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Patient care and communication system

  • US 6,958,706 B2
  • Filed: 06/18/2001
  • Issued: 10/25/2005
  • Est. Priority Date: 07/27/1990
  • Status: Expired due to Fees
First Claim
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1. A patient control unit, including:

  • a housing;

    a first switch mounted to the housing having a first terminal coupled to a first conductor and a second terminal coupled to a reference voltage; and

    a self-test switch mounted to the housing having a first terminal coupled to a test conductor and a second terminal coupled to the first conductor;

    wherein the self-test switch actuates in response to a test signal provided on the test conductor by a remote circuit thereby verifying continuity from the first switch first terminal to the remote circuit.

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