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Thyssenkruppelevator - Vertical Transportation: A Glossary Category: Electronics and Engineering > Elevator terms Date & country: 02/09/2008, USA Words: 208

V-Groove
A groove in the drive sheave which produces a pinching or wedging effect on the cable, used on geared machines.

Wainscoting
Walls extending from the platform to the handrail or in some cases to the underside of the car top. Typically referred to as the finish of walls in a freight elevator.

Vertical transportation
The class of transport for moving people or equipment in the vertical direction

Valve
A hydraulic elevator mechanism that regulates the motion of the elevator by regulating the flow of oil.

Variable Voltage
A method of controlling a DC-driven machine which produces may different speeds.

Typical Floor to Floor Height
The distance between the surface of the finished floor on one landing to the surface of the finished floor on the landing above. Use the Enhanced Calculator when your lobby height is different than the floor to floor height.

Two to One Roping (2:1)
Arrangement of hoist ropes in which one end of each hoist rope passes from a dead-end hitch in the overhead, under a car sheave, up over the drive sheave, down around a counterweight shave and up to another dead-end hitch in the overhead. The car speed is one-half the rope speed.

Two Speed Door
A type of door consisting of two horizontal sliding panels which move in the same direction. The strike jamb panel travels at twice the speed of the return jamb panel and slide in back of it as the doors open and close.

Travel - Total
Net travel plus top and bottom overtravels.

Travel - Net
The distance from the top floor to the bottom floor.

Transom
A panel or panels above an entrance used to close the hoistway enclosure.

Travel
Vertical distance from the finished floor level of the terminal landing to the finished floor of the top landing. See also: Rise

Torque
The pulling effort developed by the motor

Traction
One of two methods by which an elevator is moved, whereby the elevator is 'pulled' up by cables; traction refers to the friction developed between the hoist ropes and drive sheave

Toe Guards (Platform guards)
Steel plates with a flat and an angled surface which reduce the shearing action of the sill or threshold if the doors are opened when the car is not at a landing. Toe guards are secured to the edge of the car platform or the hoistway edge of the sill of the lowest terminal landing.

Tank (Reservoir)
A container to store the oil used to move the elevator.

Terminal landings
The top or bottom landing to which an elevator travels.

Support (Brace) Rods
Slender metal pieces which extend from the platform and are secured another part of the frame to support the platform.

Stopping
The action of final motion of the elevator from leveling speed to an accurate floor level.

Strike jamb
Column against which a horizontal sliding car door closes.

Soffit
Top horizontal piece that forms the entrance frame inside the elevator cab.

Single Speed Door
Door type with one panel which slides to one side, behind the return panel.

Simulation Tools
A complex set of computer tools used by trained experts to simulate a group of elevators responding to hall calls and car calls. Both the Basic and Enhanced Calculator are based on the traditional metrics of Morning Up Peak Traffic. An elevator loads at the lobby, delivers passengers to their floors, and returns empty for the next trip. A traffic analysis is not complete until other scenarios such...

Simplex operation
Controller operation that involves only one car.

Sill Support
The means by which a hoistway door sill is secured to the flooring so that the sill is level with the floor.

Sill
The threshold of a door opening. Most sills include grooves to guide the bottom of the car or hoistway door. ThyssenKrupp Elevator offers a Freedom sill, which is grooveless and is guided from under the sill. Sills extend the full width of the door travel.

Sight Guard
A strip of sheet metal mounted vertically on the leading edge of side sliding elevator doors used to reduce the opening between the leading edges of the hoistway and car doors and to block any sight of the hoistway with the doors are open.

Silencer
A muffler type device installed in the oil line of a hydraulic elevator pump designed to reduce noise produced as oil moves through the line.

Side Post
The normal practice of mounting rails on opposite hoistway wall midways, front-to-back.

Shims
Devices used as fillers to ensure accurate positioning of bolted pieces (such as rails).

Shut Off Valve
A valve in the oil line that may be engaged manually to allow inspection and maintenance of a hydraulic elevator system.

Sheave - Secondary
A pulley on a gearless machine which serves two purposes - 1. To allow each cable a second pass over the drive sheave. 2. To deflect the cable for a straight drop to the counterweight.

Sheave - Drive
The grooved wheel of a traction machine over which hoist ropes are passed and through which motion is initiated.

Sheave - Deflector
A pulley aligned with the drive sheave, which provides a path for the cables to drop straight to the counterweight.

Sheave - Compound
A pulley located on the car and on the counterweight, under which the hoist cables run to double the capacity and reduce the speed of an elevator.

Sheave
Wheel that is mounting in bearings and having one or more grooves over which a rope or number of ropes may pass

Shackle
Threaded rods to which the hoist cables are socketed and which bolt to the hitch plate and the counterweight.

Seismic Switch
Activated by movement in the ground that provides a signal that a potentially damaging earthquake is imminent.

Setting the Safety
The act of triggering the safety to stop the elevator from falling.

Safety Edge - Floor Bars
Simulated floor devices on a selector through which cams pass electrical signals.

Safety Housing
A large clamp that anchors the car to the building to keep the elevator from falling.

Safety Plank
The bottom member of a sling for a traction elevator which contains the safety.

Safety Edge - Drum
A cylindrical device on the selector, to which the selector cable is attached, which (through the gears) transfers the car motion to the selector carriage.

Safety Edge - Cams-Fingers, Wipers
Electrical signaling devices located on the selector carriage and which contact segments of floor bars and thereby pass circuits to a controller.

Safety Edge
A mechanical device driven by the elevator, which simulates elevator movements.

Safety Edge - Cable
A small steel cable attached from the car or counterweight or a drum on the selector by which car motion is transferred to the selector.

Safety
Device on the car or counterweight that will stop the car or counterweight and keep the elevator from falling in case of overspeed, free-fall, or rope stretch.

Ropes (Hoist)
For traction elevators, a strong cord of twisted fibers such as steel which connects the elevator car sling assembly and the counterweight passing over or around the drive sheave. The ropes are used to raise and lower an elevator.

Roller Guides
Guide shoes that use rollers to rotate on the guide rails instead of slide guides.

Reveals
The area on a cab wall between applied panels, typically measures 2 inches.

Rise
Vertical distance from the finished floor level of the terminal landing to the finished floor of the top landing. See also: Travel

Return
The area behind a wall or enclosure where a sliding door panel or gate slides when opening.

Return panel
The panel at the front of the passenger elevator car, adjacent to the entrance, behind which a sliding door passes when opening and closing.

Registered call
A signal initiated by pressing a car or landing pushbutton, indicating a demand for service at or to the landing for which the button was pressed.

Rated speed
The elevator speed in the up direction with the rated load in the car.

Push Button Station
A decorative device containing one or more hand-operated devices (buttons or switches) by which the passenger or freight handler tells the controller what action is desired.

Pushbutton
An insulated button that operates electrical contacts when pressed

Pump (power unit/pumping unit)
The device which draws oil from the tank and pushes it through the oil line to the jack to move the elevator up.

Protection pads
Quilted vinyl which can be hung by hooks or buttons on the cab walls for protection.

Protection pads
Removable canvas or vinyl pads used inside the elevator cab to protect the wall & front finishes.

Power Unit
The device on hydraulic elevators which supplies the motive force to run the car.

Power Doors
Doors which are propelled by electric motor(s). Power doors on Freight Applications are supplied by the general contractor.

Plunger
The inside, moveable part of a hydraulic jack that is attached to the platen plate of a car sling.

Position Indicator
A light fixture which indicates the relative position of the elevator within the hoistway. When placed in a lobby/landing, it is referred to as a hall position indicator. Inside the cab, it is referred to as a car position indicator.

Platform Isolation Pads
Rubber or other vibration absorbing material which reduces the transmission of vibration and noise to the platform.

Platen plate
A plate, used to attach the jack to the bolster assembly of a hydraulic elevator.

Platform
The floor of the elevator, placed in the sling and supported by brace rods in each corner, on which passenger stand or the load is carried.

Pit Channels
Steel channels on the pit floor to distribute the hydraulic elevator load from pit brackets across the floor, anchor the guide rails and other pit-mounted devices, and support car and counterweight buffers.

Pit
The area at the bottom of the hoistway under the car, extending from the sill level of the lowest landing to the floor at the bottom of the hoistway.

Passenger Elevator
An elevator used to carry people.

Penthouse
The machine room above the hoistway on traction elevators.

Pickup Rollers
Devices on the hoistway door which mate with the clutch on the car door to allow the hoistway doors to be pulled open and closed.

Panel Arrangement
The arrangement/layout of the applied panels inside an elevator cab.

Overtravel
A short distance beyond the terminal floor as allowance for building inaccuracies, manufacturing or installation inaccuracies.

Overhead machine
Standard machine room location on a traction elevator, the machine room is located above the elevator hoistway

Overhead
The upper portion of the elevator hoistway. Overhead is determined by the elevator application.

Overspeed Valve
A valve which reduces the speed of a hydraulic elevator when it detects that the speed exceeds a predetermined rate.

Operation - Constant Pressure
A very simple form of elevator operation where the elevator runs only as long as a button is pushed and can handle only one call at a time.

Operation - Selective Collective
A modern form of elevator operation where the system accepts and remembers an infinity number of calls and answers them as the car moves in the appropriate direction.

Operation
The system by which the elevator responds to car and hall calls.

One to One roping (1:1)
Arrangement of elevator hoist ropes in which one end of each hoist rope passes from the car hitch over the machine sheaves to the counterweight hitch. With 1:1 roping, the car, counterweights, and hoist ropes all travel at the same speed.

Oil Line
The piping on a hydraulic elevator that channels the oil from the power unit to the jack.

One Floor Run Circuit
A special circuit used when the elevator must run from one floor to another wherein the distance is so short that acceleration and deceleration might overlap.

Number of Openings
Most elevators feature doors on one side of the car. Some applications will require two sets of doors - front and rear doors. On floors where both sets of doors open, the time the car remains at that floor is diminished since passengers may disembark more rapidly.

Number of Elevators
The number of elevators necessary to meet your requirements. This number is derived from a traditional traffic calculation during morning up peak. In this scenario, an elevator loads at the lobby, delivers passengers to their floors, and returns empty for the next trip. Request a full simulation to analyze more complicated situations where a group of cars controlled by specific dispatcher logic se...

Modernization
Process of upgrading existing elevator equipment to modern standards. Some modernizations are accomplished by adding new architectural features, ADA compliant features, or upgrading due to safety features on equipment.

Microlight
ThyssenKrupp Elevator`s version of a door protection device in the form of a curtain of light beams extending in front of the car door's leading edge. Whenever interference with these beams is detected, the door retracts.

Max Car Loading
The percentage of total capacity that the car carries on each round trip. Even though the nameplate on a 3500 pound car lists the capacity as 21 persons, it is very unusual that 21 people will crowd into the car. This averages about 80% but can vary depending upon tenant behavior and culture.

Main egress
The floor of a building that is the `entry” & `exit” point of the building. Indicated by a star symbol in the car operating panel next to the appropriate pushbutton and in the hall jamb symbols.

Machine Room
A room where traction machines or hydraulic power units for elevators are located.

Machine beams
Horizontal steel beams that support the elevator driving machine of a traction application. The machine beams carry the load of the drive machine, elevator car and counterweights.

Machine - Gearless
Gearless Traction machines for elevator of 500 fpm or higher in which the drive sheave is directly connected to the motor. The hoist ropes pass over a traction drive sheaves, which is integral with the armature.

Machine - Geared
Geared Traction machines for elevators of 500 fpm of less in which the drive sheave is connected to the motor through a gear train. Power from the motor is transmitted to the drive sheave through reduction gears.

Lubricator
Applicators which feed oil to the rail and provide proper lubrication for sliding guide shoes.

Load
Capacity rating in pounds which an elevator is designed to safely handle.

Lobby Floor Height
The main lobby is often taller than other floors. Lobby height should be entered separately as the distance from the top of the lobby's finished floor to the top of the finished floor of the next landing. Small express zones may be accommodated by using the distance from the lobby to the next landing served by the elevator. For example, if the cars do not stop at floors 2 and 3, then you may ente...

Limited Access Features
Car Call Lockout – a feature which allows the user to prevent car calls from being registered at specific floors. Car calls are typically locked out by using keyswitches, card readers, key pads and computer-based monitoring systems.

Leveling
A slow rate of speed used for the final approach to a floor to ensure an accurate floor stop; the movement of an elevator toward the landing sill when it is within the leveling zone

Landing zone
A zone extending from a point 18” below an elevator or material life landing, to a point 18” above the landing.

Landing doors
The movable door at the entrance of an elevator; this door provide access to the hoistway when the elevator is on hoistway access