Abstract: A ceramic electronic component which comprises a generally elongated ceramic body and a metal cap mounted on each end of the ceramic body. Each end of the ceramic body has a peripheral edge rounded to have a predetermined first radius of rounding, and the metal cap has an interior corner rounded to have a predetermined second radius of rounding. The first radius of rounding is greater than the second radius of rounding.

Abstract: A cassette ejection mechanism includes an ejecting plate movably attached to a guide plate and having a pressing element for pressing a magnetic head and a pinch roller, a boosting plate movably attached to the guide plate, and a stop member attached to the guide plate so as to be able to engage the boosting plate to lock the same. After the magnetic head and pinch roller are moved by the pressing element to positions where they do not hinder the movement of a cassette holder, the stop member is pressed by the pressing element to be disengaged from the boosting plate. The boosting plate is urged by an urging element stretched between the ejecting plate and boosting plate to move the cassette holder from its lower position to its upper position.

Abstract: A chloroprene polymer is produced by aqueous emulsion polymerization in the presence of a cyclic polysulfide compound which is employed in a quantity equal to at least 0.1% by weight of the weight of the chloroprene, followed by deflocculating the polymer.

Abstract: In a cassette tape recorder, a base is of a rectangular shape having a transverse length substantially equal to the longitudinal length of a cassette to be inserted. A pair of side walls are attached to opposite longitudinal side edges of the base to face each other, a capstan is located at the transverse center of the base, and a flywheel has a diameter substantially equal to the transverse length of the base. A head lever and a pinch roller lever are elongate and are arranged on the base along the transverse direction thereof and near the capstan. A cassette holder is located between the side walls, on the capstan side of the head lever, so that a substantial part of the holder overlies the flywheel. A solenoid device is mounted on the base on the opposite side of the head lever to the capstan, so that a plunger of the solenoid device may move along the longitudinal direction of the base.

Abstract: In the disclosed device, a counter digitally counts the used or unused length of a tape, a display using a liquid crystal or the like displays the count, and a switch optionally shifts the count up or down.

Abstract: A cassette ejection mechanism comprises an ejecting plate attached movably to a guide plate, a coupling plate rockably attached to the guide plate, the coupling plate having a pin and rocking in response to the slide motion of a sliding member, a toggle spring stretched between the guide plate and the coupling plate to apply an urging force to the coupling plate in rocking motion, and a swinging strip swingably attached to the ejecting plate, the swinging strip having a holding cam to engage the pin of the coupling plate to cause the coupling plate to rock against the urging force of the toggle spring as the ejecting plate moves from a second position to a first position and to be disengaged from the pin after the toggle spring passes its neutral point.

Abstract: A cassette loading/unloading apparatus for a slot-in type cassette tape recorder is provided with a toggle spring and an ejecting spring. The toggle spring is so disposed that a drawing-in stroke is larger than a pushing-in stroke at cassette insertion. The ejecting spring is disposed independently of the sliding stroke of a slider which slides together with a cassette inside a cassette holder at the cassette insertion. A biasing force is charged in the ejecting spring in concert with the ejecting stroke of an ejecting plate at cassette ejection, thereby applying an ejecting force to the slider.

Abstract: A cassette loading/unloading apparatus for a slot-in type cassette tape recorder is provided with a toggle spring and an ejecting spring. The toggle spring biases a slider which slides together with a cassette inside a cassette holder at cassette insertion. The ejecting spring is stretched between the cassette holder and an operating plate slidably attached to the cassette holder, functioning as a return spring for the operating plate. The ejecting spring is charged with a biasing force in concert with and only by the slide of the slider at the cassette insertion, and is disengaged from the slider to be locked to a charged state when the slider passes the neutral point of the toggle spring. The charged biasing force of the ejecting spring is caused to act as an ejecting force on the slider at cassette ejection.

Abstract: Playback, recording, and stop button plates are slidably mounted in parallel on a base plate. When pressed, the recording button plate engages the playback button plate so as to be locked to a recording position. A seesaw lever, which has a lock strip capable of engaging the playback button plate, is located in a plane across the sliding direction of the playback button plate and attached to the front wall of the base plate. An ejecting plate capable of engaging the stop button plate detects the difference between the displacement of the seesaw lever in the playback or recording mode and that in the stop mode. The stop button plate performs a stopping function without engaging the ejecting plate in the playback and recording modes, and engages the ejecting plate to perform cassette ejection in the stop mode.

Abstract: In a cassette loading/unloading apparatus for a slot-in type cassette tape recorder using a toggle spring, a slider holds a cassette inserted therein and slides together therewith in a cassette holder. The cassette loading/unloading apparatus is provided with a spring member separate from the toggle spring. This spring member is charged with a biasing force as the slider slides at cassette insertion so that the charged biasing force may act as a resisting force on the slider. The spring member applies the resisting force to the slider before the slider passes the neutral point of the toggle spring, and is prevented from doing so after the slider passes the neutral point.

Abstract: A tape cassette is provided with a pair of guide rollers for limiting the position of travel in the vertical direction. Holes which serve to determine the position of the tape cassette and into which cassette guides arranged on a chassis of tape recorder can be inserted are formed, respectively, under their corresponding guide rollers. The horizontal distance between the position determining hole and the corresponding guide roller is reduced to a minimum.

Abstract: A cassette holder used for electronic equipments, such as for example a tape recorder, comprises a body of the cassette holder of the slot-in type, a resilient member disposed in the vicinity of the body and having such a toggle action that the resilient member is biased in a large degree toward the cassette insertion when the cassette is loaded, but in a small degree toward the cassette ejection when the cassette is unloaded, and an engaging pin provided to the resilient member and arranged to be engaged with the cassette to be loaded so as to transmit the bias force of the resilient member through the engaging pin to the cassette.

Abstract: This invention is for a tape cassette having window for insertion of a magnetic head and a pinch roller formed extending from a peripheral wall of the housing of the tape cassette to one of the holding plates which holds a pair of reel hubs in place. The device according to this invention has a shutter member, and a resilient metal wire housed in the housing. The shutter member has projections which are to be engaged with an engaging member provided on a tape cassette holder member of the magnetic tape transport apparatus. The metal wire urges the shutter member to close a portion of the window formed in the holding plate. When the cassette is loaded into the loading member, the projections engage with the engaging member and the shutter member releases the closing state of the holding plate forming portion of the window against an urging force of the wire.

Abstract: In a magnetic tape-automatic tracking method, at least one of the positions of the upper and lower edges of a magnetic tape is detected by an assembly of a tape edge position sensor and light-emitting diode. Any displacement of the running magnetic tape from its standard vertical position is determined from detected data. A generally vertical tape edge position-compensating post which applies a tensile force to the magnetic tape in contact therewith is rotated in a vertical plane by a reversible motor in accordance with the detected extent of the displacement of the running magnetic tape from its standard vertical position. The magnitude of a tensile force applied by the tape edge position-compensating post to the magnetic tape is varied, by the extent of the rotation of the reversible motor. As a result, the magnetic tape is vertically moved in the desired direction to regain its standard vertical position.

Abstract: First and second capstans are rotated at respective speeds by first and second motors. The speeds of revolution of the first and second motors are detected as detection signals, and the revolution speed of at least one of the first and second motors is controlled in accordance with a difference between the detection signals. An offset voltage is added to one of the detection signals corresponding to the revolution speeds of the first and second motors for the control of tape tension.

Abstract: A tape cassette according to this invention comprises at least three guide rollers disposed inside the housing of the tape cassette. The at least three guide rollers define a position of the magnetic recording tape of the tape cassette relative to the housing across the thickness thereof while the tape is travelling from one of two reel hubs held by the housing along a path extending adjacent a front wall of the housing, the front wall having openings for the insertion of a magnetic head and a pinch roller.

Abstract: A braking mechanism having a brake band both ends of which are rotatably mounted on a substrate and the central portion of which is bent and connected to a link interlockingly operating with a playback button of a tape recorder. The mechanism further comprises a pair of brake discs which are provided respectively at the tape-feeding side and the take-up side of the tape recorder. The brake discs are each provided with a toothed brake member. The teeth of the brake members are so shaped that one of the brake members cuts into its corresponding brake shoe while the other brake member slipping engages its corresponding brake shoe.

Abstract: A head adjustment mechanism comprises an adjustment screw having two male threaded sections cut in the same direction but at different pitches. The adjustment screw has an upper end portion in screw engagement with the upper portion of the head mount and a lower end portion put in screw engagement with the base member. Thus, with one rotation of the adjustment screw the head supported by the upper portion of the head mount is vertically displaced to an extend corresponding to the difference of the pitches of the two thread sections, so that fine adjustment of the head can be obtained.

Abstract: A lock mechanism for locking a playback button plate to its playback position includes a seesaw lever disposed in a plane across the sliding direction of the playback button plate. The seesaw lever has a lock strip capable of engaging the playback button plate which is coupled with a playback button. When the playback button is pressed to retreat the playback button plate into the playback position, the seesaw lever rocks to have its lock strip engage the playback button plate, thereby locking the playback button plate.

Abstract: A magnetic cassette tape record and play apparatus wherein the magnetic head thereof is fixed, comprises a push member cooperating with an operation button and which is so disposed as to abut against a pad spring received in a tape cassette. When the tape cassette is loaded or ejected in the stop mode, the push member is pressed against the pad spring to deform it against its urging force, thereby locking the cassette tape in a position untouched by the magnetic head. When the operation button is depressed for the recording or reproduction mode, then the push member is removed from the pad spring, thereby causing the pressure pad to be pressed against the magnetic head with the cassette tape disposed between the pressure pad and the magnetic head.