Door jamb reinforcing plate

Details Door jamb reinforcing plate Door jamb reinforcing plate

1976-07-28

1977-11-08

Moore, Richard E.

Closure fasteners

Keepers

52211, 49504, E05C 2100

Patent

active

040572757

ABSTRACT:
An elongated metal plate for fastening to the back of a wooden door jamb with a plurality of fastenings including an angled side of the plate recessed into the jamb, another angled penetrating side driven into the jamb, and a plurality of screws driven through the metal plate intermediate the recessed and penetrating sides. The fastenings are longitudinally and transversely spaced apart to provide maximum reinforcing strength without a concentration of the plurality of fastenings sufficient to weaken the wooden jamb where its bulk has been reduced by hollowing to receive a latch bolt. After the metal plate has been fastened to the back of the jamb, the jamb is fixed to blocking structure of a doorway with the metal plate therebetween and out of reach of tampering. As reinforced by a locked door in the doorway, the whole jamb must be broken transversely against its wood grain in order to force the door.

REFERENCES:
patent: 1086036 (1914-02-01), Ellis
patent: 3338008 (1967-08-01), Sklar
patent: 3918207 (1975-11-01), Aliotla
patent: 3967845 (1976-07-01), Governale

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