Communications: electrical – Land vehicle alarms or indicators – Internal alarm or indicator responsive to a condition of the...
Patent
1977-12-16
1979-05-15
Claffy, Kathleen H.
Communications: electrical
Land vehicle alarms or indicators
Internal alarm or indicator responsive to a condition of the...
340 5T, 179 1UW, 179 1VC, H04M 900
Patent
active
041549813
ABSTRACT:
A telephone system for use by divers employing demand breathing apparatus. ounds picked up by each diver's microphone are processed by selective filtering, amplification, rectification and comparison to a reference voltage level to provide logic signals representative of presence or absence of inhalation noise that could mask voice transmissions of other divers or of a tender. The microphone output to listening stations is switched through an attenuation path by the logic signal representing inhalation noise and through a by-pass or full strength path by the other logic signal.
REFERENCES:
patent: 3863027 (1975-01-01), Acks
patent: 3947636 (1976-03-01), Edgar
patent: 4044205 (1977-08-01), Mullarkey
Dewberry Larry F.
Tuovila Eric J.
Werle Christian P. F.
Claffy Kathleen H.
David Harvey A.
Kemeny E. S.
Sciascia Richard S.
The United States of America as represented by the Secretary of
LandOfFree
Telephone system for diver communication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Telephone system for diver communication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone system for diver communication will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1099453