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AUDIOVISUAL ANNUNCIATOR WITH PRIORITY RANKING FOR EACH CONDITION

  • US 3,582,949 A
  • Filed: 10/28/1968
  • Issued: 06/01/1971
  • Est. Priority Date: 10/28/1968
  • Status: Expired due to Term
First Claim
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1. In a system having a plurality of condition sensing devices, each of the devices being responsive to the occurrence of a different condition to generate a signal an improved annunciator for warning a system operator of the occurrence of a sensed condition, said annunciator comprising, in combination:

  • a plurality of channels, each channel being connected to a different condition sensing device and each channel being assigned a priority ranking;

    means in each channel for generating an inhibit signal in response to a signal from the connected condition sensing device and in response to an inhibit signal from the next higher priority channel;

    a plurality of audio signal-generating devices;

    means responsive to an inhibit signal from the lowest priority channel for simultaneously actuating said audio signalgenerating devices;

    a plurality of normally off switching amplifiers, one connected to each channel, each of said switching amplifiers having an input connected to the output of one of said audio signalgenerating devices and each of said switching amplifiers having an output connected to a common terminal;

    means for turning on the switching amplifier connected to the highest priority channel generating an inhibit signal;

    means for audibly transmitting said common output of said switching amplifiers to the system operator; and

    manually actuated means for silencing the highest priority inhibit signal being generated and for causing the switching amplifier connected to the next highest priority inhibit signal being generated to turn on.

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