Acoustic transducer with prestressed ring

Details Acoustic transducer with prestressed ring Acoustic transducer with prestressed ring

2005-04-12

2005-04-12

Budd, Mark (Department: 2834)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C337S369000

Reexamination Certificate

active

06879090

ABSTRACT:
The invention relates to acoustic transducers which comprise a ceramic ring formed from a pre-stressed set of segments.It consists in using, as screws for tightening pre-stressing wedges, screws with hexagonal heads and in placing on the inner face of these wedges a plate provided with recesses in which the cants of these screw heads become anchored. This plate comprises transverse channels allowing the passage of the power supply wires for the sectors. The central screw is removed after the desired pre-stressing has been obtained.It makes it possible to improve the manufacture of these transducers.

REFERENCES:
patent: 2469441 (1949-05-01), Pitisci
patent: 3142035 (1964-07-01), Harris
patent: 4446544 (1984-05-01), Connolly, Jr.
patent: 4858206 (1989-08-01), McMahon
patent: 5739625 (1998-04-01), Falcus
patent: 6222306 (2001-04-01), Groult et al.
patent: 0 593 323 (1994-04-01), None
patent: 2 728 755 (1996-06-01), None

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