Abstract: A low-cost, two-axis rate and acceleration sensor utilizing piezoelectric generator elements affixed to a rotating structure and generating a periodic signal having an amplitude representing the rates and accelerations. A demodulator dividing the period of the signal into a plurality of segments and regenerating selected ones of the signal segments in accordance with a predetermined pattern stored in a fixed store, the regenerated signal segments being filtered to produce rate and acceleration analog voltages.

Abstract: A low-cost, two-axis rate and acceleration sensor utilizing piezoelectric generator elements affixed to the rotating housing of an inside-out synchronous motor. Signals generated by the piezoelectric bender elements are amplified, compensated, balanced, and converted to FM signals for transmission off the rotating assembly.

Abstract: In a system of rack-and-panel mounted electronic units an improved electrical connector having unitary, injection-molded plastic connector body elements; reconfigurable connector keying hardware assembled coaxially with and held in place by fasteners used to attach the connector elements to structural members.

Abstract: A synchro system having a microprocessor control element emulating a synchro transmitter. Current sensing circuits measure current developed in a synchro receiver responsive to drive signals generated by the microprocessor control element; the microprocessor control element alters the drive signals to maintain control of current dissipated in the synchro receiver within predetermined limits.

Abstract: An inside-out hysteresis synchronous motor for use with inertial sensors and having a hysteresis ring magnetically isolated from the motor structure while maintaining the thermal expansion loop of the motor structure.

Abstract: A mixer-driver circuit in a code correlator of a spread-spectrum communications system simultaneously multiplies an input RF signal with two phase-offset digitally encoded bit streams. A double-balanced mixer is driven with the difference of the digital signals; the mixer is either inverting, noninverting, or off. Matched ECL bistables which reclock the phase-offset bit streams, and a load current steering circuit coupled to the bistables together provide a balanced, differential drive current to the mixer which switches state faster than the bistables alone. In another embodiment, a single bistable receiving an encoded bit stream differentially drives the mixer in a biphase circuit.

Abstract: A low-cost, two-axis acceleration sensor utilizing piezoelectric generator elements affixed to the rotating housing of an inside-out synchronous motor. Signals generated by the piezoelectric bender elements are amplified, compensated, balanced, and converted to FM signals for transmission off the rotating assembly.

Abstract: An electronic time-of-day clock having a low-power time source and compensation circuits selectively operable responsive to pulses output from the low-power time source when system primary power is off or disabled, and responsive to a relatively highly accurate time-pulse generator when primary power is enabled. The time-of-day clock compensates continuously in real-time for errors in the output of the low-power time source caused by variations in the ambient temperature of the device; when primary power is enabled, the output of the low-power time source is further compensated by comparing the output thereof with the output of the high-accuracy frequency standard and storing accumulated error.

Abstract: A low-cost two-axis rate and acceleration sensor utilizing piezoelectric generator elements affixed to the rotating housing of an inside-out synchronous motor. Signals generated by the piezoelectric bender elements are amplifier, compensated, balanced, and converted to FM signals for transmission off the rotating assembly.

Abstract: A piezoceramic bender element for operation in the AC generator mode below the device resonant frequency and having an electrode configuration which removes from the active electrical circuit the ends of the element where relatively high levels of mechanical stress develop.

Abstract: A mixer-driver circuit in a code correlator of a spread-spectrum communications system simultaneously multiplies an input RF signal with two phase-offset digitally encoded bit streams. A double-balanced mixer is driven with the difference of the digital signals; the mixer is either inverting, noninverting, or off. Matched ECL bistables which reclock the phase-offset bit streams, and a load current steering circuit coupled to the bistables together provide a balanced, differential drive current to the mixer which switches state faster than the bistables alone. In another embodiment, a single bistable receiving an encoded bit stream differentially drives the mixer in a biphase circuit.

Abstract: Compartmented EMI shielding structures formed integrally with a printed circuit board having a ground-plane element. An elongated strip of metal having means facilitating manual assembly including grooves or channels for controlled bending of the metal is first defined by chemical etching and then formed by bending under finger pressure into wall elements of a compartmented EMI shield.

Abstract: A digital display updated by inputs from a manual control having a plurality of tactile detents. A counter is loaded with a predetermined number and then decremented at a fixed rate until the number reaches one. The fixed rate is either the program cycle time of a microprocessor embodiment or the clock time of a circuit embodiment. Whenever a detent of the control is detected, the then current value of the counter is added to or subtracted from the display and the counter is again loaded with the predetermined number.

Abstract: In an autothrottle system for multiengine aircraft having separate throttle servos for each engine and servo tracking means for detecting and compensating for servo drift during autothrottle mode of operation, a pressure sensitive switch on each throttle handle for temporarily disengaging the autothrottle system and establishing a new reference for servo tracking means in response to manual adjustment of throttles by the pilot.

Abstract: A throttle servo for each engine of a multiengine aircraft and servo tracking means for detecting and compensating for servo drift during autothrottle mode of operation.

Abstract: A reefer scoop having a plurality of teeth for scraping the icy encrustation from corrugated surfaces such as those commonly found in refrigerated trucks, trailers and containers; the teeth are universally adjustable to accommodate a variety of corrugation spacings, and the scoop is quickly and easily converted by means of rotating the blade for use as a conventional shovel.

Abstract: An R-F coupling device of greatly improved coupling and shielding characteristics is disclosed for inductive connection to the antenna circuitry of a hand-held transceiver without necessitating the removal of the transceiver antenna.

Abstract: A data recording and retrieval system wherein a beam of coherent radiation is optically formed into an intense spot and deflected by first and second deflecting means to impinge upon a storage medium. The beam is spot-focused by a lens system which includes a multiple lens array, and selectively deflected by a pair of mirrors through a particular lenslet of the multiple-lens array to one of a plurality of storage fields of the recording medium. When the storage field is selected, a second deflection system produces a randomly selectable X-Y deflection of the beam, within the area of the preselected storage field. The multiple lens array provides a plurality of lenslets, each lenslet of the array corresponding with a different one of the plurality of storage fields within a storage area of the recording medium.

Abstract: Apparatus for generating self-clocking data of a predetermind format simulating control information recorded on a dynamic magnetic medium storage device. The data generator includes means for simulating servo clock signals and encoding means for producing formatted data signals having jitter and phase relationship to the servo signals which are worst-case rather than random. The apparatus is utilized to test data recovery circuits independently of the storage device.

Abstract: Apparatus and method for the uniform dipensing of a conductive epoxy binder in hybrid microcircuit applications. A method is disclosed of uniformly pressurizing a conductive epoxy binder through a small orifice until a droplet of fixed volume forms, setting a predetermined gap size between a contact pad and the droplet in order to control the shape and size of the epoxy droplet left on the pad as the droplet touches it, and then releasing the pressure while reciprocating the dispenser from the pad. Also, apparatus, including a cylindrical limiting means attached to the dispenser tip, is disclosed for ensuring the gap size is constant. Other embodiments of the limiting means provide for the use of a relieved section which assists in preventing contamination and for adjusting means operable to vary the gap size.