Between Plural Stationary Heads Patents (Class 360/63)
  • Patent number: 4633337
    Abstract: A floppy disk driving circuit comprises a memory circuit for storing a plurality of items of delay time of a pair of erase heads from the switching-ON and the switching-OFF of a read/write head for all the tracks of a floppy disk, a control circuit responsive to the memory circuit for controlling ON- and OFF-delay timing of the pair of erase heads based on the plurality of items of delay timing. The plurality of items of suitable timing are previously calculated in connection with the respective tracks of the disk and stored within the memory circuit.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: December 30, 1986
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Nobuyuki Horie, Yoshiki Nishioka, Noriaki Sakamoro, Toshiaki Fujikawa, Toshihiro Yamanaka
  • Patent number: 4616272
    Abstract: A digital signal reproducing apparatus comprises a reproducing head for reproducing from a magnetic tape digital signals which are magnetically recorded on n tracks of the magnetic tape, where n is a natural number greater than one, the magnetic tape has a guard band separating each of two adjacent tracks among the n tracks, the reproducing head comprises n reproducing element groups provided in correspondence with the n tracks and each of the n reproducing element groups comprises a plurality of reproducing elements arranged in the tape width direction over a range of a corresponding track and guard bands on both sides thereof, a selecting circuit for selectively obtaining outputs of those reproducing elements opposing a uniform part of the magnetic field intensity distribution of the corresponding track among outputs of the plurality of reproducing elements in each of the n reproducing element groups, which selecting circuit is provided for each of the n reproducing element groups, and an adder for adding o
    Type: Grant
    Filed: March 12, 1985
    Date of Patent: October 7, 1986
    Assignee: Victor Company of Japan, Ltd.
    Inventor: Masaru Moriyama
  • Patent number: 4562491
    Abstract: A multichannel digital magnetic recording apparatus comprises a plurality (N) of modulating circuits (41 to 4N) and timing circuits (51 to 5N). Digital signals (Z1 to ZN) undergo modulation in the modulating circuits in accordance with a modulation system of a detection window Tw. The modulated signals (A1 to AN) are converted into pulse current trains by the timing circuits and then delayed such that the respective pulse currents do not occur simultaneously. Accordingly, a power capacity required of a voltage source for writing the signals by means of thin film magnetic heads (71 to 7N) is considerably decreased.
    Type: Grant
    Filed: March 15, 1983
    Date of Patent: December 31, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaru Kawabata, Teruo Furukawa, Michiyasu Ishibashi
  • Patent number: 4558380
    Abstract: A magnetic tape transport for recording digital data. The tape transport is selectively operable in either a parallel write mode for recording concurrently along multiple tracks in a standard format or a high density serial write mode for recording along one track at a time, the multiple tracks being recorded in sequence in a serpentine format. The transport uses standard multitrack read and write heads with each head having N transducers, where N is a positive integer greater than 1, supplemented by an additional multitrack read head or write head with N/2 transducers for N even or (N-1)/2 transducers for N odd, so that for either direction of tape movement, the tape will first pass a write head and then a read head. When moving in a first direction (forward) the tape will move past the write head and then past the first read head.
    Type: Grant
    Filed: May 11, 1983
    Date of Patent: December 10, 1985
    Assignee: Pertec Peripherals Corporation
    Inventor: Carl D. Porter
  • Patent number: 4543618
    Abstract: A tape recorder capable of performing simultaneous recording or reproducing operation and dubbing operation easy is disclosed. The tape recorder comprises a dubbing means for simultaneously operating a reproducing operation means for one tape drive mechanism and a recording and reproducing operation means for the other drive mechanism or an operation interlock means for simultaneously operating a pair of pause operating means.
    Type: Grant
    Filed: September 22, 1982
    Date of Patent: September 24, 1985
    Assignee: Olympus Optical Company Limited
    Inventor: Masaaki Sato
  • Patent number: 4525755
    Abstract: A record and playback apparatus for use with magnetic tape cassettes and the like can be switched between the normal two track cassette format for either record or playback or single track format for either record or playback. The apparatus provides optimum record and bias signals to the record head gaps being used regardless of whether two record head gaps are used for standard format or a single record head gap is used for single track format. The apparatus also preferably includes motor speed switching and regulating circuitry so that the apparatus can be satisfactorily operated at normal cassette speed or at a reduced speed, preferably one quarter that of normal speed. Switching of play and record equalization as well as record bias is also preferably included with the speed switching.
    Type: Grant
    Filed: July 19, 1979
    Date of Patent: June 25, 1985
    Assignee: Norwood Industries, Inc.
    Inventor: Thomas Meek
  • Patent number: 4504873
    Abstract: A multiple transducer disk file format and head addressing/switching control circuitry is shown and described which permits reading all sector identifier (ID) fields during a single rotation of the media using uniformly staggered sectors. This results in an average access latency of one-half revolution of the media and enables the use of maximum or selectively reduced data rates secured by successively storing data in sectors separated by sector fractions which are multiples of the uniform staggering between sectors within a cylinder.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: March 12, 1985
    Assignee: International Business Machines Corporation
    Inventors: Peter B. Bandy, John A. Danen, Nyles N. Heise, Donald C. Holtan
  • Patent number: 4472753
    Abstract: The length of tape that can be wound into a videotape cassette such as Betamax or VHS can be increased by modifying the casette to employ the braking mechanism of the invention. This involves a flanged reel in which teeth are formed only in the outer face of one flange, and a brake lever which has a finger formed with a tooth-engaging ramp that is inclined at to the inner face of said flange when the finger fits between adjacent teeth.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: September 18, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: James J. Wulfing
  • Patent number: 4466026
    Abstract: A record/reproduce circuit for VTR comprising two normal reproducing heads with different azimuth angles, a special reproducing head with the same azimuth angle as that of the one normal reproducing head, a rotary transformer through which signals from these heads are supplied to a static circuit section, a change-over means for alternately switching a signal from the special reproducing head and a signal from the other normal reproducing head with a different azimuth angle from that of the special reproducing head, a feedback type preamplifier for amplifying the output of the change-over means, and another feedback-type preamplifier for amplifying a signal from the normal reproducing head with the same azimuth angle as that of the special reproducing head.
    Type: Grant
    Filed: February 17, 1982
    Date of Patent: August 14, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Kuniaki Miura, Akira Shibata, Noboru Kojima, Keiichi Komatsu, Teizo Tamura, Makoto Konosu, Yasuji Moriyama
  • Patent number: 4428008
    Abstract: An electronic switching circuit coupled between a magnetic head driving circuit and transducing windings utilizing an electronic switch whose internal resistance changes substantially linearly in response to an increasing or decreasing control signal. Particularly useful in magnetic bias recording or erase circuits to eliminate erase of useful information and recording of disturbing noise spikes due to induced high frequency noise signal when the switch is activated.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: January 24, 1984
    Assignee: Ampex Corporation
    Inventor: John S. Fawkes
  • Patent number: 4420777
    Abstract: A tape recorder with a cue signal recording function is arranged to record input signals on corresponding recording tracks of at least two channels, at least one of which is also utilized as a track for cue signal recording. When the cue signal is not being recorded, the cue signal recording track is utilized for recording a given input signal other than the cue signal, in cooperation with recording of other input signals on recording tracks other than the cue signal recording track. During recording of the cue signal on the cue signal recording track, the given input signal is recorded on one of the other recording tracks.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: December 13, 1983
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Kenji Furuta
  • Patent number: 4369473
    Abstract: In a recording and/or reproducing apparatus comprising at least one magnetic head (29, 30), which is rotatable in a given direction of rotation (31), and at least one tape guide (16) for a magnetic tape (3), which guide is arranged near said head, said tape passes round at least a part of the circumferential surface of the tape guide and past the magnetic head, which rotates at a given level oblique tracks being scanned by means of said magnetic head in a given direction of movement (36) of the magnetic tape, which tracks are each time situated within a longitudinal half of the magnetic tape.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: January 18, 1983
    Assignee: U.S. Philips Corporation
    Inventor: Walter Eibensteiner
  • Patent number: 4356520
    Abstract: Multichannel magnetic heads are connected to record and reproduction signal lines through electronic switching elements. The electronic switching elements are successively switched by the switching control signals to be successively connected to said magnetic heads.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: October 26, 1982
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Tuneo Yanagida
  • Patent number: 4323934
    Abstract: Apparatus for compensating for the absence of signals among a plurality of correlated signals, which occur simultaneously and which have carrier components, is disclosed herein. Such apparatus comprises detector means responsive to the absence of the carrier for longer than a predetermined time for selectively connecting output signals from channels where the carriers are present to the outputs of those channels where carriers are absent. The apparatus of the invention operates in real time without delay devices. Preferably, the invention is embodied in an apparatus for reproducing magnetically recorded, stereophonic signals, functioning to prevent dropouts from affecting the quality of the output signals and the sound corresponding thereto.
    Type: Grant
    Filed: March 27, 1980
    Date of Patent: April 6, 1982
    Assignee: Spin Physics, Inc.
    Inventor: Andre Giraud
  • Patent number: 4309729
    Abstract: A magnetic tape reproducing and/or recording system in which two magnetic cassette tape transports are mounted on the same chassis and are adapted to selectively drive magnetic tape from two separate type cassettes past separate head assemblies to reproduce and/or record magnetic signals on the tape. The arrangement is such that the second tape cassette is automatically actuated upon the tape in the first cassette reaching its end, and vice versa. Logic circuitry is provided which controls the tape transports so that, after completion of the first cassette tape it can be rewound to a starting position during play of the second tape, and vice versa. A single set of recording and playback electronics can be provided which are automatically switchable between the respective head assemblies depending on the particular operational mode.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: January 5, 1982
    Inventor: Warren B. Kice
  • Patent number: 4303956
    Abstract: Disclosed herein is a load-sharing type magnetic head, comprising a plurality of mutually independent arrayed magnetic head cores and a plurality of drive lines formed of coils each wound successively on the magnetic head cores in such a manner that the sequence of winding directions of the plurality of coils on each magnetic head core is different from that on all other magnetic head cores in the whole system, whereby the sum of the magnetomotive forces produced by the plurality of coils in the magnetic head cores is amply increased in the selected head core and amply decreased in the remaining cores by properly controlling the direction and/or magnitude of the electric current passed through the drive lines.
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: December 1, 1981
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade and Industry
    Inventors: Akio Kobubu, Toshio Tanaka
  • Patent number: 4298897
    Abstract: A forward/backward compatible apparatus and record member achieves multiple density by multiple track widths as well as multiple lineal densities. In a rotating head recorder a single head has a wide write gap followed by a plurality of narrow read gaps. In recording, narrower tracks--i.e., higher densities, the record medium is moved less than the width of the write gap for recording narrower tracks. The narrower tracks have the same width as the trailing read gaps. During readback, all read gaps are simultaneously operative. Signals from one of the read gaps are processed immediately, while signals from the remaining read gaps are buffered until a dead time occurs, such signals are then processed. The same principles are applicable to magnetic card and magnetic disk recorders. A record member of the disclosure employs a table of contents area always recorded at the lower density--i.e., widest track.
    Type: Grant
    Filed: September 20, 1979
    Date of Patent: November 3, 1981
    Assignee: International Business Machines Corporation
    Inventors: Nelson K. Arter, Ernest W. Devore, Arthur B. Wills, Leslie R. Zelenka
  • Patent number: 4270154
    Abstract: Method for recording and reading data in a disc storage unit is disclosed. The method includes providing a plurality of stacks of read/write heads mounted about the periphery of the disc pack. An additional feature includes the capability for prepositioning at least one of the stacks while another stack is performing a read or write operation. Also provided is means for simultaneously performing a separate read or write operation with each of at least two of the stacks. By the present invention, disc access time is minimized through a time based selection of an optimally located head.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: May 26, 1981
    Inventor: John E. Crawford
  • Patent number: 4270150
    Abstract: Apparatus is disclosed for recording video information signals on magnetic media by sampling the information signal and converting the samples to a plurality of component digital data streams which are simultaneously recorded on separate surfaces of a disc pack associated with a generally standard computer disc drive and for thereafter reproducing the plurality of digital data streams and recombining the same in a manner whereby the analog video information signal is reconstructed.
    Type: Grant
    Filed: January 28, 1977
    Date of Patent: May 26, 1981
    Assignee: Ampex Corporation
    Inventors: Joachim P. Diermann, Thomas W. Ritchey, Jr.
  • Patent number: 4222081
    Abstract: The difference between the two gain control signals for two amplifiers which correspond to two of a plurality of read heads which have the maximum and minimum output levels is detected. Whether or not the difference exceeds a predetermined value indicates an abnormality of the outputs of the read heads due to dust adhering thereto.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: September 9, 1980
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihisa Kamo, Zenji Tsutsumi, Hiroshi Maejima
  • Patent number: 4198662
    Abstract: In order to record and play back video signals on magnetic tape, the magnetic tape is fed past a magnetic head and reversed periodically. A stationary multi-track magnetic head is used, and a magnetic tape moves relatively thereto. The head gaps of the multi-track head are successively allocated to the lines of a half-picture in accordance with circuit technology during forward travel. In this case, the half-picture is recorded by gap-wise scanning in the form of very narrow short non-overlapping stepwise parallel tracks and is reproduced during playback. During backwards travel of the magnetic tape, the head gaps are then allocated to the lines of the half-picture in the reverse sequence so that the track sequence is shifted by at least one gap during each reversal. The gaps missing at the end of the track sequence are made up cyclically by the corresponding number of gaps at the other end of the row of head gaps.
    Type: Grant
    Filed: December 19, 1977
    Date of Patent: April 15, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventor: Heinrich-Christian Schopper
  • Patent number: 4180838
    Abstract: A prerecorded magnetic tape format having program breakpoint alignment is used in the present invention to provide continuous long duration, highly non-repetitive, program selectable selections of music as for use in background music systems. Cueing means are provided at the end of each set of recorded musical selections of a multi-channel playback system. The cueing signal is used to trigger a programmable channel selection means for controlling which channel of the multi-channel system is selected for reproducing the next recorded musical selection. This program breakpoint switching process is repeated for any desired playing interval.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: December 25, 1979
    Inventor: William Fehrenkamp
  • Patent number: 4176362
    Abstract: A head for magnetizing a broad magnetic tape or the like to form magnetic images representing lines of high quality characters or other images, including a large number of closely-spaced recorder elements, such as two thousand spaced a few thousandths inches apart, the elements having parallel strip portions with recording locations therealong. The elements are arranged in groups, with the elements in one group having a common enlarged interconnected region on one side of the recording locations and with each element in the group having a separate enlarged terminal on the other side of the line of recording locations. The terminals are arranged in a staggered fashion, so that the elements located progressively closer to one end of the group have terminals located progressively further from the line of recording locations.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: November 27, 1979
    Assignee: AM International, Inc.
    Inventor: Alfred M. Nelson
  • Patent number: 4138697
    Abstract: A data recording system includes a master tape recorder interconnected to a plurality of slave recorders. Each recorder is adapted to record meter data provided thereto from a meter associated with each recorder. The master recorder includes a timing circuit for effecting the recording of interval marks at periodic intervals on tape of all of the recorders as a time reference for the meter data of each recorder. The timing circuit also includes means for detecting a power outage to the recorders to generate a power outage pulse which effects the writing of a power outage indication by all of the recorders.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: February 6, 1979
    Assignee: General Electric Company
    Inventors: Joseph G. Russillo, William C. Earl
  • Patent number: 4122306
    Abstract: A telephone answering system which can be interconnected to a telephone line and includes two tapes, one of which is utilized for recording incoming messages from the telephone line, and the other of which is used basically for playing outgoing messages onto the telephone line. The outgoing message tape includes a plurality of tracks each of which can be selectively placed in communication with the telephone line. A decoding apparatus is responsive to numerals dialed onto the telephone line by the caller with which the caller can select the particular track to be placed in communication with the telephone line and thereby receive the particular outgoing message contained on that track. By dialing an additional number, the caller can also change over the operation of the outgoing message tape to a record mode whereby he can utilize that tape for also receiving incoming messages from the telephone line and cause the message to be placed on a particular selected track.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: October 24, 1978
    Inventors: Jacob Friedman, Sandor Goldner, Jacob Lax
  • Patent number: 4121262
    Abstract: A magnetic recording/reproducing device in the form of a double cassette tape deck is described. A magnetic recording/reproducing device comprises a first tape transporting portion for a first cassette tape, a second tape transporting portion for a second cassette tape arranged in parallel with the first tape transporting portion, a recording/reproducing head in relation to the first tape transporting portion, a reproducing head in relation to the second tape transporting portion, a single recording system, a single reproducing system, a means for switching the recording/reproducing head from the reproducing system to the recording system in response to the operation of an REC button on the first tape transporting portion, and a means for switching the reproducing system from the recording/reproducing head to the reproducing head in response to the operation of a PLAY button on the second tape transporting portion.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: October 17, 1978
    Assignee: Clarion Co., Ltd.
    Inventors: Yoji Ushio, Chiaki Taketomi, Tutomu Asaga
  • Patent number: 4095261
    Abstract: This disclosure pertains to a public address apparatus comprising a portable dual track tape recorder -- playback unit having individual stationary electromagnetic dual purpose recording and playback heads feeding selectively independently the input of a single channel audio amplifier and speaker system. The audio amplifier is provided with two additional output terminals, each of which is independently capable of providing recording currents to each recording head as desired. Additional inputs are provided accommodating microphones and radio receivers.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: June 13, 1978
    Inventor: Jesus Rodriguez
  • Patent number: 4086635
    Abstract: A tape recorder comprises a plurality of recording and reproducing heads each arranged for a corresponding one of a plurality of recording tracks, means for setting different recording speeds specified for the respective recording tracks, and means for setting a reproducing speed at the speed specified for a corresponding one of the recording tracks in response to a reproduction signal produced from the recording and reproducing head.
    Type: Grant
    Filed: December 30, 1975
    Date of Patent: April 25, 1978
    Assignee: Olympus Optical Co., Ltd.
    Inventor: Sinichi Saitou
  • Patent number: 4063293
    Abstract: A magnetic head switching matrix selectively couples a plurality of balanced read-write heads to the output of a write amplifier and to the input of a read amplifier. Constant current supplies apply equal constant currents to a pair of write data lines connected to the write amplifier output and two further constant current supplies apply equal constant currents to two read data lines connected to the read amplifier input. The two coils of each head are coupled to the write data lines through two matched diodes respectively and are similarly coupled to the read data lines through another pair of matched diodes respectively. The center tap of each head is coupled to write and read reference voltage sources through respective diodes as well as being coupled to a read-write control voltage source.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: December 13, 1977
    Assignee: Sperry Rand Corporation
    Inventor: Avraham Perahia
  • Patent number: 4044387
    Abstract: A switching system for use with magnetic heads and providing protection for the read or write circuits while the other is being used and further substantially reducing any losses or distortion in the read signal when the circuit is switched to the read mode.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: August 23, 1977
    Assignee: Sperry Rand Corporation
    Inventors: Lee A. Watkins, Larry M. Jacob
  • Patent number: 4038691
    Abstract: Means providing stationary images have associated therewith sound related to each of the images. A plural number of non-translatable magnetic heads are used in conjunction with a control circuit so as to extend the recording time by enabling the recording or reproducing of independent sound tracks, one sound track per head, and switching such heads in sequence at end of each record or reproduce period. The control circuit may be electronic or electromechanical.
    Type: Grant
    Filed: March 26, 1976
    Date of Patent: July 26, 1977
    Inventor: Martin E. Gerry
  • Patent number: 4037258
    Abstract: A read/write apparatus for magnetic recorders including a decoder for converting input digital control and data signals into a plurality of select signals, a voltage source switchably connected to the read/write heads of the apparatus such that individual select lines are enabled for determining which recording head is actuated for writing on a chosen magnetic medium, what orientation of magnetic flux will be written, and what magnitude of flux will be written. Also, the select lines operate, when the voltage source is disabled, to condition the heads to allow read-out of data recorded on the magnetic media, and to select which head is to perform this read-out. Also included in the recorder is a signal redigitizer to digitize data read from the magnetic media, and erase means for reducing edge and transient effects on the magnetic media.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: July 19, 1977
    Assignee: Xerox Corporation
    Inventor: Srinivasan V. Chari
  • Patent number: 4030128
    Abstract: There is disclosed a method of scrambling a video information recording of a type having video information and a video information playback control signal recorded on a recording medium, with the playback control signal being normally in that type of recording recorded in a first track positioned on the recording medium for playback by a specifically positioned playback device in a standard video information playback apparatus. According to the disclosed scrambling method, the video information is recorded on the recording medium, and the video information playback control signal is recorded on the recording medium in a second track different from the mentioned first track.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: June 14, 1977
    Assignee: Bell & Howell Company
    Inventor: Ludwig A. Perret
  • Patent number: 4016547
    Abstract: Loss of a magnetic track on a rotating drum memory is compensated for by a erially connected shift register. Since replacement of an entire magnetic drum is a costly venture, it usually is not warranted when only one or two or several tracks have become corroded or otherwise scored. The shift register is provided with an appropriate amount of stages to handle the data otherwise stored on a damaged magnetic drum track. Provision is made in the inventive concept herein disclosed for providing index and clock signals in event of the failure of the index and clocking tracks in the memory drum.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: April 5, 1977
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Robert E. Page
  • Patent number: 4015290
    Abstract: A battery powered load survey recorder for measuring electrical loads and providing a magnetic tape record of data with time reference signals in a format which is compatible for use with available data processing apparatus includes a data recorder circuit serving as a signal source for a data head of the recoder for recording the data, and a time recorder circuit serving as a signal source for a time head of the recorder for recording the time signals, current flow over the two recording heads being effected in a series arrangement to provide NRZ1 recording with reduced current drain, and the direction of current flow in each head being controlled only by it associated signal source.
    Type: Grant
    Filed: July 31, 1975
    Date of Patent: March 29, 1977
    Assignee: Sangamo Electric Company
    Inventor: Jack R. Bowers
  • Patent number: 4012784
    Abstract: A voice actuated voice logging recorder includes logging decks and a recall deck such that voice data may be recorded or played back in the recall deck without interruption of the recording of voice data onto the tape of the logging deck. The invention further includes networks for recording a time code modulated by a unique signal indicative of the beginning of each message of voice data and for automatically repositioning the tape of the recall deck in response to the detection of the unique signal.
    Type: Grant
    Filed: November 28, 1975
    Date of Patent: March 15, 1977
    Assignee: Minnesota Mining & Manufacturing Company
    Inventors: Robert L. Murphy, Dan J. Argento
  • Patent number: 4005483
    Abstract: An automatic record control apparatus is disclosed in which multichannel tracks of a rotary magnetic recording medium are endlessly traced one track-by-one track in response to pulses associated with vertical synchronizing pulses of a video signal. With the closing of a recording switch, the video signal is recorded in the tracks being traced, and the number of the recording tracks to be recorded are limited to a predetermined number from the instant of detection of a signal associated with a motion of an object to be recorded by counting the number of the signal, the recording operation being automatically stopped after coverage of predetermined number of tracks.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: January 25, 1977
    Assignee: Hitachi, Ltd.
    Inventor: Takeshi Kuwano
  • Patent number: 4003089
    Abstract: A two-four channel tape player having a single eight-track tape head or a pair of fixed position tape heads, each head having four pickups, and each pickup aligned with a track on the tape. The pickups connect to voltage controlled amplifiers which are controlled by logic circuitry. The logic circuitry is programmed to select either two channel or four channel program material and is further programmed to sequence to other tape programs in response to a sequence command. Further signal processing is accomplished in output matrixing circuitry which is also logic circuitry controlled.
    Type: Grant
    Filed: December 31, 1974
    Date of Patent: January 11, 1977
    Assignee: Motorola, Inc.
    Inventor: Louis Clifford Maurer
  • Patent number: 4000518
    Abstract: A signal detection arrangement is disclosed for detecting signals during variable speed tape movements such as during tape rewinding or fast forward speeds. To elaborate, information encoded as multifrequency information tones is grouped in exercises on a recording tape, and at least two low frequency tones are provided at the beginning of each exercise. Each of these low frequency tones has a frequency which is related to the frequency of a different one of the information tones by a multiple of the ratio of the rewind speed to the normal forward speed times a predetermined factor. Accordingly, during normal playback these low frequency tones will not be detected. However, during fast forward or rewind, each of these tones will be multiplied up to a detectable frequency. Moreover, even over wide variations in these "fast" speeds, at least one of these low frequency tones will be detected.
    Type: Grant
    Filed: May 12, 1975
    Date of Patent: December 28, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventor: Ralph Stearns
  • Patent number: 3987485
    Abstract: A flux sensitive magnetic head is disclosed which comprises conductive electrodes formed contiguous to the principal surface of a semiconductor substrate at a predetermined spacing, the electrodes being formed by evaporating or diffusing a conductive material on or into the substrate, and a flux sensitive element bridging the electrodes. This head may have a small size and is suited for constructing multi-track heads.
    Type: Grant
    Filed: February 13, 1974
    Date of Patent: October 19, 1976
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Sugaya, Takeshi Ishihara, Fukashi Kobayashi, Kenji Kanai
  • Patent number: RE29922
    Abstract: .Iadd.A multiple track magnetic tape track selector stereo recorder having a head assembly including multiple recording heads and multiple associated erase heads disposed on different levels of the multiple track tape, and having a PLAY SELECTOR control for track selection including selective switching for selectively activating and deactivating the heads connected with recording and erasing circuitry, whereby the PLAY SELECTOR control selectively activates and deactivates one recording head and one respectively associated erase head simultaneously on any one selected track from the operating stereo tracks on the tape to record and erase and rerecord signals thereby particularly controlling track selection of the multiple associated erase heads..Iaddend. NOTE.- Formerly scheduled for issue and publication on Jul. 12, 1977.
    Type: Grant
    Filed: January 25, 1972
    Date of Patent: February 27, 1979
    Inventor: Sidney O. Sampson