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    • 3. 发明授权
    • Pressure change warning switch
    • 压力变化警告开关
    • US5818002A
    • 1998-10-06
    • US810500
    • 1997-02-28
    • Kevin D. KurtzSteven N. GinnDavid L. Kordecki
    • Kevin D. KurtzSteven N. GinnDavid L. Kordecki
    • H01H35/34
    • H01H35/346
    • A pressure switch is illustrated that includes only three piece parts--two dimpled covers and a spacer. By selecting both the type and thickness of cover materials, switching pressure ranges can be selected to accommodate a very wide range of operating pressures. Fine adjustment of the switching pressure may be made by modifying the cover dimples. Reliability and a hermetic seal is attained through the use of appropriate materials for the covers and spacer, together with active metal braze seals which provide high temperature, moisture and chemical resistance. A vacuum port is added for providing the ability to modify the air pressure within the pressure switch.
    • 示出了仅包括三个部件的两个凹坑盖和间隔件的压力开关。 通过选择覆盖材料的类型和厚度,可以选择开关压力范围以适应非常宽的工作压力范围。 开关压力的微调可以通过改变盖子凹坑来进行。 可靠性和气密性密封通过使用合适的材料用于盖和间隔件,以及提供高温,防潮和耐化学性的活性金属钎焊密封。 增加一个真空口以提供改变压力开关内气压的能力。
    • 5. 发明授权
    • Dual track resistor element having nonlinear output
    • 具有非线性输出的双轨电阻元件
    • US4435691A
    • 1984-03-06
    • US360373
    • 1982-03-22
    • Steven N. Ginn
    • Steven N. Ginn
    • H01C10/04H01C10/16
    • H01C10/04
    • A variable resistor element (10) comprises two thick film resistance layers or tracks (12, 14; 40, 50) electrically insulated one from another and on an insulating substrate (11). The thick film resistance layers (40, 50) may consist of the same resistance composition and thereby have the same resistivity, but the paths (40, 50) having different widths to effect different resistances; or, the widths of the resistance layers (12, 14) may be the same but the layers (12, 14) comprise different resistance compositions having different resistivities. An electrical contactor (20) has flexible fingers (22) wipably and respectively engaging the surface of each resistance layer (12, 14; 40, 50) to complete a circuit across the tracks (12, 14; 40, 50) and through the terminals (16 and 66) of the respective layers. As the wiper (22) is moved along the resistance layers (12, 14; 40, 50), there is effected a variable rate of change of resistance per length of travel for each resistance layer, and thereby producing a characteristically nonlinear output. The ratio of the rates of change of resistance of the respective resistance layers determines the output characteristic of the dual track resistor element (10).
    • 可变电阻器元件(10)包括彼此电绝缘的绝缘基板(11)上的两个厚膜电阻层或轨道(12,14; 40,50)。 厚膜电阻层(40,50)可以由相同的电阻组成构成,从而具有相同的电阻率,但具有不同宽度的路径(40,50)来实现不同的电阻; 或者,电阻层(12,14)的宽度可以相同,但是层(12,14)包括具有不同电阻率的不同电阻组合物。 电接触器(20)具有柔性指状物(22),其可擦拭地并分别接合每个电阻层(12,14; 40,50)的表面,以完成穿过轨道(12,14; 40,50)的电路,并通过 端子(16和66)。 当刮水器(22)沿着电阻层(12,14; 40,50)移动时,每个电阻层的每个行程长度的电阻变化率变化,从而产生特征非线性的输出。 各电阻层的电阻变化率的比确定双轨电阻元件(10)的输出特性。