Abstract: A magnetic recording and reproducing apparatus has a supply reel and a take-up reel around which a magnetic tape is to be wound. A first tape guide is provided in the vicinity of a rotary head at the supply reel side and a second tape guide in the vicinity of the rotary head at the take-up reel side. The first and second tape guides are movable in directions of a width of the magnetic tape. A detector detects a height of each of the first and second tape guides. A count value corresponding to the detected height of at least either the first or the second tape guide is obtained by a counter. The height of at least either the first or the second tape guide is adjusted so that the count value becomes equal to a reference value. The count value is set to a specific value when the detected height becomes a reference height corresponding to the reference value after the magnetic tape has been wound around the supply and take-up reels.

Abstract: A magnetic recording and reproducing apparatus includes a tape guide drum (10) composed of a lower stationary drum (10A) supported integrally with a drum shaft (18) and an upper rotary drum (10B), a lead member (12) provided separately from the lower drum and composed of an annular portion (52) having a portion for guiding a reference edge Te of a magnetic tape T and a bottom portion (53). The apparatus further includes pivot means provided inside the drum to support and allow the center axis of the drum to tilt with respect to the annular portion of the tape guide.

Abstract: The magnetic recording/reproducing apparatus of the present invention performs a fast forward reproduction, a fast backward reproduction, a still picture reproduction and the time-lapse recording. To correct for noise-bar the magnetic heads mounted on an upper drum are deviated from intended tracks depending on a difference in tape running speed between a recording operation and a reproducing operation. This is accomplished by tilting the upper drum about a predetermined pivot point with respect to a lower drum having a lead formed thereon. A preferred reproduced image containing no noise-bar is achieved even for a signal recorded in a narrow track pattern in an extended time recording mode, by correcting a slight separation of the magnetic tape from the lead due to a tilt of the upper drum, caused by tilting the lower drum.

Abstract: A magnetic recording and reproducing apparatus with a positioning mechanism for a tape guide drum is provided. The positioning mechanism includes first and second actuators which changes the position of the tape guide drum relative to a direction of travel of a magnetic tape during reproduction for orienting rotary magnetic heads to follow tracks formed on the magnetic tape perfectly if the tracks are curved undesirably. The first actuator is designed to turn the tape guide drum to orient a portion of a rotation plane of the rotary magnetic heads at a tape-entering position where the magnetic tape enters the tape guide drum in a first direction and a portion of the rotation plane at a tape-leaving position where the magnetic tape leaves the tape guide drum in a second direction opposite the first direction. The second actuator is designed to turn the rotation plane of the rotary magnetic head at the tape-entering position and the tape-leaving position in the same direction.

Abstract: A magnetic recording/reproducing apparatus with a drum positioning mechanism is provided. The drum positioning mechanism performs track correction to rotate a tape guide drum about a given axis of rotation according to a travel speed of a magnetic tape to orient a head path of magnetic heads at a given angle relative to a lead member which guides movement of a lower edge of the magnetic tape wrapped about the tape guide drum so that the head path coincides with tracks recorded on the magnetic tape correctly. The drum positioning mechanism also performs lead correction to rotate the lead member through a given angle relative to a drum base to eliminate a shift of the lower edge of the magnetic tape from the lead caused by the track correction so that the lower edge of the magnetic tape follows the lead completely. The magnetic recording/reproducing apparatus may also be employed in a recording mode.

Abstract: The present invention relates to a magnetic recording/reproducing apparatus capable of performing a fast forward reproduction, a fast backward reproduction, a still picture reproduction and the time-lapse recording. The magnetic recording/reproducing apparatus according to the present invention realizes a preferred reproduced image containing no noise-bar, by correcting deviation of magnetic heads mounted on an upper drum from intended tracks depending on a difference in tape running speed between a recording operation and a reproducing operation by tilting the upper drum about a predetermined pivot point with respect to a lower drum having a lead formed thereon.

Abstract: The present invention relates to a magnetic recording/reproducing apparatus capable of performing a fast forward reproduction, a fast backward reproduction, a still picture reproduction and the time-lapse recording. The magnetic recording/reproducing apparatus according to the present invention realizes a preferred reproduced image containing no noise-bar, by correcting deviation of magnetic heads mounted on an upper drum from intended tracks depending on a difference in tape running speed between a recording operation and a reproducing operation by tilting the upper drum about a predetermined pivot point with respect to a lower drum having a lead formed thereon.

Abstract: The present invention relates to a magnetic recording/reproducing apparatus capable of performing a fast forward reproduction, a fast backward reproduction, a still picture reproduction and the time-lapse recording. The magnetic recording/reproducing apparatus according to the present invention realizes a preferred reproduced image containing no noise-bar, by correcting deviation of magnetic heads mounted on an upper drum from intended tracks depending on a difference in tape running speed between a recording operation and a reproducing operation by tilting the upper drum about a predetermined pivot point with respect to a lower drum having a lead formed thereon.

Abstract: A device for detecting the position of a recording/reproducing element, which is provided with two position detecting elements having the same input/output characteristics and a device for generating a difference signal representing the difference between output signals of the two position detecting elements. Further, the outputs of the position detecting elements vary correspondingly to change in position of the recording/reproducing element in such a manner to be complementary to each other.

Abstract: A magnetic head actuator for displacing a magnetic head on a rotary magnetic head drum in a magnetic recording and reproducing apparatus includes a hollow cylindrical yoke housing a permanent magnet and a central pole therein, providing a magnetic circuit having an air gap. A support shaft axially movably extends through the yoke and has opposite ends positioned outside of the yoke. A coil bobbin is attached to the end of the support shaft which is positioned outside of the open end of the yoke. The coil bobbin supports a coil which is axially movably positioned in the air gap. Two parallel resilient suspension support wings are mounted on the yoke and attached respectively to the opposite ends of the support shaft. A magnetic head holder supporting a magnetic head is mounted on the end of the support shaft near the bottom of the yoke.

Abstract: A video signal recording apparatus forms closed loop tracks on a rotary recording medium, and records a video signal amounting to one field on each track so that out of two mutually adjacent tracks making up a track pair, a signal related to an odd (or even) field out of signals which are related to two consecutive fields and constitute a picture is recorded on one track of the track pair and a signal related to an even (or odd) field out of signals which are related to two consecutive fields and constitute a picture is recorded on the other track of the track pair, so that signals amounting to one frame are recorded on the track pair.

Abstract: A video signal recording apparatus uses a crosstalk component reproduced from an adjacent pre-recorded track to control the position of a track which is newly formed when successively forming closed loop tracks on a rotary recording medium, and records a video signal amounting to one field on each track so that out of two mutually adjacent tracks making up a track pair, a signal related to an odd (or even) field out of signals which are related to two consecutive fields and constitute a picture is recorded on one track of the track pair and a signal related to an even (or odd) field out of signals which are related to two consecutive fields and constitute a picture is recorded on the other track of the track pair, so that signals amounting to one frame are recorded on the track pair.

Abstract: A transducer element assembly comprises a transducer element having a scanning surface for scanning a recording surface of a recording medium, a cantilever having the transducer element provided on a free tip end thereof and having a pair of holes provided on a root end thereof, a support part having a pair of generally conical pivots, and a magnetic coupling mechanism provided on the cantilever and on the support part for magnetically coupling the two by a magnetic attraction or repulsion. The cantilever is detachably mounted on the support part and is user replaceable. When the cantilever is mounted on the support part, the pivots engage the corresponding holes and the cantilever is rotatable about the root end thereof in a direction approximately perpendicular to the scanning surface of the transducer element.

Abstract: In apparatus for recording/reproducing a composite video signal on and from a rotary recording medium (1), the field of the composite video signal is detected and only odd or even field signal is delayed by one half (H/2) a horizontal scanning period so that the composite video signal is changed to a modified composite video signal which is recorded on the rotary recording medium (1) together with a field distinguishing signal (Sf) produced using the result of the field detection. The field distinguishing signal (Sf) is arranged to be located at a given time position with respect to a predetermined vertical sync signal of every one frame period of the recording signal on a rotary recording medium (1) driven and rotated at a rotational period equal to the vertical scanning period of the composite video signal.

Abstract: A recording medium is used in a recording and/or reproducing apparatus comprising a rotational motor and a recording and/or reproducing circuit. The recording medium comprises a main body having a substantially cylindrical part, and a hollow part open at least at one end thereof, a recording surface formed at least on a peripheral surface of the cylindrical part, and a coupling part provided at the main body and to be coupled to the motor. The recording medium is loaded into the recording and/or reproducing apparatus in a state where at least a part of the motor is relatively inserted into the hollow part.

Abstract: A magnetic recording and/or reproducing element comprises a main element body, and windings wound around the main element body. The main element body has a pair of extremely thin layers made from a ferromagnetic material, and the extremely thin layers oppose each other at respective edges thereof so as to constitute a gap. Each of the thin layers are sandwiched between a pair of support members which are made from a non-magnetic and abrasion proof material. A contact surface is formed on a vertex part of the main element body, for making contact with a magnetic recording medium so as to record and/or reproduce a signal on and/or from the magnetic recording medium. The main element body has one or a plurality of side surfaces which form a predetermined angle with respect to the contact surface and define the peripheral edge of the contact surface so that the contact surface has a predetermined shape with an extremely small area and has the gap at an approximate center of the predetermined shape.

Abstract: An information storage disc assembly comprises at least one flexible information storage disc having a recording layer on one surface thereof, at least one rigid rotary support plate fixed coaxially to the information storage disc and having a diameter approximately equal to or greater than a diameter of said information storage disc, and one or a plurality of air introducing space or holes provided in a vicinity of centers of the information storage disc and the rotary support plate for introducing air between the other surface of the information storage disc and one surface of the rotary support plate during a high speed rotation of the information storage disc assembly so that an air cushion is generated between the information storage disc and the rotary support plate. The air cushion supports the information storage disc so that the information storage disc will not rotate during the high speed rotation.

Abstract: A recording medium operative with a recording and/or reproducing apparatus comprising a rotational motor and recording and/or reproducing transducer. The recording medium comprises a main body including a flexible recording carrier in the form of a sheet or film, and a support member supporting one end of the main body to maintain a circular shape for the body and being engageable with the motor. The recording carrier has a hollow cylindrical-shape and is provided with an opening at the end remote from the support member. The carrier has a recording surface around its periphery and a hollow interior with a surface which is parallel to the outer peripheral surface. The recording medium is rotated by the motor while maintaining a predetermined minute gap between the main body and a rotation stabilizing member which has a cylindrical surface substantially parallel to the main body.

Abstract: A recording medium is used in a recording and/or reproducing apparatus comprising a rotational motor and a recording and/or reproducing circuit. The recording medium comprises a main body having a substantially cylindrical part, and a hollow part open at least at one end thereof, a recording surface formed at least on a peripheral surface of the cylindrical part, and a coupling part provided at the main body and to be coupled to the motor. The recording medium is loaded into the recording and/or reproducing apparatus in a state where at least a part of the motor is relatively inserted into the hollow part.

Abstract: A recording and/or reproducing apparatus is loaded with a recording medium which comprises a substantially cylindrical part, a hollow part at least open at one end thereof, and a recording surface formed at least on a peripheral surface of the cylindrical part. The apparatus comprises a rotational motor having at least one part thereof relatively inserted within the hollow part of the recording medium which is loaded, to be coupled to the recording medium, a recording and/or reproducing transducer for recording and/or reproducing an information signal onto and/or from the recording surface of the recording medium which is rotated by the motor, and a feeding circuit for feeding the recording and/or reproducing transducer along the recording surface.