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The Door cam is the device used on some elevators (possibly not often seen on automatic door elevators) that pushes the interlock roller, causing the interlock to release, and allow the doors to open. The device is mounted to the elevator car. There are 2 types of door cams. Fixed cams are stationary. Retiring cams horizontally move, and retract when the elevator is moving. Fixed cams are likely usually used on elevators serving only a few floors, and retiring cams are likely used on elevators serving more than a few floors.

Gallery

Retiring Cam in Action00:27

Retiring Cam in Action

Retiring cam on swing door elevator

Elevator 

Drive systems: Traction • Winding Drum • Hydraulic


Types of elevators: Double DeckDumbwaiterFireman'sFreightIncline • PassengerResidentialWheelchair lift


Concept: Destination dispatchElevator algorithm • Elevator control systemElevator machine room • Elevator maintenanceElevator major alterationsElevator modernizationMachine room less elevator


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

Schindler lifts (Dewhurst fixtures 2) "This elevator only serves two floors."
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