Illumination – Self powered lamp – With movable focusing element
Patent
1991-03-22
1992-12-15
Lazarus, Ira S.
Illumination
Self powered lamp
With movable focusing element
362158, 362183, 362205, 362207, F21L 700, F21L 900
Patent
active
051710862
ABSTRACT:
In a first embodiment, a combination "ON", "OFF" and "DIRECTIONAL SWITCH" operates to turn the light the light on and off and operate a electric motor to drive the lamp longitudinally to facilitate a change of light beam focal length. In a second embodiment, a combination "ON", "OFF" and "DIRECTIONAL SWITCH" operates to turn the light on and off and to manually translate the light bulb longitudinally to facilitate a change of light beam focal length. In both of the embodiments the beam focal length is adjustable through an infinite number of positions between maximum and minimum translation limits and the flashlight maintains the selected light beam focal length until a different light beam focal length is selected. In each embodiment a replacement bulb is contained within the body of the flashlight and is external removable therefrom.
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Gilliam Frank D.
Lazarus Ira S.
Quach Y.
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