Abstract: A motor driven sewing machine comprises pulse generator means for generating a first pulse associated with the first predetermined angular position and a second pulse associated with the second predetermined angular position of the main-shaft of the machine, and state-alternating means for alternatively changing its states between first and second states in response to the first and second pulses. The needle position and cloth feed are controlled in accordance with the states of the state-alternating means.

Abstract: A vector inversion stacked stripline pulse generator adapted for single sch initiation consisting of a relatively long laminated assembly of alternate layers of dielectric and metallization wound on a non-magnetic cylindrical form with the metallization layers interconnected as two separate sets of mutually overlying conductors which are selectively connected together in a spiral around the outer periphery of the cylindrical form, thereby providing a compact pulser which is capable of providing a relatively faster risetime output pulse over conventional designs.

Abstract: A motor heat control circuit is provided for heating an electrical motor during the time of motor shutdown, with the circuit functioning to interconnect a winding of the motor with a source of alternating current voltage for substantially an entire half-cycle of the alternating current voltage but only at intervals comprising a selected plurality of cycles of the alternating current voltage. In its preferred form, the motor heat control circuit is adapted to be connected in shunt circuit with a main motor contactor normally interconnecting the motor winding with the source of alternating current voltage, and includes a controllable semi-conductor switch controlled by digital counting logic which is responsive to clock pulses developed from the alternating current voltage.

Abstract: A pulse generator for the generation of pulses which are synchronously associated with the movement of a mechanical part comprises a toothed element, the teeth of which run past a pick-up head, the pick-up head comprising a first winding fed by a carrier frequency, which produces a field which is modulated by the teeth of the element and a second winding in which a voltage is induced by the modulated field, the induced voltage is supplied to a phase discriminator which produces a pulse sequence having a keying ratio proportional to the relative phase position of the induced voltage and the carrier frequency and the pulse sequence is fed to an integration element which produces a voltage signal proportional to the keying ratio.

Abstract: A pulse-modulated high-frequency transmitter is pulse keyed and has a high pulse power. A self-sustained transistor oscillator has a grounded base with a collector-emitter feedback in the form of a strip line with a length of half a wavelength and a serially-connected capacitor. A pulse modulator connected to the oscillator includes an output stage constructed as a constant current source which is keyed by a pulse generator.

Abstract: A digitally synthesized frequency back-up circuit which, after removal or failure of applied A.C. power, will reproduce signals precisely indicative of each zero transition point of the A.C. waveform. A high frequency binary counter continually counts internally generated pulses and at the end of each A.C. period, stores one-half the count, representing 180.degree. , in a storage buffer. When the A.C. fails, the inverted value of the buffer count is loaded into the counter which is incremented by the internally generated pulses to count only up to the value stored in the buffer, at which point the circuit generates an output pulse. As long as the A.C. frequency remains off, the counter will continue to reload from the buffer and count the value representing this 180.degree. period. An additional and separate buffer section in the circuit stores the binary count representing the 90.degree. point in each A.C. cycle and continuously generates 90.degree.

Abstract: A liquid dielectric radio frequency pulse generator capable of providing high energy pulses having an in-line construction includes an annularly shaped spark gap immersed in an aprotic liquid such as molten sulfur, sulfur monochloride or mixtures thereof. The input voltage is connected to the resonant element through a central aperture provided in the spark gap rings for high efficiency operation.

Abstract: A radio frequency pulse generator capable of providing high energy pulses having an in-line construction includes an annularly shaped spark gap. The input voltage is connected to the resonant element through a central aperture provided in the spark gap rings for high efficiency operation.

Abstract: A tunable frequency pulse generator capable of providing high energy pulses having an in-line construction includes an annularly shaped spark gap and a movable insulator support which includes a conductive sleeve that varies the resonant frequency of the generator. The input voltage is connected to the resonant element through a central aperture provided in the spark gap rings for high efficiency operation.

Abstract: A correction circuit for correcting the frequency of the output pulses produced by a gas flowmeter in dependence on the temperature of the gas comprises a control input for receiving a voltage representative of the difference between the temperature of the gas and a reference temperature. A voltage-controlled oscillator, operative during fixed short periods initiated by each flowmeter pulse, produces auxiliary pulses at a rate dependent on the voltage at the control input, and the auxiliary pulses are counted in a counter. Each time the counter counts a predetermined number of auxiliary pulses, it produces a signal which either blocks one flowmeter pulse or adds an additional pulse to the flowmeter pulses, in dependence on the polarity of the temperature difference.

Abstract: A high power one-shot pulse generator comprised of a pressure chamber, crals sandwiched between electrodes and a spark gap. Pressure exerted on one of the electrodes, acting as a pusher plate, creates a net potential difference across the spark gap which discharges when the potential reaches the breakdown voltage the spark gap has been set for. Pressure is created by initiating a combustible material to produce high pressure gases in the pressure chamber.

Abstract: The invention is concerned with producing interference-free (square) pulses with clean leading and trailing edges, from a pulse generator subject to vibration. This is effected by producing two interference-affected pulse trains of the same frequency but different phase, and applying them to a back-coupled gate circuit the output of which is turned "on" by the first interfering pulse of a first pulse train corresponding in time to an interference-free region of the second pulse train, and stays "on" until the end of the said interference free region, irrespective of any further interference in the first pulse sequence. The action is also repeated in reverse.

Abstract: A clock pulse system for generating and distributing two clock pulse signals which are symmetrical with respect to each other and which are shifted in time. Each of the clock pulse signals are also symmetrical per se. The system comprises a current source which is arranged to be floating with respect to a fixed potential and which can be switched on and off by a pulse source. The system furthermore comprises a delay line whose ends are connected to the current source, and a load, the delay line and the load being actuatable by the current source. The load is symmetrical, and the distribution of the generated clock pulse signals is effected by way of distribution lines which preferably consist of twisted core pairs.

Abstract: A pulse generator for measuring the rotational angle of a shaft has a driven member which is connected to the shaft and is thus movable by the latter and which includes an endless track carrying a plurality of encoded periodic wave signals. A sensor head continuously senses the signal intensity at successive locations along the track as the driven member is moved by the shaft. The sensor head generates an output voltage which characterizes the encoded signals and which is applied to a trigger circuit. The latter generates a signal pulse each time the voltage exceeds a predetermined threshold value.

Abstract: An apparatus for daylight shrimp fishing is disclosed. The apparatus includes a plurality of Otter trawls each having an electrode array and a pulse circuit. Each pulse circuit includes a capacitor which is discharged by a reversal of current to the capacitor which fires an SCR. A control unit located on the boat effects the discharging of the respective capacitors in a predetermined sequence to equalize the load on an alternating current generator. The electrode array has a plurality of electrodes which trail behind a bus extending between the trawl doors at a distance above the bottom. The electrodes are weighted to slide along the bottom and have an insulating material disposed above the conductor so that the electric current pulses are directed into the bottom rather than being dissipated upwardly into the water. The design of the bus and the electrode array is such as to insure uniform current density over the array.

Abstract: This invention concerns improvements in the switching control of power or voltage into a load. Specifically it is concerned with a new time sequencing technique for the switching states of a four-switch configuration for the purpose of producing a three-state, pulse-duration-modulated output having a more ideal waveform and consequently better fidelity in the synthesis of a desired output signal. The new sequencing technique permits pulses of short time duration to be produced without requiring individual switches to recover quickly after having changed states from on to off or from off to on. This results in short pulses being produced with greater accuracy in the length of the pulse and consequently extends the useful dynamic range available at the output.

Abstract: Apparatus including an improved D.C. operated oscillator for an intermediate power source, a cooperating solenoid gas valve opening and safety shut-off circuit, and a spark igniter with automatic shut-down.

Abstract: A portable pulsed signal generator which generates a low-frequency, high-ered signal from a constant direct current, low power source is disclosed as including an inverter for driving a plurality of motors which, in turn, actuate control switches by means of cams and cam followers associated therewith. A potentiometer driven by one of said motors, in turn, effectively controls the output of a direct current amplifier, with the varying direct current output signal therefrom having the alternate half-waves thereof polarity reversed by switch controlled relays, the switch of which is timely actuated by one of the aforesaid cams, cam followers, and other switches, respectively, so as to produce a low-frequency, high-power, substantially alternating current signal. After appropriate transduction said low-frequency, high-power, substantially alternating current signal may be employed for sweeping mines.

Abstract: The present invention discloses a mechanical pushbutton type pulse generating switch for use in a telephone set comprising, in general, pulse generating switch units, a push-break return-make switch unit, and an end pulse generating switch unit. The pulse generating switch unit has a common normally closed contact attached to one side surface of an operating or push-button shaft having a polygonal cross sectional configuration and a plurality of make-break contact groups attached to the remaining side surfaces of the operating shaft and brushes or wipers disposed in opposed relation with and for contact with the common and make-break contacts respectively. The push-break return-make switch unit circuit is connected in series to a parallel circuit consisting of the pulse generating switch unit circuit and the end pulse generating switch unit circuit.

Abstract: A method and apparatus for compressing high intensity current pulses and providing an impedance transformation which increases the magnitude of the current of the pulses. A pulse is injected into a transmission line and after the pulse energy is converted to entirely electrostatic form the transmission line is discharged along the length thereof instead of out the end. The transmission line may be longitudinal, or in the shape of a torus, and the discharging may be either synchronous or asynchronous. The method and apparatus may be useful in compressing deuterium/tritium pellets to the point of nuclear burn.

Abstract: This disclosure relates to the generation of RF pulses, generally in groups of pulses, through the use of a plurality of sequentially discharged power supplies, the successive discharge bursts of which are fed to a plurality of successive cycle-producing pulse generators, also sequentially triggered to generate a predetermined number of cycles of RF pulse for each such burst.

Abstract: The specification discloses a semiconductor magnetic modulator for use with a moving target indicator radar transmitter and which utilizes a plurality charging capacitors for receiving charging current from a direct current power source and discharging in parallel. Silicon controlled rectifiers are connected to each of the charging capacitors and are operable to triggering signals to cause said capacitors to discharge at a predetermined time. A de-Q-ing circuit is connected to each of the charging capacitors in order to sense the voltage level across the capacitors and to dissipate voltage above a predetermined threshold level. The charging capacitors discharge through a hold-off inductor and through a switching transformer to a pulse forming network including a second charging capacitor. Compression occurs in the pulse charging network and a resulting high power modulator pulse is applied from the network to a klystron power tube in a moving target indicator radar transmitter.

Abstract: A pulse generator is disclosed, intended to supply information as to the speed of rotation and the phasing of an internal combustion engine of the injection type, said generator comprising at least a magnetosensitive switching device formed by a magnetoresistive element positioned at a preselected location along a circumference, means for producing a magnetic field for switching said magnetosensitive switching device mechanically connected to the main shaft so as to be rotated at a speed proportional to the speed of rotation of the engine and with a preselected phase relationship with respect thereto, said magnetic field periodically influencing said switching device for a length of time and at a frequency which are a function of the engine speed of rotation and with a phase which is a function of the phase relationship aforementioned.

Abstract: A solid state power controller adapted for use with a single or multiple phase A.C. power source employs, for each phase, oppositely poled directional transistor switches connected in parallel with a load, and parallel oppositely poled directional transistor switches serially connecting the load and a line source phase.Control circuitry is provided for rendering the serial transistor switches selectively operative in a chopping, pulse modulated mode which is variable to effect power control. The load shunting directional switches are alternately enabled responsive to the instantaneous line voltage polarity for transient suppression.

Abstract: A system for igniting, by a spark, the main burner of a gas fired device without the use of a pilot light from, for example, 12 or 24 volts. A unique oscillator provides the spark power and voltage. The oscillator also supplies the power to open the gas valve. A capacitor momentarily opens the valve. The valve is maintained open when a flame is present at the main burner.