Vehicle door lock for limiting door opening to specified vehicle

Details Vehicle door lock for limiting door opening to specified vehicle Vehicle door lock for limiting door opening to specified vehicle

1980-10-27

1982-12-21

Tollberg, Stanley H.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 61, 49116, B66B 1300

Patent

active

043644546

ABSTRACT:
A locking mechanism, for the doors of an elevator car, which is disabled when the car is within a short distance from a landing but which otherwise permits the doors to be opened by an amount insufficient for a passenger to exit from the car and then locks the doors with respect to further opening movement. In the preferred form, a door carries a notched plate, and a latch bolt on a part of the car which is stationary relative to the door is controlled by an arm engageable with spaced cams in the hoistway so that the bolt will enter the notch of the plate when the car is away from a landing and the doors are partially opened.

REFERENCES:
patent: 1035174 (1912-08-01), Edes
patent: 1119001 (1914-12-01), Beardslee
patent: 1284554 (1918-11-01), Armstrong
patent: 1959042 (1934-05-01), Staley
patent: 1961938 (1934-06-01), Norton
patent: 2003399 (1935-06-01), Tamsitt
patent: 3056470 (1962-10-01), Moser et al.
patent: 3625312 (1971-12-01), Hutner
patent: 3912049 (1975-10-01), Holland et al.

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