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Local external communication device for enclosed helmet and mask assembly

  • US 4,374,301 A
  • Filed: 09/18/1980
  • Issued: 02/15/1983
  • Est. Priority Date: 09/18/1980
  • Status: Expired due to Term
First Claim
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1. A local external communication device for use with an assembly which covers the ears and mouth of the wearer and which is provided with a communication system comprising a microphone adapted to be connected to a source of power and an earphone and a lead provided with a first coupling element for connecting said communication system to a radio or intercom system including in combination, a housing, a speaker in said housing, a microphone in said housing, a battery in said housing, a second coupling element on said housing adapted to mate with said first coupling element to form an electrical connection between said communication system and said device, said coupling elements when engaged connecting said communication system microphone to said speaker and connecting said device microphone to said earphone, a three-position switch on said housing, said switch in a first position connecting said battery to both of said microphones with said coupling elements engaged, said switch in a second position connecting said battery only to said device microphone, said switch in said third position disconnecting said battery from both said microphones, and means for detachably securing said housing to the body of a wearer.

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