Illumination – Door knob or keyhole illuminator
Patent
1994-02-15
1995-03-14
Husar, Stephen F.
Illumination
Door knob or keyhole illuminator
315 84, E05B 1710
Patent
active
053981758
ABSTRACT:
An illuminated locking doorknob apparatus for a door has a door locking set. The door locking set has a knob and lock retaining mechanism that passes through the door. A lock core is removingly and rotatingly secured within the knob and lock retaining mechanism. At least one knob is releasingly secured to the knob and lock retaining mechanism. A keyhole, in the lock core, is accessible through a first port in a wall of the knob. An illumination circuit is within the door locking set. The illumination circuit has a removable DC power source and a removable DC light source in the circuit. The light source is adjacent the keyhole and the light source protrudes through a second port in the wall of the knob to illuminate the keyhole so that a key may be more easily inserted therein. There is a switch in the illumination circuit. The switch has a stationary contact and a sliding contact rod, connected to and actuated by the knob, springingly biased away from the stationary contact. There is a light diffusing directional lens, releasably connected to the wall of the knob, over the light source to protect the light source and to assist in placing light upon the keyhole.
REFERENCES:
patent: 1929741 (1933-10-01), Hall et al.
patent: 1985483 (1934-12-01), Clarke
patent: 2029002 (1936-01-01), Smiley
patent: 3280321 (1966-10-01), Overesch
patent: 3719821 (1973-03-01), Foreman
patent: 3955075 (1976-05-01), Susedik
patent: 4475067 (1984-10-01), Rowe
patent: 4777570 (1988-10-01), Littles
patent: 5057975 (1991-10-01), Evigan
Cariaso Alan B.
Husar Stephen F.
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