Abstract: The invention provides a one-piece protective cap, discretely formed of semi-rigid material, which encloses the major area of a CRT base. The cap, which maintains alignment of the connector pins of the tube, completely shields the vulnerable areas of the base from possible contamination, and thereby prevents the possible development of resultant leakage and arcing thereacross. The cap is retained on the base by the utilization of a plurality of spatially-related nubbins in the cap interacting with the sidewall of the base to provide a plurality of pressured retention areas.

Abstract: The invention relates to an improvement in the photo-exposure system utilized in the forming of stripe-patterned screens on the viewing panels of color cathode ray tubes. The versatile system incorporates an adjustable electronically controlled cam arrangement for achieving desired oscillation of the exposure light source. A cam associated multi-apertured control disk initiates a pre-determined number of pulses which accurately control the degree of cam movement and resultant light source oscillation.

Abstract: The invention provides an improvement in the electrical connective means for effecting interconnection between the mask electrode and panel components in a color cathode ray tube. A protruding element on the resilient contactor mates with an aperture in the mask frame to provide a contactor retention and release mechanism which is beneficially utilized during screen fabrication.

Abstract: An improved color television picture tube static convergence device having a guide-member with bent ledges which slidably mate with circular grooves in sides of non-magnetic rings, the guide-member having a hole for radially positioning a rod with a knob and a pinion which engages mating bevel gears in a conventional magnetic ring pair positioned between the non-magnetic rings.

Abstract: The invention represents a combination means for positioning the electrical contactor in a cathode ray tube mask-panel assembly at a temporary placement substantially contiguous to the side of the mask. Being so positioned, the danger of contactor initiated abrasion of the panel during screen fabrication is substantially eliminated. The contactor, oriented between a pair of open-end hollow rib structures on the mask, is held in retractive placement by a straddling dual pronged structure accommodated by the ribs.

Abstract: A protection circuit for television receiver picture tubes and related components which includes a diode which is forward biased during normal operation to provide coupling of the tube control grid to ground or reference potential and which is reverse biased during operation at excessively large beam currents, the reverse biasing of the diode causing the beam current to flow through a large grid-cathode resistor thereby effectively limiting electron beam current.

Abstract: A circuit for use in a television receiver to obtain a variable-length bar on the television screen which indicates the optimum antenna position, the circuit comprised of at least two monostable multivibrators with input terminals triggered by horizontal and vertical synchronizing pulses and with outputs coupled through an AND circuit to a video/chroma driver amplifier. The pulse length of one of the multivibrators is caused to vary in relation to the strength of an AGC signal in the video signal path of the receiver by coupling the AGC output to the time-constant-determining network of the multivibrator.

Abstract: A high voltage terminal with a television receiver flyback transformer and other high voltage circuit components enclosed in a resin-filled, non-conductive container, the terminal comprised of a conducting tab partially surrounded by a plastic casing positioned to allow drilling from outside the container through primarily plastic materials and also comprising a conducting pin inserted in the hole to provide electrical contact with the tab.

Abstract: An electronic clock radio using a clock integrated circuit and a radio integrated circuit. A first energizing potential when applied to the NAP/SLEEP input connection of the clock circuit, causes the clock circuit to switch from a first electric state to a second electric state. After a selected interval of time, not greater than 60 minutes, the clock circuit switches from the second electric state to the first electric state. The radio, normally in an OFF state is placed in an ON state only upon receiving a second energizing potential applied to its input connection. A control circuit, having a manually operable switch with NAP and SLEEP positions and being responsive to the electric states of the clock circuit, connects this second energizing potential to the radio input only when:(i) the manually operable switch is in the NAP position and the clock circuit is the first electric state, or(ii) the manually operable switch is in the SLEEP position and the clock circuit is in the second electric state.

Abstract: An improvement in a television receiver circuit for producing rapid discharge of the capacitors of the primary d.c. power supply upon turn-off of the receiver. The disclosed improvement eliminates the need for conventionally used bleeder resistors by the addition of a direct coupling means to existing horizontal sweep circuitry to derive a current which switches the horizontal driver transistor to continuous conduction upon turn-off of the receiver, thereby rapidly discharging the capacitors of the main power supply.

Abstract: A circuit for transmitting a jamming signal for disruption of a television signal transmitted along a cable or other guided path toward a television receiver, the circuit having a first oscillator means providing an audio frequency signal which is used to frequency modulate a second oscillator means between the signal video and audio carrier frequencies inclusively and having a third oscillator means providing square-wave horizontal-sweep-frequency signal which is used with an amplitude-modulating means for amplitude-modulating the output of the second oscillator means to produce a jamming signal for directional coupling into the guided path for the purpose disrupting both audio and video content of the television signal.

Abstract: A high-speed, solid-state, electronic circuit for alternately coupling two separate video signal paths to a third video signal path in response to high frequency square wave excitation, the circuit utilizing two dual-gate metal oxide semiconductor field effect transistors having oppositely phased signals applied to respective switching gates for cancellation of switching transient signals.

Abstract: Circuitry implementing at least two amplitude level detectors and a method for monitoring their ability to track rapid changes in signal level is shown. The monitoring circuit uses a delay network to provide an indication that the detectors have not been driven into conduction during a specific interval of time. If this operation persists, a resetting circuit discharges the detector output filter network, thereby allowing the detectors to re-establish an output indicative of the present input signal level. A commutating circuit is shown which allows a single delay network to be used in conjunction with at least two level detectors.

Abstract: A toroidal vertical deflection winding for use with a yoke designed for a large screen, color cathode ray tube having in-line guns and a wide deflection angle, the winding constructed to achieve deflection and self-convergence of the electron beams over the entire screen of the tube without coma effect, the winding comprised of a frustrum-shaped magnetic core with three quarter-section primary clusters of toroidally wound conductors formed thereon in predetermined arcs, the conductors of at least one of said primary clusters being non-radially wound, said conductors being positioned generally geometrically parallel to each other and said primary clusters having substantially predetermined numerical conductor relationship.

Abstract: A video processing system for a television receiver is shown. The video processing system includes a gain controlled stage through which a video signal is coupled. The gain of the stage is controlled to provide contrast control of the video signal. The video signal is also applied to an aperture correction circuit which develops an aperture correction signal including pre-shoot and over-shoot transient responses. The aperture correction signal is also coupled through the gain controlled stage so that it is amplified or attenuated by the same amount as the video signal. The output of the gain controlled stage is coupled to an output stage. A portion of the video signal from the output stage is compared to a reference voltage in a black level control circuit. The control signal from the black level control circuit is applied to the output stage to control the black level of the video signal. The disclosed video processing system is further adapted for fabrication in integrated circuit form.

Abstract: Apparatus for inserting electrical connecting pins or terminals into preformed holes in a circuit board, the apparatus comprised of a vibrating table means and a press means having parallel first and second plattens, a parallel intermediate platten positioned between the first and second plattens by resilient means, the first platten having perpendicularly attached stand-off posts aligned with pin guide holes in the intermediate platten and with pin clearance holes in the second platten, the first and second plattens having slidably attached positioning means for positioning the intermediate platten in two different positions during operation, a pin loading means with template having slidably attached gate means and having tapered holes, the gate means having holes alignable with the pin guide holes and the tapered holes.

Abstract: A controlled current source circuit using PNP mirror transistors and having wide frequency bandwidth as well as correction for D.C. offset, said circuit comprised of first and second PNP transistors, one of which is connected as a diode, the base terminals of which are commonly connected, the collector terminals of each of which are connected respectively to first and second terminals of a current bias means providing control of emitter-base characteristics and correction for offset caused by base currents, the emitter terminals of which are each connected respectively to first and second resistors, the resistors connected to common potential source, wherein mirror currents are tapped from the connections between the emitter terminals and the resistors and wherein the output mirror current is the collector current of an NPN transistor, the base and collector terminals of which are respectively connected to the collector and emitter terminals of the second PNP transistor.

Abstract: A method for removal of newsprint paper remaining on cores after the majority of the rolled paper on the cores has been used for printing newspapers, the method comprised of emplacing the depleted roll with core in a cradle positioned parallel to an open-end, rotatable shaft with polished surface, partially uncoiling the depleted roll, then causing the paper to be transferred from the core to the rotating shaft, removing the paper from the open end of the shaft and disposing thereof, retaining the core for future use.

Abstract: A light-indicator circuit is disclosed which permits visual indication of clipping caused by the over-driving of a transistor amplifier. The circuit includes a light-emitting diode connected in parallel with the collector-emitter path of a switching transistor which is biased to conduct during low-signal-level operation of the amplifier. The switching transistor is caused to switch to its non-conducting state when the amplifier is overdriven, thereby activating the light-emitting diode. Means may be provided to delay switch-back once activation of the light-emitting diode has occurred. Means may be provided to inhibit activation of the circuit by over-driving signals of limited duration.

Abstract: An electrical circuit arrangement for filtering electrical brush noise transmitted from an open switching wire connected at one end to an intermittently used brush of a multi-speed electric motor driven by a power source and having an electrically grounded housing and stator, said circuit arrangement utilizing a switching transistor located in close proximity to said brush and motor.