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Class Information
Number: 369/147
Name: Dynamic information storage or retrieval > Specific detail of information handling portion of system > Mechanical modification or sensing of storage medium > Specified structure of electrical transducing assembly > Magnetic field variation (e.g., magnetostrictive) > Moving signal coil
Description: Subject matter wherein the information signal is generated by, or causes movement of, a coil rigidly connected to the stylus within a magnetic field.

Patents under this class:

Patent Number Title Of Patent Date Issued
8593929 Moving coil type pick up cartridge assembly Nov. 26, 2013
RE44117 Lens driving apparatus Apr. 2, 2013
RE43644 Lens driving apparatus Sep. 11, 2012
8037488 Optical pickup device Oct. 11, 2011
7649703 Lens driving apparatus Jan. 19, 2010
6885116 Moving coil linear motor positioning stage with a concentric aperture Apr. 26, 2005
4937171 Photosensitive recording material Jun. 26, 1990
4884262 Magnetic system for a stereo pick-up with a movable coil Nov. 28, 1989
4675859 Intensified field focus moving coil phonocartridge assembly Jun. 23, 1987
4637009 Grounding circuit for pickup cartridge moving coil Jan. 13, 1987
4558443 Moving coil type pickup cartridge Dec. 10, 1985
4547874 Moving coil type cartridge mounted on cantilever within central opening of ring magnet Oct. 15, 1985
4532620 Coil assembly having stacked spiral pattern layers and method of making Jul. 30, 1985
4494227 Stereo phono pick-up and/or cutter Jan. 15, 1985
4488284 Moving-coil type pickup cartridge Dec. 11, 1984
4455639 Moving coil type pickup cartridge Jun. 19, 1984
4429379 Device for controlling tone arm carrying moving coil type pickup Jan. 31, 1984
4397012 Electrodynamic pickup cartridge having simplified coil structure Aug. 2, 1983
4385375 Moving coil type phono cartridge May. 24, 1983
4376304 Moving coil type stereophonic pickup cartridge Mar. 8, 1983
4374433 Stereo pickup with printed circuit coils mounted in a linear field Feb. 15, 1983
4364120 Pickup cartridge of moving coil type for phonograph Dec. 14, 1982
4327433 Magnetic phono cartridge Apr. 27, 1982
4317191 Moving coil pickup cartridge Feb. 23, 1982
4281225 Pickup cartridge for reproducing signals recorded on a 45-45 stereophonic record disk Jul. 28, 1981
4263483 Moving coil pick-up assembly for use in a record player Apr. 21, 1981
4251695 Pickup cartridge having means for producing magnetic fields of opposite directions for coil plate Feb. 17, 1981
4246446 Moving coil pick-up with coils printed on opposite sides of waver Jan. 20, 1981
4238646 Pickup cartridge for reproducing signals recorded on a 45--45 stereophonic record disk Dec. 9, 1980
4237349 Compact moving-coil pickup of low weight and high quality Dec. 2, 1980
4233476 Moving coil type cartridge Nov. 11, 1980
4209670 Moving-coil type pickup cartridge Jun. 24, 1980
4179589 Phono cartridge Dec. 18, 1979
4161631 Pickup cartridge Jul. 17, 1979
4160268 Signal pickup device with tracking control and jitter compensation for a video disc Jul. 3, 1979
4145582 Moving coil pickup having a substantially square magnetic armature mounted in an air gap adjacent a square face magnetic member Mar. 20, 1979
4138122 Pickup Feb. 6, 1979
4093833 Moving coil cartridge with magnetic means to affix stylus holder to cartridge casing Jun. 6, 1978
4090039 Electrodynamic transducer May. 16, 1978
4075418 Stereophonic pickup cartridge Feb. 21, 1978
4011417 Dynamic type pickup Mar. 8, 1977
3963880 Moving coil-type cartridge Jun. 15, 1976
3956598 Moving coil pickup cartridge with diaphragm coupling May. 11, 1976

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