| Patent Number |
Title Of Patent |
Date Issued |
| RE34810 |
Fast acting phase shifting apparatus for use in digital sampling systems |
December 27, 1994 |
| A method and apparatus is disclosed for controlling the sampling of a composite analog color video signal so that the analog signal is sampled at precise locations relative to the phase of the color subcarrier of the color video signal in the absence of modulation. The invention thereby |
| RE31311 |
DC Free encoding for data transmission system |
July 12, 1983 |
| A method and apparatus provide for the elimination of any net DC component from the transmission of binary data sequentially in successive clocked bit cells of a transmission channel wherein logical first bit states, e.g., 0's are normally transmitted as signal transitions relatively ear |
| RE30395 |
21/2D Core memory |
September 2, 1980 |
| A large, 2 wire, 21/2D core memory includes four, 1K (1024) by 1280, core frames with 1280 Y conductors each stringing and inductively coupling a column of 1024 cores in each of the four frames and 4K orthogonal X conductors each stringing and inductively coupling one row of 1280 cores. |
| RE29529 |
Equalization circuit |
January 31, 1978 |
| A frequency equalization circuit includes an active filter circuit. The filter circuit differentiates the input signal. A plurality of adjustable resistances are connected to the differentiator corresponding to a plurality of operating or frequency ranges. A switch selects one resist |
| RE29476 |
Method for fabricating a dielectric filled ferrite toroid for use in microwave devices |
November 22, 1977 |
| The process provides practical manufacture of a two-piece, dielectric filled, ferrite toroid assembly while providing optimum electromagnetic characteristics presently not consistently available by manufacturing the toroid in a pressed one-piece configuration. A pair of complementary |
| RE28823 |
Switching sequence detector for PAL color television |
May 18, 1976 |
| A time-base correcting system primarily adapted for use in video tape recording equipment and providing synchronous lockup and time base corrected operation of the video-tape recorder in the playback mode. The system includes circuitry receiving phase alternating line (PAL) composite |
| D309455 |
Video switcher |
July 24, 1990 |
|
| D303256 |
Video tape cartridge recorder/reproducer |
September 5, 1989 |
|
| D296434 |
Disk drive control panel |
June 28, 1988 |
|
| D294493 |
Control panel for a videotape recorder |
March 1, 1988 |
|
| D293623 |
Weatherproof carrying case for a video recorder or the like |
January 12, 1988 |
|
| D285924 |
Data processing set |
September 30, 1986 |
|
| D284776 |
Clip board |
July 22, 1986 |
|
| D280616 |
Magnetic tape transport |
September 17, 1985 |
|
| D280510 |
Video special effects editing console |
September 10, 1985 |
|
| D278062 |
Tape transport |
March 19, 1985 |
|
| D267063 |
Drawing table |
November 30, 1982 |
|
| D248298 |
Tape transport |
June 27, 1978 |
|
| D248100 |
Magnetic tape transport |
June 6, 1978 |
|
| D248099 |
Tape transport |
June 6, 1978 |
|
| 6724826 |
Method and apparatus for improving the image quality of transmitted video signals via pre-filter |
April 20, 2004 |
| A method and apparatus is disclosed which minimizes the visual artifacts normally generated when images are compressed for transfer through very narrow band channels such as, for example, the Internet. To this end, the images are pre-filtered and then scaled down prior to compression usi |
| 6457928 |
Inter-row transfer unit for moving tape cartridges between rows of library systems |
October 1, 2002 |
| An easily installed inter-row transfer unit is disclosed employing a movable cartridge bin assembly suspended via linkage from a pair of bearing blocks, wherein the resulting bin assembly carriage travels horizontally along a support housing extending between front-to-back arrangemen |
| 6438623 |
Transfer unit extending between two or more cabinets for expansion of tape library systems |
August 20, 2002 |
| A relatively simple and easily installed transfer unit is disclosed employing a movable cartridge bin assembly which travels horizontally between two or more cabinets of respective tape cartridge library systems, to enable the expansion of individual library systems thereby increasing |
| 6124993 |
Digital servo track format with leading and trailing identifiers |
September 26, 2000 |
| A digital servo track pattern for a magnetic medium which can be recorded and reproduced by a recording and reproducing system. The servo track pattern has a plurality of digital mark patterns recorded thereon, each of said digital mark patterns having a leading identifier field of digit |
| 6111718 |
Electronic record/play switch with low noise low input impedance preamplifier |
August 29, 2000 |
| The present application discloses an electronic switching device in combination with a low noise, low input impedance preamplifier circuit. The resulting electronic preamp assembly is specifically configured so that it can be directly interchanged with existing mechanical relay/pream |
| 6082653 |
System for estimating tape pack radius using a Kalman filter |
July 4, 2000 |
| A tape system that uses a Kalman filter to produce both an estimate of the tape pack radius and an estimate of the associated estimation error variance. The Kalman filter produces the estimates based on current and prior angular estimation position measurements of the reel, capstan, and |
| 6081401 |
Step gap head tracking servo |
June 27, 2000 |
| A read/write magnetic head includes a step offset formed in the gap of the head which accordingly generates recorded transitions in a recording medium which also contain a step offset in each successively recorded transition along the length of a track. On subsequent playback of the |
| 6076142 |
User configurable raid system with multiple data bus segments and removable electrical bridges |
June 13, 2000 |
| A user configurable RAID system designed to provide RAID functions as well as mass storage functions in a non-RAID mode. Flexibility is built into the system to allow the user to configure the SCSI bus to which removable drive modules are connected into one or more channels to define som |
| 6043947 |
Magnetic storage and reproducing system with a low permeability keeper and a self-biased magneto |
March 28, 2000 |
| A magnetic storage system includes a magnetic storage medium comprising a keeper layer of relatively low permeability soft magnetic material deposited upon a magnetic storage layer or between multiple magnetic storage layers. The low permeability keeper layer may be disposed either a |
| 6023396 |
Magnetic head tip design to reduce dynamic spacing loss and improve signal quality in high-densi |
February 8, 2000 |
| Improved magnetic tip designs attain low spacing loss and enhance the channel output signal while extending head life. One embodiment includes a relatively flat tape contacting surface whose outer edges are modified to provide a tape contacting surface of dumbbell or bow-tie shape, that |
| 5930398 |
Method and apparatus for determining a quantizing factor for multi-generation data compression/d |
July 27, 1999 |
| The invention provides techniques for changing the quantization used in multiple generations of selected complexity of data quantization such that the errors incurred in subsequent generations are substantially the same as the error incurred in a generation given the same complexity of d |
| 5872667 |
Mechanical operations and volume format identifying system zones for tape media |
February 16, 1999 |
| There is described a tape format and a method for formatting a length of magnetic tape with a number of system zones. Each system zone contains an area for mechanical load/unload operations or threading operations and an area containing volume format information for the entire magnetic m |
| 5870260 |
Magnetic recording system having a saturable layer and detection using MR element |
February 9, 1999 |
| A magnetic storage system is disclosed that includes a magnetic storage layer associated with a soft magnetic saturable keeper layer. A transducer is spaced from the storage layer and the keeper layer in flying relationship thereto, with an MR element contained therein to provide high |
| 5861220 |
Method and apparatus for providing a magnetic storage and reproducing media with a keeper layer |
January 19, 1999 |
| A magnetic storage medium comprises a keeper layer of soft magnetic, saturable material disposed upon a magnetic storage layer. The keeper layer is disposed above the magnetic storage layer, and a non-magnetic "break" layer may be used between the keeper and the storage layer to redu |
| 5843565 |
Particulate magnetic medium utilizing keeper technology and methods of manufacture |
December 1, 1998 |
| The flexible, particulate magnetic storage medium includes a substrate and a magnetic storage layer of hard magnetic particles held within a binder. The flexible, particulate magnetic storage medium also includes a soft magnetic keeper layer. The soft magnetic keeper layer may be establi |
| 5836533 |
Hybrid arm-position/tape-tension servocontrol system |
November 17, 1998 |
| Servomechanisms (58 and 60) control a takeup reel (12) and a tension arm (16) in a cassette recorder. The servomechanisms receive control signals (54 and 56) generated in accordance with respective control functions, each of which includes a respective constituent function of the differe |
| 5830590 |
Magnetic storage and reproducing system with a low permeability keeper and a self-biased magneto |
November 3, 1998 |
| A magnetic storage system includes a magnetic storage medium comprising a keeper layer of relatively low permeability soft magnetic material deposited upon a magnetic storage layer or between multiple magnetic storage layers. The low permeability keeper layer may be disposed either a |
| 5826326 |
Method for manufacturing a composite metal and ferrite head transducer |
October 27, 1998 |
| A magnetic transducer is batch fabricated from a pair of confronting elongate composite block substrates each formed of a thin cap of non-magnetic material bonded to a much larger block of magnetic material, such as ferrite. An intermediate winding groove is formed in proximate relat |
| 5774311 |
Small core magnetic head with non-magnetic side support |
June 30, 1998 |
| A head having very low leakage flux loss since the head is constructed with a very small elongate magnetic intercore, having a winding window formed therein if desired, with the intercore being supported on either side by non-magnetic side support blocks. The side support blocks enable m |
| 5757575 |
Track-curvature detection using clock phase shift in azimuth recording |
May 26, 1998 |
| A servomechanism for controlling the position of a magnetic-tape playback head (16) with respect to a track (24) of digital data on a magnetic tape (22) positions the head by reference to an error signal that error-signal-generation circuitry (FIG. 10). generates. Sample-clock signal |
| 5748192 |
Video special effects system with graphical operator interface |
May 5, 1998 |
| A video special effects system and method includes at least one signal system operating in real time to transform one or more input video signals to generate an output video in response thereto, a work station, an operator control panel and a control system communicating with the signal |
| 5742295 |
Video special effects system with graphical operator interface |
April 21, 1998 |
| A video special effects system and method includes at least one signal system operating in real time to transform one or more input video signals to generate an output video in response thereto, a work station, an operator control panel and a control system communicating with the signal |
| 5729413 |
Two-gap magnetic read/write head |
March 17, 1998 |
| An improved magnetic head obviates the need for separate read and write heads in a magnetic storage system by providing a head core having two physical gaps configured to generate a reproduce track width that is narrower than a record track width. The core of the head comprises a tap |
| 5729400 |
Data recorder using still framing techniques for information retrieval and method |
March 17, 1998 |
| An automatic scan tracking, helical tape type of data recorder is disclosed herein along with its method of operation. Data is written onto magnetic recording tape along with data retrieval information by means of a rotating scanner assembly forming part of the recorder as the recording |
| 5721475 |
Extended-resolution pulse-width modulation servomotor drive |
February 24, 1998 |
| Drivers (24, 26, and 28) in the controller for a motor (14) drive the motor in accordance with a pulse-width-modulation scheme in which each pulse-width-modulation cycle includes a positive interval and a negative interval so that the value of the filtered output is proportional to the |
| 5717552 |
Magnetic core with field confinement structure |
February 10, 1998 |
| An improved, shielded magnetic core structure is disclosed that is particularly well suited for use in magnetic read and write heads adapted for narrow track, short wavelength magnetic recording systems, and for transformers of high performance, wide band application. The improved ma |
| 5710673 |
Azimuth record head for minimizing and equalizing crosstalk between tracks of opposite azimuths |
January 20, 1998 |
| In an azimuth recording format, the crosstalk of the A channel into the B channel is higher than the crosstalk of the B channel into the A channel because, at the ends of a magnetic recording where the switching contour of constant magnetic field strength is equal to the media magnetizat |
| 5699211 |
Boxed leaf flexural pantographic mount for a magnetic transducing head assembly |
December 16, 1997 |
| A flexural pantographic mount for use in a helical scan magnetic tape transport, the mount being a boxed leaf stiffened flexural pantograph mount, for holding and varying the position of a moveable head in a helical scan automatic scan tracking magnetic tape transport. The mount incl |
| 5646798 |
Moveable capstan assembly for selectively contacting a media, which assembly includes a tachomet |
July 8, 1997 |
| A translatable capstan/tachometer assembly for use, for example, in transporting a magnetic media in a data record/reproduce apparatus, includes a capstan rotatably coupled to a tachometer unit. The assembly is supported for movement from an initial, unthreaded media position within a |
| 5615355 |
Method and apparatus for buffering a user application from the timing requirements of a DRAM |
March 25, 1997 |
| A method and apparatus for data storage and retrieval including first and second banks of refreshable memory, such as DRAMs. The user application provides a write clock and a read clock, the read clock being independent of the write clock. FIFO buffers are provided between the user appli |
