Remote storage and reset of elevator overspeed switch
AssigneeOtis Elevator Company
InventorsChris Pietrzykowski, Gerard Sirigu, Richard N. Fargo, Randy G. Henley, Helmut Schröder-Brumloop, Gurumurthi Ravishankar
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Abstract
An elevator overspeed system designed to work as a governor includes a first switch responsive to an overspeed condition and a second, remotely located switch responsive to said first switch. An overspeed elevator control procedure is initiated when one of the first or second switches are tripped. The first switch is automatically re-set after the second switch is tripped. The second switch is manually re-set to re-start the elevator system in normal operation mode.
Claims7
An overspeed switch system for an elevator system, said switch system comprising
- speed detection means for detecting elevator car speed;
- first switch means tripped by said speed detection means detecting an elevator car speed that exceeds a predetermined speed;
- second switch means tripped in response to tripping by said first switch means, whereby said elevator system is rendered inoperable until said first switch and said second switch are returned to untripped positions;
- and
- automatic switch re-set means for re-setting said first switch means after tripping of said second switch means.
A method of performing an overspeed control procedure for an elevator system, said method comprising
- detecting an overspeed condition of an elevator car;
- tripping a first switch in response to said overspeed condition:
- tripping a second switch in response to the tripping of said first switch, wherein the tripping of one of said first switch or said second switch activates an overspeed condition mode;
- and
- automatically re-setting said first switch after said second switch is tripped.
Dependencies are inferred from the claim text.