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Deadman control or Deadman Switches can either be buttons (also known as Constant pressure control) or a car switch (spring loaded crank).

How it works

For deadmans control with buttons, the buttons has to be held at all time, if the button is not being pressed the elevator will stop, the call buttons work the same way. For the crank elevators  the crank has to be turned to a direction to go up or down , if the crank gets let go the crank will return to the default position and the elevator will stop, when the call buttons are pressed it does not really call the elevator,what is does is make a light (or something else) on a panel inside the elevator letting the elevator operator to go to the floor where the elevator has been called.

Gallery

Video

VINTAGE Manually-Controlled OTIS Traction Freight Elevator @ 153 W. 108th St

VINTAGE Manually-Controlled OTIS Traction Freight Elevator @ 153 W. 108th St. Parking, New York, NY

How it works

Elevator 

Drive systems: Traction • Winding Drum • Hydraulic


Types of elevators: Double DeckDumbwaiterFireman'sFreightIncline • PassengerResidentialWheelchair lift


Concept: CapacityDestination dispatchElevator algorithm • Elevator control systemElevator machine room • Elevator maintenanceElevator major alterationsElevator modernizationMachine room less elevatorRated speed


Elevator systems, controllers and equipments: Elevator fixtures • Elevator keys • Elevator special modesElevator doorsDoor camDoor interlocks (Interlock wiring communication system) • Door restrictorElevator Inspection CertificateEmergency stop buttonFloor designatorsGate switch • Old Deadman controls • Overspeed governorMotor-generator set & Silicon-controlled rectifier (for DC-powered elevators) • Insulated-gate bipolar transistor (for AC-VVVF-powered elevators) • Regenerative converter (for AC-VVVF-powered elevators)


See also: List of elevator fixtures guide • List of elevator and escalator companies • Elevator door sill guide (Generic elevator component door sill guide) • Floor numbering (Unlucky floor numbers) • Elevator incidents and accidents