Variable reluctance acoustic projector

Details Variable reluctance acoustic projector Variable reluctance acoustic projector

1993-04-30

1994-04-19

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367182, 381192, 381194, 381199, H04R 2300

Patent

active

053052889

ABSTRACT:
A variable reluctance acoustic projector includes a piston structure that provides rigid retention and precise alignment of electromagnetic cores within the projector housing. The piston structure provides a pair of metallic piston blocks having cavities in which the electromagnetic cores are mounted. The piston blocks rigidly retain the electromagnetic cores within the cavities by compressive loading, improving the structural reliability of the device. In addition, the piston blocks enable precise alignment and orientation of the pole faces of opposing electromagnetic cores parallel to one another. Flexure ribs formed in the piston blocks increase the compliance of the blocks to substantially confine motion of the piston blocks to translation along a single axis of actuation during excitation of the electromagnetic cores.

REFERENCES:
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patent: 3725856 (1973-04-01), Chervenak
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patent: 4208736 (1980-06-01), Babikyan
patent: 4387451 (1983-06-01), Wilcox
patent: 4690004 (1987-09-01), Tavis
patent: 4845450 (1989-07-01), Porzio et al.
patent: 5126979 (1992-06-01), Rowe, Jr. et al.
patent: 5206839 (1993-04-01), Murray

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