Abstract: A method of display control is disclosed for an audio tape deck having a display unit employing an array of light-emitting segments, whereby both data relating to playback audio signals and tape transport data can be selectively displayed in the same display region. Any change in operating status from a normal play mode of operation during display of audio playback signal data is sensed, causing changeover to display of tape transport data, and after a fixed time has elapsed following return to the play mode the display of audio playback signal data is restored.

Abstract: In a recording and reproducing apparatus (1) for record carriers (6, 7) in the form of a tape contained in cassettes (4, 5), comprising a reproduction deck (8) and a recording/reproduction deck (9), which each comprise a drive means (27), a scanning device (74), a positioning device (36) for positioning the scanning device (74), at least one drive element (38, 42) of the drive means (27), and a keyset (10, 11) for selecting the modes of operation of the two decks (8, 9), the two keysets comprise equal numbers of keys (79, 81, 82, 83, 84, 97A, 97B) and the "successive normal reproduction" mode can be obtained by actuating the key (97A) of the keyset (10) of the reproduction deck (8), which key corresponds to the key (97B) for the "normal reproduction" mode of the keyset (11) of the recording/reproduction deck (9), and the key (81) for the "normal reproduction" mode of the keyset (11) of the recording/reproduction deck (9), the first-mentioned key (97A) enabling the reproduction deck (8) to be set to "normal re

Abstract: A removable information inputting device which is removably provided with an electronic apparatus includes a keyboard for inputting an information of a program to be recorded, a memory for storing the information from the keyboard, a control circuit for controlling the input and the output of the information stored in the memory, and an optical transmission circuit for optically transmitting the information from the memory to the electronic apparatus.

Abstract: A cleaning disk is described that is made of a pair of layers of head-cleaning material which are translucent to light produced by a light source in a magnetic disk-reading machine. The layers are adhered with an adhesive having sufficient opacity caused by the addition of pigment to reduce the light transmitted through the layers from the light source enough to prevent sensing of the light by the corresponding light sensor. Fibers of the layers, when made of fabric, may extend through the adhesive to provide for permeation of a solvent from one layer to the other. The layers are preferably adhered by heat plastified thermoplastic polymeric adhesive which is compressed between non-heat-plastified layers and which is formed to have solvent-transmitting holes extending through it.

Abstract: A plug for a cassette without a recording tab is provided. The plug is adapted to be removably fitted into the protecting recess of a cassette. The plug comprises a bung (14) dimensioned to form a friction fit with the internal walls of the recess, and at least one tab (12) which extends away from the bung and is connected thereto. The tab allows the plug to be removed from the recess of the cassette once in place.

Abstract: A tracking indication system of a VCR to make a recognition to a user whether or not a precise tracking of a video head is achieved. The invention includes a peak value detecting and holding circuit for detecting and holding in a predetermined time a peak value of the reproduction output signals, a level shift circuit for lowering an output of said peak value detecting and holding circuit to a predetermined level, a LPF for filtering the reproduction output signal, a differential amplifier whose a non-inverting terminal is connected to an output of said level shift circuit and an inverting terminal is connected to an output of said LPF to amplify a difference voltage between output signals of said level shift circuit and said LPF, and a LED which is activated or deactivated by a transistor being closed or open in response to an output signal of said differential amplifier.

Abstract: Apparatus for use in cleaning a tape head comprises a cartridge in which there is a frame carrying tape head cleaner in the form of a spindle carrying a foam sponge cleaning roller. For reciprocating the tape head cleaner against a tape head in use of the apparatus, the frame is movable by any one of first, second and third rotatable shafts in the cartridge. The shafts are coupled with the frame and rotation of any one of them about its longitudinal axis causes movement of the frame.

Abstract: The present invention provides a floppy disk drive which can removably receive a cartridge containing a floppy disk and which can travel a READ/WRITE head to the desired track on the floppy disk while rotating the floppy disk at a constant speed for effecting the desired read/write action under an electric-magnetic conversion. The drive is of a top-up type which includes a frame portion and a carrier which can be popped up from the frame portion. The frame portion includes a spindle motor for directly driving the floppy disk, a plurality of positioning pins for positioning the disk cartridge relative to the spindle motor, and a carriage carrying the READ/WRITE head for travelling the head to the desired track on the disk. The carrier is pivotably supported by the frame portion and adapted to receive the disk cartridge. The cartridge can be loaded into the lower portion of the carrier upon popping-up of the carrier.

Abstract: A magnetic recording/reproducing apparatus for recording onto or reproducing from a magnetic tape housed in a cassette by using a rotary magnetic head having a tape withdrawal arrangement for winding a portion of the tape between the two reels in the cassette around the rotary magnetic head by a predetermined angle. A tape drive feed the magnetic tape at a constant speed, with a reel drive being provided for driving either one of the two reels so as to take up the magnetic tape in the reel driven by the reel drive, and with brake arrangement for braking the rotation of the reels. A ring-shaped cam operating member is provided in the outer peripheral surface or the inner peripheral surface thereof with cam surfaces each for effecting the operation of the respective elements in response to the mode of operation of the magnetic recording/reproducing apparatus.

Abstract: An automatic disc separating and feeding apparatus for a disc copying machine is disclosed which is capable of effectively preventing the damage to a disc and/or an envelope thereof during the operation. The apparatus includes a disc sucking and sliding device for sucking up an uppermost one of the stacked discs which includes a stationary plate and a sliding plate each provided with through-holes adapted to form together air vents varied in size depending upon the position of the sliding plate to lift the disc up by action.

Abstract: An easily operable recording/reproducing apparatus of double cassette type having a master tape and a slave tape is disclosed, which is adapted to operate each of these tapes in a plurality of modes including recording, playing back, rewinding, and fast-forwarding modes. The recording/reproducing apparatus comprises a first operation button for operation of the master tape, a second operation button for operation of the slave tape, and a third operation button for dubbing operation from the master tape to the slave tape. A microprocessor is adapted to detect depressed buttons and a number of times of depression of each button, and controls so that each of the master tape and the slave tape is operated in operation mode in accordance with the detected result. When the third operation button is depressed, dubbing operation from the master tape to the slave tape is performed. When the second and third buttons are depressed simultaneously, recording on the slave tape is performed.

Abstract: Azimuth angle of the capstan of a magnetic-tape-cassette apparatus is measured using a cassette having a reference sensor which engages the cassette, and at least one measurement sensor which engages the cassette at a location spaced axially from the reference sensor. The measurement sensor includes an electrical measuring element such as a strain gauge which provides an indication of the position of the element with respect to the reference sensor. The azimuth angle can readily be computed using the known axial spacing between the sensors and the electrical value transmitted from the measurement sensor.

Abstract: A disk file comprises a disk stack subassembly and a head positioning actuator each mounted on opposite sides of a central box frame. The disk stack subassembly has a non-rotating central spindle and an in-hub electric motor whose stator is mounted on the spindle. The rotor of the motor is mounted internally of a hub supported for rotation about the spindle by two bearings at opposite ends of the spindle. A stack of disks is mounted externally on the hub. The box frame is open to one side and the opposite ends of the stationary spindle are located and fixed in the frame so that the disk stack subassembly spans the open side. Because of the symmetry and rigidity of the design, susceptibility to thermal or vibration induced misregistration is reduced. Finally a cover completes the enclosure.

Abstract: A device for storing and retrieving cassettes includes a casing in which a plurality of cassettes are stored in a radial array about a vertically disposed axis. A carrier for transferring a selected cassette from the casing to a processor is pivotally mounted on the same axis as the casing for rotational movement about said axis. The carrier device is vertically moveable for alignment with different radial arrays of cassettes and the carrier is provided with a cassette gripper device which is horizontally moveable into said casing for gripping a selected cassette. The cassette gripping means is also mounted for rotational movement about a horizontal axis on the carrier device so that the cassette gripped thereby may be rotated to present one side or the other of a double sided disc within the cassette for processing.

Abstract: A magnetic tape cassette having an upper half, a lower half and a front lid with a front plate and first and second side plates with first and second bearing shafts extending from the side walls, and the upper half formed with bearing means for receiving the first and second shafts which have guiding ramps which are continuously formed and which continue into a circular opening formation of fixed radius of greater than 180 degrees and which provide self-centering and self-aligning for the shafts.

Abstract: A video recording and reproducing system provides an operator with the ability to view the status of all operating conditions of a system at one time. When it is desired to view the status, an operator generates a request for a display mode. In this mode, all of the operating conditions are displayed on the television signal monitor in place of normal television signal image information. Information regarding the status of each condition is presented to a character generator, which causes the appropriate status to be placed next to each condition listed on the monitor. All of the information relating to the configuration of the system is thereby provided to an operator at once, and can be viewed not only at the location of the system itself, but also at any remotely located monitors, such as those found in a control booth.

Abstract: A card is provided for cleaning transducer heads of magnetically-encoded card reading machines. The card includes a surface region disposed for contacting such a transducer head and releasably holds a head cleaning solvent adjacent the surface region. The material forming the surface region may be visually distinguishable when it is holding solvent as compared to when it is not. Further, this material may be translucent when holding solvent. If so, the material immediately next to the solvent-holding material is a color which is visible through the material. Also, the card may have layers which are joined by heat-bonding. The side of the card opposite from the surface region then preferably is another color.

Abstract: An adapter for enabling the signals produced by one type of playback device, such as a compact disc player, to be reproduced as audio sounds by a cassette player audio system, the latter having a conventional cassette playback deck. The adapter is comprised of a housing having a configuration substantially identical to the configuration of a cassette normally used with the playback deck. The adapter housing has at least one opening to receive the usual reel-drive spindle of the playback deck; and a record head is supported in the housing in a position for contacting the usual playback head of the deck when the adapter is received, or loaded into that deck. The adapter is connected to the playback device (e.g. the compact disc player) by a plug connected to the usual headphone jack of the player, whereby signals produced by the player are supplied to the record head from which they are coupled to the playback head of the cassette deck for reproduction by the audio system.

Abstract: A magnetic tape driving device for a tape recorder or like machines wherein a base plate is partially formed from a synthetic resin material while eliminating possible mechanical and thermal shortcomings which may be resulted from employment of such a synthetic resin part for the base plate. The base plate of the magnetic tape driving device is composed of a metal plate and an overlying synthetic resin plate plate, and a bearing metal member is securely mounted on the synthetic resin plate for supporting a capstan thereon. The bearing metal member extends through an opening formed in the metal plate and is resiliently pressed against a receiving portion by a resilient contacting piece both formed on the metal plate thereby to position the bearing metal member and hence the synthetic resin plate relative to the metal plate.

Abstract: An apparatus has a part which can be moved to an operating position by an actuating device, in response to movement of a button to an on position. Upon movement of the part to its operating position, a latching member directly associated with the part latches the button in its on position. Upon sensing a predetermined condition in the apparatus, a control member prevents the transmission of the actuating movement by the actuating device to the part, and a user becomes aware that the part has not moved to its operating position because the button does not become latched in its on position.

Abstract: A method of determining the elapsed and/or still available playing time of a magnetic tape. First, the time the spindle takes to rotate once is measured. The number of coils on the spindle are calculated from the spindle diameter, tape thickness, and duration of rotation. The results are entered in a counter that from that time on adds or subtracts one pulse per winding direction and per revolution. The counting results are compared with a table of times layed out in one-minute steps and the resulting minute values displayed.

Abstract: A cassette comprising a housing made of two portions having a front surface provided with an aperture through which access can be had to the video tape, this aperture being closed by a flap/hingedly mounted to the cover. This flap is locked by a bolt consisting of a lever of synthetic material molded integrally with a resilient arm acting as a return spring and which is engaged by a notch on a lower boss on which it is held by a boss rigid with the cover. The lock can be introduced freely into its recess and positioned automatically when fitting the cover. The release is obtained in the known manner through a window.

Abstract: An interconnection assembly permits a Winchester-type rigid magnetic disk storage unit, inclusive of the disk drive mechanism, to be plug-in removable from a systems unit or an add-on peripheral data storage subsystems unit of a personal computer system.

Abstract: A plunger operating mechanism in a tape player comprises: a head lock plate linked to a head plate normally biased to its withdrawal position by a stop mode spring; a drive means engaging the head lock plate to pull it in a direction for advance of the head plate; a lock means to lock the head lock plate brought ahead by the drive means to place the head plate at the advance position; stress plates individually linked to two attractive plungers and locked by the plungers when energized so that the engagement between the head lock plate and the drive means is maintained by a least one stress plate locked by the energized plunger; fast-forwarding and rewinding control plates linked to the two stress plates to establish the fast-forwarding or rewinding mode so that one of the control plates is set in the fast-forwarding or rewinding mode when one of the plungers is energized but neither control plate is set in a mode other than the fast-forwarding and rewinding mode in which both plungers are energized; position

Abstract: A cleaning apparatus for cleaning the heads of tape player/recorder units in which, when the cleaning apparatus is operably loaded into the unit, movement of a spindle of the unit turns a cleaning element positioned against the head. Transmission of the rotary movement of the spindle is achieved by a rotatably mounted drive connected to a cleaning element, such as a felt pad, so that as the spindle rotates, the cleaning element is rotated against the head about an axis substantially perpendicular to the plane of the face of the head of the unit. A tape drive cleaning assembly is included which cleans the pinch roller and capstan of the unit.

Abstract: Apparatus for use in cleaning the tape of a tape cassette comprises: a housing; an aperture defined by the housing whereby a tape cassette can be inserted into the housing; an opening defined by the housing through which a tape cleaning device can be inserted into the housing; drive means in the housing for causing the tape of a tape cassette inserted into the housing to be driven past the cleaning device in contact therewith to be cleaned; and electronic logic control circuitry in the housing for controlling the drive means in response to insertion of a cleaning device and a tape cassette.

Abstract: A tape position display apparatus including a circuit for generating first electrical pulses in response to transport of a tape, a first counter for counting the first electrical pulses, a circuit for generating second electrical pulses from a control track signal recorded on a tape in response to such transport, a second counter for counting the second electrical pulses, a subtracter for detecting the difference between the first and second counts and producing a difference signal proportional thereto, and a comparator for comparing the difference signal with a predetermined value. The second counter counts in a direction which is controlled by the compared result from the comparator, and the tape position is displayed in response to the difference determined by the subtracter.

Abstract: A disk drive shock mount is provided which attenuates shocks and vibrations to a disk drive (1, FIG. 1). The mount comprises a cradle 20 which is affixed to the disk drive housing, and a mounting plate 10 which may be used to suitably secure the disk drive assembly 1 to the next higher level of assembly. Flexible, compressible vibration isolators 50 of rubber or plastic are used to couple the cradle to the mounting plate. Rigid pins 70 on the cradle mate with grommet-enclosed apertures 60, 61 in the mounting plate to limit the degrees of motion permitted between the cradle and the mounting plate.

Abstract: An operating mechanism for a small portable cassette tape player/recorder which does not require separate operating buttons to play and record. Operation of the player is effected by pushing the cassette toward the recording/reproducing head. Playing/recording is stopped by pushing the cassette again. This push-push mechanism obviates the need for operating buttons, and decreases the size of the player.

Abstract: A magnetic tape cartridge is provided with a pressing spring secured to a cartridge to press a spring-contact projection formed at the center of the upper part of a reel. The pressing spring includes a reel-contacting part formed at its inner part, a spring-functioning part holding the reel-contacting part and a base plate connected to a root portion of the spring-functioning part. The reel-contacting part presses the spring-contact projection of the reel downwardly so that a pressing force acts on the reel in its axial direction.

Abstract: A cleaning cassette for the read/write heads of magnetic tape recorders is disclosed in which an interchangeable cleaning device 23 is mounted to a supporting member 16. This supporting member can be moved back and forth manually or by means of a driving force being internal to the cassette, such as a spring.

Abstract: An operating mechanism for a cassette deck, particularly, a double-type cassette deck, with the use of which the overall size of the deck is significantly reduced. A swingable cassette holder is arranged to open and close a cassette container section within the body of the deck. A lock mechanism is provided for locking the cassette holder in the closed state thereof with respect to the cassette container section. An operating button for controlling the locking and unlocking operations of the lock mechanism is provided within the cassette holder.

Abstract: A protected switch unit is provided in a cassette tape recorder employing a single motor for driving a power transmission system for transferring a cassette holder and a power transmission system for loading and unloading the tape of the cassette loaded on the cassette tape recorder. The protected switch controls the motor for sequential cassette inserting operation and tape loading operation and for sequential tape unloading operation and cassette ejecting operation. A protective member for protecting the switch unit from dust is interposed between a circuit board having stationary contact terminals and a machine element of the power transmission system, carrying a movable contact terminal so as to seal the switch unit from dust.

Abstract: The frictional coefficient and triboelectric current that exist between the magnetic-head carrying slider and the surface of a magnetic disk when both are in sliding contact are reduced by an appropriate pre-conditioning. The pre-conditioning comprises running the head-disk assembly for at least several minutes at a low velocity of, e.g. 200 to 400 rpm, in a dry gas atmosphere. By this pre-conditioning the lifetime of lubricated head-disk assemblies is increased.

Abstract: A housing for a magnetic disk memory comprises a support shell and a cover for housing a magnetic disk pack and a rotational positioner. The disk pack is provided with two bearing locations one of which is secured to one lateral wall of the support shell and the other of which is defined by a slot open toward the edge of the supporting shell in an opposite lateral wall for receiving a disk pack bearing bushing. A seal is provided between the support shell and the cover for a dust-free seal of the interior of the housing, the seal being a closed sealing ring which is pinched at the parting plane between the support shell and the cover. The seal comprises a perpendicularly projecting semi-circular extension in the region of the slot--which encompasses the bearing bushing and is fixed to the exterior of the lateral wall in a recess formed therein.

Abstract: A recording-tape-reel assembly, such as used with a computer, has an electronic tag to enable the presence of the assembly to be detected in a presence detection system in order to inhibit the unauthorized removal of the assembly from premises equipped with such a system. The assembly includes a reel for holding a recording tape, an electronic tag for enabling detection of the presence of the assembly in a presence detection system, and a housing that isolates the electronic tag from the recording tape and makes the tag inaccessible to users of the assembly. Electronic tags are housed in both reels and cassettes that contain reels.

Abstract: A flexible magnetic disk drive to be mounted between, and fastened to, a pair of opposed holder plates forming parts of the housing of a data processing instrument such as a computer or word processor. The disk drive has a base structure comprising a platform, on which there are mounted such standard components as a drive drive mechanism and a head transport mechanism, and a pair of side walls on the opposite sides of the platform. Usually in the form of an aluminum die casting, the base structure would suffer deformation if it were fastened directly to the holder plates, due to positional errors between their screw holes. The deformation of the base structure is avoided by coupling the base structure to the holder plates via a pair of connectors which are fastened to the opposite side walls of the base structure. Each connector has a pair of lugs each having a hole formed therethrough for receiving screws or like fastener elements passing through holes in the holder plates.

Abstract: A channel changing mechanism in a tape player includes a pinch roller change plate for alternatively bringing a pair of pinch rollers to and apart from a pair of capstan shafts, and a power plate movable to its forward-mode, reverse-mode and neutral positions responsively to the pinch roller change plate and a power gear engageable with the power plate and formed with two chipped portions along its geared circumference to be opposed to a motor-driven gear when the power gear is locked. The power plate is locked at the forward-mode or reverse-mode position with a delay corresponding to a half revolution of the power gear after the source power is supplied to the tape player.

Abstract: A variable mode numerical display for a record/playback device normally displays a numerical count representing the present position of the record medium used with that device and is operable to interrupt this normal display so as to display the number of a message that was last-recorded or that is in position for playback or to display the number of an instruction that was last-recorded or that has been reached. Also, a bar graph display is comprised of plural visual display elements which are selectively energized as a function of the interval that separates successive pulses that are generated in conjunction with the movement of the record medium. The variable mode and bar graph displays are controlled by a processor.

Abstract: A protective jacket, in particular for recording media, preferably magnetic films, is provided with at least one stiffened region in the immediate vicinity of the read/write area, thus permitting more thorough cleaning of the recording medium and smoother running of the latter. Stiffened region(s) can be produced economically by printing on strips of ink.

Abstract: An information processing apparatus such as a computer of the class for office and home use is disclosed which employs a magnetic disk cartridge as an information storage medium, together with a disk drive assembly for information transfer with the disk cartridge. The apparatus has a housing having defined therein a disk drive compartment, in which there is accommodated the disk drive assembly inclusive of its own enclosure having an entrance slot for the insertion of the disk cartridge. Upon full insertion of the disk drive assembly into the disk drive compartment, the disk drive assembly is locked into position by a locking lever which, under the influence of a cantilever spring, engages a first opening in the disk drive assembly.

Abstract: A video recording system enables self-service production of vended videocassette recordings to a user or customer, with user control of several features. Preferably the system includes forming a composite video picture with the user's image in combination with a user-selected background sequence. Compositing may be by chromakeying, with a key color as a backdrop behind the user in a recording booth. As the composite video recording is made the user preferably is able to watch the composite image on a monitor, which may also include prompting messages for the user. A preferred control for the system involves control data encoded on a videodisc, which also holds a plurality of selectable background sequences.

Abstract: This cleaner cartridge for cleaning read, record, entrainment and guide parts in audio, video, and magnetic tape apparatus comprises a reservoir for the special liquid or detergent incorporated in the cartridge and removable, assemblable, refillable or replaceable as required. This reservoir is connectable to the cartridge body in any fit and is formed preferably from a soft material in any color, also transparent.

Abstract: A method of aligning a tape head with the use of a calibration head that is adapted to produce a calibration tape having a pair of spacedly disposed write signals extending substantially normal to the direction of tape travel but at opposite small equal angles to the normal. The calibration tape is passed over the tape head that is to be aligned. The calibration tape is read to detect sequential write signals to determine differences in amplitude therebetween so that the azimuth of the tape head may be adjusted until the detected write signals are of equal amplitude.

Abstract: A device for variably adjusting a moment of inertia of a drum of a videocassette recorder. The device comprises a plurality of inertial masses adapted to add a variable increment of a moment of inertia to a moment of inertia of the drum. In virtue of the possibility of varying the moment of inertria of the drum, it is possible to check the frame condition of the recorder, and thus, to obtain an optimum frame condition.

Abstract: A magnetic disk cartridge comprises a case, a flexible magnetic disk sheet rotatably housed in the case, and at least one liner secured to an inner wall surface of the case facing the magnetic disk sheet so that the liner contacts the magnetic disk sheet. The liner is constituted by a nonwoven fabric for contact with the magnetic disk sheet, and a chemical dust attraction layer secured to the inner wall surface of the case.

Abstract: A tape drive mechanism includes a first gear assembly having a first gear mounted on a shaft driven by a motor and a second gear slip-frictionally coupled to the shaft in coaxial relationship with the first gear. Third and fourth slip-frictionally coupled gears form a second gear assembly which are engaged with the first gear and a takeup reel drive gear, respectively, during playback modes. A third gear assembly is provided to engage with the second gear and the takeup reel drive gear during fast-forward modes. Further included is a fourth gear assembly which is engageable with the second gear and a supply reel drive gear during rewind modes. A timing lever is provided to prevent the fourth gear assembly from engaging with the second gear and the supply gear until recording mode is completely terminated should a manual command for rewind operation occur during such modes.

Abstract: The invention is a head positioning assembly (10) for use with a conventional disk drive (12). The assembly (10) is adapted to position the ready/write head (22) on a rotating diskette (21) and includes a locating disk (30) provided with a cardioid cam groove (32). A cam follower (46) rides within the cam groove (32) and thereby causes a carriage (40) to move radially between a pair of guide rods (42 and 44) to position the read/write head (22). The locating disk (30) is caused to rotate by selectively activating a solenoid (98) which causes an idler assembly (72) to contact the locating disk (32) with a moving idler belt (90). The idler belt (90) is indirectly powered by the same brushless DC motor (16) which powers the disk drive (12). A sensing subassembly (50) senses a zero position aperture (34) and a plurality of tract position apertures (36) and acts in conjunction with external circuitry (600) and the solenoid (98) to control the rotation of the locating disk (30).

Abstract: A spindle assembly for magnetic disks of both-end support type has a hub for fixing the disks, a shaft to which the hub is fixed, a pair of bearings which are spaced in vertical or horizontal direction, a pre-loading spring for pre-loading one of the bearings, and a housing composed of housing parts which accommodates the hub, shaft, bearings and the pre-loading spring. The spindle assembly further has an axial reference surface formed on the hub at a right angle with respect to the shaft, and another axial reference surface formed on one of the housing parts at a right angle with respect to the vertical portion of the bearing associated with the one of the housing parts. When the shaft is mounted in the one of the housing parts with the hub and the pre-loading spring fitted therearound, the hub is axially urged by the spring such that the axial reference surface thereon is brought into abutment with the axial reference surface on the one of the housing parts.

Abstract: An improved motor assembly including a brushless D.C. motor and an annular member defining a platform for the drive electronics and speed control circuits of the motor. The member is carried on a fixed support within the outer envelope of the motor and includes a thin disk-like body providing a pair of opposed surfaces for mounting the components of the circuits. The fixed support of the motor has a flat annular face surrounding the drive shaft of the motor, and the annular member engages and is secured to the flat face of the support in surrounding relationship to the shaft. In a preferred embodiment, the housing of the motor defines part of the rotor of the motor and is for rotation with the shaft. A flange is secured to the support near the opposite end of the shaft for mounting the motor on a fixed support, such as on the base of a housing forming a part of a disk drive unit.