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
See fusible link above.
fusible link
A mechanical device that can close an open hoistway door if there is a fire in the vicinity of the dumbwaiter.
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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