Abstract: A magnetic head assembly comprises a magnetic head, a magnetic head support structure having a first mount, a second mount and a housing space, and an optical unit fixed to the second mount, capable of projecting a plurality of light beams through a light passage on a recording medium and of receiving a plurality of reflected light beam. The optical unit comprises a light emitting device which emits a light beam, a holographic unit capable of producing a plurality of light beams from the light beam and of focusing the plurality of light beams on a position sensing track formed on the recording medium, and a photodetection device for receiving the plurality of reflected light beams. The holographic unit is partly received in the housing space.

Abstract: A magnetic head device is disclosed, including a magnetic circuit having a head core unit, a back core and a coil. The head core unit includes a first core made from a magnetic material and a second core made from a magnetic material. A magnetic gap is formed between the first core and the second core. The back core is made from a magnetic material and is joined to the first core and the second core to form back gaps between the back core and vertical portions of the first and second cores, and the coil is mounted on the first core. The device includes a first holder which is bonded to the first and second cores at two locations, one on the side of the magnetic gap and one on the side of the back gaps, to hold the magnetic circuit. The device further includes a second holder which is bonded to the first and second cores at the magnetic gap side to hold the magnetic circuit, the second holder being substantially in the shape of a rectangular beam.

Abstract: A magnetic head device comprising:a magnetic circuit which includes a head core unit, a back core and a coil;the head core unit including a first core made from a magnetic material and a second core made from a magnetic material, and forming a magnetic gap between the first core and the second core;the back core made from a magnetic material and jointed to the first core and the second core so as to form back gaps;the coil arranged on the first core;a first holder which is bonded to the first core and the second core at two locations of the side of the magnetic gap and the side of the back gaps so as to hold the magnetic circuit; anda second holder which is bonded to the first core and the second core at the magnetic gap side so as to hold the magnetic circuit, and which is substantially of a square pillar.

Abstract: In a magnetic head comprising a read/write head and an erase head constructionally integrated with each other, the closed magnetic circuit of the erase head is arranged to be higher in magnetic reluctance than the closed magnetic circuit of the read/write head, whereby a magnetic flux to be drawn by the erase gap is reduced so as to prevent the leakage of the magnetic flux to the read/write head side.

Abstract: Crosstalk prevention means or short-circuit means is connected in parallel to an erasing coil for erasing part of data prior to recording the data by a read/write coil, whereby a cancelling magnetic flux for erasing a crosstalk magnetic flux is generated to improved an S/N ratio.

Abstract: A magnetic head includes a head core having a top surface with a magnetic gap for contact with a magnetic record medium and a pair of sections of a laminar slider bonded onto the top of the head core such that their top surface is flush with the core top surface to form a slider surface, thereby eliminating any sliders which have been bonded to sides of the head core.

Abstract: An electrical connector having terminals disposed in a body, which terminals have terminations in one face disposed in two rows and in columns and the terminals have tail portions which protrude from the other face with the terminal ends thereof disposed in a single row and the terminals are disposed to form mirror images about a plane perpendicular to the rows and through a midpoint between terminals to reduce possible crosstalk.

Abstract: Making a branch connection with a flat cable and affording shielding is afforded by removing insulation at three longitudinally spaced locations transversely of the cable, folding the cable at the intermediate location, making connection to the signal leads at the intermediate location, cutting ground leads, folding ground leads at other two locations, and joining a portion of a conductive member to the ground leads on each side of the cable and by straps at the fold joining the portions of the conductive member affording ground contacts.