Lock device

Details Lock device Lock device

1975-07-14

1976-10-05

Moore, Richard E.

Closure fasteners

Extension link

Slotted bar

49163, 49394, 292150, 292277, E05C 104

Patent

active

039841375

ABSTRACT:
A security lock which secures a building entrance against unauthorized entry by linking together the outer and inner doors against their respective door frame stops. This invention comprises link members wherein one member thereof is anchored to the outer door and the other member is a hinged link which passes through the inner door and is prevented from being withdrawn by a manually operated latch. When the security lock is not in use, the hinged link is pivoted out of the way.

REFERENCES:
patent: 650006 (1900-05-01), Haas
patent: 934180 (1909-09-01), Jenks
patent: 1544387 (1925-06-01), Fulton
patent: 2034171 (1936-03-01), Barrett

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