Abstract: An apparatus and a method for reducing cross talk in tape recording and playback systems is disclosed. A single magnetic track containing D data bytes of the prior art is divided into W substracks, each containing D/W data bytes. The tape recorder is capable of recording at a preselected full speed and integral fractions thereof. When recording is done at less than full speed, the W subtracks which comprise a track are offset longitudinally, such that the area covered by the W subtracks approximates the area of a single track of the prior art recorded at full speed. To further suppress cross talk, wide write heads and narrow read heads, or opposite azimuth angle heads may be used.

Abstract: A magnetostrictive record and playback head is disclosed which utilizes an acoustic wave traveling along the surface of piezoelectric material so as to distort the surface thereof and to change the stress in a layer of magnetostrictive material along that surface at a point which depends upon the position of the traveling acoustic wave. At the point where the magnetostrictive material is changed, the material is magnetic so that a pulse in an adjacent conductor will cause a flux to form that can deposit a magnetic signal on adjacent magnetic tape.

Abstract: An improved ultrasonic transducer in which signals from portions of the transducer located a distance apart from each other are compensated for the cancellation affects due to a reflected energy striking one part before the other by use of switching circuits which pass either in-phase or out-of-phase components from the portions of the transducer to a summing circuit in such a manner that the summed output is improved.

Abstract: An ultrasonic signal transducer is characterized in that the piezoelectrically active element has a first unitary electrode over the entire surface of one face and a matrix of a plurality of individual electrodes on the opposite face. In the receive mode, such an arrangement effectively constitutes a plurality of individual transducers arranged in the matrix array while maintaining the efficacy of a unitary structure. The signals from the individual electrodes are individually amplified, full-wave rectified, and combined additively to produce a composite signal which eliminates the phase cancellation of the ultrasonic pulses distributed over the face of the transducer assembly.

Abstract: A housing for an acoustic transducer includes means for dispersing internal reflections within the housing to minimize the incidence of such internally reflected acoustic pulses on the transducer itself, thereby avoiding the generation of spurious electrical signals for transmission to the translating circuitry.

Abstract: A solar cell has a heat collector bar with a heat absorbing material in contact therewith. The heat absorbing material includes a transparent web member having a plurality of capsule uniformly distributed therein with each capsules having a suspension of highly reflective, flake-like, field responsive particles therein. The particles may be preoriented with respect to incident electromagnetic radiation.

Abstract: A group of serial-in, parallel-out shift registers has a separate output positionally corresponding to each of the pins of a multipin recording head which is maintained in marking relationship with a moving electrosensitive record sheet. Each of the shift register outputs is connected to the corresponding one of the pins by way of a pin-driving transistor which energizes its pin when a logic zero appears in the corresponding shift register output. A binary number to pin position decoder receives a binary number representing an analog input signal and repeatedly serially shifts corresponding binary bit trains into the shift registers. Due to the time required for an energized pin to mark the sheet, logic zero bits shifted into the registers cause pins to mark the sheet only after those bits are in their final loaded positions in the shift registers at the completion of each shifting operation.

Abstract: An elongatable endless belt passes around four rollers and, in so doing, passes adjacent to the heated surface of a U-shaped platen which has its edges adjacent to two of the rollers. The surface of the belt which faces the platen is in driving engagement with a film coming from a recording means. One of the noted two rollers is driven faster than the other so that the belt moves the film along the platen surface and leaves one edge of the latter at a higher speed than that at which the belt arrives at the other edge of the platen surface. Therefore, the belt progressively elongates and moves along the film as it is moving the latter along the platen surface.

Abstract: A clock signal extraction circuit for extracting a clock signal from a reproduced self-clocking digital recording while masking unwanted data transitions from the extracted clock signal. A plurality of input single-shots are selectively operated to produce control signals having respective durations for controlling the gating of a reproduced self-clocking input signal. The gating of the input signal allows only the clock signal transitions in the input signal to be applied to a clock signal output. The single-shots are selected by a comparator circuit which sequentially compares the time of occurrence of the extracted clock signal to each of a plurality of nominal occurrence times equal in number to the number of input single-shots to be controlled thereby.

Abstract: A capstan drive motor having a integrated motor armature and driving capstan assembly with the capstan being mounted directly in one end of a rotatable center shaft of the motor with the other end of the shaft supporting an armature of the motor. The center shaft is rotatably supported on bearings positioned by adjustable mounts and with one of the bearing mounts having a cantilevered structure for temperature compensation of the shaft and bearing support system.