摘要:
A direct current motor comprising a field magnet provided with 2n magnetic poles which are magnetized with the same angular intervals as those of the magnetic poles N and S, where n is an integer of 1 or more; a magnetic member for closing the magnetic circuit of the magnetic poles of the field magnet; a plurality of armature coils in such a manner that the angular intervals of the electrically conductive portions thereof, contributing to the generation of torque in the armature coils, are substantially equal to the magnetic pole width of the field magnet; electric power supply control device to which the terminals of the armature coils are connected; short-circuit members for short-circuiting the winding initiation terminals of predetermined armature coils and the winding end terminals of other predetermined armature coils through the electric power supply control device; an armature comprising armature coils in the first series and armature coils in the second series through which the short-circuit members and the plurality of armature coils are connected in parallel to the positive pole and negative pole of a DC power source, the armature positioned so as to face the field magnet; and a rotating shaft for rotatably supporting the armature or the filed magnet, the rotating shaft rotatably supported by bearings disposed on an outer casing of the direct current motor.
摘要:
A direct current motor is provided with a field magnet having l(2m+2n) alternating N and S poles (l and m being positive integers of one or more and n being a positive integer of two or more) that are magnetized within segments of equiangular width about the field magnet, a magnetic-material member for closing the magnetic path of the field magnet, and an armature having l(2n-1) armature windings distributed thereon in a non-superposed manner with respect to each other and in a face-to-face relationship with respect to the field magnet poles, each winding having an angular spacing between those conductor portions thereof that contribute to the generation of the torque that is equal to the angular width of a field magnet pole.
摘要:
An automatic cartridge ejecting apparatus for magnetic tape player is provided. The apparatus comprises an eject lever for ejecting the cartridge from the tape player and an electromagnetic latch device adapted to latch the eject lever in a depressed position. The latch device comprises a movable member operatively connected to the eject lever, a magnet and a ferromagnetic lever pivotally connected to the movable member and being engageable with the magnet when the eject lever is in the depressed position. The ferromagnetic lever is configured to provide a mechanical advantage to the magnet for holding the eject lever in the depressed position.
摘要:
A direct current motor having armature windings which are superposed on each other in double layers. The motor includes a fixed field magnet having 2mn poles (m being a positive integer of 1 or more, n being a positive integer of 2 or more) which are magnetized alternately to N and S polarities in equal angular spaces, a magnetic material member for closing the magnetic path of the field magnet, a rotating shaft supported by bearings provided in the housing of motor, and an armature which is secured to the shaft for rotation in the magnetic path and facing the field magnet poles. A first series of m(2n+1) armature windings are mounted on the armature and are juxtaposed with respect to each other at equal pitches, the angular spacing between the conductor portions, which contribute to generate torque, of the armature winding being equal to the angular width of the field magnet pole. A second series of m(2n+1) armature windings are also mounted on the armature and are juxtaposed with respect to each other at equal pitches, the angular spacing between the conductor portions, which contribute to generate torque, of the armature winding of the second series also being equal to the angular width of the field magnet pole. The first series of the m(2n+1) armature windings and the second series of the m(2n+1) armature windings are superposed on each other and are disposed, with respect to each other, out of phase by 1/(2n-1) of the angular width of the field magnet pole.
摘要:
A battery operated, capacitor discharge type electronic, photoflash system having an electro-mechanical switching means for automatically disconnecting the battery to minimize unnecessary discharge of the battery. The system causes the battery to be disconnected at a predetermined time interval after a charge cycle has been started for a discharged main capacitor or after the main capacitor has been fully charged for a predetermined period of time.
摘要:
A tape player utilizing a plurality of endless magnetic tape cartridges, comprising a rotatable container accommodating the plurality of endless magnetic tape cartridges, a container latch means for arresting rotation of the container to position the cartridge to be played in a predetermined position, a swingable reciprocating deck provided with a capstan and a reproducing member for playing the cartridge held in the playing position such as a magnetic head or the like, a deck latch means for retaining the reciprocating deck at a position where the cartridge in the playing position is played, a tension spring for moving the reciprocating deck which has been released from the deck latch means to the direction away from the cartridge, a deck moving means moving the cartridge to a position where it is played by rotation of the capstan against the bias of the tension spring, and a means for positioning another cartridge in the playing position by rotation of the capstan while the deck is being moved by the deck moving means to a position where the cartridge is played whereby the cartridge is suitably played by controlling rotation of the container and movement of the reciprocating deck.
摘要:
A magnetic tape recording and reproducing apparatus which comprises an endless magnetic tape of little re-cycle time, a driving means for the tape, a recording and reproducing circuit with a magnetic head for recording and reproducing the tape, a rotary cam for vertically moving the magnetic head transversely of the tape, a first cam driving means for continuously rotating the cam as the tape is transported, and a second cam driving means for steppedly rotating the cam in the direction opposite to the direction that the cam is rotated by the first cam driving means, and wherein a spiral recording track is continuously formed, the magnetic head being intermittently moved as the cam is rotated by the second driving means thereby reproducing the recorded information upon returning back for the period multiple of integral number of the re-cycle time of the tape.
摘要:
A tape player for playing a plurality of magnetic tape cartridges comprises a compartment adapted to vertically and horizontally receive a plurality of the magnetic tape cartridges, a deck provided with a reproduction means including a tape driving device for drivingly feeding the tape in the cartridge and at least one magnetic head adapted to transduce the tape, a horizontally movable mechanism for horizontally moving the deck, a laterally movable mechanism for laterally moving the deck, a lock for selectively locking the deck in the position where one cartridge is to be played, a shifting mechanism for moving the cartridge opposite to the deck retained by the lock means from the compartment toward the deck and for returnedly moving the cartridge from the playing position to the original position in the compartment, and an index mechanism for designating the cartridge to be played.
摘要:
A tape cartridge shifting apparatus for an endless magnetic tape cartridge player, comprising lever means movably provided on a deck in the player housing and engageable with the front edge of the tape cartridge located in the playing position, lever driving means for moving the lever means, an electromagnetic device for actuating operation of the lever driving means, and a control circuit energizing the electromagnetic device in relation to detection of an end mark of conductive foil provided on the tape or the nonrecorded zone between the recorded zones on the tape. The tape cartridge is shifted from the playing position to the nonplaying position by movement of the lever means by means of the lever driving means.
摘要:
An endless magnetic tape playing time indicating apparatus for an endless magnetic tape player is provided with pointer means rectilinearly moved by rotatable force of a rotary drive capstan for driving the tape, and indicator means including scale means corresponding to the pointer means. Provided between the pointer means and the rotary capstan are a speed reducing device decelerating rotation of the capstan, drum means rotatably driven through the speed reducing device by the capstan, and a flexible stringy member taken up by the drum means with rotation of the capstan, the pointer means being rectilinearly moved when the flexible stringy member is wound on the drum means. The flexible stringy member is drawn from the drum means whenever the magnetic tape completes one cycle to thus return the pointer means to its starting position.