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    • 43. 发明授权
    • Crossover switch
    • 交叉开关
    • US4459102A
    • 1984-07-10
    • US365680
    • 1982-04-05
    • Boyd G. Brower
    • Boyd G. Brower
    • G03B15/04H05K1/00F21K5/02
    • G03B15/0457H05K1/0293H05K2201/0112H05K2203/175
    • A multilamp photoflash array has a circuit board with a printed circuit thereon and a plurality of flashlamps connected to the printed circuit with a normally open (N/O) switch of electrically insulating material overlaying a portion of the printed circuit and a normally closed (N/C) switch of solid electrically conductive material overlaying the normally open (N/O) switch and portion of the printed circuit to provide a crossover switch. A process for fabricating a crossover switch includes affixing the printed circuit to the circuit board, depositing a normally open (N/O) switch over a portion thereof and attaching a normally closed (N/C) switch of solid electrically conductive material over the printed circuit portion and normally open (N/O) switch to provide a crossover switch.
    • 多路闪光灯闪光阵列具有其上具有印刷电路的电路板,并且多个闪光灯通过覆盖印刷电路的一部分的常闭(N / O)开关和常闭(N / C)固定导电材料的开关,覆盖常开(N / O)开关和印刷电路的一部分,以提供交叉开关。 制造交叉开关的过程包括将印刷电路固定到电路板上,在其一部分上沉积常开(N / O)开关,并将固体导电材料的常闭(N / C)开关连接在印刷 电路部分和常开(N / O)开关以提供交叉开关。
    • 46. 发明授权
    • Radiation switch for photoflash unit
    • 闪光灯单元的辐射开关
    • US4336570A
    • 1982-06-22
    • US148119
    • 1980-05-09
    • Boyd G. BrowerGary L. Houseknecht
    • Boyd G. BrowerGary L. Houseknecht
    • G03B15/04H01H35/00H05K1/00G03B15/02
    • G03B15/0457H05K1/0293H05K2201/0112H05K2203/173
    • A photoflash unit having a plurality of flashlamps mounted 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 over a finite time interval. The switches are prepared from compositions comprising admixtures of silver carbonate and/or silver oxide, silver-coated glass beads and a binder; the admixtures may also include electrically non-conductive particulate solids, such as titanium dioxide, and/or silver-coated metal beads. The constituents and proportions of the switch compositions are selected to provide a predetermined conversion time of twelve milliseconds or greater, thereby permitting reliable functioning with comparatively long duration, low voltage firing pulses.
    • 一种闪光灯单元,其具有安装在印刷电路板上的多个闪光灯,所述印刷电路板包含响应于施加到其上的连续点火脉冲来顺序地点燃闪光灯的电路。 该电路包括多个固态开关,其能够由位于相应开关附近的灯闪烁期间产生的辐射能激活。 最初,每个开关具有足够高的电阻以对所施加的点火脉冲提供开路,并且在被辐射激活之后,开关在有限的时间间隔内进行化学转换为导通状态。 开关由包含碳酸银和/或氧化银,银涂覆的玻璃珠和粘合剂的混合物的组合物制备; 混合物还可以包括非导电性的颗粒固体,例如二氧化钛,和/或银涂覆的金属珠粒。 选择开关组成的组成和比例以提供十二毫秒或更大的预定转换时间,由此允许具有较长持续时间,低电压点火脉冲的可靠功能。