• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A fire detector is provided with an electric insulator consisting of short segments of preferably a ceramic pipe disposed end-to-end within the space between an inside cylindrical electrode and cylindrical outside electrode. The inside electrode together with the insulator segments are covered with a thin salt-based layer and are disposed in the interior of the outside electrode so that between the insulator segments and the internal wall of the outside electrode an air space is formed along the length of the detector, whereby the insulator segments each provide a point-type contact between the internal wall of the outside electrode and the thin salt-based layer.
    公开号:SU1306488A3
    申请号:SU833598338
    申请日:1983-06-02
    公开日:1987-04-23
    发明作者:Крэнциш Маря；Котльэвски Витольд；Бэмбэнковски Кшиштоф
    申请人:Политехника Варшавска (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to fire alarm systems and can be used, in particular, in aircraft power plants, as well as in warehouse i and other premises protected by fire alarm systems. The purpose of the invention is to increase the reliability of the sensor.
    FIG. 1 shows the proposed sensor, a longitudinal section; Figure 2 is a fire alarm scheme using a linear fire alarm sensor.
    The linear fire alarm sensor contains an internal electrode 1 and an electrical insulator 2 in the form of short segments of a ceramic tube. Electrode 1 is located inside outer electrode 3A and together with electrical insulator 2 is covered with a thin layer of eutectic salt, which is the active element 4. Air space 5 is formed between electrode 1, electrical insulator 2 and inner wall of outer electrode 3, and insulator 2 has a point contact with the inner wall of the outer electrode 3.
    The fire alarm scheme (Fig. 2 contains a fire detection unit 6 connected to the sensor electrodes 1 and 2 and the alarm unit 7. The fire is symbolically represented by element 8 The sensor operates as follows: The sensor in the unheated state is characterized by a high circuit resistance internal electrode 1 - insulator 2 - eutectic salt layer 4 - outer electrode 3, and only point contacting takes place
    FIG g
    Compiled by L. Linetsky Editor I. Nikolaichuk Tehred L. Serdyukova Proofreader A. Zimokosov
    Order 1471/59 Tir.azh 544Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab. 4/5,
    Production and printing company, Uzhgorod, st. Project, 4

    layer 4 of the eutectic salt with the inner wall of the outer electrode 3 and there is no galvanic connection of them, because of which there would be a small transitional resistance.
    The occurrence of fire causes local overheating of the outer electrode 3, which causes the layer of salt of the active element 4 to melt in this zone, resulting in a sharp decrease in resistance. In this state, the current flows through the circuit of the inner electrode 1 - the layer of the active element 4 - the inner surface of the outer electrode 3.
    The change in resistance is detected by block 6, from which the fire information enters block 7, which signals the fire.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    A linear fire alarm sensor that contains an outer electrode in the form of a tube, which is coaxial with the inner electrode, made in the form of a wire, and an active element made of a eutectic salt or a mixture of several salts, characterized in that an electrical insulator, made in the form of segments of a ceramic tube, strung on an internal research institute electrode, covered together with the internal electrode by a layer of the active element and installed with the provision of a point co tact with the inner surface of the outer electrode.
    类似技术:
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    同族专利:
    公开号 | 公开日
    PL237897A1|1984-02-27|
    CA1194181A|1985-09-24|
    RO84867B|1984-09-30|
    DE3325668A1|1984-02-16|
    RO84867A|1984-08-17|
    PL138268B1|1986-08-30|
    YU167283A|1986-04-30|
    US4496930A|1985-01-29|
    CS241532B2|1986-03-13|
    CS547083A2|1985-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2477348A|1949-07-26|Thermoelectric apparatus |
    US2275873A|1941-04-19|1942-03-10|Wilfred J Turenne|Fire detector cable|
    US2413125A|1943-12-31|1946-12-24|Fenwal Inc|Fire detector cable|
    US2596285A|1949-09-15|1952-05-13|Petcar Res Corp|Method of forming beaded structure|
    US2566335A|1949-11-17|1951-09-04|Specialties Dev Corp|Heat or flame detecting element and assembly|
    US2936434A|1956-10-05|1960-05-10|Mc Graw Edison Co|Fire detector cable|
    GB1544941A|1977-07-22|1979-04-25|Bicc Ltd|Electric cable|GB8301666D0|1983-01-21|1983-02-23|Hotfoil Ltd|Temperature sensor|
    US5064271A|1989-03-14|1991-11-12|Santa Barbara Research Center|Fiber optic flame and overheat sensing system with self test|
    US5051595A|1989-12-06|1991-09-24|Santa Barbara Research Center|Fiber optic flame detection and temperature measurement system employing doped optical fiber|
    US5051590A|1989-12-06|1991-09-24|Santa Barbara Research Center|Fiber optic flame detection and temperature measurement system having one or more in-line temperature dependent optical filters|
    US4983119A|1990-03-26|1991-01-08|Lin Wen Tsung|Musical candle actuated by thermistor switch|
    GB9012272D0|1990-06-01|1990-07-18|Gore W L & Ass Uk|Flexible sheeting|
    CN100426331C|2006-12-06|2008-10-15|首安工业消防有限公司|Linear temperature sensing element with window on insulating layer|
    US20100142584A1|2008-12-09|2010-06-10|Harrington Brian P|Digital linear heat detector with thermal activation confirmation|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    PL1982237897A|PL138268B1|1982-08-13|1982-08-13|Linear fire detector of warning fire protection system|
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