Abstract: In a moving coil pickup cartridge of a stereophonic type having a magnetic circuit consisting of a permanent magnet, a plate and a yoke, left and right air gaps formed in the magnetic circuit, and left and right pickup coils disposed in the air gaps, respectively, the cartridge including left and right pole pieces formed in the magnetic circuit for providing cone-shape magnetic fluxes on each of the air gaps so as to cross the left and right pickup coils. respectively. Stylus exchanging mechanism is also disclosed.

Abstract: In a cassette and card recording and/or reproducing apparatus; a housing is provided to receive a cassette with a run of the magnetic tape therein being coincident with a recording medium transport path, or to guide a card having a magnetic stripe affixed thereto so as to be disposed in said transport path, a head carriage is movable normal to the transport path and carries a magnetic head engageable with the magnetic tape or stripe in the transport path when the carriage is moved to an operative position, a pinch roller is mounted on the head carriage and cooperates with a rotated capstan for driving either the tape or card therebetween in the transport path upon movement of the carriage to its operative position, a tape guide member is urged to project into the transport path for guiding a tape in such path relative to the head in response to movement of the carriage to its operative position in the cassette mode of operation of the apparatus, and a mode change-over mechanism is selectively actuable for est

Abstract: A pickup cartridge having a cantilever with a stylus on the end and a magnet on the other end, with the magnet supported for pivotal motion and having a first magnetic means comprising a yoke with opposite ends of the first magnetic means mounted adjacent opposite sides of the north pole of the magnet, and a second magnetic means comprising a yoke having opposite ends adjacent opposite sides of the south pole of the magnet, and wherein portions of the first and second magnetic means are magnetically coupled together such that magnetic flux can freely travel between the first and second magnetic means, and wherein a pair of coils are mounted on one of the magnetic means such that the flux through the pickup coils always passes in the same direction.

Abstract: A pickup cartridge having a cantilever, a stylus attached to one end thereof, a permanent magnet, a plate and a pole piece made of magnetic material and coupled to the magnet forming a magnetic circuit, a magnetic gap formed between the plate and pole piece, a diaphragm fixed to the plate, a coil attached to one surface of the diaphragm and disposed in the magnetic gap, and an arm contacting with the other surface of the diaphragm and moving together with the cantilever, in which the coil is displaced in the magnetic gap through the arm and diaphragm in response to displacement of the cantilever to induce a voltage.