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12 条记录 (耗时 0.012 秒)

    Aquarium-tank heating control
    1.
    发明授权
    Aquarium-tank heating control 失效
    水族箱加热控制

    公开(公告)号：US3890486A

    公开(公告)日：1975-06-17

    申请号：US50707574

    申请日：1974-09-18

    申请人： EQUIPMENT DEV CORP

    发明人： FITZGERALD ROBERT C

    IPC分类号： A01K63/06 ,  H01H61/02 ,  H05B3/00 ,  H05B3/80 ,  H05B3/06

    CPC分类号： H05B3/80 ,  A01K63/065 ,  H01H61/02 ,  H05B3/00

    摘要： Heating devices are provided having a resistive heating element for heating a first region and a temperature control electrically coupled to the resistive heating element and positioned in a second region spaced from the first region. The temperature control is adapted to respond to the ambient temperature at the second region and the amount of current applied to the resistive heating element to maintain the temperature at the first region. The resistive heating element may consist of a length of resistive electrical conductor distributed over an area and encapsulated in a flexible waterproof material so as to define a sheet.

    摘要翻译： 提供加热装置，其具有用于加热第一区域的电阻加热元件和电耦合到电阻加热元件并且定位在与第一区域间隔开的第二区域中的温度控制。 温度控制适于响应于第二区域处的环境温度和施加到电阻加热元件的电流量以将温度保持在第一区域。 电阻加热元件可以由分布在一个区域上的电阻电导体的长度组成，并且封装在柔性防水材料中以便限定片材。

    Circuit board assembly
    2.
    发明授权
    Circuit board assembly 失效
    电路板总成

    公开(公告)号：US3789271A

    公开(公告)日：1974-01-29

    申请号：US3789271D

    申请日：1972-11-29

    申请人： AUTOMATIC EQUIPMENT DEV CORP

    发明人： JOHNSTON J

    IPC分类号： H05K7/08 ,  H05K1/04

    CPC分类号： H05K7/08

    摘要： A circuit board assembly comprising a frame having a stack of printed circuit boards mounted in fixed position thereon and having circuit means associated therewith. Each circuit board carries a plurality of resilient electrically conductive pin connectors which project from opposite surfaces thereof and extend through other circuit boards which comprise the stack. A pressure plate supported on the frame in generally parallel relation to the stack includes another circuit board which has circuit means and holes therethrough which receive the pins associated with the stack. Each hole defines a clamping surface and has a cross-sectional area substantially greater than the cross-sectional area of an associated portion of a pin received therein. The pressure plate is supported for shifting movement in one and an opposite direction relative to the frame and transversely of the pins between open and closed positions. When the pressure plate is in its open position, a lead of an associated circuit component may be freely inserted into each hole between the clampin surface thereof and the pin received therein. When the pressure plate is in its closed position, the clamping surface exerts a biasing force on the loead and on the pin associated therewith to clamp the lead in electrically connected engagement with the pin and clamping surface to establish electrical circuit continuity between the leads and circuit means associated with the various circuit boards. A clamping screw on the frame is provided for moving th pressure plate to and releasably retaining it in its closed position.

    摘要翻译： 一种电路板组件，包括具有安装在其上固定位置的印刷电路板的堆叠并具有与其相关联的电路装置的框架。 每个电路板承载多个弹性导电针连接器，其从相对表面突出并延伸穿过包括该叠层的其它电路板。 支撑在框架上的大致平行于堆叠的压板包括另一个电路板，其具有电路装置和穿过其中的孔，其接收与堆叠相关联的销。 每个孔限定夹紧表面，并且具有基本上大于其中接收的销的相关部分的横截面面积的横截面面积。 压板被支撑用于相对于框架在一个相反的方向上移动运动，并且在打开位置和闭合位置之间横向于销。 当压板处于其打开位置时，相关联的电路部件的引线可以自由地插入其夹紧表面和接收在其中的销之间的每个孔中。 当压板处于其关闭位置时，夹紧表面在磁头和与其相关联的销上施加偏压力，以将导线夹紧到与销和夹紧表面电连接的接合中，以在引线和电路之间建立电路连续性 与各种电路板相关的装置。 提供框架上的夹紧螺钉用于将压板移动到其可释放地保持在其关闭位置。

    Reflex to direct photocopying method and apparatus
    9.
    发明授权
    Reflex to direct photocopying method and apparatus 失效
    反映到直接光刻方法和装置

    公开(公告)号：US3612680A

    公开(公告)日：1971-10-12

    申请号：US3612680D

    申请日：1968-11-26

    申请人： EQUIPMENT DEV CORP

    发明人： MACKLEM F SUTHERLAND

    IPC分类号： G03G15/28 ,  G03B15/06

    CPC分类号： G03G15/28

    摘要： A method and device for producing electrophotographic copies of opaque documents or documents printed on both sides, through reflex exposure of commercial electrophotographic papers, films, or the like. The original document is placed face-to-face with the electrophotographic surface which has been especially preconditioned for reflex exposure by electrostatic charge limitation. The electrophotographic surface is exposed to a specially limited quantity of light directed through it to the face of the original document, the assembled pair being maintained in close contact during the exposure. Following exposure, an image is developed on the electrophotographic surface by electrostatic toning. The developed reflex image is a reversal of the original so that right-reading copies of the original are made from it by face-to-face reproduction means, such as by a direct exposure electrophotographic contact printing operation.