Abstract: A formable reusable enclosure is disclosed for use as a container wrap, a mailing tube, or the like. One specific embodiment of the enclosure comprises a pliable, elongated, substantially rectangular panel member having opposing ends and a tongue portion extending from one of the opposed ends. The panel member has an outer layer of bendable kraft board and an inner layer of corrugated paper adhered to the kraft board. The panel member is adapted to be formed into an enclosure by bending the panel member into the configuration of the peripheral wall of a container with the tongue portion overlapping the opposing end of the panel member. A slot is formed through the panel member adjacent to the end which is opposite to the tongue portion end. The slot has an engagement edge aligned parallel to the corrugations in the inner paper layer, enabling adjustment of the size of the enclosure by selecting a desired corrugation for engagement with the slot edge.

Abstract: A magnetic recording system transmits data edge information and clock signals through a rotary transformer. From the signals derived from secondary side of the transformer the data is reconstructed from the edge information and retimed using the clock signals. A record amplifier is D.C. coupled to a recording head for good pulse response. The amplifier can be a differential one with a pulsed current source for still better pulse edge response.

Abstract: A protection circuit inhibits the generation of a write-erase signal to an E.sup.2 PROM when the logic supply voltage falls below a predetermined threshold level. A differential-input amplifier compares the logic supply voltage with a fixed potential and when the logic voltage drops below the threshold, a transistor coupled to the write-erase signal generator switches to its conductive state inhibiting further occurrences of the signal.

Abstract: A one-shot generator generates a fixed-width pulse in response to an input signal. The pulse is applied to a delay line and the leading edge of the signal energing from that delay line generates a control signal pulse which terminates the fixed-width pulse and primes the one-shot for an immediate subsequent occurrence of the input signal to generate a second fixed-width pulse.