Sony Corporation

Tokyo Automatic Machinery Works, Ltd.

Yoshio Kishi

Masaru Nagami

Masato Noguchi

Yutaka Suzuki

Kenichi Amano

Teruhito Noshiro

Hiroyuki Fujikura

Hiroaki Takahashi

Toshiyuki Arai

Kenji Hori

Makoto Sakano

Teruaki Higashihara

Norichika Mine

Toshio Shigeta

Toshihide Kohata

Yukio Shirako

Masayuki Kondo

Yukihiro Maruyama

Hiromu Masaoka

A disk recording and reproducing apparatus which realizes a simultaneous recording function with a simple pickup system. The apparatus comprises a recording and reproducing head, a first memory for receiving and storing input signals at a first rate and supplying the stored signals at a second rate higher than the first rate so as to be recorded onto a disk medium at the second rate by the head, a second memory for receiving and storing signals reproduced at the second rate by the head and outputting the stored signals at a rate lower than the second rate, and control means for controlling the head to reproduce the Nth block (N is a natural number) and then repeating, while N is repetitively incremented, a sequence of operations of reproducing the N+1th block, moving to a position of the disk medium at which the Nth block is recorded, recording the input signals supplied thereto from the first memory means at the position of the disk medium at which the Nth block is recorded, and moving to another position of the disk medium at which the N+2th block is recorded.

Apparatus for and method of synchronously recording signals onto a disk

A command from a remote terminal of an editor is supplied to a system controller in an information reproducer. The system controller controls a control circuit and a reproducing circuit, and sets address information in an address output circuit. During virtual reproduction, the system controller sets virtual address information in the address output circuit, and the virtual address information signal is output to an address input terminal of the editor. A reproduced information signal from the reproducing circuit is supplied to an information input terminal of the editor via an information output circuit.

Information signal edit method and apparatus

A disk accommodating housing and a recording apparatus which can protect written data in a divisional data area of a recording medium with certainty where the data should not be erased inadvertently or in error are disclosed. A recording medium having first and second areas is accommodated in the housing which has an indicator for indicating one of first, second and third modes. The recording apparatus detects the mode indicated by the indicator and operates in accordance with the mode. In the first mode, writing or erasing operations into or from the first and second areas of the recording medium by a recording head are enabled; in the second mode, a writing operation into the first area is enabled while a writing operation into the second area is inhibited; and in the third mode, writing operations into both of the first and second areas are inhibited.

Recording apparatus having a function to prevent recording of a signal

A disk recording and reproducing apparatus which realizes a simultaneous monitoring function with a recording function with a simple pickup system is disclosed. The apparatus comprises a recording and reproducing head, a first memory for receiving and storing input signals at a first rate and supplying the stored signals at a second rate higher than the first rate so as to be recorded onto the disk medium at the second rate by means of the recording and reproducing head, a second memory for receiving and storing signals reproduced at the second rate by means of the recording and reproducing head and outputting the stored signals at a rate lower than the second rate, and a controller for controlling the recording and reproducing head to relatively scan a same portion of the disk medium twice for a predetermined period of time so that recording and reproduction occur alternately and successively at the portion of the disk medium for each predetermined number of blocks.

Optical disk mastering apparatus having two data transferring rates for

A method of editing a plurality of information signals recorded on a recording medium is provided. According to this method, information signals which are required for editing and which are included among the signals already recorded on the recording medium are indicated. Then such indicated signals are reproduced and recorded on the same recording medium in sequence and a recording control device is caused to recognize the area on the recording medium where the indicated signals are not newly recorded, as an empty area free of recorded signals, to thereby make the best use of the recording area of the recording medium.

Method of editing information signals recorded on recording medium

A method an apparatus for replacing reels of web-like material having a paper-end gripping arm having an attraction surface and a keep pawl. A peeling member peels of a bonded end portion of the material and the material is delivered along a transport path where it is held and the bonded end portion is cut off. The cut end portion is then removed from the transport path. Two reels are supported on reel holding portions and are alternately fed to the transport path. The end portion is bonded to the reel by boring a hole in the end portion, attaching tape to the outer surface in the area of the hole and pressing the tape inwardly so that it extends through the hole and is bonded to the outer surface of the material beneath the hole.

Method and apparatus for replacing web-like material in a web-like

An optical disc assembly includes an optical disc on which signals are recorded, and from which the signals are optically reproduced; a closed casing rotatably containing the optical disc, and having a transparent portion; and a rotor fixed at the center of the optical disc and magnetically coupleable with an external rotating magnetic field to be rotated therewith. An optical disc assembly includes a rotating magnetic field generating device arranged outside of the closed casing and concentrically with the optical disc to drive the latter without contact.

Optical disc and disc drive mechanism

Apparatus is provided for controlling a web transport system, such as a tape transport, of the type having supply and take-up reels for supplying and taking up the web, respectively, a tension control circuit for controlling the supply and take-up tension of the web, a web drive, such as a capstan, and a sensor for sensing the movement of the web as it is driven. The control apparatus includes a web drive detector for detecting the operation of the web drive and, particularly, the speed at which the web drive is driven. A comparator coupled to the sensor and the web drive detector compares the actual speed at which the web moves and the speed at which the web drive is driven to indicate when the speed at which the web moves differs from the speed at which the web drive is driven, such as when the web slips with respect to the web drive. An adjusting circuit coupled to the comparator adjusts the tension control circuit when the web speed differs from the web drive speed.

Apparatus for controlling a web transport system

A stator yoke for a DC brushless motor is comprised of a layer of insulating material of a predetermined thickness and a layer of magnetically permeable material which are bonded to each other by adhesive or the like. The magnetically permeable layer can be composed of several steel plates, preferably of silicon steel, bonded to each other. The insulating layer in one embodiment is composed of a cloth-like material, for example, of glass fibers, and a cured adhesive filling the interstices of the cloth-like material and bonding the insulating layer to the magnetically permeable layer.

Stator yoke for electrical apparatus

A flat drive motor, operative to transmit torque from a rotor to a drive shaft uses the attraction of a rotor magnet for a magnetic material to apply a fixed normal force to an integral friction clutch. When overloaded, the friction clutch slips with a controlled friction proportional to the normal force to prevent the development of excessive torque and to permit the rotor to turn at a normal speed while the drive shaft is slowed or stopped to prevent excessive current in the motor drive coils.

Motor with integral clutch

A brushless DC motor includes a permanent field magnet secured to a rotor and having a radially directed annular surface, and two phase coil elements in the form of a sectorial loop secured to a stationary stator and disposed in a plane parallel to the annular magnet surface, the loop having circumferentially extending portions which are in inner and outer relation in respect to the center of the annular magnet surface, with the magnet and each coil element being relatively rotatable about the axis of the rotor. The mean radial distance f between the inner and outer circumferentially extending portions of each coil element and the radial width b of the annular surface of the magnet are selected as that the ratio b/f is within the range of 0.8 to 1.2 for maximizing the viscosity factor .mu. of the motor. In addition to providing the above ratio within the stated range or as an alternative thereto, the mechanical viscosity factor .mu. can be maximized by providing a reduced air gap d'=.sqroot.2d/.sqroot.ab, in which a is the mean radius of the magnet, d is the size of the air gap between the annular magnet surface and the stator, and d' has a value within the range of 0.15 to 0.30.

DC Motor

A mode change-over mechanism for a tape recording and/or reproducing apparatus wherein the operating mode is selected by depressing a selected one of a plurality of push-buttons. The mechanism includes a pair of operating gears and a pair of independently movable operating members. The operating gears are associated with selected ones of plural push-buttons through respective trigger members. Movement of the first operating member in response to depression of a push-button establishes one operating mode for the recorder/reproducer; movement of the second operating member in response to another push-button establishes a second mode; movement of both operating members responsive to a third push-button establishes another mode; and further modes are obtained by movement of the first operating member through plural paths.

Tape recording and/or reproducing apparatus

In a tape recording and/or reproducing apparatus for use with a tape cassette including a housing containing a supply of tape and having spaced parallel walls with an opening therebetween at one side of the housing along which a run of the tape is normally guided, and lids mounted on the housing for movement relative to the latter in directions parallel to the planes of the spaced walls between closed positions where the lids extend along the opening for covering respective parts of the tape run and opened positions where the lids are displaced from the opening to permit the withdrawal of the tape therethrough; and in which magnetic heads or transducers for recording and/or reproducing information signals on a tape engaged therewith are mounted on a chassis so as to be spaced from the open side of a cassette housing when the latter is positioned by engagement with locating members on the chassis, and tape withdrawing members are engageable with the tape run in the cassette housing positioned by the locating members and are operative to withdraw the tape through the open side and into engagement with the transducers: a cassette loading device is provided which includes a cassette holder pivotally mounted for movement in respect to the chassis between an inoperative position spaced from the locating members for permitting the insertion and removal of a cassette in the holder and an operative position where a cassette in the holder is engaged with the locating members, lid opening members mounted for movement in respect to the holder between an inactive position at which the lid opening members are spaced from a cassette in the holder in a direction substantially perpendicular to the planes of the walls of the cassette housing so as to avoid interference with the insertion and removal of the cassette in the holder, and an active position at which the lid opening members are engageable with the lids of a cassette in the holder and are displaced relative to the holder in the direction of movement of the respective lids from their closed positions to their opened positions, and a cam arrangement connecting the lid opening members with the holder and chassis for disposing the lid opening members in their inactive and active positions when the holder is in its inoperative and operative positions, respectively. Preferably, the cam arrangement is operative to move the lid opening members relative to the chassis in opposition to the initial pivotal movement of the holder from its inoperative position so that the engagement of the lid opening members with the lids and the substantial opening of the latter can be achieved well before the arrival of the holder at its operative position.

Cassette tape recording and/or reproducing apparatus

A first main information signal is recorded in a first track extending longitudinally along one side of a length of magnetic tape and a corresponding first secondary, or control, signal is recorded in a narrow parallel track spaced from the first main track. A second main signal is recorded in a third track within the other half of the tape, and a corresponding second secondary, or control, signal is recorded between the first secondary signal and the first main signal, whereby the two main signals and the two secondary signals are interleaved with each other. The first and second main tracks are equal in width, and the first and second secondary tracks are also equal in width but are much narrower than the first and second main tracks. If desired, the first and second main tracks can each be divided into first and second sub-main tracks to permit two channel recording with a control track in each direction but with each control, or secondary, track being separated from its own nearest subtrack by a distance equal to the width of the other secondary track plus two guardbands, one on each side of the other secondary track.

Method for recording information signal and control signal

A mode selecting device for a tape recording and/or reproducing apparatus includes a plurality of push-button members which are selectively actuable from rest positions to active positions for selecting corresponding operating modes of the apparatus, electrically energizable driving means, such as, solenoids, which are energized in response to the actuation of a selected one of the push-button members to an active position, operating members selectably movable by said driving means from inoperative positions to operative positions in response to the energizing of selected solenoids and being urged to an inoperative position upon deenergizing of such solenoids, a plurality of transmission members coupled with the operating members which are moved in response to the actuation of a respective one of the push-button members for establishing the corresponding operating mode of the apparatus by the movement of the operating member to its operative position, and a release operative, for example, by actuation of a stop push-button member, to release the operating member to return it to its inoperative position for halting a previously selected operating mode.

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Tokyo, Japan

Yoshio Kishi