Communications – electrical: acoustic wave systems and devices – Underwater system – Telemetering
Patent
1980-07-07
1982-01-19
Farley, Richard A.
Communications, electrical: acoustic wave systems and devices
Underwater system
Telemetering
367137, 367142, 367910, H04B 1100
Patent
active
043120547
ABSTRACT:
Acoustic beacon for use at sea and having a pipe-shaped housing in the one nd of which is space for a battery which drives a transmitter disposed coaxially around the housing at the other end where there is arranged a pressure switch covered by a membrane. The transmitter is switched on by the pressure switch when the pressure on the outside of the membrane exceeds a certain limit when the beacon falls in water.
REFERENCES:
patent: 3038143 (1962-06-01), Dow
patent: 3611276 (1971-10-01), Massa
patent: 3686656 (1972-08-01), Richards
patent: 3798692 (1974-03-01), Madeley
Farley Richard A.
SINTEF (Selskapet for Industriell og Teknisk Forskning ved NTH)
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