Abstract: A tape speed control system for a multiple speed tape recording and reproducing apparatus comprising a transducer head for reproducing a tape speed indicative signal which has been recorded along an edge of a recording tape. The frequency of the reproduced speed indicative signal is compared with a plurality of reference values to determine to which one of separate frequency bands the frequency of the reproduced speed signal belongs. If the latter belongs to the frequency band other than the frequency band which includes a predetermined frequency derived when the playback speed equals to the recording speed, a corresponding motor drive signal is generated to vary the speed of the tape until the frequency of the reproduced speed signal reaches the predetermined frequency.

Abstract: The magnetic tape device includes a supply reel which has a wound tape therein. The device further includes a pair of pulleys. The axis of the first pulley is, at the same level, in parallel to the axis of said supply reel. The axis of the second pulley is not inclined to a rightangle to the direction of the tape length but is at a twisted position against the position which is in parallel to the axis of the first pulley. Therefore, the tape is twisted when it travels "between" said pulleys. The device also includes a take-up reel, the axis of which is, at the same level, in parallel to the axis of said second pulley. The supply reel and the take-up reel are not supported with one common double shaft but are supported with their own strong shaft at their own places. The device, of course, has other means which ordinary magnetic tape devices have.

Abstract: Device for the programmed control of the operative sequences for a cassette-type tape recorder having a tape transport mechanism moved by a motor and a support for the magnetic heads and for the pressure roller, which device comprises: a shaft which can be rotatably moved in a predetermined direction by a wheelwork connected to said motor; a spring which tends to cause the rotation of said shaft in the opposite direction; first, second, third and fourth control means disposed on said shaft; means of introduction and expulsion of the cassette sensible to said first control means; means for lowering and for raising the cassette sensible to said second control means; approach and removal means to and from the cassette of the support for the magnetic heads and the pressure roller, sensible to said third control means; and engagement and disengagement means for the wheelwork, sensible to said fourth control means.

Abstract: A head positioning transducer is disclosed for use with a rotating drum assembly for scanning a magnetic tape along a plurality of adjacent helically positioned record tracks, wherein the transducer includes a permanent magnet field assembly and a drive coil positioned adjacent thereto mounted on a cantilevered beam, at one end of which a playback head is mounted, such that a drive current supplied to the coil produces a field which interacts with the field of the magnet, causing a force on the coil and beam, resulting in controlled movement of the head transverse to the record tracks.

Abstract: A tape transport control system for monitoring the amount of tape on a tape reel using a first transducer means to provide a signal representative of the rotational speed of the tape reel. A fixed frequency oscillator is arranged to provide signals to be counted by a programmable variable modulo counter. The counter is programmed to start a countdown at a count preset by a digital word applied from a speed control selector for the tape transport. An output signal from the counter indicative of a fully decremented count status is applied to a two input AND gate which has as a second input signal an output signal from the reel transducer. An output signal from the AND gate is applied to the speed control selector to produce an interruption of an energizing signal to a capstan motor drive.

Abstract: A mounting base to support and position a magnetic tape cassette on the chassis of a video tape recorder consists of a generally rectangular plate in which the supports for the cassette consist of marginal portions of the plate which are partially severed from the remainder of the plate and upwardly bent to contact the bottom of the cassette. The cassette is of the type in which the tape is carried by a pair of spools, and has an upwardly tiltable lid along one side to allow the tape to be withdrawn from operation. The cassette is first received in a mounting case which is vertically tiltably mounted on the recorder chassis. Spaces are provided in the base for the driving reels and the tape withdrawal mechanism of the recorder and when the case moves the cassette downwardly, the upwardly bent portions of the base plate flip open the lid and also properly level the cassette.

Abstract: Disclosed is a self-compensating device for a magnetic disc apparatus with a velocity servo system in which an output signal of a velocity detector detects the velocity of a read/write transducer is automatically compensated by the combination of a control means and a compensator. While supplying a given velocity command signal to the velocity servo system, the control means measures the velocity of the transducer by using a track detector and adjusts the compensator on the basis of the result of the measurement.

Abstract: An improved disk file is disclosed including a number of like transducer/actuator arrays disposed about a common disk (stack) and adapted, on the one hand, to allocate track coverage while, on the other hand, also providing (optional) a "back up" track coverage capability--whereby each actuator array is assigned a different track set (set of adjacent tracks in the file) as its "primary responsibility", also being assigned a back-up coverage responsibility over another adjacent track set as its "secondary" responsibility--this overall arrangement resulting in such benefits as "multiple paths to data".

Abstract: A dual lock mechanism for a magnetic disc drive whereby rotation of the disc spindle and translation of the carriage assembly can be prevented. A first lock arm is pivotally mounted whereby one end can engage the spindle drive motor. A connector link is operated in response to rotation of the first lock arm and pivots a second lock arm within the housing into engagement with the carriage assembly.

Abstract: Disclosed is a novel rigid flying head supported on a prescribed foil to present a "compound-foil" face to a passing flexible record segment, the segment being thus induced to automatically assume a prescribed, relatively controlled "approach zone" and associated constant spacing relative to the head face.

Abstract: A tape recorder has an automatic repeating function, and includes a switching lever (435) displaceable between a first position to render a rewinding mechanism operable and a reproduction driving mechanism inoperable, and a second position to render said fast feeding mechanism inoperable and said reproduction driving mechanism operable, a rotary body (281) for operably connecting with said switching lever so as to perform said displacement of the switching lever by its torque and to rotate independently of the tape travel, and an automatic stop detection mechanism (39) for detecting the end of a tape so as to displace the switching lever from the second position to the first position.

Abstract: A tape recorder wherein one end of a tape FF lever is engaged with a pinch roller-supporting board when the tape FF lever is rotated for the fast forward (FF) or rewind (REW) run of a cassette tape to effect the rotation of the pinch roller-supporting board, thereby retracting a pinch roller to a position where the pinch roller does not contact a tape surface; and, where the FF or REW run of the cassette tape is brought to an end, an automatic reverse plunger is driven for the rotation of the pinch roller-supporting board to disengage the pinch roller-supporting board from the tape FF lever, thereby releasing the FF or REW lock.

Abstract: A tachometer for generating a velocity signal in a data disc pack servo system comprising a sampling pulse generator for producing pulses that are spaced from one another by a constant amount representative of a distance increment of radial movement of a servo head in the system, a timer for measuring the time between the sampling pulses, the timer including a clock pulse source and a counter which is started by one sampling pulse and reset by the next succeeding sampling pulse so that the digital output thereof is proportional to time and a computer for computing average velocity by deriving the quotient of the distance increment divided by the time required for the servo head to traverse such distance increment.

Abstract: A combination filter system for an enclosed disc drive in which a breather filter is provided in a central position in the disc drive cover and a recirculating air filter is concentrically positioned about the breather filter. The recirculating filter includes an annular air deflector whereby air flowing from the periphery of the disc housing is filtered and directed towards the spindle, which is positioned in the central opening of the annular air deflector, thereby establishing continuous flow of filtered air within the housing.

Abstract: A tape recorder comprises a tape run stop detection lever and a spring. The lever is provided with a detection pin which is urged in one direction by a rotation of a right side reel rest to be engaged with a cam idler. When the detection pin is engaged with the cam idler at the stop of the right side reel rest, the lever is moved in one direction by the engagement between the cam idler and detection pin. The spring produces at the movement of the lever an urging force acting in the direction opposite to said one direction. The lever is moved in the direction by the engagement between the cam idler and detection pin to detect the stop of the tape run. The cam idler is temporarily prevented from being coupled to an idler section of a flywheel and is rotated by the spring in the direction opposite to said one direction to release the engagement.

Abstract: A tape transport is disclosed and claimed for moving recorded tape that contains both recorded sections and non-recorded sections between a loaded reel and a takeup reel. The transport is adapted for both the normal play, fast forward, and rewind modes and for an additional two modes, detecting fast forward and detecting rewind, in which the tape moves in fast forward or rewind through a recorded section until a non-recorded section is detected, at which point the transport automatically shifts to the play mode. A selector for choosing the desired mode can be operated by a single control lever. Or a first control for choice between play, fast forward, and detecting fast forward, and a second control for choice between play, rewind, and detecting rewind can be provided.

Abstract: In a data processing device using flexible magnetic disc media, apparatus is disclosed for improved positioning of a magnetic read/record head against the recording surface of a magnetic disc. A carriage, moveable radially on the disc, has two opposed swing arms pivotal between a load position and a retracted position. A gimbal spring is cantilevered to each swing arm and carries at its free end a transducer. A retainer is attached to the end of each swing arm. During movement of the swing arm toward the load position, each retainer is engaged with its associated gimbal spring and maintains its associated head in a controlled attitude as the head approaches the disc. In the load position, the heads are opposite one another against recording surfaces on opposite sides of the disc, and each is free of its associated retainer.

Abstract: A magnetic head slider assembly comprising a body supporting at least one transducer for reading and/or recording the information contained in a data carrier. At least a part of the surface of the body which faces the data carrier is constituted by an extremely thin lubricating monomolecular layer with polar termination. The thickness of the layer is such that the ratio of the thickness to the flight height of the surface or height of the body is less than a thousandth.

Abstract: Improved disk drive equipment is illustrated, being characterized by improved partitioning means for partitioning a pack of flexible magnetic recording disks, the partitioning means featuring "pneumatic commutator" means for distributing air streams to various inter-disk gaps in the pack--this commutator means constituting part of an external, rotationally stabilized jet-select apparatus.

Abstract: A cassette loading and unloading mechanism for a video tape recorder comprises an eject bar supported for movement between upwardly biased and depressed positions and positioned frontwardly of a cassette holder with its longitudinal extend extending in parallel to the top of the video tape recorder. The cassette holder is held at a set position and an eject position when the eject bar is in the upwardly biased position and in the depressed position, respectively. The eject bar is locked in the depressed position during the positioning of the cassette holder at the eject position so that a relatively large access opening can be available for the insertion and removal of the tape cassette into and from the cassette holder.