Security lock for door

Details Security lock for door Security lock for door

1980-11-13

1983-02-22

Moore, Richard E.

Closure fasteners

Extension link

Slotted bar

E05C 304, E05C 1718

Patent

active

043745997

ABSTRACT:
A first stationary flange is supported from the free swinging edge of a door and projects outwardly of the opening side of the door. A second pivoted flange is mounted from the doorjamb opposing the stationary flange and is swingable, about an axis generally paralleling the axis of pivotal movement of the door, between an operative position paralleling and closely opposing the stationary flange and a retracted position disposed normal to and projecting away from the stationary flange. The stationary flange includes a stop pin projecting toward the second flange and the latter includes openings spaced therealong in which the pin may be selectively engaged to lock the door against swinging movement. The pin is retractable away from the pivoted flange and the latter is mounted for limited shifting along its pivot axis. The pivoted flange is free to swing between its operative and retracted positions when in a first limit position and locked against swinging from the operative position toward the retracted position when in the second limit position. The stationary flange additionally includes laterally projecting guide slidingly received in a longitudinal slot in the stationary flange. Engagement of the guide within the slot of the pivoted flange prevents movement of the pivoted flange from the second limit position to the first limit position.

REFERENCES:
patent: 351147 (1886-10-01), Adams
patent: 3265425 (1966-08-01), Berger

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