Balustrade —— The side of an escalator extending
above the steps. It includes skirt panels, interior panels,
decks and handrails
Brake shoe —— Moving member(s) of a brake, lined with friction
material which, when in contact with the brake drum, holds the elevator at
floor level. On some types of control, it will stop the elevator when power
is removed from the hoist motor
Brake —— 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. On some types of control, it also stops the elevator when power
is removed from the hoist motor
Callback —— In contract service, a customer request which
requires a check of an elevator other than the regularly scheduled maintenance
Car counterweight —— A set of weights roped directly to the
elevator car of a winding-drum type installation. In practice, this weight
is equal to approximately 70 percent of the car weight
Car operating panel (COP) —— a panel mounted in the car containing
the car operating controls, such as call register buttons, door open and close,
alarm emergency stop and whatever other buttons or key switches are required
for operation
Car or Lift Car —— The load-carrying unit, including its platform,
frame, enclosure, and car door or gate
Controller or Control Panel —— A device, or group of devices,
which serves to control, in a predetermined manner, the lift or escalaor. It
is often described as the 'brain' of the unit
Counterweight —— A weight which counterbalances the weight
of an elevator car plus approximately 40 percent of the capacity load
Door Operator —— A motor-driven device mounted on the car
which opens and closes the car doors
Drive Machine —— The power unit which applies the energy necessary
to raise and lower an elevator, material lift, or dumb waiter car or to drive
an escalator, an inclined lift or a moving walk
Electric or Traction Lift —— Electric or Traction lift — a
lift with an electric machine in which the friction between the hoist ropes
and the machine sheave is used to move the lift car
Geared traction machine —— A traction machine in which the
power from the motor is transmitted to the drive sheave through reduction gears
Gearless traction machine —— a type of elevator hoisting machine
on which the hoist ropes pass over a traction drive sheave which is an integral
part of the armature. Called gearless because no geared reduction unit is utilized
Governor —— (1) a mechanical speed control mechanism.
For elevator, it is a wire-rope driven centrifugal device used to stop and
hold the movement of its driving rope. This initiates the activation of the
car safety device. It opens a switch which cuts off power to the drive motor
and brake if the car travels at a preset overspeed in the down direction. Some
types of governors will also open the governor switch and cut off power to
the drive motor and brake if the car overspeeds in the up direction. (2) on
escalators, a direct-driven centrifugal device which, when activated by overspeed,
cuts off power to the drive motor and service brake.
Governor rope —— A wire rope attached to an elevator car frame
that drives the governor and, when stopped by the governor, initiates setting
of the car safety.
Hydraulic Elevator —— An elevator where the energy is applied,
by means of a liquid under pressure, in a cylinder equipped with a piston.
Preventative maintenance —— Inspections, tests, adjustments,
cleaning and similar activities carried out on elevator and escalator equipment
with the intention of preventing malfunctions from occurring during operation.
It is designed to keep equipment in proper operating order and is done on a
schedule basis. It is also referred to as schedule maintenance.
Traction machine —— An electric machine in which the friction between
the hoist ropes and the machine sheave is used to move the elevator car.
Traveling cable —— A cable made up of electric conductors
which provides electrical connection between an elevator or dumbwaiter car,
or material lift, and a fixed outlet in the hoistway or machine room
