Abstract: A mode setting device for establishing various driving modes in a magnetic tape driving apparatus, comprises a cam member, and a cam guide member guided by the cam member to be shifted between a plurality of positions. And a brake member and a pinch roller are located in positions corresponding to a plurality of magnetic tape driving modes as the cam guide member is shifted between the plurality of positions.

Abstract: A magnetic head adjusting apparatus includes a base, an auxiliary base disposed over the base for supporting a magnetic head, and a first adjusting screw threadably engaged with the base to contact with its end face the surface of the auxiliary base which faces the base. The first adjusting screw moves in a direction perpendicular to the base to move the auxiliary base in the same direction, and engages the auxiliary base to support it so that the auxiliary base can rotate around the first adjusting screw axis. Second and third adjusting screws threadably engage the base at different positions to abut the surface of the auxiliary base which faces the base, and move in the direction perpendicular to the base to move the auxiliary base in the same direction. A rotating member is mounted for rotation relative to the base, and is coupled with the auxiliary base at a position offset from the axis of rotation of the rotating member relative to the base.

Abstract: A reel shaft comprises a substantially cylindrical shaft body to be fitted into a reel hub of a tape cassette for rotating the reel hub. A plurality of elongate projections are formed at regular intervals along the circumferential direction on the outer peripheral surface of the shaft body, and extend at a predetermined angle to the axial direction of the shaft body. The elongate projections on the shaft body engage or mesh with engaging projections of the reel hub to rotate the reel hub, and to push the reel hub in one direction along the axial direction of the reel shaft as the shaft body rotates.

Abstract: A tape guide device which is used in a magnetic tape driving apparatus employing a tape cassette, comprises a tape guide to touch two longitudinal edges of a magnetic tape in the tape cassette, thereby preventing transverse movement of the magnetic tape, when a fast-forward or fast rewinding mode is established in the magnetic tape driving apparatus.

Abstract: A tape transport mechanism includes a supply reel base and a take-up reel base each having a rotary gear and arranged at a given distance apart, a rotatable lever arranged between the reel bases, a rotating gear rotatably supported by the rotatable lever and having its shaft arranged at a position deviated from a line connecting the centers of both reel bases, the rotating gear being slightly meshed with the rotary gear of each reel base under the condition of positioning the rotatable lever at the center of both reel bases, and a drive source for driving the rotating gear in forward and reverse directions.

Abstract: A foot switch includes a lower case made of a synthetic resin and having an engaging bent portion on an integrally formed strip; and a tread plate made of a synthetic resin and having an integrally formed strip with an engaging slit in which the engaging bent portion is inserted. A microswitch is operated when the tread plate is downwardly pressed by a foot.

Abstract: A linking mechanism for a magnetic tape device includes a slide plate moved in association with the operation of a fast tape wind mechanism or re-wind mechanism and a tape eject stop lever which is rotated by the slide plate to such a position as to prohibit a tape eject button from actuating a tape eject mechanism.

Abstract: A magnetic tape drive device comprises winding and rewinding reel pedestals and a changeover lever carrying a pulley and a belt which are driven by a motor. The change-over lever is swung by a plunger through a formed spring, so that the pulley or belt is elastically contacted with one of the pedestals to rotate it.

Abstract: A transcriber i.e., a tape recorder for exclusive use in a sound reproduction comprises a mechanism for permitting a pinch roller and a reproducing magnetic head to be brought to a condition ready for operation by closing a main switch, and a playback switch and a backspace switch both designed to make an on-off operation by a person's foot.