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7274650 Rodent repellent device of random working frequency  
A rodent repellent device of random working frequency is disclosed, which comprises: an application-specific integrated circuit (ASIC); a deterring module, electrically connected to the ASIC,...
6795156 Orientation inspector for liquid crystal display (LCD) cell  
An orientation inspector for LCD cell is utilized to inspect the LCD cell. The LCD cell includes two transparent substrates wherein the first transparent substrate is slightly bigger than the...
4675859 Intensified field focus moving coil phonocartridge assembly  
The invention is an intensified field focus moving coil phonocartridge assembly (10) including a rear magnet (32) and a front magnet (34) mounted in an axially juxtaposed manner within a support...
4558443 Moving coil type pickup cartridge  
An improved pickup cartridge of the kind including two moving coils is disclosed which is constructed such that a cantilever including a stylus tip at its foremost end is inclinably held by means...
4547874 Moving coil type cartridge mounted on cantilever within central opening of ring magnet  
Herein disclosed is a compact, highly reliable and inexpensive moving coil type cartridge comprising a ring-like magnet which is coaxially disposed with respect to a cantilever having a needle at...
4512009 Stylus for stereo pickups  
A stylus for stereo pickups tracking acoustic events mechanically recorded in grooves of a plate shaped record carrier comprises a soft iron tube which is adapted to embody a transducer and which...
4502135 Pickup cartridge having improved stylus flylead  
A pickup cartridge comprises a stylus arm having a stylus disposed at one end, and having the other end thereof flexibly supported in the cartridge. A flylead connects an electrode arranged on the...
4495611 Vibration system of pickup cartridge of record player  
In the vibration system of a pickup cartridge of a record player, the object of preliminarily applying a required deforming bias, in a direction opposite to the direction of the vertical tracking...
4494227 Stereo phono pick-up and/or cutter  
A phonograph pick-up or cutter has a stylus holder carrying a stylus, which cooperates with two transducers, one for each of two orthogonal directions of vibration. Each transducer has a flat coil...
4488284 Moving-coil type pickup cartridge  
In a moving-coil type pickup cartridge, a vibrating system including an armature wound with a coil is disposed at an open end area of a magnet with a damper being interposed between the armature...
4385375 Moving coil type phono cartridge  
An MC type phono cartridge which is simple in construction and easy to assemble and in which the stylus tip may be easily interchanged. The cartridge includes a pair of magnet units and an...
4382293 Signal pickup device in rotary recording medium reproducing apparatus  
A signal pickup device in a rotary recording medium reproducing apparatus comprises a cantilever having at a free distal end thereof a reproducing element for reproducing recorded signals from...
4345322 Pickup cartridge for reproducing signals recorded on a 45-45 stereophonic record disk  
In a pickup cartridge of the moving magnet type, the components of movement of a cantilever in the vertical and horizontal directions are individually detected to produce two kinds of electromotive...
4327433 Magnetic phono cartridge  
A pick-up phono cartridge in which the position of an armature disposed at a base end of a cantilever is made adjustable to thereby produce a desired output voltage. A vibrating system of the...
4281225 Pickup cartridge for reproducing signals recorded on a 45-45 stereophonic record disk  
A moving coil type pickup cartridge comprises at least two movement-electromagnetism conversion systems functioning in push-pull mode, each system being arranged by a coil supported on a plate and...
4272652 Moving coil type stereophonic pickup cartridge  
A moving coil type stereophonic pickup cartridge is disclosed wherein a pair of magnetic air gaps are established corresponding to the walls of the sound groove of a 45°-45° stereophonic record...
4263483 Moving coil pick-up assembly for use in a record player  
A pick-up assembly carried by a tone arm itself or a cartridge adapted to be connected to the tone arm includes a vibrating section and a magnetic circuit section. The vibrating section has a...
4233476 Moving coil type cartridge  
A moving coil type of carriage for reproduction of sound on stereo discs in which there are four substantially flat pole faces arranged in square configuration facing mutually inwardly to define a...
4220341 Pickup  
A phonograph pickup comprises the end portion of a cylindrical pole leg and an opposing yoke with an air gap therebetween, and a moving system including a stylus arm and an armature. A pivoting...
4218591 Phonograph cartridge with very hard metal ceramic frame  
A pick up cartridge which comprises a cantilever at the end of which is mounted, a stylus a generating mechanism which is fixed near the supporting point of the cantilever, a pair of yokes which...
4194744 Phonograph pick-up transducer using a one-piece bearing and inertial damper fabricated from different materials  
A magnetic stereo phonograph pick-up cartridge is disclosed. An elongated stylus and an attached permanent magnet are resiliently supported by a molded rubber bearing block which surrounds the...
4174111 Compressive pivot suspension system for an electromagnetic cartridge  
In a combined stylus and generator system, the combination with a stylus adapted to operate with a record groove and a generator moving in response to the movement of said stylus means for...
4161631 Pickup cartridge  
A pickup cartridge composed of a cantilever, a plate-shaped armature and a magnet or magnetic material. The plate-shaped armature is pivotally mounted to the cantilever and stretched backward by a...
4124783 Phonographic pickup  
A transducer comprises a body including a permanent magnet having a pair of pole pieces which define a magnetic gap therebetween, and a stylus assembly including a pair of coils which are...
4102536 Phonograph pickup device  
An improved phonograph pickup device having a pivotally mounted tone arm on which a drive coil and a sense coil are mounted and are coupled to a magnetic field. The level of current flow to the...
4090039 Electrodynamic transducer  
An electrodynamic transducer comprising a source of magnetic flux and poles that define an annular gap in the flux path to obtain a radially oriented and uniformly distributed magnetic flux across...
4075418 Stereophonic pickup cartridge  
A stylus sub-assembly for incorporation in a stylus assembly itself destined for use in a cartridge mounted on a tone arm of a record player, the stylus assembly being constituted of an integral...
4053721 Piezoelectric type pickup cartridge for stereo with pressing and intermediate members for coupling  
A piezoelectric type pickup cartridge comprises a cantilever, an intermediate member deformable in two orthogonal directions, a press member secured to the other end of said cantilever and adapted...
4037060 Stereophonic pickup cartridge  
A stereophonic pickup cartridge includes both a rod-shaped armature and a disk-shaped armature, both of which magnetically interact with the pole pieces of coils to improve the magnetic efficiency...
3991284 Gramaphone pickup  
A gramophone or phono pickup comprising two magnetic systems, which are rotatable concentrically to a permanent magnetic armature, which is the transducer element and supports the needle arm. Two...
3975025 Pickup cartridge  
In a stereophonic pickup cartridge which derives two or more than two electric signals from a stereophonic sound recording disk of so-called 45° -- 45° type, there is provided a displacement-type...
3952171 Stereo phonograph cartridge  
An improved stereo phonograph cartridge which provides direct coupling between the stylus signal motion and right and left channel transducers with minimal distortion of the record groove...
3766330 DISC RECORDING STYLUS DRIVER  
A drive coil assembly is provided for driving a stylus of a disc recording system. The assembly comprises a support member having an axis and an annular coil having a plurality of turns of...
3763335 PICKUP CARTRIDGE WITH MAGNET ARMATURE HAVING OPPOSITE AXIAL SIDES OF LIKE POLARITY AND CENTRAL PORTION OF OPPOSITE POLARITY  
A small-sized light stylus pressure pickup cartridge with superior characteristics having an armature comprising a permanent magnet plate with both of its sides magnetized in opposite polarity from...
3761647 CARTRIDGE FOR DETECTING VIBRATIONS REPRESENTING STEREOPHONIC SOUND  
A stereophonic pickup cartridge for reproducing two channel sound from record discs which are cut according to 45°--45° system, comprises one or more armatures of high magnetic permeability...
3745263 PHONOGRAPH PICKUP CARTRIDGE  
A phonograph pickup cartridge which has a stylus with a pair of driving arms engageable with the ends of a pair of tapered flexible members and formed with tapered openings therein so that the...
3731009 PHONOGRAPH PICKUP HAVING CAPACITIVE TRANSDUCER DIRECTLY COUPLED TO CANTILEVER STYLUS ARM  
A pickup device comprises a base in which an active circuit is assembled, and a transducer detachably mounted on the base and having a cantilever stylus arm extending therefrom. The transducer has...
3729596 ELECTRODYNAMIC SOUND PICKUP OR SOUND-TRACK CUTTING DEVICE  
An electrodynamic sound pickup which also functions as a sound-track cutting device, two angularly disposed preferably stereophonic recordings of an engraved sound track are sensed by a phonograph...
3720796 MULTICHANNEL PICKUP CARTRIDGE  
A multichannel pickup cartridge is provided with a cantilever arm having a stylus tip attached to one end thereof and a pair of magnet armatures attached to the other end thereof so as to extend in...
3699268 PHONOGRAPH PICKUP WITH SELF FORMED FEMALE RECEPTACLES  
A phonograph pickup includes a case having a top section and a bottom section. A single piece elastomer member includes a stylus beam coupler, a damping block, and two interconnecting support...
3694586 TOROIDAL ARMATURE STEREOPHONIC PICKUP  
A phonograph pickup for the reproduction of stereophonic and/or monaural sound recordings which is of a balanced and magnetic electrical structure and wherein a single elastomeric damping member is...
3683128 FLUX-BRIDGING STEREOPHONIC PICKUP  
A phonograph pickup for the reproduction of stereophonic and/or monaural sound recordings in which signals are induced without substantially disrupting the flux path of the several operating gaps...
3649775 ELECTRO-STATIC PHONOGRAPH PICKUP  
A phonograph pickup cartridge including an electrostatic transducer with an air chamber having flexible walls connected to the transducer, and a stylus and an arm for converting the movement of the...
3646279 INDUCED MAGNETIC MOVING IRON STEREOPHONIC PHONOGRAPH PICKUP WITH REPLACEABLE STYLUS ASSEMBLY AND ONE COMMON POLE PIECE  
A stereophonic phonograph pickup of the magnetic type is disclosed wherein the stereophonic output is produced by an elongated tubular armature of permeable material pivotally mounted at one end...
3610840 STEREOPHONIC PHONOGRAPH PICKUP WITH SINGLE PAD FOR PIEZOELECTRIC ELEMENT COUPLING, SUPPORT AND DAMPING  
A phonograph pickup includes a case having a top section and a bottom section. A single piece elastomer member includes a stylus beam coupler, a damping block, and two interconnecting support...
3538266 MAGNETIC PICKUP WITH INDUCING MAGNET AXIALLY ALIGNED WITH THE ARMATURE  
3531601 PHONOGRAPH PICKUP CARTRIDGE WITH SELECTIVELY SETTABLE COMPLIANCE  
3527900 STEREOPHONIC PHONOGRAPH PICKUPS HAVING A PAIR OF VERTICALLY ORIENTED BENDERTYPE BEAM TRANSDUCERS AND FORCE CHANGING COUPLER  
3525528 STEREOPHONIC PICK-UP  
3523690 PHONOGRAPH PICKUP  
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