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    • 3. 发明授权
    • Modular probe
    • 模块式探头
    • US5955684A
    • 1999-09-21
    • US779321
    • 1997-01-06
    • James L. GravelSteve D. KruseRandall C. Olson
    • James L. GravelSteve D. KruseRandall C. Olson
    • G01F23/26G01F23/284H01R13/52H01R13/527H01R13/622G01D21/00
    • H01R13/527G01F23/268G01F23/284H01R13/5221H01R13/622
    • A modular probe that is used for determining levels in a process material container, bins, pipes, using capacitance, micro impulse radar, or other types of signals, and which has a self contained pressure seal in the probe. The probe mounts to a connector that has an explosion proof barrier. The connector in turn supports a transmitter housing, which can be made explosion proof as well. The probe is coupled to the connector in a manner so that they can be easily separated and replaced without altering the explosion proof barrier. An independent seal on the probe itself permits the probe to be installed in a tank prior to the transmitter installation, and the transmitter may be uncoupled from the connector and replaced with a new transmitter without affecting the explosion proof portion of the assembly. The transmitter housing may also be removed or replaced from service without disassembly of the housing while the probe remains installed in a tank or other location undisturbed until the transmitter is replaced. Further, an environmental seal between the probe and the connector may be replaced without removing the transmitter housing from the connector so the explosion proof barrier for the transmitter housing remains effective.
    • 用于确定过程材料容器,箱体,管道,使用电容,微型脉冲雷达或其他类型信号中的水平的模块式探头,并且在探头中具有自我包含的压力密封。 探头安装在具有防爆屏障的连接器上。 连接器又支撑变送器外壳,也可以防爆。 探针以一定的方式连接到连接器,使得它们可以容易地分离和更换,而不改变防爆屏障。 探头上的独立密封件本身允许在发射器安装之前将探头安装在罐中,并且变送器可以从连接器脱离,并用新的变送器替换,而不影响组件的防爆部分。 变送器外壳也可以在不拆卸外壳的情况下拆卸或更换,同时探头保持安装在坦克或其他位置不受干扰,直到变送器更换。 此外,可以更换探针和连接器之间的环境密封,而不需要从连接器移除变送器外壳,因此用于变送器外壳的防爆屏障保持有效。
    • 7. 发明授权
    • High sensitivity magnetic actuator
    • 高灵敏度磁力驱动器
    • US4638830A
    • 1987-01-27
    • US781358
    • 1985-09-27
    • Gregory C. BrownJames L. Gravel
    • Gregory C. BrownJames L. Gravel
    • H01F7/08F15B13/043H02K49/00H02K49/02G05D16/00F16K31/08
    • F15B13/0438Y10T137/2322
    • An improved magnetic actuator for providing mechanical actuation representative of an input current has a housing that supports a coil surrounding a central core, and includes a diaphragm type spring above the central core. A cover of high magnetic permeability is mounted on the housing spaced from the diaphragm spring. A permanent magnet is mounted on the diaphragm spring in a predetermined pole orientation and the magnet extends through an opening in the cover. The permanent magnet provides flux through the housing and the core. Sensitivity is increased by using the permanent magnet to provide a magnetic flux in addition to that created by currents in the coil. The magnet is oriented in relation to current flow in the coil so that the flux from the magnet will add to that generated by the coil in the gap between the pole face formed by the core and the spring and will subtract from the flux generated by the coil in the gap between the spring and the cover to provide a substantially linear deflection versus current relationship. The diaphragm spring is a sandwich of a pair of spider like spring discs having a thin layer of rubber between the plates to provide dampening to reduce sensitivity to vibration while aiding in providing linear operation.
    • 用于提供表示输入电流的机械致动的改进的磁致动器具有支撑围绕中心芯的线圈的壳体,并且在中心芯上方包括膜片式弹簧。 具有高磁导率的盖子安装在与膜片弹簧间隔开的壳体上。 永磁体以预定的极方向安装在膜片弹簧上,并且磁体延伸穿过盖中的开口。 永磁体通过壳体和芯体提供助焊剂。 除了由线圈中的电流产生的磁通量外,通过使用永久磁铁提供磁通量来增加灵敏度。 磁体相对于线圈中的电流流动取向,使得来自磁体的磁通量将增加线圈在由芯体和弹簧形成的极面之间的间隙中产生的磁通量,并且将从由磁体产生的磁通中减去 线圈在弹簧和盖之间的间隙中,以提供基本线性的偏转与电流的关系。 隔膜弹簧是一对蜘蛛式弹簧盘的夹层,其在板之间具有薄的橡胶层,以提供阻尼以减少对振动的敏感性,同时有助于提供线性操作。