发明名称 |
Radiation switch for photoflash unit. |
摘要 |
<p>A photoflash unit having a plurality of flashlamps mounted in a planar array on a printed circuit board containing circuitry for sequentially igniting the flashlamps in response to successive firing pulses applied thereto. The circuitry includes a plurality of solid state switches capable of being activated by radiant energy generated during flashing of lamps located adjacent to respective switches. Initially, each of the switches has a resistance sufficiently high to provide an open circuit to the applied firing pulses, and after being activated by radiation, the switch undergoes chemical conversion to a conductive state. The switches are prepared from compositions which include a selected proportion of silver-coated glass beads to consistently assure a predetermined low resistance after conversion and maintenance of good adherence and electrical contact with the printed circuit board circuitry.</p> |
申请公布号 |
EP0039902(A2) |
申请公布日期 |
1981.11.18 |
申请号 |
EP19810103446 |
申请日期 |
1981.05.06 |
申请人 |
GTE PRODUCTS CORPORATION |
发明人 |
BROWER, BOYD G.;SHAFFER, JOHN W. |
分类号 |
G03B15/04;H01B1/14;H01H1/00;H01H37/00;H05K1/00;(IPC1-7):03B15/04 |
主分类号 |
G03B15/04 |
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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