Underwater electric current and alternating magnetic field detec

Details Underwater electric current and alternating magnetic field detec Underwater electric current and alternating magnetic field detec

1952-06-23

1980-08-26

Blum, Theodore M.

Ammunition and explosives

Igniting devices and systems

324239, 324204, 324334, F42B 2138, F42B 2148

Patent

active

042189756

ABSTRACT:
1. An underwater eddy current detector comprising a hollow elongated conding member, said conducting member having a plurality of longitudinal conducting paths forming portions of the exterior surface of said conducting member, a portion of said conducting member formed of material having conductivity of lesser degree than said conducting member and arranged to direct eddy currents induced in said conducting member to said conducting paths, a plurality of toroidal detector coils wound upon annular laminated structures, each of said detector coils encircling one of said conducting paths, whereby a potential which is proportional to a detected signal is induced in said coils when said conducting member is submerged in a conducting medium and located in the path of flow of a plurality of currents flowing in said conducting medium.

REFERENCES:
patent: 2300565 (1942-11-01), Golovizini
patent: 2344483 (1944-03-01), Borracci
patent: 2412742 (1946-12-01), Muffly
patent: 2436394 (1948-02-01), Maltby et al.
patent: 2503483 (1950-04-01), Hartman
patent: 2542057 (1951-02-01), Relis
patent: 2749509 (1956-06-01), Medlar
patent: 2780781 (1957-02-01), Medlar
Chapman and Bartels, Oxford University Press, 1940, pp. 445-448.

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