Abstract: A switching regulator power supply operates at a high frequency with a low loss, light weight ferrite core transformer. The transformer primary is selectively connected across a DC source of rectified AC power for a predetermined time to provide energy storage followed by a predetermined time period of disconnect to provide energy transfer by way of transformer flyback. The energy storage and energy transfer cycles are initiated by a novel, self-starting timing circuit. The power parameters in at least one of a plurality of secondary windings are sensed and compared with a reference standard. Any error, in the form of a pulse-width-modulated pulse is coupled back to a primary control for adjustment of the energy storage time period. The coupling is done through a sealed opto-electronic coupler, this providing a DC coupling.

Abstract: This universal acoustic coupler system is comprised of a pair of flexible muffs, which are rotatably mounted to permit connection to any length telephone handset receiver/transmitter; this feature also permits any varying angles of the earpiece and mouthpiece. Furthermore, the elastic structure of the muff permits the insertion of any size earpiece and mouthpiece, thereby allowing use of the muffs on an international scale. The muffs are comprised of a pair of elastic, generally circular housings, which include a speaker/microphone cavity and an earpiece/mouthpiece cavity, separated by an acoustic cavity. Features include flexible mounting arms or hinges attached to each of the muff housings. These arms have a circular aperture therein to accommodate a retaining pin which attaches the acoustic muff to an electronic input/output device.

Abstract: A latching circuit is used in a thermal printhead matrix. The heater circuit in each mesa or element of the matrix, once energized by input logic signals, is thereafter independent of changes in the input logic signal levels and remains energized until the supply voltage is removed. This permits turning on the individual mesas in a matrix fashion thereby substantially reducing the number of input leads required to control the matrix.

Abstract: A printing apparatus is provided for printing on a document or bank passbook which has affixed thereto a magnetic stripe on which information with respect to the print operation is written and/or read by a magnetic head scanning assembly. The printing apparatus includes a document holder for accommodating the document to be printed on, and an automatic line positioning device in the form of a stepper motor to move the holder, and accordingly the document, to the line to be printed on as recorded on the magnetic stripe, at which time the platen is advanced against the document, and the data printed on the line by the print head. The magnetic head scanning assembly at beginning-of-stripe position is retracted from the magnetic stripe on the document, and when actuated, advances the head to contact the magnetic stripe to read data on the stripe.

Abstract: The following specification describes apparatus for successively applying magnetic patches on a tape to successive passbooks. Each passbook is moved in sequence to engage a switch and is then stopped. The switch operates a solenoid, which engages a roller with the passbook and disengages the stop. Thereafter, a metered pulse is applied to the motor of a rotary drive to move the passbook and tape through the same distance and one patch is separated from the tape and applied to the passbook by the solenoid engaged roller. As the tape moves under control of the metered pulse, a succeeding patch on the tape is sensed by a photocell to maintain the motor and rotary drive operated. The drive continues to advance the tape and when the succeeding patch is no longer sensed by the photocell, it provides a signal to deenergize the motor and stop the tape. The succeeding patch is thus accurately positioned for application to the next passbook operating the switch.