Depth alarm for a seismic sensor

Details Depth alarm for a seismic sensor Depth alarm for a seismic sensor

1989-11-13

1990-05-15

Steinberger, Brian S.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367167, 310337, H04R 1700, H01L 4108

Patent

active

049263978

ABSTRACT:
A hydrophone having a self-contained means for warning an operator that the hydrophone has reached or exceeded a safe design depth limit. The active elements of the hydrophone are bender-type piezoelectric wafers. An internal stop is provided such that in the presence of a hydrostatic pressure that exceeds a safe design limit, the wafers bottom out against the stop. The stop short-circuits the electrical output signals of the wafers, warning the operator that the hydrophone is in danger of destruction.

REFERENCES:
patent: 3660809 (1972-05-01), Pearson
patent: 3970878 (1976-07-01), Berglund
patent: 4841192 (1989-06-01), Tetlie et al.

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