#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"
  supertype:  mechanism  device consisting of a piece of machinery; has moving parts that perform some function
  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

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