Abstract: A circuit for stabilizing electron beam focusing is used for an electromagnetic focusing type camera tube having a high voltage generating circuit for supplying electrodes of the camera tube. A focusing current is supplied to an electron beam focusing coil of the camera tube. The focusing current supply circuit comprises an operational amplifier having an output terminal to which the focusing coil is connected. A detection resistor is connected between the focusing coil and an inverting input terminal of the operational amplifier. A first resistor is connected between the voltage source and a non-inverting input terminal of the operational amplifier. A second resistor is connected between a reference voltage source and the non-inverting input terminal of the operational amplifier.

Abstract: A vertical deflecting circuit for a television receiver having a first signal source for supplying a first signal which has a sawtooth wave shape and a vertical period, second signal source for supplying a corrected signal having a horizontal period, a vertical output circuit for amplifying the first signal, and a vertical deflecting coil connected to the vertical output circuit. In this case, the vertical deflecting circuit further includes a mixing circuit for mixing the first signal and said correcting signal and a resistor connected to the deflecting coil in parallel for forming with the vertical deflecting coil an integrator for the correcting signal.

Abstract: A pictorial display system in which continuously updated images of `other ship` aircraft within a specified airspace envelope are superimposed on a map display along with the pilot's `own ship` position, whereby collision threats are avoided by taking corrective flight action. This information is displayed, independently of and without interfering with ground facilities operations and communications, as a response to a low-powered signal transmitted from an onboard FM transceiver-multiplexer unit in which the response in terms of positions and altitudes of other aircraft in electrical form, is received, demodulated and then transformed into digital form. Such digital information along with "own ship" position and altitude in digital form, are fed into an altitude discriminator synchronizer unit.

Abstract: A microwave radar type of intruder detection system incorporating signal sensing, storing and comparison logic which enables the system to self-adapt to any preselected environment and produce a signal in the event of a predetermined change from the ambient conditions of the preselected environment.

Abstract: A target detecting and ranging system of the type transmitting search pulses and receiving echo pulses is disclosed. The system employs an input receiver receiving return signals and feeds them to an extracting circuit, a gate and cancellation circuit. The extracting circuit, functions to supply an input to the gate of signals containing relevant information such that gate output is only irrelevant information. The cancellation circuit, receiving the gate output and the return signals, eliminates irrelevant signals by mutual cancellation. The circuit for extracting relevant signals comprises in one embodiment a differentiator, analog store and parallel adder with a shaping circuit, clipping the output below a threshold level. Digital implementation is also discribed. The differentiator may also be replaced by a compression circuit. In a second embodiment of the system an integrator is interposed between the gate and the cancellation circuit.

Abstract: A vacuum envelope contains a photoconductive target at one end and a tubular anode electrode having light scattering properties. Light is uniformly reflected onto the target by the anode electrode from a light source mounted on the other end of the tube, outside the evacuated envelope. This uniform illumination tends to reduce build-up and decay lags at low level operating conditions. The light source is removably secured to the tube on a ceramic board incorporating an electric circuit connected to the light source for adjusting and controlling the bias light intensity.

Abstract: 1. A fuze for exploding projectiles and the like in proximity to a target, omprising, means for generating radio frequency waves, means for propagating said generated waves through the space intervening between the projectile and the target, a portion of said propagated waves being reflected back by said target toward said propagation means, means connected to said propagation means for simultaneously detecting said generated waves and said reflected waves to provide a signal for firing said fuze, said detecting means being sensitive to said reflected waves only in the presence of said generated waves, a variable impedance connected to said wave generating means, and means for varying said impedance from a relatively high value to a relatively low value thereby terminating the operation of said wave generating means to render said detecting means insensitive both to reflected waves and to spurious waves.

Abstract: 1. A fuze for detonating a projectile in proximity to a target comprising, irst normally effective transceiver channel means for effecting radiation of a first electromagnetic signal into space and for receiving electromagnetic signals therefrom, including any portion of said first radiated signal reflected from a target, second transceiver channel means initially ineffective to radiate and receive a signal adapted to being rendered effective for effecting radiation of a second electromagnetic signal into space and for receiving electromagnetic signals therefrom, including any portion of said second radiated signal reflected from a target, control circuit means for rendering said second channel means effective, and normally non-operating electroresponsive detonating circuit means adapted to being rendered operating by said channel means for detonating said projectile.

Abstract: In conjunction with a doppler radar of the type having early and late gate, leading edge tracking apparatus (i.e., tracking the leading edge of the pulse reflected by the target), circuitry for switching from a leading edge tracking mode to a doppler count tracking mode and logic circuitry for counting doppler signals and changing the range a predetermined amount per signal to estimate the range of the leading edge of a target when the leading edge is obscured by transmitter pulse feedthrough to the receiver.

Abstract: The RF power and video modulation monitoring circuit of the invention provides the unique capability of monitoring the performance of a repeater/noise jammer countermeasures system when the system is operating in either the repeater or the noise jamming mode. In the repeater mode the systems noise level is measured in an unused portion of the countermeasures system frequency band to provide a monitor of system gain and antenna VSWR. In the noise mode crystal detection and threshold comparison provides an indication of RF power output. In either jamming mode the measurement of AC in the detected output provides a monitor of modulation.

Abstract: 5. A pulse doppler proximity fuze comprising a self-pulsing oscillator for eveloping a series of radio frequency electromagnetic energy impulses, an antenna electrically connected to said oscillator for radiating said impulses into space and for intercepting reflected impulses thereby to effect a variation in the amplitude of said impulses, a pair of detectors electrically connected to the said oscillator circuit for developing an output signal in proportion to the energy of the said reflected signal during the peak amplitude of said impulse, a thyratron firing circuit said detectors having means for detecting spurious signals and target signals but utilizing only the target signals for firing the thyratron firing circuit; and an electroresponsive ignition device electrically coupled to the thyratron firing circuit, said device being ignitable upon actuation of the thyratron firing circuit by said target signal.

Abstract: A trace current is generated in a horizontal deflection winding upon closure of a trace switch. A retrace capacitor forms a resonant retrace circuit with the deflection winding upon open-circuiting of the trace switch. A second resonant circuit is coupled to an energy supply and stores energy when the trace switch is closed. A second switch couples the resonant retrace circuit to the second resonant circuit during retrace. The stored energy in the second resonant circuit is then transferred to the resonant retrace circuit and to other load circuits, such as a flyback transformer.

Abstract: 2. A combination proximity fuze comprising a radio circuit and an infrared ircuit, said radio circuit operative to produce a first voltage impulse when a reflected electromagnetic wave is received from a target, said infrared circuit operative to produce a second voltage impulse when a heat source from a target is detected, a first memory circuit connected to said radio circuit for storing said first voltage impulse for a first predetermined time interval, a second memory circuit connected to said infrared circuit for storing said second voltage impulse for a second predetermined time interval, a coincidence firing circuit connected to said first memory circuit and to said second memory circuit whereby a primer may be ignited when said first and second voltage pulses are applied to said coincidence firing circuit simultaneously within said first and second predetermined time intervals.

Abstract: A method for range-Doppler imaging of rotating objects or of stationary scenes being tracked by a sensor carried by a moving vehicle includes the transmission and reception of sequential modulated signals, coherent demodulation of the received signals, recording of the demodulated signals, and a two-dimensional processing of the recorded signals to obtain a spatial image of the scene. In the disclosed inventive concept, the demodulated signals are recorded in a two-dimensional polar format wherein the angular coordinate of the signal on the recording medium is proportional to the relative angular position of the object or scene being imaged and the radial coordinate of the signal on the recording medium is proportional to the transmitted signal frequency within each transmitted pulse.

Abstract: A horizontal deflection circuit drives a deflection winding and an ultor voltage generator. The energizing voltage for the horizontal deflection generator is regulated by a switching regulator including an SCR, a filter inductor, a filter capacitor and an SCR turn-off winding. The turn-off winding couples a retrace pulse to the SCR during each horizontal retrace interval to turn the SCR off in preparation for the following regulation interval. A second winding is magnetically coupled to the deflection circuit and through a diode to the filter inductor for providing a path by which current can continue to flow in the filter inductor during SCR nonconduction and which effectively couples the filter inductance across the deflection winding. Variations in kinescope beam current cause corresponding variations in the current through the filter inductor at the end of the trace interval.

Abstract: A radiation detector such as a radar detector is disclosed. The radiation detector includes a phase lock circuit with a modulating frequency oscillator, a radiation frequency antenna for receiving radiation, a radiation frequency modulator for modulating the radiation received with the modulating frequency, an envelope detector for detecting the modulated radiation envelope, an amplifier phase shift circuit AC coupled to the envelope detector and an alarm circuit. The phase lock circuit is responsive to the output of the amplifier-phase shift circuit. In one arrangement, the output of the phase lock circuit is a two state switch output responsive to the AC output of the amplifier-phase shift circuit. The radiation detector also includes a strip-type transmission line connecting the radiation frequency antenna, the radiation frequency modulator and the envelope detector. In one such arrangement, the radiation frequency modulator includes a p-i-n diode driven by the modulating frequency oscillator.

Abstract: A circuit for selectively supplying current to the horizontal oscillator from one of two voltage sources. The first voltage source is primarily used to supply current to the horizontal output stage and supplies the oscillator only during startup of the horizontal deflection system. The second source is derived from a winding on the flyback transformer and supplies current to the oscillator after the startup period, that is, after its voltage or another or other voltages developed by sources derived from flyback windings have reached values sufficient to assure sustained operation of the horizontal deflection system. A startup detector responsive to a flyback-derived voltage determines which of the two voltage sources provides current at the output of the starting network, that is, at the power supply terminal of the horizontal oscillator.

Abstract: On a vehicle to be navigated, a transmitter for radiating a signal having a plurality of frequencies and a receiver tuned to receive a predetermined harmonic of each of the plurality of frequencies, discriminate between the predetermined harmonics, and determine the range of position markers reradiating each of the predetermined harmonics, with a plurality of passive markers, each having a nonlinear electrical response characteristic and each tuned to reradiate the predetermined harmonic of a different one of the plurality of frequencies when the radiated signal from the transmitter impinges thereon, fixedly mounted at predetermined positions relative to a desired course to be traveled by the vehicle.

Abstract: 2. An apparatus for producing a substantially noncyclic sequence of binary electric values, including a driving gear, a plurality of driven gears associated with said driving gear, each of said driven gears having a pattern disc carried thereby, each said disc having a plurality of radial slots in its periphery, means for utilizing the slots of each said disc to produce a sequence of binary electric values, means for substantially combining pairs of sequences so produced, value by value, to produce a lesser number of new sequences of binary electric values, and means for combining said new sequences in pairs, value by value.

Abstract: A radar beacon apparatus comprises a slot antenna for transmitting and a slot antenna for receiving which are respectively disposed in the substantially same axial direction and a transmitting unit and a receiving unit which are respectively connected to each end in the axial direction of the slot antenna as body parts. The body part is outwardly covered with a radar dome case made of a transparent sphere of waves (radio permeable material).