Hand held flashlight with selective beam and enhanced apparent b

Details Hand held flashlight with selective beam and enhanced apparent b Hand held flashlight with selective beam and enhanced apparent b

1989-07-19

1991-01-08

Husar, Stephen F.

Illumination

Self powered lamp

With movable focusing element

362280, 362304, 362349, F21L 1502

Patent

active

049841408

ABSTRACT:
This invention produces a spot beam or a broad beam having no unilluminated regions within the beam. In one case, the size of the beam is established by the relative position of the light bulb and a uniquely shaped reflector. The apparaent brightness of the beam is established by oscillating the beam in a controlled fashion. In another case, both the size of the beam and the apparent brightness are established by oscillating the beam in a controlled fashion. The result of this invention is a spot beam that can be made into a broad beam without the dark regions that result from the existing adjustment techniques and also a broad beam having an apparent brightness greater than that attainable by other techniques.

REFERENCES:
patent: 2947851 (1960-08-01), Lozeau
patent: 4807097 (1989-02-01), Gammache

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