Communication apparatus for hostile environments

• US 4,491,699 A
• Filed: 04/15/1981
• Issued: 01/01/1985
• Est. Priority Date: 04/15/1981
• Status: Expired due to Fees

• Current Assignee: Baroid Technology Incorporated (Halliburton Company)
• Original Assignee: NL Industries Incorporated (Valhi Holding Company)
• Inventors: Walker, Martin J.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Schroeder, L. C.
• Application Number:
  US06/254,428
• Time in Patent Office: 1,357 Days
• Field of Search: 179/102, 179/156 R, 181/128, 455/89, 455/95, 455/100, 455/1 HI, 455/157, 455/1 DD, 455/1 UW, 455/1 MG, 455/1 VC
• US Class Current: 379/174
• CPC Class Codes: H04M 1/05 specially adapted for use on head, throat or breast
• CPC Class Codes: H04R 1/083 Special constructions of mouthpieces
• CPC Class Codes: H04R 27/04 Electric megaphones

Abstract

A dual communication system is disclosed including a microphone for mounting for use by a wearer of a protective face mask, the output signal from the microphone being communicated to both a speaker system for local, audible broadcast and to a transmitter for remote broadcast by radio signal.

Claims

1. Communication apparatus for use with facial covering comprising:

a. first microphone means for mounting relative to such facial covering for use by a wearer of said facial covering;

b. transmitter means;

c. external speaker means;

d. connection means, including cable means and connector means, whereby the output of said first microphone means may be communicated to said external speaker means and to said transmitter means;

e. second microphone means external to said facial covering; and

f. receptacle means included in said transmitter means for receiving said cable and connector means from said first microphone means;

g. wherein said receptacle means is movable between a first configuration, in which said receptacle means does not receive said cable and connector means and does provide communication between said second microphone means and said transmitter means, and a second configuration in which said receptacle means receives said cable and connector means and interrupts said communication from said second microphone means to said transmitter means.

2. Apparatus as defined in claim 1 further comprising receiver means.

3. Apparatus as defined in claim 1 further comprising amplifier means for receiving said output from said first microphone means and amplifying said output before communication to said external speaker means.

4. Apparatus as defined in claim 1 wherein said communication means may be sealed to said transmitter means.

5. Communication apparatus for use with facial coverings comprising:

a. microphone means for mounting relative to such facial covering for use by a wearer of said facial covering;

b. transmitter means;

c. external speaker means;

d. connection means, including cable means and connector means, whereby the output of said microphone means may be communicated to said external speaker means and to said transmitter means; and

e. switch means whereby said transmitter means may be selectively joined to said cable and connector means for reception of said microphone means output, and may be selectively connected to second microphone means external to said facial covering for receipt of output from said second microphone means.

6. Apparatus as defined in claim 5 further comprising receiver means.

7. Apparatus as defined in claim 5 further comprising amplifier means for receiving said output from said microphone means and amplifying said output before communication to said external speaker means.

8. Apparatus as defined in claim 5 wherein said communication means may be sealed to said transmitter means.