Portable door lock closure

Details Portable door lock closure Portable door lock closure

1992-06-22

1993-04-20

Moore, Richard E.

Locks

Parts, attachments, accessories and adjuncts

For key-operated mechanism

70428, 70424, 70211, 292DIG2, E05B 1718, E05B 1300

Patent

active

052031870

ABSTRACT:
The present doorlock closure secures existing doors having conventional doorknobs against entry by enveloping the doorknob with opposed cavity compartments of knob confining segments. Upper and lower housing segments are hinged together such that they may mount elements which form a cam-lever, segment interlocking assembly. The assembly includes a spring-loaded latch and lockable latch lever in the upper segment and a corresponding cam latch release in the lower segment. The housing segments themselves are hinged together for facile clamping upon the doorknob of a door, securing it against entry by persons having a passkey to the doorknob which retains a turnkey lock therein.

REFERENCES:
patent: 901409 (1908-10-01), Woolums
patent: 1221354 (1917-04-01), Mitchell
patent: 1404263 (1922-01-01), Bludworth
patent: 2131060 (1938-09-01), Malluk
patent: 2469973 (1949-05-01), Malluk
patent: 2785564 (1957-03-01), Rossi
patent: 3245240 (1966-04-01), DeForrest
patent: 3636742 (1972-01-01), Raney
patent: 3952564 (1976-04-01), Maines
patent: 4254888 (1981-03-01), Chandler
patent: 4561273 (1985-12-01), Robinson
patent: 4798069 (1989-01-01), DeForrest, Sr.

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