Remote-operated elevator door safety control

• US 5,964,319 A
• Filed: 02/26/1998
• Issued: 10/12/1999
• Est. Priority Date: 06/04/1997
• Status: Expired due to Fees

• Current Assignee: Alison E. Weingarden
• Original Assignee: Alison E. Weingarden
• Inventors: Weingarden, Alison E.
• Primary Examiner(s): Noland, Kenneth W.
• Application Number:
  US09/031,164
• Time in Patent Office: 593 Days
• Field of Search: 187/314, 187/316, 187/324, 187/334, 49/116, 49/120
• US Class Current: 187/314
• CPC Class Codes: B66B 13/143 electrical

Abstract

A remote-operated elevator door safety control for holding open a door of an elevator from a remote location includes a transmitter remote from the elevator for selectively transmitting a door-open signal, a receiver at the elevator for receiving the door-open signal, and an actuator coupled with the receiver and responsive to the door-open signal to hold a door-operating mechanism in a door-open mode so as to hold the door open in response to reception of the door-open signal.

Claims

1. A remote-operated elevator door safety control for holding open a door of an elevator from a remote location, the elevator door having a door-operating mechanism for actuation between a door-open mode and door-close mode to move the door selectively to an open position and to a closed position, respectively, and a door-open switch for selectively holding the door-operating mechanism in the door-open mode, the safety control comprising:

a transmitter remote from the elevator for selectively transmitting a door-open signal;

a receiver at the elevator for receiving the door-open signal; and

an actuator coupled with the receiver and responsive to the door-open signal to hold the door-operating mechanism in the door-open mode in response to reception of the door-open signal.

2. The invention of claim 1 wherein the transmitter is a radio frequency transmitter and the receiver is a radio frequency receiver.

3. The invention of claim 1 wherein the actuator is constructed to maintain the door-operating mechanism in the door-open mode during reception of the door-open signal and returns the door-operating mechanism to the door-close mode upon discontinuance of the reception of the door-open signal.

4. The invention of claim 1 wherein the actuator includes a relay responsive to the door-open signal, the relay including a switch in parallel with the door-hold switch for holding the door-operating mechanism in the door-open mode independent of the door-hold switch.

5. The invention of claim 4 wherein the transmitter is a radio frequency transmitter and the receiver is a radio frequency receiver.