发明名称 |
ELECTRIC INCANDESCENT LAMP WITH ELLIPSOID-SHAPED ENVELOPE |
摘要 |
<p>1 PHN 9356 In electric incandescent lamps having an infrared radiation-reflecting filter which is pervious to visible light, the efficiency can be increased by adapting the geometry of the filter and the geometry of the filament to each other. According to the invention, the filter comprises a major portion of a prolate ellipsoid of revolution and a cylindrical filament extends between the foci thereof, the distance between focal points being from 1-2 times the length of the filament.</p> |
申请公布号 |
CA1146625(A) |
申请公布日期 |
1983.05.17 |
申请号 |
CA19800346174 |
申请日期 |
1980.02.21 |
申请人 |
N.V. PHILIPS'GLOEILAMPENFABRIEKEN |
发明人 |
DE VRIJER, BERTUS;EIJKELENBOOM, LEONARD C.H.;DE RIDDER, JAN |
分类号 |
H01K1/32;H01K1/14;H01K1/18;H01K1/28;(IPC1-7):H01K1/32;H01K1/26 |
主分类号 |
H01K1/32 |
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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