发明名称 |
Electrical connectors, lamps and lampholders |
摘要 |
A lamp has a tungsten filament within an evacuated glass bulb and connected to electrical conductors. Connected between the two electrical conductors are a series-connected neon and resistor. In use, the tungsten filament provides a primary light-emitting device, and the neon provides a secondary light-emitting device. The light intensity emitted by the filament is very much greater than that emitted by the neon. Therefore, in normal use, the neon will hardly be seen. However, in the event that the filament fails, the neon continues to emit light. With the main filament extinguished, the light emitted by the neon becomes quite visible, and serves to indicate the presence of electric power at the lamp contacts. Therefore, a user can switch off the power supply to the lamp at the local switch, the neon indicating when this has safely been done. Such a neon can alternatively be built into a lampholder, or into an electric power connector to indicate the presence of electric power at load contacts only when there is no load present at the load contacts or only when the load fails.
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申请公布号 |
US6163264(A) |
申请公布日期 |
2000.12.19 |
申请号 |
US19980034359 |
申请日期 |
1998.03.04 |
申请人 |
BIRCH, ANDREW CLIFFORD;WARRINGTON, ANDREW JOHN;WOLFE, TREVOR DAVID |
发明人 |
BIRCH, ANDREW CLIFFORD;WARRINGTON, ANDREW JOHN;WOLFE, TREVOR DAVID |
分类号 |
H01R13/717;H01R33/945;(IPC1-7):G08B21/00 |
主分类号 |
H01R13/717 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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