Apparatus for illuminating a keyhole

Details Apparatus for illuminating a keyhole Apparatus for illuminating a keyhole

1991-02-19

1991-10-15

Husar, Stephen F.

Illumination

Door knob or keyhole illuminator

362184, 362234, E05B 1710

Patent

active

050579754

ABSTRACT:
A retrofittable apparatus for illuminating the face of a lock comprised of an annular outer housing with an aperture which receives the lock cylinder such that when the cylinder's face is within the outer housing a gap is formed between a housing front wall and the cylinder front face. An annular body having an aperture accepts the lock cylinder such that a shoulder of the body engages a lock cylinder flange. A lamp illuminates the face of the lock cylinder through the gap when a switch is closed. In the preferred embodiment the outer housing forms part of the electrical path from the battery supply to the lamp.

REFERENCES:
patent: 500026 (1893-06-01), Morey
patent: 2242626 (1941-05-01), Silker
patent: 2309840 (1943-02-01), Garvert et al.
patent: 2676244 (1954-04-01), Dittman
patent: 3590234 (1971-06-01), Bartick
patent: 3719821 (1973-03-01), Foreman
patent: 4234909 (1980-11-01), Cotroneo
patent: 4295052 (1981-10-01), Jochmann et al.
patent: 4310873 (1982-01-01), Bean
patent: 4745527 (1988-05-01), Belverio, Jr. et al.
patent: 4777570 (1988-10-01), Littles

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