Acoustic exploder

Communications – electrical: acoustic wave systems and devices – Echo systems – Returned signal used for control

Patent

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G01S 1500

Patent

active

057611548

ABSTRACT:
There is disclosed an exploder for an underwater weapon which periodically adiates an acoustic signal and activates the weapon only when the echo signal has the same phase as the radiated signal. Thus, echoes from any air-water interface are disregarded.

REFERENCES:
patent: 2908888 (1959-10-01), Kirkland
patent: 2943570 (1960-07-01), Puechberty
patent: 3017832 (1962-01-01), MacDonald
patent: 3031644 (1962-04-01), Hisserich et al.
patent: 3115833 (1963-12-01), Hall et al.
patent: 3360769 (1967-12-01), Lord
Cited by applicant on a paper dated: Aug. 1969.

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