Device for distinguishing a sine-wave signal from an increase in

Details Device for distinguishing a sine-wave signal from an increase in Device for distinguishing a sine-wave signal from an increase in

1963-03-22

1980-01-29

Jordan, Charles T.

Ammunition and explosives

Igniting devices and systems

340171R, 367135, F42B 2204

Patent

active

041855531

ABSTRACT:
3. In a mine, having an exploding mechanism capable of detecting underwater coustical sine-wave frequency signals emitted by a large moving vessel in the presence of broad-band acoustical frequency signals present in the surrounding water, when said vessel is within the effective target distance of the mine, the combination comprising:

REFERENCES:
patent: 2113148 (1938-04-01), Weber
patent: 2237899 (1941-04-01), Bjornson
patent: 2368953 (1945-02-01), Walsh
patent: 3131264 (1961-04-01), Chittleburgh et al.

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