发明名称 |
Flashlight equipped with low wattage arc lamp |
摘要 |
A hand-held flashlight comprising a metal halide arc lamp operating between 8 and 22 watts. The lamp has an arc gap of between 0.7 and 1.4 mm and a color temperature at or above 5000° Kelvin. The lamp contains a fill gas including mercury and indium in percentages to produce a point source of white light capable of penetrating dense smoke and fog. The flashlight includes a reflector containing the arc lamp and providing a collimated beam of high intensity white light. The flashlight includes a circuit for providing a high starting voltage to the lamp and a lower operating voltage after sustaining the lamp. The circuit includes a battery, a ballast, and a microprocessor for monitoring the lamp and the battery. The microprocessor provides a discernible output signal indicative of the lamp on-time and battery voltage. The microprocessor controls the application of the starting voltage from the ballast to the lamp to prevent misstarting of the lamp.
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申请公布号 |
US6866400(B2) |
申请公布日期 |
2005.03.15 |
申请号 |
US19990249922 |
申请日期 |
1999.02.12 |
申请人 |
WELCH ALLYN, INC. |
发明人 |
WOOD ROBERT J.;ERNYEY LORAND;HARKINS JOHN |
分类号 |
F21L4/00;H01J61/18;H01J61/90;(IPC1-7):F21L4/00 |
主分类号 |
F21L4/00 |
代理机构 |
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代理人 |
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地址 |
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