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US 12,157,657 B2Granted
Emergency stop system for elevator
AssigneeOtis Elevator Company
InventorsEzhil Nanjappan, Andrew S. Bierer
Life of this patent
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Abstract
Disclosed is an elevator system having: a holding relay configured to energize and deenergize a circuit, the holding relay configured to communicate over a wireless network with a mobile device, wherein the holding relay is configured to: deenergize the circuit responsive to receiving a first signal via the wireless network from the mobile device, indicative of the mobile device being in or near a first architectural location.
Claims4
An elevator system comprising:
- a hoistway having a pit;
- an elevator car configured to move in the hoistway;
- an elevator car controller that controls the elevator car;
- a circuit operationally coupled to the car controller, wherein the controller is configured to stop the elevator car upon sensing a power loss in the circuit;
- a holding relay configured to energize and deenergize the circuit;
- a mobile phone that is configured to determine when it is in or near the hoistway pit;
- wherein the holding relay configured to:
- pair with the mobile phone over a wireless network;
- receive a first signal from the mobile phone, after pairing, with instructions to de-energize the circuit when the mobile device determines that it is in or near the hoistway pit;
- and
- deenergize the circuit responsive to receiving the first signal via the wireless network from the mobile phone.
8 more elements
Dependencies are inferred from the claim text.