Abstract: Power control for a radar system issues power draw commands to each array in the radar system. Each power draw command controls direct current (DC) power draw by the respective radar array on a dwell-by-dwell basis, based on total energy resources (including stored energy) available to the respective array at the start of a dwell period, a power spend rate expected for the respective array during the dwell period, and a rate of “waste” power set to be dispersed to reduce excess power at the respective array during the dwell period. In determining power draw for an array, the power control takes into account a predetermined number of future dwell periods and any transmit and/or receive tasks scheduled for such periods. If necessary to maintain less than a predetermined ripple on total DC power drawn from a source of the DC power by the radar system, the power control adjusts a duration of empty dwell periods within the dwell schedule for one or more of the arrays.

Abstract: Conductive segments (transmission line conductors) are positioned within a transmission line structure in order to generate multi-cycle microwave pulses. The conductor segments are switchably coupled to one or the other conductor of the transmission lines, inside the transmission line structure. Microwave pulses may be induced in the transmission line by closing the switches in a controlled manner to discharge successive segments, or successive groups of segments, into the transmission lines. The induced pulses travel uninterrupted along the transmission lines in a desired direction to the load. Efficiency of systems and energy delivered to the load in multi-section transmission lines is increased and/or maximized by adjusting the ratio of characteristic impedances associated with the transmission line conductor segments according to an optimum ratio.

Abstract: Conductive segments (transmission line conductors) are positioned within a transmission line structure in order to generate multi-cycle microwave pulses. The conductor segments are switchably coupled to one or the other conductor of the transmission lines, inside the transmission line structure. Microwave pulses may be induced in the transmission line by closing the switches in a controlled manner to discharge successive segments, or successive groups of segments, into the transmission lines. The induced pulses travel uninterrupted along the transmission lines in a desired direction to the load. Efficiency of systems and energy delivered to the load in multi-section transmission lines is increased and/or maximized by adjusting the ratio of characteristic impedances associated with the transmission line conductor segments according to an optimum ratio.

Abstract: According to the invention, a controlled or synchronous switching of an electrical power breaker (1) can be guaranteed by means of predicting a future voltage and/or current curve from actual voltage and/or current data in an electrical energy network (5). The prediction of the future voltage and/or current curve is carried out using the voltage and/or current data determined in the electrical network (5) at different timepoints by application of a Prony method to the available voltage and/or current data.

Abstract: An electrical load power control device is described that reduces the power consumption of inductive and inductive-dissipative loads, including for example fluorescent lighting. The power circuit of the invention interrupts AC power supply to the load during a plurality of intervals within each half cycle of the AC mains signal frequency whilst providing an alternate path for current flow during the interruption to maintain a sinusoidal-like current to the load. During a crossover lag zone encompassing zero crossing points of the voltage and current and during which the voltage and current have opposite polarities, both elements of the power switch are switched to the “on” condition, one element of the circulating switch is switched to the “on” condition when a positive current is flowing in the load and the other element of the circulating switch is switched to the “on” condition when a negative current is flowing in the load.

Abstract: A timer-thermal shutoff apparatus can control and protect an electrical appliance. The timer-thermal shutoff apparatus comprises a housing; male connector extending from the housing; female receptacle to receive a male connector from one or more electrical appliances; timer device; and thermal safety device. The timer device and thermal safety device are connected in series with the male connector and female connector receptacle to form a current path. The electrical appliance is in series with the timer device and thermal safety device. The timer device can control off-on switching and cycles for the electrical apparatus connected to the timer-thermal shutoff apparatus, and the thermal safety device providing thermal overload protection if at least one of the timer-thermal shutoff apparatus and electrical appliance reach a temperature so the thermal safety device opens the current path to protect at least one of the timer-thermal shutoff apparatus and electrical appliance.

Abstract: A system for generating a sequence of pulses of carrier having individually selectable frequencies employs a pulsed oscillator for providing a single pulse of a carrier signal having a predetermined frequency. The single pulse is applied to a dispersive filter imparting a delay to signals dependent of their spectral content. The relatively broad spectrum of the single pulse is converted by the dispersive filter into a swept frequency pulse of much longer duration than the input pulse to the filter. The expanded signal is mixed with a set of mixing frequencies to provide a set of expanded signals, each of which is then gated to attain spectral portions having desired average values of frequency. The expanded signals are then summed together and applied to a compressive filter which operates in the mirror-image format to the dispersive filter.

Abstract: A circuit for controlling a rice cooker having at least one heater used for cooking rice comprises, a rice cooking mode setting section capable of selectively setting three or more different rice cooking modes having high, medium and low heater heating calories, respectively, a main control section for fetching preset mode data set by the rice cooking mode setting section, and for supplying a predetermined energize/deenergize control signal corresponding to the preset mode data to the heater, a power interrupt detecting section for detecting a state wherein supply of a drive power voltage to the main control section is temporarily interrupted after the preset mode data is fetched in the main control section, and for maintaining the detected state for a predetermined period of time, and a power interrupt recovering operation control section for fetching a detection signal from the power interrupt detecting section when supply of the drive voltage to the main control section is recovered, and for controlling th

Abstract: An electromechanical pulse generator includes a toothed disk driven by a rotating shaft to operate two pairs of contacts to generate one pulse output and one direction-of-rotation output. The pulse contacts and the direction-of-rotation contacts operate independently of each other. The toothed disk is rotatable and axially displaceable. The axial displacement is dependent on the direction of rotation via an inclined plane in the form of a screw thread which is rotatable by the rotary shaft. By axial displacement of the toothed disk, the direction of rotation of the shaft is detected, and by rotation of the toothed disk, the pulses are generated.

Abstract: A control circuit for producing a repetitive closed-circuit, open-circuit condition between an electrical power source, such as a battery, and an electrical load comprises a positive temperature coefficient resistor in series with a relay coil. The PTC resistor is caused to alternate between a low resistance state and a high resistance state which permits energization and de-energization of the relay coil.

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: An electronic vacuum modulator is disclosed for controlling air flow to a throttle valve modulator mechanism for limiting the maximum speed of an engine and, optionally, for also limiting the maximum vehicle speed. An electric signal having a frequency proportional to engine speed is converted into an electric signal which smoothly and progressively controls a solenoid valve as the engine speed increases over a narrow range at a predetermined maximum engine speed. The valve is controlled such that the modulator mechanism progressively closes a carburetor throttle valve in the engine to limit the engine speed by limiting the available power. Optionally, a vehicle speed signal also is converted into an electronic signal which smoothly and progressively controls the solenoid valve as the vehicle speed increases over a narrow range at a predetermined maximum vehicle speed.

Abstract: This invention provides a speed sensitive device for controlling the speed of an engine. A tachometric generator is provided which supplies a voltage or a function of the engine speed, and this is compared with a reference voltage which is a fraction of the voltage of the battery.In a first stage of the comparison the voltage supplied by the tachometric generator is compared with a reference voltage fixed by a dividing bridge, which determines a comparison threshold so that, when the voltage supplied by the tachometric generator exceeds this threshold, the first stage triggers a second stage of comparison, similar to the first, which compares the voltage from the first stage with another reference voltage fixed by a second dividing bridge, this second triggering causing actuation of a switching component to modify the ignition of the engine.