Patents
Sitemap › G11 - Information storage › G11B - Information storage based on relative movement between record carrier and transducer › G11B 21 - Head arrangements not specific to the method of recording or reproducing
Patents for G11B 21 - Head arrangements not specific to the method of recording or reproducing (20,963)
11/1980
11/25/1980US4236232 Optical read apparatus for reading a disc-shaped record carrier
11/25/1980US4236105 Digital center tracking system
11/18/1980US4234837 Digital center tracking system
11/04/1980US4232201 Dithered center tracking system
10/1980
10/29/1980EP0018211A1 Tracking arrangement for a sensor of signals on an information track
10/15/1980EP0017433A1 Apparatus for tracking an information track on a recording medium
10/15/1980EP0017175A1 Data storage system and magnetic discs therefor
10/14/1980US4228326 System for recording information on a rotatable storage disc, in a substantially uniform recording density
10/07/1980US4226018 Method for manufacturing a floating type thin film magnetic head
10/07/1980CA1087307A1 Pickup cartridge
09/1980
09/30/1980US4225891 Fly off platform for magnetic transducers having means for reducing unstick time
09/23/1980CA1086424A1 Video disc playback system and pickup cartridge therefor
09/17/1980EP0015383A1 Magnetic head slider assembly
09/16/1980US4223359 Flexible magnetic disk recording apparatus
09/16/1980CA1085901A1 Electromagnetic induction actuator for magnetic disc file
09/02/1980US4220340 Constant drag carriage translating mechanism for video disc player
08/1980
08/26/1980CA1084621A1 Magnetic disc, especially a flexible magnetic disc, for track adjustment and amplitude control
08/20/1980EP0014231A1 Information storage apparatus
08/19/1980US4218715 Magnetic head slider assembly
08/19/1980US4218714 Double side type flexible magnetic disc drive apparatus
08/19/1980US4218643 Braking system for loaded stepping motor
08/12/1980US4217612 Servo system for track accessing and track following in a disk drive
08/12/1980US4216969 Carriage translating apparatus for video disc player
08/05/1980US4216505 Transducer head vibration dampening
08/05/1980CA1083246A1 Trace locator for a multi-trace recorder
07/1980
07/29/1980US4215362 Track selection method and apparatus
07/29/1980CA1082605A1 Record player with linearly moving reproducing stylus
07/22/1980US4214287 Novel TSF head pair for dual recording on flexible disks
07/22/1980CA1082359A1 Recording, reproducing and automatic translation device and related medium
07/15/1980US4213148 Recording/playback apparatus using a single pilot tone for active tracking and control of a video disc pickup device
07/09/1980EP0012885A1 Control apparatus for an electrical stepping motor
07/09/1980EP0012844A1 Transducer carriage assembly
07/08/1980US4212044 Platform for magnetic transducers having dust diverter means
06/1980
06/25/1980EP0012650A1 Device for acceding to a track on an optically recordable or readable carrier and optical system comprising such a device
06/24/1980US4209811 Device for automatically recording, reproducing and translating, and corresponding circuit
06/17/1980US4208684 Damper for constant load arm
06/17/1980US4208679 Transducer positioning system for rotating disk drive units
06/17/1980CA1079848A1 Disk storage apparatus having signals recorded in a specific format
06/17/1980CA1079846A1 Record track following and seeking
06/17/1980CA1079845A1 Data storage apparatus
06/17/1980CA1079538A1 Electronic tachometer with variable bandwidth differentiator
06/11/1980EP0011990A1 System and apparatus for centering a light beam on an information track
06/11/1980EP0011831A1 Position shift apparatus
06/03/1980US4206489 Device for the automatic loading/unloading of at least one magnetic head in a magnetic disc drive
06/03/1980CA1078959A1 Tracking control system for magnetic video recording and reproducing system
05/1980
05/28/1980EP0011495A1 Method and apparatus for rotating an information storage disc
05/28/1980EP0011425A1 A method for accessing a disc in a flexible disc memory
05/28/1980EP0011149A1 Positioning device for magnetic heads
05/27/1980US4205355 Flexible disk drive apparatus
05/27/1980US4205338 Disc recording tracking system
05/27/1980CA1078513A1 Actuator mechanism for disk storage apparatus
05/27/1980CA1078512A1 Positioning system for data storage apparatus
05/27/1980CA1078511A1 Process for controlling the starting and stopping of the reading of a recording support
05/20/1980US4204234 System for positioning single gap magnetic head to follow moving recorded data track
05/14/1980EP0010664A1 Method and apparatus for positioning a transducing head
05/13/1980CA1077620A1 Storage disk and read/write system
05/06/1980US4202020 Magnetic head load control system
05/06/1980US4202019 Timing circuit and method for a track following servo in a data storage system
04/1980
04/30/1980EP0010494A1 Method of writing information on a magnetic-recording carrier
04/30/1980EP0010172A2 Magnetic disk file machine
04/29/1980US4200827 Positioning system employing feedforward and feedback control
04/22/1980US4199820 Random access storage apparatus with a movable recording medium
04/22/1980US4199149 Record player
04/22/1980US4198871 Transducer positioning apparatus
04/22/1980CA1076256A1 Stylus arm lifting/lowering apparatus for a video disc player
04/16/1980EP0009663A1 Electronic tachometer circuit
04/15/1980US4198658 Recording/playback apparatus facilitating track skip detection
04/15/1980CA1075807A1 Transducer positioning system
04/08/1980US4197566 Floating head slider holding apparatus and its use
04/01/1980US4196456 Magnetic head pivotal support with compact drive means
04/01/1980CA1074912A1 Disc drive linear actuator and control system therefor
03/1980
03/25/1980US4195322 Record/playback head and data storage apparatus therefor
03/25/1980US4195320 Record track identification and following
03/25/1980CA1074422A1 Record storage apparatus employing enhanced transducer positioning servomechanisms
03/19/1980EP0008670A1 Information transducer load control system and method, particularly applicable in a magnetic disk drive apparatus
03/18/1980CA1074007A1 Disc record groove skipper apparatus
03/11/1980US4193102 Disk file machine with cable connection to transducers
03/04/1980US4191981 Record storage apparatus employing enhanced transducer positioning servomechanisms
03/04/1980CA1073100A2 Dynamic focussing of video disc objective lens
03/04/1980CA1073099A1 Electric control system for magnetic sheet recording and reproducing apparatus for audiovisual instruction
02/1980
02/26/1980US4190859 Tracking control apparatus for use in apparatus for reproducing video signals from a rotary recording medium
02/19/1980US4189759 Cantilevered head support arm having increased resonance frequency
02/19/1980CA1072207A1 Recording apparatus for magnetic disks using both sides of the disk
02/12/1980US4188646 Sectorized data path following servo system
02/12/1980US4188645 Piezoelectric servo for disk drive
02/12/1980CA1071768A2 Light beam path for reading video discs
02/06/1980EP0007548A1 A dual magnetic recording assembly for a flexible record member
02/06/1980EP0007401A1 Magnetic transducer head support assemblies
01/1980
01/29/1980CA1070834A2 Video disc player
01/23/1980EP0007199A1 Method and apparatus for information retrieval from an optically readable storage medium
01/22/1980CA1070424A1 Disc record groove skipper
01/22/1980CA1070422A1 Magnetic disk storage apparatus
01/15/1980US4184178 Drop-out compensator for sound reproducing apparatus during tape reversal
01/15/1980US4184108 Self-regulating electronic tachometer
01/15/1980CA1070014A1 Playback apparatus, in particular a video player
01/08/1980US4183059 Track skipper for a video disc player
01/01/1980CA1069215A Video disc beam tracking apparatus
12/1979
12/25/1979CA1068818A Method of fabricating stainless steel aluminum rotor
12/18/1979CA1068399A1 Disk file access mechanism
12/12/1979EP0005966A1 Positioning servo system
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