Emergency control system for elevators
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United States of America Patent
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-
Sep 1, 1987
Grant Date -
N/A
app pub date -
Apr 10, 1986
filing date -
Apr 10, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An emergency control system for an elevator has a circuit for producing a signal in response to a relatively small vibration of a structure in which the elevator is installed; a first circuit responsive to the signal for controlling the operation of the elevator under a predetermined mode for a first predetermined time interval; and a second circuit for disabling the signal producing circuit simultaneously with the start of operation of the first circuit and enabling the signal producing circuit for a second predetermined time interval longer than the first predetermined time interval.
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