Abstract: A magnetic head transducer having enhanced signal output and a manufacturing method therefor are provided. The head is manufactured in such a way that the transducing gap has a uniform width along its entire length. The head is comprised of two confronting ferromagnetic pole pieces intimately bonded together with a transducing gap of approximately 1 micron in width extending from the top to the bottom of the head. The individual pole pieces from which the head is formed have opposing major surfaces, each of which has front and rear gap faces which are joined together to form front and rear portions, respectively, of the transducing gap. A nonmagnetic material is deposited on the front gap faces at a thickness equal to the desired width of the gap. The brazing alloy in then formed on the rear gap faces at a thickness of at least five percent greater than the thickness of the nonmagnetic material.

Abstract: A cassette tape player comprises a reproduction head mounted on a subchassis, and a nonprogram section detection circuit for searching a nonprogram section provided between two adjacent programs recorded on a magnetic tape while the magnetic tape is driven to travel at a fast speed. When a fast forward lever or a fast rewind lever is locked under the condition where a playback lever is locked and the subchassis is held at a predetermined position, a switch mounted on the subchassis is switched on to power supply the nonprogram section detection circuit. That is, the cassette tape player is placed in a nonprogram section detection mode when both the playback lever, and the fast forward lever or the fast rewind lever are locked. Upon detecting the nonprogram section, a plunger is activated to unlock the fast forward lever or the fast rewind lever to return the cassette tape player to a normal playback mode.

Abstract: A device for positioning objects of low mass, particularly magnetic heads over preselected tracks on at least one magnetic disc in a disc file in which there is provided a carriage, displaceable toward and away from the axis of rotation of the magnetic disc, which serves as carrier not only for the magnetic heads but also for the coil of a linear drive means, the said coil being a flat coil which projects into the working air gap of a magnet assembly comprising at least one flat magnet, the flat coil and magnet assembly being arranged in such a way that the force vector lies essentially in the plane in which the carriage is displaceably mounted.

Abstract: A moving head disc file for storage of retrievable informational data with one or more tribit tracks recorded on the disc, the tribit tracks being an integral part of the apparatus, the disc file operating under the supervision of a control system and including a tribit signal decoder whose outputs are logic signals coupled to the system controller, particularly aimed at increasing the number of tracks on a moving head magnetic disc file employing "floppy" or flexible discs.

Abstract: A metallic magnetic head core-holder which supports a plurality of head cores of a multi-track head is provided with at least one slot for improving the crosstalk characteristic of the multi-track head. The slot is located between adjacent head cores, and extends along the entire width of a front wall, which is to abut on a magnetic medium, of the core holder. The slot further extends such that each portion of left and right side walls, which are respectively connected to the front wall, of the core holder is removed.

Abstract: A video disc player for use with a record disc having recorded along a spiral track thereon a succession of information streams to be reproduced and a series of addresses identifying the successive turns of the track. Also recorded on the record disc, prior to the information streams, is an index listing at least the starting addresses of the information streams. An optical pickup assembly reads the record disc by traveling in its radial direction in step with the rotation of the disc. A memory stores the index read from the record disc and, upon actuation of one of information selector switches by the operator, delivers the starting address of the selected information stream to a comparator circuit. During the subsequent process of access to the selected information stream, perhaps with the pickup assembly fed at high speed toward same, the comparator circuit receives another input representing that address on the record disc which corresponds to the position of the pickup assembly relative to the disc.

Abstract: A recording and/or reproduction apparatus for an endless tape which includes a hollow fixed reel, the outer wall of which is wound with an endless tape which is conducted from the innermost portion and wound onto the outermost side a head mechanism for scanning the thus guided tape, a pinch roller and capstan which are driven with the tape held therebetween thereby causing the tape to be slackened downstream of the capstan, a swingable arm which releases the pinch roller from the capstan before its rotation is brought to an end, and a guide pin for releasing the tape from the head mechanism, capstan and pinch roller.

Abstract: A cateye-signal intercept detector for aligning a read-write head above a computer data storage disk. The detector used in conjunction with a standard disk having two adjacent cateye-type head alignment tracks thereon. The subject invention automates the detection of each intercept in the cateye-signal so that associated processing equipment responsive to the output signal produced can measure the read-write head disk alignment automatically.

Abstract: A miniature tape recorder with a two-channel magnetic head and a selecting member for selecting one of combinations of channels for recording and reproducing without releasing a record-actuating member and a reproduction-actuating member, which tape recorder can be used to form an inexpensive study machine by connecting it to an outside study unit for using a two-channel study tape, wherein study step cannot proceed unless a student thoroughly understands the answer to the question of one study step.

Abstract: A helical scan tape recorder having a head support accommodating one or more magnetic heads mounted on a drive spindle. The head support is centered relative to the axis of rotation of the drive spindle by a diaphragm made of a thin elastic sheet material clamped to the head support. A central opening of the diaphragm is pressed over the drive spindle without play, portions of the centering diaphragm being subjected to a limited elastic bending deformation.

Abstract: The present invention relates to a wear-resistant head and a method of producing same. Such a wear-resistant magnetic heads has at least one magnetic-core holder with at least one magnetic core embedded therein. At least that surface of the magnetic core or cores presentable to a recording carrier is composed of a metallic, magnetically-conducting substance deposited by a plasma coating process, or alternatively is of a magnetically non-conducting substance deposited by a plasma coating process, said substance completely surrounding the magnetic core.

Abstract: The movement of the tape is monitored. When the operator recognises during playback of the tape the start position of a tape sequence to be repeated he actuates a start switch upon actuation of which a value corresponding to the monitored tape movement is loaded into a storage or the monitored tape position is assigned to a fixed value. The value is then in any case a read-only value statically stored or assigned. When the operator recognises the end position of the tape sequence he actuates an end switch upon actuation of which a value corresponding to the monitored tape position is loaded into a storage. This value too is then a read-only value statically stored. The two values stored are now compared with the monitored tape movement. Control signals are generated when the stored values match the tape position.

Abstract: A cassette loading and ejecting apparatus effects loading operation under the force of gravity and ejection operation by rotational force of a motor. The apparatus comprises a mechanism for locking a cassette holder interrelatedly with cassette loading motion, and an ejection mechanism for effecting cassette ejection operation including the operation of releasing the lock mechanism. When the cassette has been ejected, the ejection mechanism and the cassette holder are mechanically disconnected to permit cassette loading operation to be effected without applying any force to the ejection mechanism.

Abstract: In an apparatus for automatically maintaining a transducing head assembly on the proper track, which is particularly adapted for a helical scan recording and/or reproducing apparatus capable of providing special motion effects, movable head automatic position acquisition circuit and method is disclosed. The apparatus is of the type which utilizes transverse positioning of the transducing head assembly to accurately follow a track during reproducing, and at the completion of the reproduction from the track, to properly position the head in position to either reproduce the next adjacent successive track, reproduce the same track or reproduce another track so that the appropriate special motion effect is achieved. In the still frame motion mode of operation, the head is normally reset to rescan one or more tracks repetitively by a head tracking servo.

Abstract: A continuous play, selectable airliner passenger audio program presentation system employs a plurality of substantially identical Philips cassette playback units, located in a common housing. Each of the units includes an individual drive mechanism, such that the cassette tape is reversed automatically when it is wound on one hub. Transducer coils in a head assembly are selectively energized, depending upon the direction in which the cassette tape is driven, so that a stereophonic audio signal is continuously derived. The cassette tape tracks and the head assembly coils are activated during recording and playback operations in a manner reversed from the usual manner. Thereby conventional cassettes produce garbled messages, tending to prevent pilfering of the cassettes and use of unauthorized cassettes. The cassettes are held in situ by a hold down bar on a hinged cover of the housing.

Abstract: In a tape scanning device for magnetic tape equipment of the kind used for recording and/or reproducing broad band signals, by designing the head wheel carrying the rotating magnetic heads as a tachometer disc or drum, substantial advantages are obtained when replacement of the head wheel is required due to damage or wear, in particular the avoidance of the need to achieve precise correspondence of the angular positions of the head wheel and tacho disc during reassembly.

Abstract: A head adjusting mechanism is disclosed which comprises a single, head adjusting leaf spring on which forward and reverse heads are alternately projected.

Abstract: An apparatus for recording binary information on a flexible magnetic disk of small dimension, comprises a rotatable hub connected to a plate on a first surface of which is formed a spiral guide. The hub has a cylindrical portion engageable accurately with a corresponding central hole of the disk and it is provided with a radial driving dog engageable on the fly, and with play, with a corresponding radial notch opening out of the central hole. A recording head is mounted at the end of an arm which has an element cooperating with the spiral guide of the plate for being moved, radially with respect to the disk, in synchronism with the rotation of the plate and of the same disk.

Abstract: In a magnetic card recording and/or reproducing apparatus, one edge of a magnetic card having a magnetic track parallel to the one edge is guided by a guiding member. The magnetic card is driven by a magnetic card drive member, and signals are recorded on, and reproduced from the magnetic card by a magnetic head. The magnetic head includes two head cores whose gaps are so arranged as to align with each other. Signals are recorded on the magnetic card by the two head cores, and the recorded signals are reproduced from the magnetic card by the one of the two head cores located at an upper position with respect to the guiding member.

Abstract: In a video tape recorder, a video tape is advanced, at variable speeds other than the normal speed in order to search tape position for editing purpose, by observing the reproduced image on a monitor screen. A speed command signal is supplied to the video tape recorder in the form of a frequency signal. A capstan installed in the video tape recorder carries a frequency generator, and the tape speed is determined by directly comparing a frequency of the command signal with a frequency of a rotation signal obtained from the frequency generator.