2
-
2 phase vs 3 phase & what they are
3 phase power has 3 sine waves of electric current – typically commercial power supply. 1 phase has one sine wave of current – typical residential power supply.
A
-
Automatic Load & Unload
An operation where carts or tote boxes containing materials to transport are automatically loaded or unloaded on or off the dumbwaiter.
-
Automatic Call & Send
Typical dumbwaiter operation with one pushbutton for each floor served by the dumbwaiter located at each floor.
-
ASME
American Society of Mechanical Engineers
-
Approval Drawings
Shop drawings submitted for approval to be manufactured
-
ANSI A17.1
American National Standards Institute USA Elevator Code
-
Angle Towers
A supporting angle skeleton inside hoistways to support dumbwaiter guide rails when rail brackets cannot be supported by the shaft walls.
-
Alarm Station
A fixture station inside a material lift with a stop switch and alarm bell pushbutton
-
AIA
American Institute of Architects. The leading architectural association for accrediting architects.
-
Adjacent Opening
A dumbwaiter with hoistway doors at front and side locations.
-
Access Switch
An electrical switch to shut off power when the access door is opened.
-
Access Door Switch
An electrical switch to shut off power when the access door is opened.
-
Access Door
A swing door mounted at the machine location in the shaft wall for service/maintenance of the hoist machine.
B
-
Budget Pricing
A rough guess or a ballpark price instead of a firm price.
-
Broken Cable Safety Counterweight
A device that locks the counterweight onto the guide rails if the hoist cables slacken or break.
-
Broken Cable Safety
A device that locks the car enclosure onto the guide rails if the hoist cables slacken or break.
-
Brake motor
A hoist motor that contains an elevator safety brake mounted internally.
-
Bracketing
Attachment pieces that mount dumbwaiter guide rails to shaft walls.
-
Bolt Together
Components which are held together by bolts or screws and not by welds.
-
BOL
See the Bill of Lading above.
-
Bill of Lading
A shipping document that allows common carriers to legally transport goods
-
Bi-Parting Door
A vertical sliding hoistway door where half slides upward and half slides downward to open.
-
Bearings
Inserts of sleeve inserts which allow sheaves or shafts to rotate freely without heat or friction
-
Bank
A term for a group of operating pushbuttons at a dumbwaiter landing.
-
B44 Codes
Canadian national elevator code
-
B.20.1 Code
USA national conveyor code
-
B Labeled Door
Underwriters Laboratories (UL) 90-minute fire rating for hoistway doors.
C
-
counterweights
A weight mounted on guide rails and connected to the hoist cables that counterbalances the car enclosure and car capacity.
-
counterweight sling
A steel frame which is suspended by the hoist cables and holds the counterweight weights.
-
counterweight broken cable device
A device which locks the counterweight onto the guide rails if the hoist cables slacken or break.
-
counter height
The term for a dumbwaiter door sill that is above the finished floor.
-
controller cabinet
See control cabinet above.
-
controller
An assembly of electrical components which operates the dumbwaiter.
-
control cabinet
A cabinet, usually steel, and with a self closing lockable door, in which the electric system controller is located.
-
collapsible car gate
A car gate that is open construction and closes horizontally in scissor fashion.
-
code
A formal building regulation document.
-
CMU Masonry
Cement Masonry Unit. A cement block wall type that can be used for dumbwaiter shaft construction.
-
Closed-Loop Feedback
A sensing device that provides the lift controller with information regarding the car position and FPM speed.
-
Clear Overhead
The distance from the finished floor at an upper landing to the underside of the shaft ceiling or lowest point of obstruction at the top of the shaft.
-
Clean Room
An environment with restrictions regarding airborne particulate emissions
-
Circuit Breaker
A device to break the electric current of a circuit.
-
Central Dispatch
An operation where there is a single hall station with pushbuttons for the other landings and no send capability at the other landings.
-
CECA
Canadian Elevator Contractors Association
-
CEA
Chicago Elevator Association
-
Cart Guidance Rollers
Plastic [usually] rollers mounted in hoistway door jambs which guide and assist the cart movement in and out of the car enclosure.
-
Cart coupler
A latching device attached to the bottom of carts that couples with the car mounted transfer arm to load or unload the cart into or from the car enclosure.
-
Cart Call Sensing Switch
Electronic sensing devices that detect when a cart is present at a landing and can call the lift to make a delivery
-
Cart Bumper Strips
Nylon surface mounted strips attached to the car enclosure walls to prevent carts from scratching the car walls when pushing the carts onto the dumbwaiter.
-
Cart
A wheeled container that carries material and can be pushed into a dumbwaiter for transport to another floor.
-
Carriage
A type of platform which carries a car enclosure.
-
Card Reader
A type of security device which restricts dumbwaiter users to authorized personnel only.
-
Car Top Sheaves
Car top-mounted cable deflector pulleys under which the hoist cables pass.
-
Car Top Inspection Station
A car top device which allows a service mechanic to run the car while riding atop the car for service, inspection and/or maintenance.
-
Car Top Alarm Bell
An alarm warning bell mounted atop the car enclosure that sounds when any alarm button is pressed.
-
Car Top
The top of the car enclosure
-
Car Sling
A steel frame which is suspended by the hoist cables and holds the car enclosure.
-
Car Mounted Transfer Device
The device or mechanism which automatically loads/unloads the cart or tote box into/out of the car enclosure.
-
Car Mounted Sensors
Sensors which are provided with automatic load/unload lifts to determine if a cart or tote box is properly loaded inside the car enclosure.
-
Car Light
A light that is mounted in the walls or top of the car enclosure.
-
Car Enclosure
The cargo-carrying component of a dumbwaiter which travels up and down in the shaft.
-
Car
The cargo-carrying component of a dumbwaiter which travels up and down in the shaft.
-
Capacity
The maximum weight allowed to be carried on a dumbwaiter.
-
Cantilever
Car guide rails on one side of the shaft only as opposed to guiding rails on 2 sides of the shaft.
-
CAD
Computer-assisted drafting. 2-dimensional computer-generated shop drawing
-
Cable Shackles
A device which is a means of connecting the hoist cables to a car sling, car enclosure or a counterweight.
D
-
dumbwaiter
A lift system for hoisting material vertically within a building and has code-regulated width, depth and height size, and lifting capacity.
-
drum below
A hoist machine that is below the car at the bottom landing.
-
drum above
A hoist machine that is located above the car at the top landing.
-
drive
An electrical component that regulates the speed of a dumbwaiter, the starting acceleration, stopping deceleration and the final stopping and leveling.
-
drip pan
A pan that fits within a car enclosure to contail liquid spillage.
-
driectional switch
Switches located inside the hoistway to stop the dumbwaiter at a selected landing.
-
drawbridge
A device which is car mounted and falls into place over the running clearance when car gate opens to provide smooth entrance for wheeled carts.
-
double contact interlock vs single contact
Single contact door lock ensures door is closed. Double contact door lock ensures door is both closed and locked using 2nd contact.
-
double cable drum
A hoist machine that has 2 separate cable drums for winding 2 hoist cables.
-
door tracks
The steel guides that contain and guide the door panels vertically as the doors are opened and shut.
-
door jamb
The side pieces of a dumbwaiter door frame.
-
door emergency release
A device mounted at landings to unlock the door interlock when the dumbwaiter car is not present at that landing.
-
door
An entrance into the hoistway at a landing to access into the dumbwaiter upon arrival of the dumbwaiter at that landing.
-
dirty approval
An approved for manufacturing shop drawing that has incomplete information and cannot be processed into manufacturing until shop drawing is corrected.
-
deflector sheave
A sheave that deflects the hoist cables to a different position in the hoisway.
E
-
explosion proof rated
See electrical classification above
-
explosion proof
See electrical classification above
-
encoder
See closed loop feedback above.
-
emergency release
See door emergency release above.
-
elevator code
The ANSI 17.1 National Elevator code in the USA that regulates Elevators, Dumbwaiters & Escalators
-
electrical classification
(class 1,div. 1)One of the hazardous environment classifications of the NEC – National Electrical Code.
-
EESF
Elevator Escalator Safety Foundation – an industry educational association.
F
-
fusible link
A mechanical device that can close an open hoistway door if there is a fire in the vicinity of the dumbwaiter.
-
fusible link
See fusible link above.
-
fused disconnect switch
A circuit breaker where the electrical trades provide the power supply to the Dumbwaiter.
-
freight carrier
The trucking company that is selected for carrying a shipment.
-
free standing tower
A support tower that is not dependent on the building for support.
-
FPM
Feet Per Minute – how fast is the speed of the dumbwaiter travelling when moving.
-
FOB
Free On Board. A shipping term that states if shipping costs are included in the quoted price. FOB Matot plant would not include shipping cost.
-
floor to floor height
See floor height above.
-
floor loading
The term for a dumbwaiter that stops level with the landing floor.
-
floor height
The distance from one floor to the next floor vertically.
-
flat sill
A floor loading door sill that lies flat upon a finished floor as opposed to a door sill fit into a floor recess.
-
flat band structure
The tie pieces that hold a supporting angle tower together
-
fixtures
A term for pushbutton stations, hall position indicators and audio- visual signal fixtures.
-
fireproof filler in door
A fire resistant filler that is inserted within a hollow metal door
-
fire-rated door & entrance
See B labeled door above.
-
fire rated
The rating of the shaft or entrance door relating to the amount of time of fire resistance during a fire.
-
finished floor
The elevation at a landing of the complete floor including the underlayment and tile.
G
-
guide shoes
Guide pieces or rollers attached to the car enclosure that fit around the guide rails.
-
guide shoes
Guide pieces or rollers attached to the car enclosure that fit around the guide rails.
-
guide rails
The structural steel members that extend the height of the hoistway to guide the car up and down the hoistway.
-
gearcase
The hoist machine component that reduces the RPM speed of the hoist motor to the proper output speed required for the dumbwaiter.
-
gauges of steel
Measurements of standard thicknesses of steel.
-
gate switch
An electrical switch that will not allow the dumbwaiter to move unless the car gate is closed.
-
gate stack side
The side of the car enclosure which receives the horizontally collapsible car gate when that type gate is provided.
-
gate
A door that is bart of the car enclosure that must be closed when the dumbwaiter is moving.
-
gate
A door that is bart of the car enclosure that must be closed when the dumbwaiter is moving.
-
gasketed access door
A seal that is sometimes used on a machine access door to protect against water or smoke
-
gap closure
Steel pieces used to minimize the running clearance gap between the hoistway door sill and the moving car enclosure.
-
GAL
A very large elevator equipment manufacturer whose products include swing door interlocks. Recently acquired by Vantage
H
-
HP
Abbreviation of horse power
-
horse power
The measurement of the output capacity of a motor.
-
hoistway wall
See hoistway above.
-
hoistway frame
The frame is the trim of a hoistway door which fits the door into the hoistway shaft wall type.
-
hoistway door
See door above.
-
hoistway access switch
A switch which is used by a service technician to run the dumbwaiter away from a landing with a door open.
-
hoistway
The name for the shaft in which a dumbwaiter moves up and down. Usually hoistways must be fire rated.
-
hoist ropes
Another name for hoist cables which are steel cables and not ropes.
-
hoist motor and windings
The motor windings are what makes the hoist motor output shaft rotate.
-
hoist brake
A hoist machine component that clamps the motor shaft when the car stops at a landing.
-
HEPA filter
A type of filter that might be used to blow purified air into a dumbwaiter car for different types of sterility requirements.
-
heavy duty
Large car – large capacity
-
head piece
The top piece of a dumbwaiter door frame.
-
hall stations
Another term for pushbutton stations at the landings for operating a dumbwaiter
I
-
invertor drive
One type of drive used by Matot for low speed applications. See drive def.
-
interlock rollers
The part of a door interlock that contacts a cam on the car enclosure when the car is present at that landing.
-
interlock
A door locking device to keep hoistway doors closed and locked at a landing unless the car is present at that landing.
-
intercom system
A means of vocal communication between 2 or more locations
-
inline opening
Landing doors are all on a single side of the shaft
-
illuminated pushbuttons
Pushbuttons which illuminate when activated.
K
-
keypads
Security devices which can be utilized to restrict use of dumbwaiter to only authorized persons.
-
KAFKA door
A dumbwaiter door manufactured by Kafka Manufacturing, Inc. A competitor of Matot.
L
-
low overhead door
A hoistway door that has special design door tracks to reduce their length – see door tracks above.
-
liquid containment system
See drip pan above.
-
limit switch
See directional switch above.
-
lighted jewel
See illuminated pushbuttons above.
-
light duty
Small car, light capacity
-
leveling
The stopping of a dumbwaiter at the same elevation level as is the door sill.
-
lateral loads
Sideway loads – as opposed to vertical loads.
-
landing
Floor of a building where there is a dumbwaiter door.
M
-
modernization
The upgrading of a dumbwaiter to new components usually by replacement of old controls and machines.
-
mezzanine lift
A vertical reciprocation conveyor that travels from a warehouse floor to the edge of a storage mezzanine above.
-
metal safety barrier exposures
The open mesh hoistway of a vertical reciprocating conveyor.
-
material lift
A lift that is larger than a dumbwaiter and defined by the elevator regarding size, capacity and where it can be installed.
-
Maritime vessels
Ships and oil rigs
-
manually operated
Doors and gates tat are operated by hand power rather than power operation.
-
magnetic clutch assembly
A device that is mounted on the shaft side of a power hoisway door to couple with a magnetic gripper on the gate to open or close the door.
-
magnet gripper
A device that is mounted on a motorized power gate that magnetically grips the hoistway door clutch plate to pull the door open or closed.
-
machine room
A room that houses the machine and controllers.
-
machine base
The structure that connects the hoist machine to the building or the guide rails.
-
machine access door switch
See access door switch above.
N
-
nylatron
An oil impregnated nylon material used for dumbwaiter guide shes.
-
NEMA rating
The classification of requirements for electrical components in different envronments regarding moisture and explosive atmospheres.
-
NEMA 4 pushbutton
A pushbutton station with water tight gasketing.
-
NAEC
National Association of Elevator Contractors the main USA elevator organization.
O
-
overhead clearance
See clear overhead above.
-
overhead application
Machine located over the top of the car at the top of the shaft
-
OVDS
Order Verification Data Sheet – a form sent by Matot to obtain shipping information for orders being shipped out.
-
opposite opening
Dumbwaiters which have doors on both the front and rear of the hoistway.
-
openings
See door above.
-
occupied space
Space below a hoistway which may be occupiable by persons and must be protected.
P
-
PVC cart bumper strips
See cart bumper strips above.
-
pushbuttons
A button which is hand pressed to cause a dumbwaiter to come to that landing or be sent to another landing.
-
pushbutton fixture
A group of operating pushbuttons and signals usually located in a wall mounted electrical box with a metallic faceplate.
-
pushbutton contact
The electrical switch beneath a pushbutton swith to register a call when pressed
-
Programmable Logic Controller
Device in controller which can change the operation if needed.
-
Program key switch
Key [usually] switch in main pushbutton station to change system from cart dispatch program to return program or from auto loading / unloading to manual loading
-
production drawings
See approval drawings above.
-
pre-wired car top
Factory wiring of the travel cable, car light and gate switch instead of wiring these items as part of the field installation.
-
powered outboard receiving tables
Motorized conveyor tables that receive tote boxes or load tote boxes into an auto load unload dumbwaiter.
-
power supply
The electric power that is available for a dumbwaiter.
-
power operator
A motorized device that power opens a hoistway door or car gate
-
power gates
A car gate that is motor operated rather than manually operated.
-
power gate operator
See magnetic gripper above.
-
power door
A hoistway door that is motor operated rather than manually operated.
-
position indicator
A hall fixture which displays the floor location of the car and direction car is moving.
-
PLC
Programmable Logic Controller – device in controller which can change the operation if needed.
-
platform
The structure which supports the finished car floor.
-
pit stop switch
A pit located switch to shut off lift while servicing the pit area.
-
pit shelter space protective device
A non-removable means of suspending a material lift above the floor at the bottom landing for pit service access.
-
pit ladder
A permanent ladder to provide service access to the pit – usually provided for passenger elevators
-
pit depth
The distance from the finished floor, lowest landing to the bottom of the pit.
-
pit
An extension of the hoistway beneath the finished floor at the lowest landing.
Q
-
QIR
Quality Improvement Report – A quality / defect report previously used at Matot.
R
-
running clearance
The distance between the inside of the shaft and the surfaces of the moving car enclosure.
-
roped hydraulic
A type of hydraulic lift utilizing an hydraulic lift and cables for hoisting and lowering.
-
roller guides
See guide shoes above
-
restricted pit
A shallow pit requiring the use of single panel slide up doors.
-
reinforced floor
A heavy metal sub-floor of a floor loading dumbwaiter car enclosure.
-
rear panel
The shaft side panel of a hollow metal door.
-
rated load
See capacity above.
-
rails
See guide rails above.
-
rail bracket
See bracketing above.
S
-
swing door
A side hinged entrance door which swings out from the shaft like a room door.
-
supporting tower
See self supporting angle tower above.
-
submittal drawings
See approval drawing above.
-
stops
See door above.
-
stop & alarm station in car
See alarm station above.
-
steel angle
Steel shape used in dumbwaiter fabrication with 90 degree form – usually used for car frames or support towers.
-
stainless steel vs carbon steel
Stainless steel used for food service, health car and appearance applications – Painted steel used more for back room, shop and warehouse applications
-
spring buffer
Springs at the bottom of the hoistway to cushion the car to a stop if the car does not stop on reaching the normal and final travel limit switches.
-
speed govenors
Devices which measure the traveling speed of a lift and cause the car or counterweight safety to lock the car to the guide rails if overspeed condition occurs
-
specifications
A bid document that provides the description and requirements for a dumbwaiter.
-
special cable drum
A custom cable drum which has a greater cable wrapping capacity than stock drums.
-
Spec
See specification below.
-
slow down switch
An electrical switch mounted in the hoistway to initiate slow down for stopping at a landing with a variable speed dumbwaiter.
-
slide-up gate
A single panel car gate which slides completely upward when opening to satisfy shallow pit condition of a floor load dumbwaiter.
-
slide up door
A single panel door which slides completely upward when opening to satisfy shallow pit condition of a floor load dumbwaiter.
-
slack cable switch
An electrical – mechanical device on a drum dumbwaiter to shut off dumbwaiter if cable slackens.
-
skate wheel runoff table
A tote lift unload table which has mechanical rollers and wheels outside of the dumbwaiter for unloading materials.
-
single speed
A dumbwaiter having a one speed hoist motor which does not provide curved acceleration / deceleration when starting / stopping.
-
sill height
See counter height above.
-
sill
The bottom metal piece of a hoistway door frame.
-
shelves
Shelves in car enclosure to carry multiple items – can be made to be at adjustable heights in car enclosure.
-
shelter space switches
Switches at the top of the hoistway which stop the car to provide shelter space for service person riding car top using car top inspection station.
-
sheave
A grooved pulley which carries hoist cables within the grooves.
-
shaft
See hoistway above – 2 terms for same item
-
Sequence of Operation
A step by step list of sequential equipment operations to initiate and effect the delivery of a cart or tote box from one floor to another.
-
semi tower
A support tower on only one side of the shaft – used for adjacent opening dumbwaiters.
-
self-closing emergency release
An emergency release cover which is spring loaded and self closes – Also see emergency release
-
self supporting angle tower
See angle tower above
-
seismic calculations
Engineering calculations which encompass seismic reaction encountered by a lift of any type during an earthquake.
-
safety enclosure
A term meaning the expanded metal hoistway material of a vertical reciprocating conveyor.
-
safeties
See broken cable safety above.
T
-
truckable sill
Door sills of floor loading dumbwaiters reinforced for bearing the load of wheeled carts.
-
truckable
See truck floor above.
-
truck floor
A floor loading dumbwaiter floor reinforced for bearing the load of wheeled carts.
-
tray slides
Angles mounted on the left and right sides of the car enclosure to permit food trays to be inserted into the dumbwaiter for transport
-
travel speed
The speed in feet per minute at which the car enclosure moves up and down.
-
travel cable
An electrical cable inside the hoistway which attaches to the car top to supply power to the car electrical components such as gate switch and car light.
-
transom panel
An extended portion of the door frame which can be removed for access to the car for service or easy replacement of car.
-
traction sheave
A type of sheave with V grooves which do not allow hoist cables to slip as they pass over the sheave down to the car and counterweight.
-
traction machine
A type of lift machine which has car at one end of hoist cables / counterweight at other end with hoist cables passing over a traction sheave turned by the machine.
-
tower
See self supporting angle tower above.
-
tote box
A tote box used to carry materials with an automatic load / unload dumbwaiter.
-
top solid stop
A steel bumper located within the guide rail at the top of the hoistway to stop the car if it travels through the final limit switch.
-
terminal landing
The bottom or top landing.
-
tee stabilizer
An additional tee guide rail used in some guide rail set ups.
-
tee rail
A structural guide rail type with the appearance of the letter T
-
tape selector head
The car mounted device that reads the magnetic signals from the tape selector as car travel through the hoistway.
-
tape selector
A stopping and slowing device inside the hoistway which is a full height of hoistway metallic tape with magnetic locators to inform controller of car location.
U
-
under slung design
Design for drum dumbwaiters where car deflector sheaves usually on the top of the car are mounted on the bottom of the car.
-
under counter lights
Car light in the side of the car enclosure when the car’s top is not able to be used for mounting the car light.
-
UL label
See B labeled door above.
V
-
VVVF
Variable Voltage Variable Frequency the formal term for the variable speed AC drive and control used by Matot.
-
VRC
See vertical reciprocating conveyor above.
-
vortex
A computer storage system used by Matot to store job files.
-
vibration isolation pds
A type of neoprene vibration absorbing padding used to isolate guide rail brackets and machine beams from transmitting vibration to building structure.
-
Vertical reciprocating conveyor
A type of vertical lift defined by the ASME B.20.1 Conveyor Code
-
vector drive
A type of drive used for high speed applications – See drive.
-
variable speed AC
A type of dumbwaiter with an electrical component [drive] that regulates the speed of the dumbwaiter – faster for travelling, slower for starting, stopping.
W
-
wiring material
The electrical wiring material required to install a dumbwaiter and connect all the electrical componentry. Sometimes provided by Matot.
-
winding drum machine
A type of dumbwaiter machine that turns a scored drum containing hoist cable on the groove – turns drum to wrap to raise dumbwaiter – unwraps to lower car.
-
wall thickness
The finished dimensional thickness of shaft walls containing hoistway doors.
X
-
x-brace tower
A self supporting tower with the tower section above the top floor standing without any building support needed.
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