetic energy
Buffer
A ____ __________ _______is a panel mounted inside the car containing the car operating controls
car operation station
This chain balances an elevator car’s load. The hollow, black flexible tubes are filled with solid metal balls and are connected to the elevator car and the counterweights. The weight of these cables balances the elevator car’s load
Compensation chain
A __________ is a device or group of devices that control the direction, speed, and safety mechanisms on the elevator
controller
The _______ ____ is an enclosed space outside the hoistway that is intended for full-body entry and contains the motor controller. The room may also contain electrical or mechanical equipment used in conjunction with the elevator, dumbwaiter, or material lift, but not with the electric driving machine or hydraulic machine.
control room
The ________ _____ can be located inside or outside the hoistway. It contains the motor controller and is intended to be entered with or without full-body entry. This space may contain the electrical or mechanical equipment used in conjunction with the elevator, dumbwaiter, or material lift, but not the electric driving machine or hydraulic machine.
control space
The_____________ is a set of weights roped directly to the elevator car in a winding drum installation. In practice, this weight equals approximately 70% of the car’s weight. It is designed to reduce the work required by the electric motor to move the elevator car.
counterweight
The ____ ________is a motor-driven device mounted on the top of the car that opens and closes the car and hoistway doors
door operator
The is the cylindrical keyhole on the hoistway door that elevator drop keys pass through to reach the hoistway door locking mechanism.
escutcheon tube
This switch is located in the elevator shaft. It prevents the elevator from descending or ascending too low or too high in the shaft
Final limit switch
This term refers to the area of the hoistway that extends from a
point 18 in. below and 18 in. above the landing.
Landing zone
This is an electrical disconnect usually found inside the machine room near the entrance door (see Figure 12). Pulling the side lever down removes all operating power from the elevator.
Mainline disconnect
Four types of hoisting mechanisms are associated with elevators?
Hydraulic, traction, climbing & pneumatic
________ _________ have piston support at the bottom that pushes the elevator up as an electric motor forces hydraulic fluid into the piston. The elevator starts moving as the piston releases the fluid through the valve. Have a maximum travel speed of 200 ft per min and are typically installed in low-rise buildings with two to eight floors.
Hydraulic elevators
________ ________ cars are raised and lowered by rolling steel ropes over a deeply grooved pulley, commonly called a sheave. A counterweight balances the weight of the car. The counterweight makes the elevator more efficient by offsetting the weight of the car and occupants, thereby reducing the weight the motor must move.
Traction elevator
Hydraulic elevator machine rooms are most often located close to the associated elevators on the?
Ground floor or basement