Matches 151 - 200 out of 247 < 1 2 3 4 5 >
Match Document Document Title
4481614 Velocity correction apparatus for disc record player  
A velocity correction apparatus for a disc record player includes a permanent magnet attached to a cartridge mounted pickup arm and an electromagnetic coil secured in a cartridge supporting...
4481550 Method and apparatus for following a recorded data track with a read head  
A playback head (155) is moved across a recording medium (151) orthogonally to a data track by playback head-moving means (157, 159, and 161), said data track being independently moved so that...
4479208 Signal pickup device for capacitance disk records  
A signal pickup device for capacitance disk records comprises within a housing a stylus control unit responsive to a control signal to counteract the jitter movement of a capacitance detection...
4470078 Pulse driven control circuit for moving a transducer across a rotary recording medium of pulses applied thereto  
A control circuit causes a reproducing transducer feeding motor to move the transducer radially across a disc having a video signal recorded thereon. The video signal is recorded along a spiral...
4463388 Rotary recording medium capable of performing special reproduction  
An apparatus reproduces signals which are recorded on a rotary medium having a main information signal recorded on a spiral main track, with first and second tracking control reference signals...
4442516 Drive mechanism for disc player with bearing supported slider  
A reading device drive mechanism for a video disk player including a chassis, a pair of guide rails mounted parallel to one another on the chassis, a slider contacting corresponding sides of the...
4439791 Slow-motion reproducing system in an apparatus for reproducing rotary recording medium with mode dependent skip pulse generator and field memories  
Slow-motion reproducing system is applied to an apparatus for reproducing video signals from a rotary recording medium on which the video signals of a plurality of fields each are recorded along a...
4434482 Tone arm pick up system  
A tone arm system for a high fidelity record player is provided having servo-controlled record warp compensation means. One or more feedback loops are employed to apply a variable force vertically...
4433402 Reference signal detection circuit in a rotary recording medium reproducing apparatus  
A reference signal detection circuit in a rotary recording medium reproducing apparatus has a reproducing transducer for reproducing an information signal recorded in a rotary recording medium and...
4432021 Rotary recording medium reproducing apparatus  
A rotary recording medium reproducing apparatus reproduces a rotary recording medium having a spiral video signal track recorded with a video signal by use of a reproducing element, where the...
4429379 Device for controlling tone arm carrying moving coil type pickup  
Moving coils of a phonograph pickup are made of a substance having magnetoresistance so that the electrical resistance of the coils are detected by means of bridge circuits. The amounts of...
4429376 Video disc stylus deflector system  
A video disc player apparatus having a signal pickup stylus secured to a stylus arm for recovering recorded signal from a disc record, wherein the stylus arm is mechanically biased by a spring...
4428003 Periodical signal detection circuit in a reproducing apparatus  
A periodical signal detection circuit is designed for use in an apparatus which reproduces an information signal and a periodical signal from a recording medium. A separation circuit separates the...
4426692 Rotary recording medium having an improved three frequency pickup tracking control and reproducing apparatus therefor  
A rotary recording medium has at least one surface on which a spiral main track is formed with a reference signal track disposed centrally between mutually adjacent track turns. The track turns of...
4423495 Method and apparatus for recording optically an information signal on a record medium along tracks  
In a method and apparatus of recording optically an information signal on a disc along tracks by projecting a main beam modulated with the information signal onto the rotating disc by means of an...
4420827 Disc reproducing system  
An information signal recording medium of rotary type has a flat surface with first succession of pits formed therein as respective concavities in response to a first signal and with second...
4413334 Pickup arm with servo-controlled stylus  
A capacitance detection type stylus is attached to the free end of a cantilever which is supported on a vertically movable resilient pivot. A permanent magnet is fixed to the movable pivot. A...
4412319 Video disc player with self calibrating stylus translator  
An adaptive video disc record stylus kicker system for inducing limited stylus translation radially across the disc record. Control circuitry responsive to track identification signals recorded on...
4408311 Optical tracking apparatus  
An optical tracking apparatus for tracing a spiral track on a recording disk includes an optical pickup device having a semiconductor laser and a photoelectric conversion element; an arm device...
4404599 Laser recording information and pilot signals for tracking on a grooveless recording  
An information signal recording system records an information signal, a first and a second reference signals for tracking control, and a third reference signal for switching the first and second...
4403259 Apparatus for reading information from an information recording disc  
An apparatus for reading information from an information recording disc in which the information is recorded successively in the circumferential direction, which includes a timing signal generator...
4402070 Transfer control device for a reproducing transducer in a rotary recording medium reproducing apparatus  
A transfer control device for a reproducing transducer in a rotary recording medium reproducing apparatus having a reproducing transducer for reproducing recorded signals from a rotary recording...
4400807 Stylus position detecting apparatus  
A stylus position detecting apparatus in use for a video disc player using a disc of the groove type, detecting plates for detecting leakage components of a high frequency signal supplied from a...
4392160 Playback system for video disk having plural information tracks  
A video disc has first and second information tracks adjacently formed thereon, and first and second FM signals with different frequency bands are recorded on the first and second information...
4382292 Video disc player having stylus position sensing apparatus  
In a video disc player, a stylus arm, having a track-following stylus at one end thereof, has its other end secured to a pickup cartridge by means of a compliant member. A conductive flylead...
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...
RE31223 Track skipper for video disc player  
In a video disc player, a carriage is subject to translatory motion in correlation with radial motion of a playback stylus relative to a disc record disposed on a rotatable turntable. A stylus arm...
4376956 Video disc player having timebase correction and constant angular velocity turntable  
The burst component of a video signal recovered from a video disc record is applied to a timebase correction servo for controlling the tangential position of the player pick-up transducer in a...
RE31160 Tracking control apparatus for use in apparatus for reproducing video signals from a rotary recording medium  
A tracking control apparatus is employed in apparatus for reproducing video signals from a rotary recording medium. A reproducing transducer is used for reproducing recorded signals in which a main...
4375094 Apparatus for advancing a video disc pickup transducer beyond a disc record defect  
Video disc player apparatus for aiding the signal recovery stylus to overcome locked grooves insurmountable by normal stylus deflection transducers. The player comprises a signal pickup stylus...
4371960 Measurement of disc servo head/data head misalignment  
Compensation for radial misalignment between a data head and a servo head is provided. At least one pair of servo data tracks having a servo null there between are written on each data surface. The...
4371959 Position sensor for video disc  
A stylus position sensor for a video disc player is described. An electrode secured in fixed relation to a movable stylus with respect to the stylus supporting carriage is disposed between first...
4370740 Rotary recording medium  
A rotary recording medium has an information signal along a spiral main track comprising a multiplicity of successively adjacent track turns of respective track turn numbers, first and second...
4366563 Video disc stylus suspension apparatus  
A system for suspending a video disc signal pickup stylus arm incorporated with a permanent magnet which is part of a motive means for providing stylus-disc velocity corrections. The permanent...
4363117 Video disc with dynamic stylus cleaning  
A video disc playback system having digital circuitry for detecting degradation in recovered signal. Circuitry is included to determine probable errors in the digital components of signal recovered...
4351044 Recording system using disk-shaped recording medium  
A recording system of the type wherein the information is recorded on a spiral track on a disk-shaped recording medium, which is rotated by a signal transducer which is moved radially with respect...
4340956 Minimum tracking force stylus  
In a video disc player of the type having a signal pickup stylus engaging a disc record for recovering prerecorded information signals, an electromechanical transducer is arranged to cooperate with...
4334276 Disc eccentricity measuring means  
A data storage file for use with removable media is provided with media bearing servo information indicative of its desired center of rotation. The data storage file is also provided with media...
4331976 High density recording system using side-by-side information and servo tracks  
An information signal recording system records both an information one and at least one single kind of reference signal for providing a tracking control on a recording medium. The reference signal...
4327434 Video disc stylus position sensor system  
A stylus position sensor for a video disc player apparatus. An electrode secured in fixed relation to a movable stylus is disposed between first and second electrodes to form first and second...
4327430 Information signal recording medium of rotary type with overlapped tracks  
An information signal recording medium of rotary type has a flat surface with successions of pits formed therein as respective concavities in response to an information signal. The successions of...
4323998 Video disc locked groove corrector  
A video disc player having an adaptive bumper apparatus which tracks the signal pickup stylus to maintain a fixed spatial relation therebetween. The bumper is fixed to an electromechanical...
4322748 High-speed reproducing system in apparatus for reproducing information signals recorded on a rotary recording medium  
A high-speed reproducing system is employed in an apparatus for reproducing signals from a rotary recording medium having an information signal recorded in the track formed thereon in a spiral path...
4320487 Video disc stylus control apparatus  
A video disc player having a signal pickup stylus for engaging a disc record is equipped with a steering device to provide three degrees of motion to the stylus. The stylus is secured to a stylus...
4320490 Video disc cartridge having a self retaining electrode  
A cartridge for a video disc stylus having a stylus-position sensor, including an electrode mounted to the cartridge walls. An appendage is provided on the cartridge wall to position the sensor...
4313134 Track error correction system as for video disc player  
In a system for correcting tracking errors in a video disc player, digital information, corresponding to field numbers is encoded on the video signal during one horizontal line of the res ective...
4313189 Stylus position sensor for video disc player apparatus  
In certain video disc systems it is desirable to have a stylus position sensing apparatus. An electrode secured in fixed relation to a movable stylus is disposed between first and second electrodes...
4310914 Skipper-assisted active search  
Apparatus in a video disc player for previewing or scanning information on a record disc. A position sensor detects the position of a playback stylus relative to the carriage assembly for...
4310912 Servo system for recording and/or reproducing apparatus using a rotatable recording carrier  
In a recording and/or reproducing apparatus having a rotated record carrier, for example, in the form of a disc, adapted to have video or other signals optically recorded in successive turns of a...
4310913 Stylus tracking aid using two bimorph elements longitudinally aligned  
A stylus assembly for use with a high density information record such as a grooved video disc. The stylus arm includes a first transducer for detecting lateral forces applied by the record groove...
Matches 151 - 200 out of 247 < 1 2 3 4 5 >