Abstract: A magnetic disk drive has a drive motor mounted on a yoke which rotatable about a pivot in the drive. A bezel member mounted on the end of the yoke normally closes the opening the disk drive through which a cartridge is inserted. As this bezel member is moved out of the cartridge, the motor is moved out of the position in which it engages the disk and when the bezel member is closed, the motor moves into the engagement position. The motor is mounted on the yoke with a movable connection so that it is guided in a linear movement into engagement with the motor.
April 22, 1981
Date of Patent:
February 26, 1985
Randall C. Bauck, S. Peter Kleczkowski, Anton J. Radman
Abstract: A carrying-arm arrangement for a magnetic disc store includes a movable carrying arm connected to at least one magnetic head. The magnetic head is shielded from spurious magnetic fields by a mu-metal shield which is connected to the arm and extends over the head.
Abstract: A magnetic head for acoustic instruments. The head is composed of at least two units. Each unit, in turn, is composed of a shielding case half, a core holder, cores, etc. The core holder and/or the cores are easily positioned in the shielding case half at the time of assembly of the unit. The units are joined to each other to form a complete magnetic head.
Abstract: A cassette loading assembly for VTR use is disclosed, wherein a cassette is inserted in the depth of a cassette chamber through an inlet port in the front of a VTR body carrying operation buttons, etc. and moved into operating position in a desired direction, for example, downwardly together with a cassette carrier for recording and reproducing TV pictures. The cassette loading assembly includes means for actuating a cassette carrier on which a cassette is mounted, means for supplying driving force for moving the cassette carrier, means for controlling the movement of the cassette carrier, and means for operating an operating item in association with the movement of the cassette carrier.
Abstract: A clutch system in a tape player comprises a first rotor rotated by a motor and a second rotor capable of engaging with and disengaging from said first rotor, both rotors being formed with engage portions at their end faces which are adjacent to each other. The clutch system is further provided with a switching means for carrying out engagement and disengagement of said rotors, and the switching means is operated by an operating means for making said motor carry out automatic loading operation.
Abstract: A magnetic head positioning mechanism positions a magnetic head carried on a carriage at a specific location on a magnetic disc through the movement of a belt mounted to a motor spindle of a step motor. The magnetic head positioning mechanism pulls one end of a belt of which the other end is wound or unwound around a motor pulley, thereby to constantly apply a rotation torque and thereby to eliminate an adverse effect by a dead zone due to the hysteresis phenomenon of the step motor. Alternatively, the rotation torque is always applied to the step motor by pulling the carriage in an access direction, thereby to improve the positioning accuracy of the head.
Abstract: Disclosed is a movable magnetic head block assembly for a double sided flexible magnetic disk storage device, wherein a pair of mutually opposed disk contacting surfaces, at least one of which comprises an electromagnetic transducer head, are in contact under pressure with the opposite sides of a magnetic disk so that information can be recorded or retrieved from the disk. To enable the unimpeded exchange of disks, an arrangement is provided whereby at least one of the disk contacting surfaces is mounted on an individual flexibly mounted retractable support arm which is normally urged under pressure against a stop, in the direction of the disk to place the disk contacting surfaces in position for normal operation, but which can be retracted against that pressure, thus withdrawing the disk contacting surface away from the surface of the disk, so that the disk may be exchanged without impediment.
Abstract: An apparatus is disclosed for generating a television signal including a discrete electronic audio signal in synchronization with a discrete electronic video signal. A magnetic audio tape having a first track of digital information and a second track of audio information, the tracks being in synchronization, is played on an audio tape deck. The first track of digital information is converted into a corresponding digital electronic signal and the second track of information is simultaneously converted into the discrete electronic audio output of the television signal. A video character generator receives at its input the digital electronic signal from the first track and converts the digital electronic signal into the discrete video signal of the television signal.
Abstract: An improved disk file is disclosed including multiple independent transducer/actuator arrays disposed about a common disk (stack) and adapted to afford a plurality of alternate "Data-paths" whereby (virtually any) track on any disk may be accessed for data-in/data-out using a selectible one of several "data paths".In one type embodiment, this is implemented by switching-over between electronic-control stages when one such stage fails.In another type embodiment, it is afforded by providing overlapping track coverage by multiple head-units. Here, for any given (pair of) disk faces, each of several actuator arrays is assigned a respective set of tracks to cover as its "primary responsibility", also being assigned another adjacent set of tracks as its "secondary" (back-up) responsibility.Such arrangements can provide such benefits as "multiple paths to data", and can convert "Hard" failure to "Soft" failure.
Abstract: A thin film magnetic head has a substrate with thin film layers deposited thereon and a protector layer bonded by a bonding layer to the substrate, with the thin film layers interposed therebetween. The thin film layers includes components of an electromagnetic transducing means. The bonding layer is a glass having a working temperature at which a magnetic layer included in the thin film layers does not have the magnetic characteristics deteriorated to any substantial degree.The fusing of the glass for making the bonding layer is performed at a temperature below 450.degree. C.
April 16, 1981
Date of Patent:
December 20, 1983
Matsushita Electric Industrial Co., Ltd.
Abstract: Disclosed is a video tape recorder, which uses an endless magnetic tape where recording tracks are formed in the running direction of the tape and in which magnetic heads are moved in the direction of the width of the tape with every excursion of the tape. The video tape recorder includes two magnetic heads such that while one of them is being used for recording, the other spaced apart from the first-mentioned one by an amount corresponding to several tracks can be used to trace the recording tracks formed by the first-mentioned head for reproduction, and thus it is possible to obtain a time shift of video signal.
Abstract: A tape player for recording and reproducing sound. It is characterized in that it includes a first motor adapted to drive both a take-up reel and a capstan and a second motor which is selectively operated to drive said take-up or feed reel at high speed for fast forwarding or fast rewinding of the tape. Said selective operation is performed by gearing means including a second motor pulley, a sun gear, a second drive belt passed around the second motor pulley and the sun gear, a planet gear in mesh with the sun gear and a rocker arm to swing the planet gear between the feed and take-up reels. There is also provided a tape player having a group of feather touch type push buttons for recording, reproduction, fast forward and rewinding and switching off whereas only cassette ejecting operations are performed by mechanical means.
Abstract: Data representations are translated on a rotating disc utilizing multiple transducers at different radial positions. The disc is logically formatted into selected concentric bands. Within each band data representations are translated alternately in a repetitive sequence among a selected number of transducers characteristic of the particular band. By appropriately selecting band format parameters and increasing the characteristic number of transducers as a function of decreasing band radial position the track data density may be maintained within selected limits.
Abstract: An automatic cassette changer is provided for use with a cassette VTR of the type having push-buttons depressible for selecting at least recording, reproducing and rewinding modes, respectively, of the VTR, and a cassette holder movable between a raised position for receiving or delivering a cassette and a lowered position at which a cassette in the holder can have its tape acted upon by the VTR in a selected one of its modes.
Abstract: A case for a disc-shaped recording medium operates together with a disc-shaped recording medium reproducing apparatus provided with an inserting opening through which the case is inserted, a turntable for rotating the disc-shaped recording medium, and locking mechanism and engagement releasing mechanism provided at the innermost part of the disc-shaped recording medium reproducing apparatus opposite to the inserting opening with respect to the turntable. The case comprises a jacket having a space for accommodating the disc-shaped recording medium and an opening for allowing the disc-shaped recording medium to go in and out of the jacket, and a closing member inserted through the opening of the jacket for closing the opening of said jacket. The closing member unitarily has a pair of engaging arms on both sides thereof which can elastically bend. The closing member is locked by the locking mechanism upon insertion into the innermost part of the reproducing apparatus together wtih the jacket.
Abstract: A case for a disc-shaped recording medium is used in a disc-shaped recording medium reproducing apparatus. The reproducing apparatus is provided with a turntable for rotating the disc-shaped recording medium, closing member locking mechanism provided at the innermost part of the disc-shaped recording medium reproducing apparatus, and N detection switches provided at the innermost part of the reproducing apparatus and disposed asymmetrically on the left and right sides with respect to a line which passes through the center of the turntable in the disc insertion direction. The case comprises a jacket for accommodating the disc-shaped recording medium, and a closing member for closing an opening of the jacket and being locked by the locking mechanism and confront the detection switches upon the disc-shaped recording medium being loaded into the reproducing apparatus.
Abstract: An improved Bernoulli plate for juxtaposition to a rotating flexible magnetic disk so that the disk is rendered substantially rigid by a vacuum formed by the air between the plate and the disk being urged outwardly under the influence of centrifugal force is disclosed. The plate is formed by coining a metal substrate and thereafter electroplating the coined substrate so that any sharp irregularities resulting from the coining operation are smoothed, while the surface is provided with a hard, wear-resistant coating.
April 24, 1981
Date of Patent:
December 6, 1983
Anton J. Radman, Randall C. Bauck, Peter S. Kleczkowski
Abstract: A core for a magnetic head assembly includes a T-shaped ferrite member having an aperture for the transducing coil and a beveled edge along the top of the T. A ceramic body has a first slot in which the arms of the T-shaped member are positioned and a cross-slot which is deeper than the first slot. The vertical portion of the T-shaped ferrite core is positioned in the cross-slot.
Abstract: A magnetic tape setting device for use in a magnetic tape recording and/or reproducing apparatus having a magnetic head, a head positioning mechanism for positioning the magnetic head to engage with a magnetic tape set in the recording and/or reproducing apparatus, a tape advancing mechanism for advancing the tape, and a controller adapted to control the head positioning mechanism and the tape advancing mechanism for various predetermined mode operations, the magnetic tape setting device being so arranged as to automatically cause, in response to a start command signal, the controller to control the head positioning mechanism and the tape advancing mechanism for firstly CUE mode operation during which the trailing edge of the recorded area of the tape being detected, secondly RVW mode operation after the lapse of a first predetermined period since the detection of the trailing edge of the recorded area, also during the second RVW mode operation the trailing edge of the recorded area of the tape being detected
Abstract: A tape cassette comprises a housing of generally rectangular configuration containing reels on which a supply of tape is wound and having top and bottom walls and a peripheral wall extending between the top and bottom walls along three sides of the housing so as to form an opening along the fourth side of the housing, the top and bottom walls having first and second cutouts communicating with the opening and extending along a portion of said fourth side of the housing, respectively, the tape being guided between the reels in a path having a run extending along the opening, a front lid mounted on the housing and being movable relative thereto between a closed position covering the opening and an opened position exposing the opening and a back lid movable in connection with the movement of the front lid between the closed position wherein the back lid is positioned behind the front lid and the opened position wherein the back lid is taken away from the back side of the tape so that the run of the tape and be en