Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Flashers
Reexamination Certificate
2000-10-27
2001-10-23
Vu, David (Department: 2821)
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Flashers
C315S076000, C315S20000A, C315SDIG004
Reexamination Certificate
active
06307328
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a flashlight and, more particularly, to a multipurpose flashlight, which can be controlled to regulate the intensity of light, or to flash. The multipurpose flashlight comprises a controller formed of a microprocessor, a PNP transistor and a MOS field effect transistor, a selector switch adapted to drive the controller to regulate the intensity of light of the lamp bulb installed in the flashlight, and a trigger switch adapted to drive the microprocessor to flash the lamp bulb.
The flashlight to which the present invention pertains is a small battery-operated portable electric light. Regular flashlights are designed for personal use in the dark for giving light. Because the intensity of light of conventional flashlights are not adjustable, different sizes of flashlights may be used to fit different light intensity requirements (see FIG.
1
(A)-(B)-(C)). It is not economic to prepare a set of flashlights of different sizes for use in different conditions. Further, conventional flashlights are not practical for use in a fishing boat or a particular condition to give a flashing signal.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a flashlight, which can be controlled to regulate the intensity of light. It is another object of the present invention to provide a flashlight, which can be controlled to give a flashing signal. It is still another object of the present invention to provide a flashlight, which prevents waste of power energy. To achieve these objects, the multipurpose flashlight of the present invention comprises a barrel holding a battery, a lamp head connected to one end of the barrel and holding a lamp bulb, a controller formed of a microprocessor, a PNP transistor and a MOS field effect transistor and adapted to regulate the intensity of light of the lamp bulb installed therein, a selector switch adapted to drive the controller to regulate the intensity of light of the lamp bulb, and a trigger switch adapted to drive the microprocessor to flash the lamp bulb.
REFERENCES:
patent: 6169373 (2001-01-01), Riesinger
Huang Chia-Shen
Ko Wen-Chung
Rosenberg , Klein & Lee
Vu David
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