Illumination – Self powered lamp – With movable focusing element
Patent
1984-05-18
1985-07-02
Lechert, Jr., Stephen J.
Illumination
Self powered lamp
With movable focusing element
200 60, 362158, 362184, 362186, 362205, 362295, F21L 700, F21V 2304
Patent
active
045272239
ABSTRACT:
An improved flashlight is disclosed which includes an improved mechanism for selectively varying the light beam intensity and area of illumination, an improved switch means, an improved light bulb and light bulb holder, and an improved manner of retaining dry cell batteries within said flashlight. The mechanism includes a double cam notch in a reflector support and abutting cam follower rotates cooperatively attached to a bulb holder to enable movement of the bulb forwardly and rearwardly relative to the light reflector through rotation of the head of the flashlight. The light bulb is configured to have a double pin electrical connection which plugs into a double socket thereby enabling the bulb and holder to have a smaller diameter encapable of passing through a smaller hole formed within the reflector. The switch is of the rotary type which wipes the contacts clean on rotation to enhance electrical conductivity. The batteries are held within the battery casing so that the front, center contact of the forward battery enters into a recessed area in contact with a spring loaded contact follower, with the front shoulder of the forward battery resting against the switch housing, thereby precluding battery cave-in and enhancing the rigidity with which the dry cell batteries are held within the flashlight.
REFERENCES:
patent: 1823762 (1931-09-01), Rathman
patent: 2338078 (1943-12-01), Wood
patent: 4286311 (1981-08-01), Maglica
Lechert Jr. Stephen J.
Locker Howard J.
Mag Instrument Inc.
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