Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1985-05-02
1987-02-17
Duncanson, Jr., W. E.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 502
Patent
active
046432760
ABSTRACT:
A traction elevator system having an elevator car and a counterweight. Counterweight derailment, such as due to an earthquake, is detected via a vertically oriented wire strung tautly in the hoistway, a metallic ring on the counterweight which encircles the wire, control connected to the wire for detecting contact between the ring and wire, and a switch on the counterweight which enables the control to detect contact between the ring and wire only after predetermined abnormal horizontal movement of the counterweight.
REFERENCES:
patent: 4056169 (1977-11-01), Showalter
Duncanson Jr. W. E.
Lackey D. R.
Westinghouse Electric Corp.
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