Elevator rotary lost door interlock

Details Elevator rotary lost door interlock Elevator rotary lost door interlock

1992-02-25

1993-04-20

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 62, 187 65, B66B 100

Patent

active

052034313

ABSTRACT:
An elevator door interlock has a camming surface which is in contact with a lead of an electrical circuit during normal operation and has a bridge thereon. The interlock rotates the camming surface along the lead to contact the bridge if an elevator door is locked, to not contact the lead if the elevator door is not locked, and to rotate the camming surface out of contact with the leads if the door is missing.

REFERENCES:
patent: 978269 (1910-12-01), Collier
patent: 1453551 (1923-05-01), Fogal
patent: 2060283 (1936-11-01), Cullmer
patent: 2378218 (1945-06-01), Hard
patent: 3292737 (1966-12-01), Crispen et al.
patent: 4483420 (1984-11-01), Byrne

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