Illumination – Self powered lamp – With movable focusing element
Patent
1987-10-13
1989-06-27
Husar, Stephen F.
Illumination
Self powered lamp
With movable focusing element
362205, 362207, 200 60, F21L 1502
Patent
active
048435260
ABSTRACT:
An adjustable focus flashlight comprising three units: a head, a replaceable switch unit, and a battery unit. The replaceable switch unit includes a switch assembly having two holes in one end for bulb leads, and a holder near that end for storing a spare bulb. The replaceable switch unit also includes a cylindrical member around the switch assembly, which is externally threaded, at the end near the holes, to engage the internal threads of the head, and adjust the focus. A flexible sleeve fits around the outer surface of the cylindrical member, the sleeve having a circular protrusion formed in the end thereof, to frictionally engage part of the head, and maintain a selected focus adjustment.
REFERENCES:
patent: D263170 (1982-02-01), Maglica
patent: 3162376 (1964-12-01), Furuya
patent: 3798440 (1974-03-01), Brindley
patent: 3963886 (1976-06-01), Yen
patent: 4250446 (1981-02-01), Ponte
patent: 4286311 (1981-08-01), Maglica
patent: 4398238 (1983-08-01), Nelson
patent: 4527223 (1985-07-01), Maglica
patent: 4530039 (1985-07-01), Shin-shi
patent: 4577263 (1986-03-01), Maglica
patent: 4722036 (1988-01-01), Hastings
Mini-Maglite Brochure, Pub. Prior to 12/4/86.
Streamlite Brochure, Pub. Prior to 12/4/86.
"Let's Take the Bull Out of Switches", G. T. Price Products Advertisement , 3/85.
Cole Richard R.
Husar Stephen F.
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