Illumination – Self powered lamp – Cylindrical flashlight casing
Patent
1991-09-13
1992-10-27
Lazarus, Ira S.
Illumination
Self powered lamp
Cylindrical flashlight casing
362189, 362205, 362206, 439245, 439840, 200 60, F21L 700
Patent
active
051583577
ABSTRACT:
A battery powered pocket flashlight has a noncorrosive and electrically nonconductive case containing a restrictive aperture for the projection of light from the lamp source and a resilient color filter attached externally upon the end of the case by integral stub axles extending inward into the case for an axis of rotation intersecting perpendicular to the longitudinal axis of the flashlight for operation by the user in the selection of unfiltered light of the lamp source or a light at a color of the visible spectrum of colors. The filter is secured to the case by resilience of the filter material and by its shape in the form of an acute sector of a sphere. The electrical subsystem is completely removable from the case for servicing. The flashlight is controlled by compression of a conical helical spring conductor having coiled turns that collapse under compression upon the negative return surface of the battery for switching current to the lamp bulb through a one piece conductor that includes the switching helical spring plus a conductor extending past the batteries to an integral holder for the lamp bulb. A nonconducting pocket clip and combined switch actuator is movable axially to the case for compression of the helical switching spring.
REFERENCES:
patent: 2818499 (1957-12-01), Moore
patent: 4150330 (1979-04-01), Hudson et al.
patent: 4417299 (1983-11-01), Rupp
patent: 4479351 (1984-01-01), Petzl et al.
patent: 4517628 (1985-05-01), McDermott
Hagarman Sue
Lazarus Ira S.
Osborne, Sr. Eugene F.
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