Geophone

Details Geophone Geophone

1979-07-27

1981-08-18

Moskowitz, Nelson

Communications, electrical: acoustic wave systems and devices

Signal transducers

Receivers

267161, 367187, G01V 116, F16L 134

Patent

active

042850541

ABSTRACT:
A geophone comprising an annular coil-mass and a permanent magnet assembly positioned inside the annular coil-mass with their longitudinal axes generally coinciding to place the coil-mass in the magnetic field of the permanent magnet assembly. Spring spiders support the coil-mass on the permanent magnet assembly for axial and rotational movement relative to the permanent magnet assembly along and around the longitudinal axis thereof. Contacts extend outside the housing of the geophone to connect the geophone into an electrical circuit. Two axially spaced, parallel, spring spiders or diaphragm springs electrically connect the outside contacts to the terminals of the coils of the coil-mass.

REFERENCES:
patent: 3251028 (1966-05-01), Haggard
patent: 3577184 (1971-05-01), McNeel et al.
patent: 3602490 (1971-08-01), Mueller et al.
patent: 3718900 (1973-02-01), Holmes
patent: 3738445 (1973-06-01), Wilson et al.
patent: 3890606 (1975-06-01), Florian et al.
patent: 4144765 (1979-03-01), Ashe

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