Illumination – Self powered lamp
Reexamination Certificate
1999-10-05
2001-03-27
Tso, Laura K. (Department: 2875)
Illumination
Self powered lamp
C362S204000
Reexamination Certificate
active
06206539
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a flashlight, and more particularly to such a flashlight, which has adjustment means for adjusting the focal length of the lamp bulb.
The focal length of a regular flashlight is adjusted by rotating the rim on the lamp case to move the lens relative to the lamp bulb. This focal length adjustment procedure must be performed with both hands, i.e., with one hand holding the barrel of the flash light, and the other hand rotating the rim on the lamp case.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a flashlight, which has a focal length adjustment device that can be conveniently operated with one hand to adjust the focal length of the lamp bulb. It is another object of the present invention to provide a flashlight, which has a focal length adjustment device that can be operated with one hand to adjust the focal length of the lamp bulb steplessly. It is still another object of the present invention to provide a flashlight, which has water-sealing means to provide the internal circuit.
REFERENCES:
patent: 2107599 (1938-02-01), Chan
patent: 2124153 (1938-07-01), Scholtes
patent: 5171086 (1992-12-01), Baloochi
patent: 5282116 (1994-01-01), Shiau
Rosenberg , Klein & Lee
Tso Laura K.
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