Patents
Sitemap › H04 - Electric communication technique › H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; Deaf-aid sets; Public address systems › H04R 9 - Transducers of moving-coil, moving-strip, or moving-wire type
Patents for H04R 9 - Transducers of moving-coil, moving-strip, or moving-wire type (11,486)
11/1983
11/08/1983US4414437 Moving coil dynamic transducer
11/01/1983US4413162 Moving coil transducers using multiple-stranded coils
11/01/1983US4413161 Electro-acoustic transducer
11/01/1983US4413160 Ribbon-type loudspeaker
10/1983
10/25/1983US4412104 Rectangular magnetic circuit for speaker
10/18/1983US4410768 Electro-acoustic transducer
10/04/1983CA1154690A1 Digitally driven combination coils for electrodynamic acoustical transducers
08/1983
08/31/1983EP0087177A1 Electro-acoustic transducer having a diaphragm comprising a layer of polymethacrylimide foam
08/16/1983US4399334 Speaker unit for headphones
08/16/1983US4398972 Ferritic Fe-Ni magnetic alloys
08/04/1983WO1983002708A1 Full range planar induction loudspeaker
07/1983
07/26/1983US4395598 Electro-acoustic transducer causing sound waves to be in phase at any point by preventing reflection from the back end of the diaphragm to stress applying means
07/26/1983US4395592 Ribbon loudspeaker
07/06/1983EP0083310A1 Electro-acoustic transducer
07/06/1983EP0083045A2 Magnetic system with annular air-gap, in particular for woofers
07/05/1983US4392027 Method and apparatus for providing a uniform sound distribution in an aircraft cabin
06/1983
06/22/1983EP0081780A1 Electrodynamic transducer
06/08/1983EP0080639A1 Method of generating a speed-proportional voltage, and circuit arrangement for applying the method
06/07/1983US4387275 Speaker and speaker system
05/1983
05/31/1983US4386332 Magnetic circuit for dynamic speaker
05/31/1983CA1147448A1 Audio-band electromechanical vibration converter
05/26/1983WO1983001884A1 Loudspeaker assembly
05/24/1983US4385375 Moving coil type phono cartridge
05/17/1983US4384174 Moving voice coil loudspeaker, peripheral diaphragm support, diaphragm construction, bobbin to diaphragm reinforcement
05/17/1983US4384173 Electromagnetic planar diaphragm transducer
04/1983
04/26/1983CA1145425A1 Coil assembly
04/20/1983EP0077228A2 Electroacoustic transducer
04/19/1983US4380689 Electroacoustic transducer for hearing aids
04/12/1983US4379952 Mechanical filter for an electrodynamic transducer
04/12/1983US4379951 Electro-acoustic transducer means
04/05/1983US4379213 Electroacoustical converter
03/1983
03/29/1983US4378471 Horn speaker with linear grooves in a front surface of a pole piece of a yoke
03/23/1983EP0074424A1 Electroacoustic, in particular electrodynamic, transducer protected from moisture and dirt and in particular from iron particles
03/08/1983US4376304 Moving coil type stereophonic pickup cartridge
03/08/1983US4376233 Securing of lead wires to electro-acoustic transducers
03/02/1983EP0072991A2 Speaker system
02/1983
02/22/1983US4374624 Sound emitting device for electronic timepiece
02/22/1983CA1141856A1 Multi-filar moving coil loudspeaker
02/15/1983US4374433 Stereo pickup with printed circuit coils mounted in a linear field
01/1983
01/11/1983CA1139234A1 Pickup cartridge of moving coil type for phonograph
01/11/1983CA1139233A1 Moving coil type stereophonic pickup cartridge
01/04/1983US4367377 Horn loudspeaker with particular suspension and lead wire passage
12/1982
12/28/1982US4365680 Force measuring device
12/14/1982US4364120 Pickup cartridge of moving coil type for phonograph
12/14/1982CA1137618A1 Voice coil bobbin connection to loudspeaker diaphragm of honeycomb core sandwiched by sheets
12/01/1982EP0065883A2 Ring radiator for loudspeakers
12/01/1982EP0065808A2 Ribbon-type electro-acoustic transducer with low distortion and improved sensitivity
11/1982
11/30/1982CA1136554A1 Overlay-coil speaker with direct coupling
11/23/1982US4360707 Digitally driven combination coils for electrodynamic acoustic transducers
11/23/1982CA1136261A1 Loudspeaker and a method of producing the same
11/17/1982EP0064553A1 Electro-acoustic transducers
11/02/1982US4357498 Coaxial type multi-way planar diaphragm loudspeaker system
10/1982
10/27/1982EP0063392A1 Pick-up and/or cutter
10/13/1982EP0062600A1 Electrodynamic loudspeaker for low and medium sound frequencies
10/13/1982EP0062336A1 Arrangement and method for cutting information into a metallic groove carrier
10/13/1982EP0062201A1 Electro-acoustic transducer
10/12/1982US4354067 Audio-band electromechanical vibration converter
10/12/1982US4354066 Rigid-diaphragm transducer with plural coils
10/12/1982US4353432 Electro-dynamic speaker
08/1982
08/31/1982CA1130911A1 Loudspeaker
08/31/1982CA1130910A1 Electro-acoustic transducer
08/17/1982US4345322 Pickup cartridge for reproducing signals recorded on a 45-45 stereophonic record disk
07/1982
07/27/1982US4341930 Electrodynamic loudspeaker
07/20/1982US4340787 Electroacoustic transducer
07/20/1982CA1128194A1 Electroacoustic transducer with magnetic flux directed slantly across a diaphragm
07/14/1982EP0055841A1 Electrodynamic loudspeaker with diaphragm in the form of a dome
07/06/1982US4338489 Headphone construction
06/1982
06/30/1982EP0054945A1 Speaker for automotive vehicle audio system
06/29/1982US4337379 Planar electrodynamic electroacoustic transducer
06/29/1982CA1126661A1 Moving coil pickup cartridge
06/22/1982US4336425 High frequency compression driver and method of manufacture thereof
06/08/1982US4334127 Magnetic circuit for planar diaphragm type loudspeaker
06/01/1982CA1124560A1 Eletromagnetic acoustic transducer with its air gap established at assembly by counteracting springs
05/1982
05/18/1982US4330878 Sound producing device for watches
05/13/1982WO1982001636A1 Electroacoustic converter
05/11/1982CA1123506A1 Adjustable dual spider for a loudspeaker
05/04/1982CA1123090A1 Membrane type electro-acoustic transducer
04/1982
04/27/1982US4327433 Magnetic phono cartridge
04/27/1982US4327257 Alignment device for electro-acoustical transducers
04/06/1982US4323737 Driver unit for planar diaphragm type loudspeaker
03/1982
03/30/1982US4322584 Voice coil bobbin for planar diaphragm
03/30/1982US4322583 Voice coil bobbin connection to loudspeaker diaphragm of honeycomb core sandwiched by sheets
03/24/1982EP0048116A1 Moving coil loudspeaker
03/16/1982US4320264 Loudspeaker with a heat resistant two-part diaphragm
03/16/1982US4320263 Dynamic transducer with moving coil in an air gap filled with magnetic liquid
03/09/1982US4319096 Line radiator ribbon loudspeaker
03/02/1982US4317966 Vibratory ribbon speaker
03/02/1982US4317965 Thin miniaturized dynamic-type loudspeaker
02/1982
02/23/1982US4317191 Moving coil pickup cartridge
02/23/1982US4317009 Coldproof reflex horn speaker
02/09/1982US4315112 Speaker
01/1982
01/26/1982US4313040 Electro-acoustic transducer with free edge diaphragm
01/26/1982US4312118 Method for producing speaker construction
12/1981
12/29/1981CA1115217A1 Moving-coil pickup
12/15/1981US4306121 Electro-acoustic transducer assembly
12/02/1981EP0040948A1 Method of making an electro dynamic transducer
12/01/1981US4303806 Dynamic electroacoustic transducer having a moving coil in an air gap filled with a magnetic liquid
12/01/1981US4303142 Combined acoustical transducer and grille
11/1981
11/18/1981EP0039740A1 Loud-speaker
11/17/1981US4300655 Acoustic diaphragm for speakers and method of producing the same
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