Twist switch for flashlight

Details Twist switch for flashlight Twist switch for flashlight

1991-02-08

1992-06-16

Lazarus, Ira S.

Illumination

Self powered lamp

Cylindrical flashlight casing

362205, 362206, F21L 700

Patent

active

051229382

ABSTRACT:
A twist switch is shown for a flashlight of the type having a conductive tubular body having an interior, opposing ends and an internal shelf formed at one of the opposing ends. The internal shelf has a bulb receiving opening and a reflector is mounted on the internal shelf. A bulb is inserted into the tubular body having a shoulder contact which rests on the internal shelf and a base contact which passes through a bulb receiving opening in the internal shelf. A dry cell battery is stationarily positioned within the interior of the tubular body and has a center terminal in electrical contact with the bulb base contact. An end cap is rotatably engaged on the end of the tubular body opposite the reflector. A conductor element located within the interior of the end cap is initially separated from the tubular body by an insulating member. Turning the end cap moves the end cap in the direction of the reflector end of the flashlight and causes the conductor element to contact the tubular body to complete and electrical circuit through the bulb, tubular body and battery.

REFERENCES:
patent: 1934214 (1933-11-01), Stimson
patent: 1955511 (1934-04-01), Muros
patent: 2619559 (1952-11-01), Schenkel
patent: 2677022 (1954-04-01), Fleming
patent: 4135230 (1979-01-01), Armbruster
patent: 4905129 (1990-02-01), Sharrah
patent: 4949231 (1990-08-01), Wang
patent: 5006969 (1991-04-01), Lai

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