Keyhole illuminating apparatus

Details Keyhole illuminating apparatus Keyhole illuminating apparatus

1979-11-02

1981-07-28

Jordan, Charles T.

Illumination

Door knob or keyhole illuminator

362203, 362205, 362206, E05B 1710

Patent

active

042813689

ABSTRACT:
Disclosed is a tubular housing having a threaded-base lamp bulb at one end and a "penlite" battery within the housing with its positive terminal stud separated from the bulb's positive terminal by a helical compression spring. The spring coils receive the lamp base and the spring is bottomed and centered in an annular retainer disc encircling the positive terminal stud of the battery. A conductive strap engages the endmost coil of the spring and extends the length of the battery to its base providing electrical continuity from the battery negative terminal to the bulbs threaded base. A push button, accessible at the end of the housing, moves the battery so that its positive terminal engages the positive terminal of the bulb.

REFERENCES:
patent: 1404259 (1922-01-01), Alschuler
patent: 1472088 (1923-10-01), Puckett
patent: 2070316 (1937-02-01), Recker
patent: 2699490 (1955-01-01), Reap
patent: 2732480 (1956-01-01), Wells
patent: 2765396 (1956-10-01), Iverson
patent: 3071747 (1963-01-01), Moore
patent: 3679886 (1972-07-01), Pizzey
patent: 3856609 (1974-12-01), Maas
patent: 4173035 (1979-10-01), Hoyt
patent: 4178712 (1979-12-01), Williams
patent: 4742207 (1973-06-01), Strauss

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