Conformal wrap for pulse oximeter sensor
    23.
    发明授权
    Conformal wrap for pulse oximeter sensor 失效
    脉搏血氧饱和度传感器的保形包装

    公开(公告)号:US5919133A

    公开(公告)日:1999-07-06

    申请号:US826695

    申请日:1997-04-07

    IPC分类号: A61B5/00 A61B19/08

    摘要: The present invention is directed to a pulse oximeter sensor and an attached flexible carrier for measuring the oxygen saturation of a patient's blood. The carrier includes a compressible material, such as foam, for contacting the patient's skin and the sensor that applies a substantially uniform pressure to the skin.

    摘要翻译: 本发明涉及一种用于测量患者血液的氧饱和度的脉搏血氧计传感器和附接的柔性载体。 载体包括可压缩材料,例如泡沫,用于接触患者的皮肤和向皮肤施加基本均匀的压力的传感器。

    Line security device
    25.
    发明授权
    Line security device 失效
    线路安全设备

    公开(公告)号:US4039759A

    公开(公告)日:1977-08-02

    申请号:US586614

    申请日:1975-06-13

    申请人: James H. Taylor

    发明人: James H. Taylor

    IPC分类号: H04M1/70 H04M1/738

    CPC分类号: H04M1/70 H04M1/738

    摘要: A line security device adapted for use in a conventional telephone instrument including a Zener diode tied by its cathode to the high, or the Tip, lead within the instrument, the anode of the Zener diode controlling, across a resistor, the base of a first NPN-PNP transistor pair which, in the manner of a silicon controlled rectifier, or SCR, controls the all or nothing conduction of a second composite pair. The controlling base of the first pair is tied across a capacitor to the low, or Ring, lead of the instrument and the emitter of the PNP transistor thereof drives the base of the second composite pair which is in circuit with the high, or Tip, signal lead. The Zener diode is selected to break down on high line signal levels corresponding to the instances when the instrument is off the line, e.g., prior to the closure of the hook switch of the instrument, and will not pass the lower line to turn on the first transistor pair once another instrument is connected across the line. The configuration of the second composite pair thus provides an all or nothing switch in the instrument circuit including at its output regenerative feedback to maintain the first pair latched on. To preclude various noise spikes from appearing at the receiver, the receiver circuit includes a PNP transistor emitter connected and base biased to the Tip lead output of the second composite pair and further controlled at the base by the output of the first pair.