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    Testing photoelectric smoke detectors
    3.
    发明公开
    Testing photoelectric smoke detectors 失效
    Funktionsprüfungvon photoelektrischen Rauchmeldern。

    公开(公告)号：EP0664533A1

    公开(公告)日：1995-07-26

    申请号：EP95300357.1

    申请日：1995-01-20

    申请人： BRK BRANDS, INC.

    发明人： Minnis, David A

    IPC分类号： G08B29/14

    CPC分类号： G08B29/14

    摘要： A photoelectric smoke detector (10) has test circuitry (34; 26a) for testing the detector (10) by increasing the sensitivity thereof. The sensitivity is increased by either altering a bias condition of a photosensor (30) or by altering a gain parameter of the detector (10). The detector (10) returns to a quiescent state when the sensor (30) returns to its original bias condition or when the gain parameter returns to its quiescent value.

    摘要翻译： 光电烟雾探测器（10）具有用于通过提高其灵敏度来测试检测器（10）的测试电路（34; 26a）。 通过改变光电传感器（30）的偏置条件或通过改变检测器（10）的增益参数来提高灵敏度。 当传感器（30）返回到其原始偏置条件或当增益参数返回到其静态值时，检测器（10）返回到静止状态。

    READILY DEPLOYABLE PORTABLE ESCAPE LADDER
    6.
    发明公开
    READILY DEPLOYABLE PORTABLE ESCAPE LADDER 失效
    FAST架桥便携式逃生梯

    公开(公告)号：EP0728252A4

    公开(公告)日：1996-12-27

    申请号：EP95929498

    申请日：1995-08-11

    申请人： BRK BRANDS INC

    发明人： DOUGLAS PATRICK ,  JURSICH DON ,  FENNE KENNETH R

    IPC分类号： E06C1/56

    CPC分类号： E06C1/56

    摘要： A readily deployable, portable escape ladder (10) includes nestable rungs (16) maintained in a releasable, stacked state. The ladder (10) includes a cover (78) having a releasable fastening systen which, when released, permits the ladder (10) to move from the stacked state to an extended state. The rungs (16) include integral standoff (40) members to displace the ladder (10) from the surface of a building when deployed. The rungs (16) are spaced one from the other, along a flexbile mounting member (18). The mounting member (18) penetrates the rungs in a staggered orientation.

    READILY DEPLOYABLE PORTABLE ESCAPE LADDER
    7.
    发明公开
    READILY DEPLOYABLE PORTABLE ESCAPE LADDER 失效
    FAST架桥便携式逃生梯

    公开(公告)号：EP0728252A1

    公开(公告)日：1996-08-28

    申请号：EP95929498.0

    申请日：1995-08-11

    申请人： BRK BRANDS, INC.

    发明人： DOUGLAS, Patrick ,  JURSICH, Don ,  FENNE, Kenneth, R.

    IPC分类号： E06C1

    CPC分类号： E06C1/56

    摘要： A readily deployable, portable escape ladder (10) includes nestable rungs (16) maintained in a releasable, stacked state. The ladder (10) includes a cover (78) having a releasable fastening systen which, when released, permits the ladder (10) to move from the stacked state to an extended state. The rungs (16) include integral standoff (40) members to displace the ladder (10) from the surface of a building when deployed. The rungs (16) are spaced one from the other, along a flexbile mounting member (18). The mounting member (18) penetrates the rungs in a staggered orientation.

    ULTRA-SHORT WAVELENGTH PHOTOELECTRIC SMOKE DETECTOR
    9.
    发明公开
    ULTRA-SHORT WAVELENGTH PHOTOELECTRIC SMOKE DETECTOR 审中-公开
    具有消息ULTRKURZER波长光电感烟

    公开(公告)号：EP1194908A4

    公开(公告)日：2004-10-13

    申请号：EP00914824

    申请日：2000-03-03

    申请人： BRK BRANDS INC

    发明人： VENZANT KENNETH L ,  WATSON MARK A ,  JOHNSTON DEREK SCOTT ,  BROOKS FLOYD E ,  DURAN EDWARD C

    IPC分类号： G08B17/107 ,  G08B17/10

    CPC分类号： G08B17/107 ,  G08B17/113

    摘要： A photoelectric smoke detector incorporates a short wavelength radiant energy emitter (14). The emitter, an LED or laser diode, emits frequencies in a range of 430 to 450 nanometers. The emitted frequencies can be further shortened by directing them to impinge on a non-linear crystalline material (22). Radiant energy emitted from the material will have a wavelength on the order of sixty percent that of incident radiant energy (14'). The short wavelength energy will be scattered by airborn particulate matter characteristic of relatively fast, flaming fires. The emitter, an LED or laser diode can include an 880 or 940 nm wavelength coupled with shorter wavelength ranges (190-450 nm) with associated detection. It also has the capability of detecting slow burning smoldering-type fires. A control circuit and an audible output device provide a local audible alarm of a detected fire.