Closure fasteners – Bolts – Multiple
Patent
1990-11-19
1992-03-17
Moore, Richard E.
Closure fasteners
Bolts
Multiple
E05C 106
Patent
active
050962388
ABSTRACT:
A locking system for a door for use in conjunction with a commonly available locking mechanism has an interconnecting rod attached to one end of the primary sliding bolt of the locking mechanism, and at the other end to a pivoted link. A draw bar extends from the pivoted link to other pivoted links that are each attached to an additional sliding bolt. As the primary sliding bolt is extended outwardly from the edge of the door via the locking mechanism, the interconnecting rod communicates this motion via the pivoted links and draw bar to each of the other sliding bolts, thereby causing these sliding bolts to extend from the edge of the door in a like manner. Similarly, as the primary sliding bolt is retracted, the reverse process occurs and the secondary sliding bolts retract into the edge of the door. As this system ultilizes a pre-existing locking mechanism mounted in a standard location on the door, a conventional door locking mechanism augmented by the secondary locking system of the present invention becomes strengthened while advantageously remaining inconspicuous.
REFERENCES:
patent: 824545 (1906-06-01), Hubermann
patent: 1513835 (1924-11-01), Lovell
patent: 3970340 (1976-07-01), Taft
patent: 4046410 (1977-09-01), Connell
patent: 4288944 (1981-09-01), Donovan
patent: 4534192 (1985-08-01), Harshbarger et al.
patent: 4823510 (1989-04-01), Amos
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