Illumination – Self powered lamp – With movable focusing element
Patent
1995-12-12
1996-10-01
Dority, Carroll B.
Illumination
Self powered lamp
With movable focusing element
362203, F21L 700
Patent
active
055607055
ABSTRACT:
A multi-function lighting device includes a barrel for housing a battery therein, a lamp base mounted in an externally threaded end of the barrel, a lamp provided on the lamp base, a switch unit disposed in the barrel for connecting selectively and electrically the battery to the lamp, and a head assembly. The head assembly includes a tubular coupling member which is threaded internally to engage threadably the barrel and which is provided with an inward push projection, a tubular sleeve member which is made of a light transmittable material and which is sleeved slidably on the coupling member, and a head cap which is secured to one end of the sleeve member and which is provided with a reflector therein. The sleeve member is shiftable with respect to the coupling member between a first position, wherein the lamp extends into the reflector so that light may be directed axially, and a second position, wherein the lamp is located in the sleeve member so that light can pass transversely through the sleeve member. The coupling member is shiftable with respect to the barrel so as to cause the push projection to depress the switch unit and control operation of the lamp.
REFERENCES:
patent: 2218678 (1940-10-01), Hoffman
patent: 5213408 (1993-05-01), Shiau
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