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Class Information
Number: 367/175
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > Transducer with diaphragm > Diaphragm with electric driving coil
Description: Subject matter wherein the diaphragm is driven by an electromagnetic coil.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8670292 Electromagnetic linear actuators for marine acoustic vibratory sources Mar. 11, 2014
8446798 Marine acoustic vibrator having enhanced low-frequency amplitude May. 21, 2013
8427906 Acoustic sensor utilizing acoustoelectric effect Apr. 23, 2013
7355926 Portable low frequency projector Apr. 8, 2008
6771565 Low voltage seismic sound source Aug. 3, 2004
6483778 Systems and methods for passively compensating transducers Nov. 19, 2002
RE36512 Method of fabricating an electroacoustic transducer Jan. 18, 2000
6009047 Sound generation device Dec. 28, 1999
5941838 Shock wave source based on the electromagnetic principle Aug. 24, 1999
5912863 Electro-acoustic transducer Jun. 15, 1999
5889732 Sounder Mar. 30, 1999
5675885 Method of winding a coil for an electroacoustic transducer Oct. 14, 1997
5642333 Electroacoustic transducer and method of winding coil therein Jun. 24, 1997
5625700 Method of farbicating an electroacoustic transducer Apr. 29, 1997
5532980 Vibrational anti-fouling system Jul. 2, 1996
5529572 Method and apparatus particularly useful for treating osteoporosis Jun. 25, 1996
5471437 Electrodynamic acoustic transducer Nov. 28, 1995
5467323 Electroacoustic transducer Nov. 14, 1995
5450373 Apparatus for transmitting two frequency signals with an acoustic projector Sep. 12, 1995
5432758 Electroacoustic transducer Jul. 11, 1995
5425002 Acoustic pressure pulse generator Jun. 13, 1995
5416751 Electroacoustic transducer May. 16, 1995
5374236 Electromagnetic pressure pulse source Dec. 20, 1994
5375101 Electromagnetic sonar transmitter apparatus and method utilizing offset frequency drive Dec. 20, 1994
5350352 Acoustic pressure pulse generator Sep. 27, 1994
5351220 Moving-coil electrodynamic electroacoustical transducer Sep. 27, 1994
5339286 Composite electroacoustic transducer Aug. 16, 1994
5305288 Variable reluctance acoustic projector Apr. 19, 1994
5299176 Balanced armature transducers with transverse gap Mar. 29, 1994
5269292 Pressure pulse source having a positive lens with a pressure sensor Dec. 14, 1993
5268879 Electro-acostic transducers Dec. 7, 1993
5251630 Pressure pulse generator having an electromagnetic pressure pulse source Oct. 12, 1993
5214620 Electrically driveable shockwave source May. 25, 1993
5207215 Acoustic pressure pulse generator May. 4, 1993
5206839 Underwater sound source Apr. 27, 1993
5199005 Electromagnetic drive assembly for under water sonar transducer Mar. 30, 1993
5191560 Sound wave generator for therapeutic purposes Mar. 2, 1993
5174280 Shockwave source Dec. 29, 1992
5165388 Electrodynamic shockwave generator with a superconducting coil arrangement Nov. 24, 1992
5137014 Coil for lithotripter Aug. 11, 1992
5126979 Variable reluctance actuated flextension transducer Jun. 30, 1992
5117403 Above and below water sound transducer May. 26, 1992
5012457 Aquatic transducer system Apr. 30, 1991
4924858 Electromagnetic shockwave generator transducer May. 15, 1990
4920955 Shock wave source May. 1, 1990
4901709 Shock wave source Feb. 20, 1990
4875199 Deep water transient sound generator Oct. 17, 1989
4868799 Means for equalizing the internal pressure in an underwater transducer employing a vibratile piston to permit operation of the transducer at water depths in excess of a few hundred feet Sep. 19, 1989
4821245 Electromagnetic transducer Apr. 11, 1989
4796724 Process and devices for producing pressure - or shear-waves in a solid medium Jan. 10, 1989

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