Oyo Corporation

Oyo Corporation U.s.a.

Fred W Hefer

This invention includes a seismic detector located in the bottom portion of a casing. The upper portion of said casing contains a printed circuit disc. The printed circuit disc is provided to serve as a junction between the conductor wires of the geophone leader cable and the geophone's terminals, and to anchor the geophone leader cable to the geophone casing.

Printed-circuit disc for stringing geophones

The geophone transducer comprises in combination: a geophone capable of detecting horizontal seismic waves, and a rigid casing having a gimbal chamber. A gimbal is provided inside the chamber on which the geophone is mounted for limited free angular movement in one direction only. The gimbal includes in one preferred embodiment a viscous liquid in which the geophone is only partially submerged while it is supported by a U-shaped bracket which is mounted for rotation about a fixed axis.

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Houston, TX, United States of America

Fred W Hefer