#mechanism  device consisting of a piece of machinery; has moving parts that perform some function
  supertype:  device  an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
  subtype:  action_mechanism__action  the operating part that transmits power to a mechanism; "the piano had a very stiff action"
     subtype:  gunlock__firing_mechanism  the action that ignites the charge in a firearm
        subtype:  flintlock  a gunlock that has flint embedded in the hammer; the flint makes a spark that ignites the charge
        subtype:  wheel_lock__wheellock  an obsolete gunlock using flint and a revolving wheel
     subtype:  movement.action_mechanism  the driving and regulating parts of a mechanism (as of a watch or clock); "it was an expensive watch with a diamond movement"
     subtype:  piano_action__pianoaction  action consisting of a system of levers that move a felt hammer to strike the strings when a key is depressed
     subtype:  pump_action__slide_action__slideaction  action mechanism in a modern rifle or shotgun; a back and forward motion of a sliding lever ejects the empty shell case and cocks the firearm and loads a new round
  subtype:  actuator  a mechanism that puts something into automatic action
     subtype:  rotary_actuator__positioner  (computer science) the actuator that moves a read/write head to the proper data track
  subtype:  robot__automaton__golem  a mechanism that can move automatically
     subtype:  android__humanoid__mechanical_man  an automaton that resembles a human being
  subtype:  axis_of_rotation__axis  the center around which something rotates
     subtype:  pivot.axis_of_rotation__pin  axis consisting of a short shaft that supports something that turns
        subtype:  fulcrum  the pivot about which a lever turns
        subtype:  pintle  a pin or bolt forming the pivot of a hinge
     subtype:  rotor_head__rotorhead__rotor_shaft__rotorshaft  the axis around which the major rotor of a helicopter turns
  subtype:  carriage  a machine part that carries something else
     subtype:  typewriter_carriage  a carriage for carrying a sheet of paper
  subtype:  cartridge_ejector__cartridgeejector__ejector  a mechanism in a firearm that ejects the empty shell case after firing
  subtype:  cartridge_extractor__cartridgeextractor__cartridge_remover__cartridgeremover__extractor  a mechanism in a firearm that pulls an empty shell case out of the chamber and passes it to the ejector
  subtype:  clockwork  any mechanism of geared wheels that is driven by a coiled spring; resembles the works of a mechanical clock
  subtype:  controller__control  a mechanism that controls the operation of a machine; "the speed control on his turntable was not working properly"; "I turned the controls over to her"
     subtype:  cruise_control  control mechanism for keeping an automobile at a set speed
     subtype:  dial.controller  the control on a radio or television set that is used for tuning
     subtype:  disk_controller  (computer science) a circuit or chip that translates commands into a form that can control a hard disk drive
     subtype:  governor.controller__regulator  a control that maintains a steady speed in a machine (as by controlling the supply of fuel)
        subtype:  timer.governor  a regulator that activates or deactivates a mechanism at set times
     subtype:  handwheel  control consisting of a wheel whose rim serves as the handle by which a part is operated
        subtype:  steering_wheel__wheel  a handwheel that is used for steering
     subtype:  joystick  a manual control consisting of a vertical handle that can move freely in two directions; used as an input device to computers or to devices controlled by computers
     subtype:  regulator  any of various controls or devices for regulating or controlling fluid flow, pressure, temperature, etc.
        subtype:  aperture  a device that controls amount of light admitted
        subtype:  ballcock__ball_cock  floating ball that controls level in a water tank
        subtype:  draft.regulator  a regulator for controlling the flow of air in a fireplace
        subtype:  faucet  a regulator for controlling the flow of a liquid from a reservoir
           subtype:  mixing_faucet  single faucet for separate hot and cold water pipes
           subtype:  stopcock__cock__turncock  faucet consisting of a rotating device for regulating flow of a liquid
           subtype:  water_faucet__waterfaucet__water_tap__watertap__tap__spigot__hydrant  a faucet for drawing water from a pipe or cask
        subtype:  flywheel  regulator consisting of a heavy wheel that stores kinetic energy and smoothes the operation of a reciprocating engine
        subtype:  peg  regulator that can be turned to regulate the pitch of the strings of a stringed instrument
        subtype:  petcock  regulator consisting of a small cock or faucet or valve for letting out air or releasing compression or draining
        subtype:  register.regulator  a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device
        subtype:  safety_valve__relief_valve__escape_valve__escape_cock__escape  a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
        subtype:  sluicegate__sluice_valve__floodgate__penstock__head_gate__water_gate__watergate  regulator consisting of a valve or gate that controls the rate of water flow through a sluice
        subtype:  thermostat__thermoregulator  a regulator for automatically regulating temperature by starting or stopping the supply of heat
           subtype:  cryostat  a thermostat that operates at very low temperatures
           subtype:  pyrostat  a thermostat that operates at very high temperatures
     subtype:  switch__switch_device  control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit
        subtype:  commutator  switch for reversing the direction of an electric current
        subtype:  ignition_switch  switch that operates a solenoid that closes a circuit to operate the starter
        subtype:  push_button__push__button  an electrical switch operated by pressing a button; "the elevator was operated by push buttons"; "the push beside the bed operated a buzzer at the desk"
           subtype:  bell_push  a button that is pushed to ring a bell
           subtype:  doorbell__bell__buzzer  a push button at an outer door that gives a ringing or buzzing signal when pushed
              subtype:  night_bell__nightbell  a doorbell to be used at night
           subtype:  horn_button  a button that you press to activate the horn of an automobile
           subtype:  mouse_button__mousebutton  a push button on the mouse
           subtype:  reset_button__resetbutton  a push button that you press to activate the reset mechanism
        subtype:  selector_switch__selector  a switch that is used to select among alternatives
           subtype:  telephone_dial__telephonedial__dial  a disc on a telephone that is rotated a fixed distance for each number called
        subtype:  time-switch  a switch set to operate at a desired time
        subtype:  toggle_switch__toggle__on-off_switch  a hinged switch that can assume either of two positions
           subtype:  DIP_switch__dual_inline_package_switch  (computer science) one of a set of small on-off switches mounted in computer hardware; used in place of jumpers to configure the machine for a user
        subtype:  switching_object__switchingobject
           subtype:  toll_switch
           subtype:  office_switch
           subtype:  tandem_switch
           subtype:  router
           subtype:  PBX  public branch exchange
           subtype:  international_gateway  international switch
     subtype:  valve  control consisting of a mechanical device for controlling the flow of a fluid
        subtype:  throttle__accelerator__throttle_valve  a valve that regulates the supply of fuel to the engine
        subtype:  ball_valve  any valve that checks flow by the seating of a ball
        subtype:  butterfly_valve__butterflyvalve  a valve in a carburetor that consists of a disc that turns and acts as a throttle
        subtype:  choke  a valve that controls the flow of air into the carburetor of a gasoline engine
           subtype:  automatic_choke  a choke that automatically controls the flow of air to the carburetor
        subtype:  clack_valve__clackvalve__clack__clapper_valve__clappervalve  a simple valve with a hinge on one side; allows fluid to flow in only one direction
        subtype:  exhaust_valve__exhaustvalve  a valve through which burned gases from a cylinder escape into the exhaust manifold
        subtype:  intake_valve  a valve that controls the flow of fluid through an intake
        subtype:  poppet_valve__poppet  a mushroom-shaped valve that rises perpendicular from its seat; commonly used in internal-combustion engines
        subtype:  safety_valve__relief_valve__escape_valve__escape_cock__escape  a valve in a container in which pressure can build up (as a steam boiler); it opens automatically when the pressure reaches a dangerous level
        subtype:  slide_valve__slidevalve  valve that opens and closes a passageway by sliding over a port
  subtype:  cooling_system__coolingsystem__cooling  a mechanism for keeping something cool; "the cooling was overhead fans"
     subtype:  air-conditioner__airconditioner__air-conditioning__airconditioning  a system that keeps air cool and dry
     subtype:  coolant_system__coolantsystem  a cooling system that uses a fluid to transfer heat from one place to another
     subtype:  cooling_tower__coolingtower  a cooling system used in industry to cool hot water (by partial evaporation) before reusing it as a coolant
     subtype:  evaporative_cooler__evaporativecooler  a cooing system that cools by evaporation
     subtype:  refrigeration_system__refrigerationsystem  a cooling system for chilling or freezing (usually for preservative purposes)
  subtype:  delayed_action__delayedaction  a mechanism that automatically delays the release of a camera shutter for a fixed period of time so that the photographer can appear in the picture
  subtype:  drive.mechanism  a mechanism by which force or power is transmitted in a machine; "a variable speed drive permitted operation through a range of speeds"
  subtype:  drive_line_system__drive_line__driveline  mechanism that transmits power from the engine to the driving wheels of a motor vehicle
  subtype:  film_advance  a mechanism for advancing film in a camera or projector
  subtype:  gear_mechanism__gear  a mechanism for transmitting motion by gears for some specific purpose (as the steering gear of a vehicle)
     subtype:  first_gear__firstgear__first__low_gear__lowgear__low  the lowest forward gear ratio in the gear box of a motor vehicle; used to start a car moving
     subtype:  gearset  a set of gears
     subtype:  high_gear__high  a forward gear with a gear ratio giving high vehicle velocity for a given engine speed
        subtype:  overdrive  a high gear used at high speeds to maintain the driving speed with less output power
     subtype:  park.gear_mechanism  a gear position that acts as a parking brake; "the put the car in park and got out"
     subtype:  reverse  the gears by which the motion of a machine can be reversed
     subtype:  second_gear__second  the gear that has the second lowest forward gear ratio in the gear box of a motor vehicle; "he had to shift down into second to make the hill"
     subtype:  steering_gear  a gear that couples the the steering wheel to the steering linkage of a motor vehicle
     subtype:  third_gear__thirdgear__third  the third from the lowest forward ratio gear in the gear box of a motor vehicle; "you shouldn't try to start in third gear"
     subtype:  transmission_system__transmission  the gears that transmit power from an automobile engine via the driveshaft to the live axle
        subtype:  automatic_transmission__automatictransmission__automatic_drive__automaticdrive  a transmission that automatically changes the gears according to the speed of the car
        subtype:  four-wheel_drive__4WD  a transmission that provides power directly to all four wheels of a motor vehicle
        subtype:  standard_transmission__stick_shift__stickshift  a transmission that is operated manually with a gear lever and a clutch pedal
  subtype:  homing_device  the mechanism in a guided missile that guides it toward its objective
  subtype:  hydraulic_system__hydraulicsystem  a mechanism operated by the resistance offered or the pressure transmitted when a liquid is forced through a small opening or tube
  subtype:  ignition_system__ignition  the mechanism that ignites the fuel in an internal-combustion engine
  subtype:  lock.mechanism  a mechanism that detonates the charge of a gun
  subtype:  mechanical_device  mechanism consisting of a device that works on mechanical principles
     subtype:  bellows__bellow__blower  a mechanical device that blows air onto a fire to make it burn more fiercely
     subtype:  broadcaster.mechanical_device__spreader  a mechanical device for scattering something (seed or fertilizer or sand etc.) in all directions
     subtype:  bumper  a mechanical device consisting of bars at either end of vehicle absorb shock and prevent damage
     subtype:  bumper_guard  vertical bars attached to a bumper to prevent locking bumpers with another vehicle
     subtype:  carburetor__carburettor  mixes air with gasoline vapor prior to explosion
     subtype:  compressor  a mechanical device that compresses gasses
        subtype:  air_compressor__aircompressor  a compressor that takes in air at atmospheric pressure and delivers it at a higher pressure
        subtype:  supercharger  compressor that forces increased oxygen into the cylinders of an internal-combustion engine
     subtype:  copyholder  mechanical device used in printing; holds the copy for the compositor
     subtype:  coupler__coupling  a mechanical device that serves to connect the ends of adjacent objects
        subtype:  clevis  a coupling to attach a drawbar to a plow or wagon or trailer etc.
        subtype:  clutch.coupler  a coupling that connects or disconnects driving and driven parts of a driving mechanism
           subtype:  friction_clutch  a clutch in which one part turns the other by the friction between them
              subtype:  cone_clutch__cone_friction_clutch  a friction clutch in which the frictional surfaces are cone-shaped
              subtype:  disk_clutch  a friction clutch in which the frictional surfaces are disks
              subtype:  slip_clutch__slip_friction_clutch  a friction clutch that will slip with the torque is too great
        subtype:  fluid_drive__fluiddrive  an automotive power coupling
        subtype:  swivel  a coupling (as in a chain) that has one end that turns on a headed pin
        subtype:  universal_joint__universaljoint__universal  coupling that connects two rotating shafts allowing freedom of movement in all directions; "in motor vehicles a universal joint allows the driveshaft to move up and down as the vehicle passes over bumps"
     subtype:  hair_curler__curler__roller__crimper  a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it; "a woman with her head full of curlers is not a pretty sight"
     subtype:  diaphragm.mechanical_device__stop  a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"
        subtype:  iris_diaphragm__iris  diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
     subtype:  dicer  a mechanical device used for dicing food
     subtype:  dildo  a mechanical device that substitutes for an erect penis to provide vaginal stimulation
        subtype:  vibrator.dildo  dildo that has a vibrating tip
     subtype:  electromechanical_device__electromechanicaldevice  a mechanical device that is operated by electricity
     subtype:  escapement  mechanical device that regulates movement
     subtype:  gearshift__gearstick__shifter  a mechanical device for engaging and disengaging gears
     subtype:  hook.mechanical_device__claw  a mechanical device that is curved or bent to suspend or hold or pull something
        subtype:  ground_tackle__anchor  a mechanical device that prevents a vessel from moving
           subtype:  grapnel_anchor__grapnelanchor__grapnel  a light anchor for small boats
           subtype:  mooring_anchor__mooringanchor  an anchor used to hold a mooring buoy or a channel marker in place
           subtype:  mushroom_anchor  an anchor used for semipermanent moorings; has a bowl-shaped head that will dig in however it falls
           subtype:  sheet_anchor__sheetanchor__waist_anchor__waistanchor  spare anchor for use in emergency
        subtype:  pothook  an S-shaped hook to suspend a pot over a fire
           subtype:  trammel.pothook  an adjustable pothook set in a fireplace
        subtype:  tenterhook  one of a series of hooks used to hold cloth on a tenter
     subtype:  simple_machine__machine  a device for overcoming resistance at one point by applying force at some other point
        subtype:  inclined_plane  a simple machine for elevating objects; consists of plane surface that makes an acute angle with the horizontal
           subtype:  ramp__incline  an inclined surface or roadway that moves traffic from one level to another
              subtype:  ski_jump__skijump  a steep downward ramp from which skiers jump
           subtype:  screw.inclined_plane  a simple machine of the inclined-plane type consisting of a spirally threaded cylindrical rod that engages with a similarly threaded hole
           subtype:  wedge  something usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them
              subtype:  ax_head__axe_head__axehead  the cutting head of an ax
              subtype:  colter__coulter  a sharp steel wedge that precedes the plow and cuts vertically through the soil
              subtype:  moldboard__mouldboard  wedge formed by the curved part of a steel plow blade that turns the furrow
              subtype:  plowshare__ploughshare__share  a sharp steel wedge that cuts loose the top layer of soil
              subtype:  coign__quoin__coigne  expandable metal or wooden wedge used by printers to lock up a form within a chase
              subtype:  shim  a thin wedge of material (wood or metal or stone) for driving into crevices
        subtype:  lever.simple_machine  a simple machine that gives a mechanical advantage when given a fulcrum
        subtype:  pulley-block__pulley__block  a simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
           subtype:  bollock__bullock_block__bullockblock  a pulley-block at the head of a topmast
           subtype:  fairlead  a pulley-block used to guide a rope forming part of a ship's rigging to avoid chafing
              subtype:  snatch_block  a pulley-block that can be opened to receive the bight of a rope
           subtype:  idle_pulley__idler_pulley__idlerpulley__idle_wheel  a pulley on a shaft that presses against a guide belt to guide or tighten it
        subtype:  wheel  a simple machine consisting of a circular frame with spokes (or a solid disc) that can rotate on a shaft or axle (as in vehicles or other machines)
           subtype:  balance_wheel__balancewheel  a wheel oscillating against the hairspring of a timepiece to regulate its beat
           subtype:  bicycle_wheel__bicyclewheel  the wheel of a bicycle
           subtype:  buffing_wheel__buffingwheel  a wheel that is covered with soft material
           subtype:  cartwheel.wheel  a wheel that has wooden spokes and a metal rim
           subtype:  car_wheel__carwheel  a wheel that has a tire and rim and hubcap; used to propel the car
              subtype:  fifth_wheel.car_wheel__spare  an extra car wheel and tire
           subtype:  daisy_print_wheel__daisyprintwheel__daisy_wheel__daisywheel  a wheel around which is a set of print characters that make a typing impression on paper
           subtype:  driving_wheel__drivingwheel  a wheel that drives a motor vehicle (transforms torque into a tractive force)
           subtype:  gear_wheel__gear__cogwheel  a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion
              subtype:  bevel_gear__bevelgear__pinionandcrownwheel__pinion_and_ring_gear  gears that mesh at an angle
                 subtype:  differential_gear__differential  a bevel gear that permits rotation of two shafts at different speeds; used on the rear axle of automobiles to allow wheels to rotate at different speeds on curves
              subtype:  escape_wheel  gear that engages a rocking lever
              subtype:  pinion  a gear with a small number of teeth designed to mesh with a larger wheel or rack
                 subtype:  lantern_pinion__lanternpinion__lantern_wheel__lanternwheel  a small pinion having cylindrical bars instead of teeth, used chiefly in inexpensive clocks
              subtype:  planetary_gear__planetarygear__epicyclic_gear__epicyclicgear__planet_wheel__planet_gear  an outer gear that revolves about a central sun gear of an epicyclic train
              subtype:  rack_and_pinion  a wheel gear (the pinion) meshes with a toothed rack; converts rotary to reciprocating motion (and vice versa)
              subtype:  spur_gear__spur_wheel  gear wheels that mesh in the same plane
              subtype:  sun_gear__sungear  the central gear in a epicyclic train
              subtype:  worm_gear  gear consisting of a shaft with screw thread (the worm) that meshes with a toothed wheel (the worm wheel); changes the direction of the axis of rotary motion
              subtype:  worm_wheel  gear with the thread of a worm
           subtype:  grinding_wheel__emery_wheel__emerywheel  a wheel composed of abrasive material; used for grinding
           subtype:  handwheel.wheel  a wheel worked by hand
           subtype:  nosewheel  a wheel located under the nose of an airplane that is part of the plan's landing gear
           subtype:  paddlewheel  a large wheel fitted with paddles and driven by an engine in order to propel a boat
           subtype:  potter's_wheel  a horizontal rotating wheel holding the clay being shaped by a potter
           subtype:  ratchet_wheel__ratchetwheel  toothed wheel held in place by a pawl or detent and turned by a lever
           subtype:  roller.wheel  a small wheel without spokes (as on a roller skate)
              subtype:  caster.roller__castor  a pivoting roller attached to the bottom of furniture or trucks or portable machines to make them movable
           subtype:  toothed_wheel__toothedwheel__roulette  a wheel with teeth for making a row of perforations
           subtype:  rowel  a small spiked wheel at the end of a spur
           subtype:  sprocket_wheel__sprocket  thin wheel with teeth that engage with a chain
           subtype:  trundle  small wheel or roller
           subtype:  wagon_wheel__wagonwheel  a wheel of a wagon
           subtype:  waterwheel__water_wheel__waterwheel  a wheel that rotates by direct action of water; a simple turbine
              subtype:  millwheel  water wheel that is used to drive machinery in a mill
              subtype:  noria  a water wheel with buckets attached to the rim; used to raise water for transfer to an irrigation channel
           subtype:  water_wheel__waterwheel__waterwheel  a wheel with buckets attached to its rim; raises water from a stream or pond
     subtype:  pantograph  mechanical device used to copy a figure or plan on a different scale
     subtype:  piston__plunger  mechanical device that has a plunging or thrusting motion
     subtype:  propeller__propellor  a mechanical device that rotates to push against air or water
        subtype:  airplane_propeller__airscrew__prop  a propeller that rotates to push against air
        subtype:  screw_propeller__screw  a propeller with several angled blades that rotates to push against water or air
        subtype:  variable-pitch_propeller  propeller for which the angle of the blades is adjustable
     subtype:  pump  a mechanical device that moves fluid or gas by pressure or suction
        subtype:  air_pump__airpump__vacuum_pump  a pump that moves air in or out of something
           subtype:  condensation_pump__diffusion_pump__diffusionpump  vacuum pump used to obtain a high vacuum
           subtype:  inflater__inflator  an air pump operated by hand to inflate something (as a tire)
           subtype:  ion_pump__ionpump  a vacuum pump that removes gas by ionizing the atoms or molecules and adsorbing them on a metal surface
        subtype:  aspirator  a pump that draws air or another gas through a liquid
        subtype:  auxiliary_pump__auxiliarypump__donkey_pump  a supplementary pump available if needed
        subtype:  bicycle_pump__bicyclepump  a small pump that fills bicycle tires with air
        subtype:  bilge_pump__bilgepump  a pump to remove bilgewater
        subtype:  centrifugal_pump__centrifugalpump  a pump that use centrifugal force to discharge fluid into a pipe
        subtype:  force_pump__forcepump  pump used to force a liquid up and expel it under pressure
        subtype:  gas_pump__gaspump__gasoline_pump__island_dispenser  a pump in a service station that draws gasoline from underground storage tanks
        subtype:  grease-gun__gun  a hand-operated pump that resembles a gun; forces grease into parts of a machine
        subtype:  hand_pump  a pump worked by hand
        subtype:  heart-lung_machine  a pump to maintain circulation during heart surgery; diverts blood from the heart and oxygenates it and then pumps it through the body
        subtype:  hydraulic_pump__hydraulicpump__hydraulic_ram__hydraulicram  a water pump that uses the kinetic energy of flowing water to force a small fraction of that water to a reservoir at a higher level
        subtype:  lift_pump  pump used to lift rather than force a liquid up
        subtype:  oil_pump__oilpump  a pump that keeps a supply of oil on moving parts
        subtype:  stirrup_pump__stirruppump  a hand-operated reciprocating pump; used in fighting fires
        subtype:  suction_pump__suctionpump  a pump for raising fluids by suction
           subtype:  stomach_pump__stomachpump  a suction pump used to remove the contents of the stomach
           subtype:  sump_pump  a suction pump for removing liquid from a sump
        subtype:  water_pump__waterpump  the pump in the cooling system of an automobile that cause the water to circulate
     subtype:  ratchet__rachet__ratch  mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction
     subtype:  record_changer__auto-changer__changer  an automatic mechanical device on a record player that causes new records to be played without manual intervention
     subtype:  reed  mechanical device consisting of a thin strip of stiff material that is fitted into the mouthpiece of woodwind instruments and that vibrates to produce a tone when air streams over it
        subtype:  double_reed  a pair of joined reeds that vibrate together to produce the sound in some woodwinds
     subtype:  ride  a mechanical device that you ride for amusement or excitement
        subtype:  carousel__carrousel__merrygoround__roundabout__whirligig  large mechanical apparatus with seats for children to ride on
        subtype:  Ferris_wheel  rotating mechanism consisting of a large upright wheel with suspended seats that remain upright as the wheel turns; provides a ride at an amusement park
        subtype:  roller_coaster__big_dipper__bigdipper__chutethechute  elevated railway in an amusement park (usually with sharp curves and steep inclines)
     subtype:  seeder.mechanical_device  a mechanical device that sows grass seed or grain evenly over the ground
     subtype:  shutter.mechanical_device  a mechanical device on a camera that opens and closes to control the time of a photographic exposure
     subtype:  splicer  a mechanical device for joining two pieces of paper or film or magnetic tape
     subtype:  splint  an orthopedic mechanical device used to immobilize and protect a part of the body (as a broken leg)
     subtype:  sprinkler  mechanical device that attaches to a garden hose for watering lawn or garden
     subtype:  stator_coil__stator  mechanical device consisting of the stationary part of a motor or generator in or around which the rotor revolves
     subtype:  stoker  a mechanical device for stoking a furnace
     subtype:  stretcher.mechanical_device  a mechanical device used to make something larger (as shoes or gloves) by stretching it
     subtype:  striker  the part of a mechanical device that strikes something
        subtype:  clapper__tongue  metal striker that hangs inside a bell and makes a sound by hitting the side
        subtype:  firing_pin  striker that ignites the charge by striking the primer
        subtype:  piano_hammer__pianohammer__hammer  a striker that is covered in felt and that causes the piano strings to vibrate
        subtype:  gunlock_hammer__gunlockhammer__hammer  the part of a gunlock that strikes the percussion cap when the trigger is pulled
        subtype:  head.striker  the striking part of a tool; "the head of the hammer"
           subtype:  golfclub_head__club_head  the head of the golf club that strikes the ball
           subtype:  hammerhead  the striking part of a hammer
     subtype:  supply_chamber  a mechanical device for holding something and supplying it as needed
        subtype:  cartridge_holder__cartridgeholder__cartridge_clip__cartridgeclip__clip__magazine  a metal frame or container holding cartridges; can be inserted into an automatic gun
           subtype:  pincurl_clip__pincurlclip  a variety of clip for holding pin curls
        subtype:  magazine.supply_chamber__cartridge  a light-tight supply chamber holding the film and supplying it for exposure as required
     subtype:  swing.plaything  mechanical device used as a plaything to support someone swinging back and forth
        subtype:  trapeze  a swing used by circus acrobats
     subtype:  tone_arm__pickup__pickup_arm  mechanical device consisting of a light balanced arm that carries the cartridge
     subtype:  trap.mechanical_device  a device to hurl clay pigeons into the air for trapshooters
     subtype:  vibrator  mechanical device that produces vibratory motion; used for massage
     subtype:  voting_machine  a mechanical device for recording and counting votes mechanically
     subtype:  weathervane__wind_vane  mechanical device attached to an elevated structure; rotates freely to show the direction of the wind
        subtype:  weathercock  weathervane with a vane in the form of a rooster
        subtype:  wind_tee  weather vane shaped like a T and located at an airfield
     subtype:  wheelwork  mechanical device including an arrangement of wheel in a machine (especially a train of gears)
        subtype:  gearing__gears__gear__geartrain__power_train__powertrain__train  wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain"
           subtype:  epicyclic_train__epicyclictrain__epicyclic_gear_train  a system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis
           subtype:  reduction_gear__reductiongear  gearing that reduces an input speed to a slower output speed
     subtype:  winder  mechanical device around which something can be wound
        subtype:  bobbin__spool__reel  a winder around which thread or tape or film or other flexible materials can be wound
           subtype:  filature  a bobbin used in spinning silk into thread
           subtype:  shuttle  bobbin that passes the weft thread between the warp threads
        subtype:  reel.winder  winder consisting of a revolving spool with a handle; attached to a fishing rod
     subtype:  winder.mechanical_device__key  mechanical device used to wind another device that is driven by a spring (as a clock)
        subtype:  watch_key__watchkey  winder consisting of a key with a square hole; used for winding some watches
     subtype:  windshield_wiper__windscreen_wiper__wiper__wiper_blade  a mechanical device that cleans the windshield
  subtype:  radiator.mechanism  a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan
  subtype:  rotating_mechanism  a mechanism that rotates
     subtype:  blade.rotating_mechanism__vane  flat surface that rotates and pushes against air or water
        subtype:  fan_blade__fanblade  blade of a rotating fan
        subtype:  impeller  the blade of a rotor (as in the compressor of a jet engine)
        subtype:  paddle.blade  a blade of a paddle wheel or water wheel
        subtype:  rudder_blade  the vertical blade on a rudder
     subtype:  cam  a rotating disk shaped to convert circular into linear motion
        subtype:  distributor_cam__distributorcam  the cam inside the distributor that rotates to contact spark plug terminals in the correct order
     subtype:  circle.rotating_mechanism__round  any circular or rotating mechanism; "the machine punched out metal circles"
        subtype:  disk__disc  a thin flat circular plate
           subtype:  acetate_disk__acetatedisk__phonograph_recording_disk  a disk coated with cellulose acetate
           subtype:  brake_disk__brakedisk  the brake disk plate is fixed to the wheel; pressure is applied to it by the brake pads
           subtype:  diaphragm  electro-acoustic transducer that vibrates to receive or produce sound waves
           subtype:  discus.disk__saucer  a disk used in throwing competitions
           subtype:  Frisbee  (trademark) a light plastic disk about 10 inches in diameter; sailed with a flip of the wrist for recreation or competition
           subtype:  planchet__coin_blank  a flat metal disk ready for stamping as a coin
           subtype:  hockey_puck__puck  a vulcanized rubber disk 3 inches in diameter that is used instead of a ball in ice hockey
           subtype:  token  a metal or plastic disk that can be used (as a substitute for coins) in slot machines
              subtype:  subway_token  a token that is used to pay for entry to the subway system
     subtype:  Ferris_wheel  rotating mechanism consisting of a large upright wheel with suspended seats that remain upright as the wheel turns; provides a ride at an amusement park
     subtype:  gyroscope__gyro  rotating mechanism in the form of a universally mounted spinning wheel that offers resistance to turns in any direction
     subtype:  rotor  rotating mechanism consisting of an assembly of rotating airfoils; horizontal rotors on a helicopter or compressor rotors of a jet engine
        subtype:  main_rotor  rotor consisting of large rotating airfoils on a single-rotor helicopter that produce the lift to support the helicopter in the air
        subtype:  tail_rotor__anti-torque_rotor  rotor consisting of a rotating airfoil on the tail of a single-rotor helicopter; keeps the helicopter from spinning in the direction opposite to the rotation of the main rotor
  subtype:  steering_linkage  mechanism consisting of a system of rods and levers connected to the front wheels of a motor vehicle; the steering gear pushes the steering linkage left or right which swivels the front wheels causing the vehicle to turn
  subtype:  steering_system__steering_mechanism  a mechanism by which something is steered (especially a motor vehicle)
     subtype:  helm.steering_system  steering mechanism for a vessel; a mechanical device by which a vessel is steered
        subtype:  wheel.helm  a circular helm to control the rudder of a vessel
     subtype:  power_steering__powersteering__powerassistedsteering  automotive steering where engineer power amplifies the torque applied to the steering wheel
     subtype:  rudder.steering_system  (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel
  subtype:  tape_drive__tape_transport__transport  a mechanism that transport magnetic tape across the read/write heads of a tape playback/recorder
  subtype:  whirler  a revolving mechanism
  subtype:  works__work__workings  the internal mechanism of a device

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