Ignition system for combustion-powered tool
    21.
    发明授权
    Ignition system for combustion-powered tool 失效
    燃烧动力工具点火系统

    公开(公告)号:US5133329A

    公开(公告)日:1992-07-28

    申请号:US797355

    申请日:1991-11-25

    摘要: For a combustion-powered tool, an ignition system is powered by a battery and is arranged so that a sudden discharge of a capacitor, as charged via an oscillator, produces a spark at a spark gap of a spark plug, so that the oscillator is enabled if a trigger switch is closed while a head switch is closed, but not if the trigger switch is closed while the head switch is opened, and if a battery voltage, as monitored, is not less than a reference voltage, and so that a silicon-controlled rectifier, which is arranged to produce a sudden discharge of the capacitor, is switched to a conductive state if the capacitor voltage, as monitored, and is not less than a reference voltage. The head and trigger switches, which are photoelectric, are polled intermittently to determine whether they are closed. Predominantly, solid-state components are used.

    Printed circuit board fastener
    22.
    发明授权
    Printed circuit board fastener 失效
    印刷电路板紧固件

    公开(公告)号:US4652971A

    公开(公告)日:1987-03-24

    申请号:US662914

    申请日:1984-10-19

    IPC分类号: H05K7/20

    摘要: The invention relates to a fastener assembly for use in attaching articles to printed circuit boards, and include a fastener, which has a generally tubular body, flanged at one end, is adapted to receive a screw. The fastener has a polygonal cross-section over a portion of its length. The flange which is located at one end of the tubular body, has an integral spring washer and includes indentations which allow solder to flow from one side of the printed circuit board to the other. The fastener with its integral spring washer provides improved clamping characteristics and avoids problems associated with large coefficients of thermal expansion of printed circuit board material in a direction perpendicular to the board.

    摘要翻译: 本发明涉及一种用于将物品连接到印刷电路板上的紧固件组件,并且包括紧固件,该紧固件具有一个大体上管状的主体,其一端凸缘,适于容纳螺钉。 紧固件在其长度的一部分上具有多边形横截面。 位于管状体一端的凸缘具有整体的弹簧垫圈,并且包括允许焊料从印刷电路板的一侧流动到另一侧的压痕。 具有一体式弹簧垫圈的紧固件提供了改进的夹紧特性,并且避免了与垂直于板的方向相关的印刷电路板材料的大的热膨胀系数相关的问题。

    Releasable door hold-open device
    23.
    发明授权
    Releasable door hold-open device 失效
    可拆卸门保持开启装置

    公开(公告)号:US4040143A

    公开(公告)日:1977-08-09

    申请号:US712237

    申请日:1976-08-06

    IPC分类号: E05F3/22 E05F15/20

    摘要: A releasable door hold-open device or assembly is mounted on the header over a door panel. The assembly has a track channel with a top web and depending flanges. A door panel connector arm has a traveller movable in the track channel. A solenoid operates a detent in the track channel near the hinge end of the traveller path. A conductor channel is fastened to the top web and communicates with the track channel through an opening. A connector block releasably adjoins the track channel and the conductor channel at the hinge end thereof. A smoke detector underlies the connector channel at the other end of the track channel. Conductors from outside extend through the connector block, through connecting plugs in the block and track channel and to the solenoid and through the conductor channel to the smoke detector.

    摘要翻译: 可拆卸的门打开装置或组件安装在门板上的头部上。 该组件具有带顶部腹板和悬垂法兰的轨道。 门板连接器臂具有可在轨道通道中移动的行进器。 螺线管在靠近行进路径的铰链端的轨道通道中操作制动器。 导体通道固定在顶部腹板上,通过开口与轨道通道连通。 连接器块可释放地邻接轨道通道和在其铰链端处的导体通道。 烟雾探测器位于轨道通道另一端的连接器通道下方。 来自外部的导体通过连接器块,通过块和轨道通道中的连接插头连接到螺线管,并通过导体通道延伸到烟雾探测器。

    Switch arrangement for door closers
    24.
    发明授权
    Switch arrangement for door closers 失效
    闭门器的开关装置

    公开(公告)号:US4016381A

    公开(公告)日:1977-04-05

    申请号:US599067

    申请日:1975-07-25

    IPC分类号: H01H3/16

    CPC分类号: H01H3/161

    摘要: A door closer connected to a door panel movable on a door frame has a housing and a rod rotatable with respect to the housing in accordance with the relative position of the door panel and the door frame. The closer includes a rotary switch with limited movement which performs various switching functions dependent upon intended use with the associated electrical components and circuitry. The switch is actuated by a rod extension and also includes a hollow, insulating casing on a housing encompassing the extension with an inwardly projecting stop. An insulating rotor or clutch disc engages the extension with a slip-friction fit. The switch is constructed so it may be adjusted to match a particular door environment.

    摘要翻译: 连接到可在门框上移动的门板的门关闭装置具有壳体和可根据门板和门框的相对位置相对于壳体旋转的杆。 更近的包括具有有限运动的旋转开关,其执行取决于与相关联的电气部件和电路的预期用途的各种切换功能。 开关由杆延伸器致动,并且还包括在壳体上的中空绝缘壳体,该壳体包围具有向内突出的止挡件的延伸部。 绝缘转子或离合器盘与滑动摩擦配合接合延伸部。 开关被构造成可以调节以匹配特定的门环境。