Abstract: A rotary head for use in a magnetic recording and reproducing apparatus includes a fixed cylinder, a rotary cylinder opposed to the fixed cylinder, two electrically controllable movable elements mounted on the rotary cylinder so as to be 180.degree. apart from each other, at least two magnetic heads secured to the movable elements, respectively, at least one reference surface provided on the rotary cylinder, and a vertical position detector element for detecting the vertical position of the movable elements and that of the reference surface. The rotary head further includes a control system for controlling the movable elements in response to an output from the vertical position detector element so that the magnetic heads may be located at a predetermined vertical position with respect to the vertical position of the reference surface.

Abstract: A head drum ground system for use with a VCR comprises an electrical coupler which is located and arranged in an inner space of the head drum assembly so that a rotary drum is electrically connected with a stationary drum within the VCR. As a result, static electricity occurring on the surface of the rotary drum is transmitted to a deck supporting the stationary drum, through a boss member, the electrical coupler, an outer ring of a bearing, and the stationary drum, in that order.

Abstract: A tape running device of a video cassette recorder. This device comprises a capstan shaft, an arm pinch having both a tape guider and a rotatable pinch roller, a holder provided under the arm pinch in order to elevate, lower and rotate the arm pinch, a gear pinch engaging with the holder for guiding the elevating and lowering motion of the holder, a guide plate engaging with the holder for causing the holder to be vertically elevated and lowered, a take-up arm rotatably mounted on the main plate and having a shaft for pulling the tape out of a tape cassette, and a connection gear gearing into both the gear pinch and the take-up arm in order to transmit the rotational force of a drive motor to them and rotating the holder in order to rotate the arm pinch toward the capstan shaft. The tape is run under the condition that its nonmagnetic surface is wrapped about both the tape guider and the pinch roller.

Abstract: A head drum and tape transport driving device for a video tape recorder which can transport the magnetic tape by means of one motor used for driving the had drum. Supply and take-up reels are provided for supplying a data-recordable tape and winding up the same. A head drum carries a head for recording and/or reproducing data on or from the tape. A motor drives the head drum and a tape transport device transports the tape past the head drum. A first power transmission transfers motive power from the motor to tape transport device and a second power transmission selectively transfers motive power of the tape transport device to the supply reel or the take-up reel.

Abstract: A system for heating a tape drive includes a heating element which is actuated by the same voltage that drives the motor. An electronic switch is responsive to the motor voltage and turns the heating element on when the motor is not running and off when the motor is running.

Abstract: A bearing arrangement (15), in particular for a device (1) with a rotatable disc or a magnetic-tape apparatus (101) has a shaft (19) which is connected to an auxiliary member (23) via a hinge (21). The shaft (19) is radially supported and the auxiliary member (23) is axially supported. As a result of the connection via a hinge (21) the auxiliary member (23) can align itself without the alignment of the shaft (19) being influenced, so that the requirement imposed on the accuracy of the bearing surfaces of the shaft (19) relative to the bearing surfaces of the auxiliary member (23) can be less stringent.

Abstract: A magnetic recording/reproducing apparatus (VTR, Camcorder, DAT and the like) which can record and reproduce image signals and audio signals on a magnetic tape. The magnetic recording/reproducing apparatus is equipped with two magnetic head drums having mutually-opposing set-up angles and rotating directions, with one head drum for recording signals or reproducing the recorded signals on the upper domain of a tape when the tape is played in a first direction and with another head drum for recording signals or reproducing the recorded signals on the lower domain of a tape when the tape is played in an opposite direction. The magnetic recording/reproducing apparatus can record or reproduce in both directions, eliminating the drawback of compulsory rewinding after reproduction, and thus enabling long duration of recording and reproduction by doubling the usage time of the tape.

Abstract: The present invention relates to a rotary drum unit in a helical scan type magnetic recording/reproducing device for use with a video tape recorder, digital audio tape recorded, or the like and is intended to permit the stable run of the tape with highly accurate formation of track patterns. In the helical scan type rotary head drum unit of the present invention, a dislocation of the tape upon the drums having no lead is detected by tape position sensors arranged along a guide line and the rotary head is moved in the axial direction of the drum by driving a dynamic tracking actuator in a manner to correct the deviation of the tape from the guide line.

Abstract: A magnetic head actuator for displacing magnetic heads in a VTR or the like for the purpose of a tracking action includes a magnetic member arranged to form a magnetic path having an air gap, a coil bobbin disposed within the air gap, and an elastic support member arranged to carry the coil bobbin in such a manner that the coil bobbin is displaceable within the air gap. The elastic support member has a projection formed at a part where the elastic support member is secured to the coil bobbin. At least one magnetic head is secured to a fore end of the projection. A through hole is arranged in the middle part of the projection to allow a part of a yoke constituting the magnetic member to pierce through the through hole.

Abstract: A rotary magnetic head apparatus comprises a transformer core, including a rotor core and a stator core, a rotary drum, a stationary drum, and magnetic heads provided in the outer peripheral portion of the rotary drum. Signal transmission coils are disposed in a plurality of grooves formed concentrically in a surface of the core to transmit signals to and from the magnetic heads. Windings of each of the coils are positioned and lined with a flexible insulating layer so as to keep their mutual positional relation unchanged. The insulating layer is removed from the coil at portions corresponding to starting and terminating ends of the winding thereof. The insulating layer is bonded to the bottoms of the grooves. Through holes are formed in the core at positions corresponding to the starting and terminating end portions of the windings of the coil.

Abstract: The present invention concerns a filter system for a helical scanner drum of the type having a drum cover provided with an air vent. The filter system includes a replaceable air filter element for entrapping airborne particles when air is drawn through the filter element and means for removably securing the filter element to the drum cover such that the filter element covers the air vent.

Abstract: A video cassette recorder, in which the head-drum angle is controlled by a control voltage which varies according to the tape speed detected from the frequency or a capstan motor applied by a frequency detecting portion at a first stage. Then, based upon the Fuzzy theory, the video head of head-drum can be maintained at a constant angle with the pitch (P) of a video tape independent of the tape speed by reproducing the control voltage by means of a detected membership function detected according to the gain difference (G) coming from a gain detecting portion.

Abstract: According to the invention, there is provided a rotary head type magnetic recording/reproducing unit comprising a drum for receiving in close contact a magnetic tape on its periphery and a pair of magnetic heads arranged on the drum for running slantly on the magnetic tape for recording or reproduction of signals, wherein the span of contact of the drum's periphery and the magnetic tape is greater than that of a signal recording or reproducing operation on the magnetic tape by either of the magnetic heads. With such an arrangement, signal recording or reproducing operations of the unit can be conducted under a condition where the tape and the magnetic head are stably in contact with each other and therefore any distorted or deformed envelope waveforms may be eliminated.

Abstract: In order to prevent the staining of magnetic heads of a magnetic recorder in a low humidity environment, a refrigeration device which refrigerates a magnetic tape is positioned so as to engage the magnetic tape prior to the tape engaging the magnetic heads. The refrigeration device comprises either a refrigeration post or a refrigerated semi-closed space and functions to transfer water to the magnetic tape.

Abstract: A rotary head assembly has a first positioning surface and a second positioning surface provided in a rotary yoke. The first positioning surface contacts an end surface of a rotor of a rotary transformer. The second positioning surface contacts an outer peripheral surface of the rotor of the rotary transformer. A rotary yoke is fixed on the rotor by magnetic force by a motor. The rotary yoke is positioned by the first positioning surface in a thrust direction, and by the second positioning surface in a radial direction. Thus, the rotary yoke can be easily and precisely attached.

Abstract: A magnetic head drum of a helical-scan type for video data recording and reading apparatus comprises upper and lower stationary drums securely mounted on a spindle, an intermediate member rotatably supported on the spindle between the drums, and a motor for rotating the intermediate member. The motor comprises a rotor secured to the intermediate member, a stator secured to the upper drum, and a back yoke connected with the rotor through a back yoke retainer such that the stator is interposed between the rotor and the back yoke. This arrangement of the magnetic head drum contributes to effective damping of an electromagnetic noise of the motor caused due to vibration of the stator and back yoke.

Abstract: A magnetic recording/reproducing apparatus includes a main printed circuit board on which at least a part of a signal processing circuit is provided, a frame into which the main printed circuit board is fixed, a chassis on which a rotary head cylinder carrying a magnetic head, a supply reel table, a take-up reel table, and at least one motor for driving the cylinder, the supply reel table, and the take-up reel table are mounted, and a hinge mechanism for providing an electrical connection between the main printed circuit board and the chassis and for permitting the chassis to pivot between a first position in which said chassis, at a part of a bottom thereof, is in contact with and in parallel to the main printed circuit board and a second position in which the chassis is apart from the main printed circuit board to project out from the frame.

Abstract: A low profile header assembly for an encapsulated instrument includes a plate member with a cavity which is on the side of the plate member external to the instrument. Terminal pins extend through the plate member both within the cavity and beyond its periphery. Hybrid amplifier circuitry is disposed within the cavity and electrically connected to the pins within the cavity. The cavity is hermetically sealed and the internal components of the instrument are electrically connected to the terminal pins within the instrument shell.

Abstract: A tape recorder and reproducer machine has a rotatable head drum carrying a plurality of heads for recording a signal onto a cassette-type magnetic tape and for reproducing the signal recorded on a cassette-type magnetic tape. The machine comprises a cassette chamber for receipt of a tape cassette, a protective member movable between first and second positions, and a drive for moving the protective member to the first position between the cassette chamber and the head drum to protect the head drum from damage when the tape cassette is to be placed into or discharged from the cassette chamber. The drive moves the protective member from the first position to the second position allowing access from the head drum to the magnetic tape when the tape cassette is received in the cassette chamber.

Abstract: An improved helical read/write head is disclosed having a cross-cut groove disposed on the lead sloping surface thereof to improve reliability. The cross-cut groove is positioned between the magnetic gap of the helica head and an initial head/tape interface region of the head and is preferably oriented perpendicular to the longitudinal axis/direction of travel of the tape. The cross-cut groove may be particularly positioned to accommodate and dampen tape disruption attendant to initiating the helical head/tape interface.

Abstract: The present invention relates a helical scan-type magnetic recording and reproducing for use in VTR or DAT. This apparatus includes a head scanning mechanism which helically scans the tape (3) that runs in parallel with a reference plane using a head (4) rotatable along a slit (5) formed aslantly relative to the drum shaft (6) between the upper and lower fixed drums (2) and (1) arranged perpendicularly with respect to the reference plane. This mechanism consists of a rotary member (30) disposed concentrically with the upper and lower fixed drums (2) and (1), a linear guide (10) or (31) provided for the rotary member (30) to slide in a direction in parallel with the center of rotation of the rotary member near the head, a head (4) provided for the linear guide (10) or (31), and a cam mechanism (16) or (32) which gives axial displacement to the head (4) in the same direction as the slit (5) relative to the stationary cylindrical members (1), (2), (40).

Abstract: In the magnetic recording characteristics of recording apparatus, when there are three or more magnetic tips disposed on one head base, the extension lines in the depth direction of the head tips pass through the central line of the cylinder. The both outermost head tips on the head base disposed in one window of the cylinder possess head gaps as dummy head, but do not have the function of magnetic recording characteristics of recording, reproducing and erasing. In the disclosed multiple magnetic head, the materials of the head tips on one head base including the dummy head are the same.

Abstract: A video tape recorder comprising two video decks; one assigned to recording video signals and the other assigned to playing them back immediately in order to check if the recording has been made properly to create a means by which viewers never fail to record.

Abstract: The specification discloses a magnetic recording signal reproducing apparatus for controlling a magnetic tape and reproducing magnetic heads.In the magnetic recording signal reproducing apparatus of the invention, a magnetic tape which is moved for magnetic heads attached to a rotary cylinder is traced by the magnetic heads and signals recorded on tracks of the magnetic tape are reproduced. A construction of the apparatus includes a tracking control system, a tape tension control system, and an apparatus for selectively switching operations of both of the control systems.

Abstract: The present invention relates to a tape recorder system with a tape recording device and a playback device independently operable in time. The tape recorder system includes a recording sub-assembly provided with a feeding reel and a recording device, and a playback sub-assembly provided with a playback device and a receiving reel. The system according to the present invention also includes a circular intermediate reel between the recording subassembly and the playback sub-assembly, the intermediate reel comprising at its periphery a retractable bearing surface and a drive roller from which the tape is directed towards the playback sub-assembly. The playback subassembly is fastened to the intermediate reel and driven in rotation therewith.

Abstract: A tape cassette comprises a housing and a pair of reels mounted for rotation in the housing. A recording tape is wound on the reels and extends therebetween for transport from one of the reels to the other. The housing is formed with an opening through which a transducer can gain access to the recording tape for recording or reproducing signals on or from the recording tape. Front and back lids are connected to the housing and movable between a closed position wherein the front and back lids block the opening and form a channel capable of enclosing the recording medium at a front portion of the housing and an open position wherein the front and back lids are displaced from the opening and from the recording medium. The back lid is formed to leave a pair of gaps near either end thereof capable of accommodating passage of the recording medium therethrough when the front and back lids are in the closed position.

Abstract: A tape cassette include a housing and a pair of reels for rotation and translation in the housing so that the reels can assume either of first and second relative positions. A recording tape is wound on the reels and extends therebetween for transport from one of the reels to the other. The housing is formed with an opening through which a transducer can gain access to the recording tape for recording or reproducing signals on or from the recording tape. The reels in the first relative position conform to a first arrangement of a drive for driving the reels in rotation and afford a predetermined amount of space for accommodating a transducer within the housing for access to the recording tape and in the second relative position conform to a second arrangement of a drive for driving the reels in rotation and afford an additional amount of space for accommodating the transducer within the housing for access to the recording tape.

Abstract: A rotary head drum having at least one stabilizer installed in a magnetic tape recording and/or reproducing apparatus is described, in which at least one stabilizer is provided to bring about the stability of the traveling of a tape which travels while in contact with the circumferential surface of a drum. The stabilizer has a circular plane of a predetermined diameter, and the circular plane is mounted in a lower fixed drum to be partially in contact with the tape, thereby rotating with the tape at the same linear velocity. The tape only slightly vibrates while traveling in contact with the stabilizer, and travels with stability. Noise due to jitter, wow and flutter caused by the tape vibration is eliminated in the picture and sound. This rotary head drum is utilized in a video cassette recorder, digital audio tape recorder, etc.

Abstract: The rotary magnetic head apparatus of this invention exhibits an optimum transfer characteristic similar to that in the conventional apparatuses even when the number of coil turns for the magnetic head is reduced to 10 or less. This is achieved by setting the number of secondary winding turns for the rotary transformer to 16 or less and by setting the number of primary winding turns for the rotary transformer in such a way that a product of a step-up ratio--defined as the number of secondary winding turns divided by the number of primary winding turns--and the number of coil turns will be around 50. This reduction in the number of turns of coil on the magnetic head, from 20 or 25 with the conventional apparatus to less than 10, results in a substantial reduction in the cost of magnetic head and therefore the rotary magnetic head apparatus.

Abstract: A flying erase head for flying erasing which is used for improving the picture quality is provided on a rotating drum so as to be spaced substantially 180 degrees from the video head having first and second video head chips integrally fixed on a video head base. Therefore, a high picture-quality helical scan type magnetic recording and/or reproducing apparatus can be provided which is able to prevent the picture quality from being deteriorated by the vibration of the video head due to the rotation, and to satisfactorily make the over-writing on the tape and the assemble mode operation upon recording.

Abstract: A magnetic transducer has a transducing gap that is wider than that used for transferring information signals with respect to a magnetic record medium. A magnetic control flux is applied to the transducer to enable a selected segment of the transducing gap, which defines a transducing zone, for transferring information signals with respect to a selected path along the magnetic record medium. Registration of the transducing zone over the selected path is maintained by varying the applied magnetic control flux to thereby move the transducing zone along the wider transducing gap so as to compensate for deviations between the path traced by the transducing zone over the magnetic record medium and the selected path.

Abstract: A magnetic recording and/or reproducing apparatus having a magnetic head which is movable relative to a magnetic recording medium to record or reproduce information. The magnetic head is moved in a direction to approach the magnetic recording medium or in the reverse direction to that direction to periodically alter the amount of projection of the magnetic head toward the magnetic recording medium in synchronism with a cycle of relative movement of the magnetic head to the magnetic recording medium.

Abstract: A rotating drum for use in a magnetic recording system. A magnetic head is mounted on the rotating drum, and a magnetic recording medium is wound on the rotating drum, and the rotating drum is rotated so as to read and write signals. Alternatively, the magnetic recording medium is mounted on the rotating drum, and signals are read and written by a magnetic head fixed exteriorly of the rotating drum. The rotating drum has at least one opening or notch in a magnetic recording medium-winding surface thereof. In order to restrain the deformation of the rotating drum during the rotation thereof, the center of gravity of the drum is disposed substantially in registry with the axis of rotation of the drum.

Abstract: A rotary head device having a rotary drum and a rotating motor within the rotary drum, with the stator of the motor being supported by a fixed arm attached to a fixed drum or to a fixed drum supporting member. The construction permits the manufacture of the rotary head device using the manufacturing equipment used for conventional rotary shaft type rotary head devices despite the rotary head device being a thin device. In this rotary head device the position of contact of a ground brush and a rotor can be set at the center of rotation or thereabouts, so despite it being a thin device, the sliding speed of the ground brush is low, and hence it is possible to prevent the abrasion of the ground brush and also to prevent increase of the rotative driving torque.

Abstract: In a rotary head drum apparatus having a magnetic head attached to a rotary drum member and connected to a coil of a rotor of a rotary transformer so that a signal is transmitted between the magnetic head and a stationary drum member through the rotary transformer, a resilient contactor is mounted on one of the rotary drum member and the rotor of the rotary transformer, and a contact portion is formed on the other of the rotor and the rotary drum member so as to be contacted by the resilient contactor when the rotary drum and the rotary transformer are assembled with each other. The apparatus further includes an aperture bored through an end face of the stationary drum member and a ground contact pin which is flexible in its radial direction is inserted into the aperture for connecting the stationary drum member to ground.

Abstract: A rotary drum magnetic storage apparatus as four magnetic heads fixed above the periphery of the drum. Two of the heads are read heads and the other two heads are write heads. A magnetic tape contacts the periphery of the drum at a specific contact angle. The rotary drum of the magnetic head is of the small type that is less than 30 mm. To avoid overlapping of tracing periods of the heads of the storage apparatus during operation, there is a specific relationship fixed between the write heads, the read heads and the contact angle the magnetic tape makes with the drum.

Abstract: A double-head magnetic transducer assembly for use in a helical scan type tape recorder which comprises first and second magnetic heads secured to a head base so as to be successively arranged in spaced relationship to each other in the direction of transport of a magnetic tape. Each of the first and second magnetic heads has I-shaped and L-shaped core halves which are coupled to each other to form a magnetic gap and the length of the I-shaped core half in the direction of rotation of the transducer assembly is arranged to be above 0.175 millimeters.

Abstract: A magnetic head affixed to the underside of a carrier body mounted at the periphery of a head-wheel for scanning oblique tracks on a magnetic tape is provided with shielding of ferrite, mu-metal or amorphous iron, to reduce magnetic crosstalk. The shielding surrounds the part of the magnetic head that projects beyond the head carrier body except for a small portion near the polished surface that needs to be left uncovered to avoid interfering aerodynamically with the contact of the magnetic head with a magnetic tape. One piece of the shielding is of rectilinear shallow U-shaped profile, forming a pocket for the magnetic head below the carrier body and extends beyond the tip of the carrier body, where the second piece of shielding material completes an annular shielding ring around the end of the magnetic head. This shielding is particularly useful for an after-check playback head used during recording to check on the quality of the recorded signals.

Abstract: A magneto-optic recording system includes a scanning wheel head around which is wound a magneto-optic recording tape in spiral fashion. A first magnetic pole piece surrounds the tape outward of the wheel. A second pole piece extends between an aperture on the wheel opposite the tape to a point proximate the first pole piece and is coupled to source of magnetic flux. A light source is directed from inside the wheel toward the aperture and thus to the tape. The wheel, second pole piece, flux source and light source rotate together relative to the tape to direct a magnetic field to successive points of incidence on the tape.

Abstract: The multi-track head includes more than one head chip attached onto one head base. The head chips are respectively attached onto the divided front end parts of the head base, and the relative positions of the front end parts of the head base are adjusted so that the positions of the gap ends in the head chips are set precisely to a predetermined value, before the head chips are fixed. For these reasons, it is not necessary to adjust the position of each head chip after the head chips are arranged in a rotary cylinder. It is therefore possible to obtain a head having a size which can be accurately adjusted, regardless of the size of the head chip, even when the head chip is extremely small. A bonding material is provided between the divided front end parts to secure the front end parts and the chips mounted thereon in place after they have been displaced to align them with recording medium track locations.

Abstract: Disclosed is a rotary heat type magnetic recording and reproducing apparatus for a digital audio tape player, comprising a rotary drum, head amplifiers, reproducing signal processing circuit and a recording signal processing circuit, the rotary drum including a pair of magnetic heads for recording and reproduction and a pair of magnetic head for reproduction alone.

Abstract: A rotary head device for a recording and reproducing apparatus includes a rotary drum and a stationary drum. The rotary drum has a guide surface formed of a conical surface coaxial with the axis of rotation of the rotary drum and wound with a magnetic tape. A head unit is mounted on the rotary drum to be rotatable integrally therewith. The head unit includes two head elements facing each other, for scanning the tape wound on the guide surface, while the tape is being interposed between the head elements, as the rotary drum rotates.

Abstract: A rotary magnetic head apparatus for use in a VTR and producing a low level of vibration by restraining the unbalance of an overall rotary body of the magnetic head apparatus. The apparatus includes a fixed cylinder for supporting a rotary shaft via bearings, a rotary cylinder secured to one end of the rotary shaft and having magnetic heads, and a motor rotor directly coupled with the other end of the rotary shaft. At least one first balancer and at least one second balancer are respectively provided in the rotary cylinder and the rotor so as to compensate for the unbalance of the rotary body composed of the rotary cylinder, the rotary shaft, and the rotor.

Abstract: A device for driving magnetic tape suitable for running from a pay-out spool to a take-up spool along a determined path during which the tape is wound through a given angle around a stationary element such as a cylindrical drum provided with rotary heads, and is caused to slip over the surface thereof, the device comprising first and second drive elements disposed respectively upstream and downstream from the element, wherein one of the drive elements includes a capstan and wherein the other one of the drive elements includes a wheel having the tape wound thereabout, the wheel being rotated so that its linear speed is greater than the linear speed of the tape and is in the same direction as the linear speed of the tape, and is suitable for enabling the tape to slip over the wheel.

Abstract: To improve the crosstalk behavior of a multi-channel magnetic tape recorder with a rotating head wheel, whose magnetic heads receive signals through a rotating transformer, the leads between the magnetic heads and the corresponding transformer windings are shielded from one another. Advantageously, this shielding is made of small tubes of an efficiently electroconductive metal which, in another embodiment, can be securely connected electrically and mechanically with the rotational axis. For further improvement of the crosstalk characteristics, the shielding can also be connected in an electrically conducting fashion with the short-circuit rings located between the individual transformers.

Abstract: A rotating head wheel for a recorder wherein the head wheel is additionally displaceable in the direction of its axis of rotation. The displacement is produced by mounting the head wheel on a threaded spindle which rotates in the same direction as the head wheel and whose rate of rotation is variable. A first sensor generates a pulse each revolution of the head wheel. A second sensor generates a pulse each revolution of the threaded spindle. The pulses of the first and second sensors and a pulse produced by a position sensor are used for controlling the magnitude of the displacement.

Abstract: In a cylindrical rotary transducer having a stator core cylindrically formed from a high permeability material, a rotary core disposed coaxially with the stator core and cylindrically formed from a high permeability material, and a stator coil and rotor coil disposed respectively on the stator core and the rotary core so as to confront each other; the cylindrical rotary transducer comprises a disk-shaped terminal member mounted on one of the stator and rotary cores, having a plurality of projections radially formed on an outer peripheral edge thereof, and terminals connectd to one of the stator and rotor coils being fastened to the projections; and a supporting element for supporting one of the stator and rotary cores from the other in a rotatable relationship.

Abstract: A magnetic tape unit comprising a head component having a rotatable drum provided with a magnetic head, a guide plate having a tape guide mechanism for leading a magnetic tape into contact with the head component, a supporting base for supporting the head component with the rotation surface of the magnetic head inclined at predetermined angle against the guide plate, the thermal coefficient of expansion thereof being different from that of the guide plate, and mounting means for fitting the supporting base to the guide plate and for absorbing the difference in the degree of expansion and contraction therebetween appeared in a direction in parallel with the surface of the guide plate due to the difference of the thermal coefficient of expansion therebetween.

Abstract: A magnetic-head unit (1) is disclosed which includes a lower and an upper drum (3, 4), between which a rotary head disc (17) is interposed, which disc carries a plurality of magnetic heads (18). The magnetic heads (18) are electrically connected to a transformer comprising a rotary transformer section (8) and a stationary transformer section (10), the stationary transformer section (10) being connected to an amplifier arrangement (16) accommodated in a shielding cover (14, 15). The stationary transformer section (10) is arranged near the upper side of the upper drum (4), a bridge construction (11) being arranged externally of the magnetic-head unit (1) to secure the stationary transformer section (10) to the frame (2) of the magnetic-head unit. The amplifier arrangement (16) is situated inside the shielding cover (14, 15) in the direct proximity of the stationary transformer section (10).

Abstract: The present invention discloses a rotary head type magnetic recording and reproducing device in which a rotary drum is provided with a pair of magnetic heads arranged at an angle of 180.degree. and a further pair of magnetic heads deviated in phase angle from the first mentioned magnetic heads and arranged at an angle of 180.degree. from each other, and a widening angle of a tape in contact with the drum is smaller than the phase angle, one pair of magnetic heads being exclusive for recording while the other pair of magnetic heads being exclusive for reproducing. A gap length of the magnetic head exclusive for reproducing is longer than that of the magnetic head for recording.