Electromagnetic resonant vibrator

Details Electromagnetic resonant vibrator Electromagnetic resonant vibrator

1989-09-07

1992-04-21

Isen, Forester W.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381202, 381193, 340407, 340825, 340 46, H04R 2500, G08B 522

Patent

active

051075407

ABSTRACT:
An apparatus for effecting a vibrating motion comprises a resonant planar armature, a housing, an electromagnetic device attached to the housing for effecting an alternating electromagnetic field, a magnetic device coupled to the armature and to the electromagnetic field for alternatively moving the armature in a first and a second direction in response to the electromagnetic field. The resonant planar armature comprises a plurality of planar spring members arranged regularly about a central planar region within a planar perimeter region of the armature, and the spring members provide a restoring force normal to a movement of the central region of the armature caused by the alternating electromagnetic field.

REFERENCES:
patent: Re20896 (1938-10-01), Greibach
patent: 4225965 (1980-09-01), Baugh
patent: 4385210 (1983-05-01), Marquiss
patent: 4628907 (1986-12-01), Epley
patent: 4728936 (1988-03-01), Pfander et al.
patent: 4843628 (1984-06-01), Hofer
patent: 4931765 (1990-06-01), Rollins et al.
patent: 5023504 (1991-06-01), Mooney et al.

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