Abstract: In a signal receiver utilizing a video signal having a blanking signal with a backporch portion whereat a color burst signal is disposed includes a ramp potential development means responsive to a pulse signal as well as a potential storage, clamping, and slope altering means for effecting alterations in the width of a burst gate potential. In another aspect, a potential storage, clamping, and slope altering means is responsive to the ramp potential development means for effecting clamping of the backporch portion of the blanking signal.

Abstract: Raster and particularly top and bottom pincushion distortion in a cathode ray tube system is corrected by applying a drive signal from the vertical output system of a television receiver to the vertical deflection winding of a yoke to effect activation of switching elements whereby correction signals of the proper phase and amplitude and derived from the horizontal scan system are applied to the vertical deflection winding such that a vertical deflection potential at a frequency fv is modulated by a horizontal deflection potential at a frequency fh and of the correct phase and magnitude.

Abstract: A fast warm up cathode comprises a substantially cup-shaped top cap and a hollow cylindrical sleeve axially displaced from the top cap. Means are provided for joining the sleeve and the top cap into an integral unit. The means comprise a plurality of individual rod-like members having extremities substantially flat for attachment to the top cap and the sleeve. The plurality of rod-like members are equally spaced about the periphery of the sleeve and the top cap.

Abstract: A broadband amplifier with a negative feedback circuit having a variable resistance means and first and second parallel resistor-inductor combinations for slope control is shown. The variable resistance means establishes the overall frequency response and can be electronically varied to provide automatic gain control. The first and second parallel resistor-inductor combinations provide compensation for deviations from the desired frequency response over respective first and second frequency ranges.

Abstract: A frequency discriminator utilizing a pair of surface wave devices each comprising one transducer on a piezoelectric substrate connected in series with a signal source and a pair of envelope detectors connected in series with the surface wave devices is shown.

Abstract: Frequency discriminators utilizing a pair of surface wave devices each comprising one transducer on a piezoelectric substrate connected in parallel with a signal source and a pair of envelope detectors connected in parallel with the surface wave devices are shown.

Abstract: A process for forming a color cathode ray tube screen structure, having means for enhancing the absorption of ambient light and providing improvement in the contrast of the image display involves the deposition of three superimposed substantially continuous window-defining layers of optical filter materials. The primary, secondary and tertiary filter layers have discretely disposed window areas formed therein to expose a pattern of filter areas representing the respective filter materials. The filter windows are of a shaping similar to that of the apertures in a spatially related pattern mask member. Each window exhibits a uniform periphery free of indentations, being so defined by a uniform opaque interstitial encompassment homogeneously made up of the three distinct layers of filter materials.

Abstract: The invention provides a temporary light attenuation coating modification of the apertures in a multi-apertured pattern member for utilization in selected steps of the procedure for fabricating a patterned color screen structure disposed on the interior surface of a cathode ray tube viewing panel. The modification is in the form of a dried coating of a water-soluble polyhydric secondary alcohol uniformly covering the apertured portion of the pattern member to effect a bridging meniscus of coating in each of the apertures. Dissolved in the coating vehicle is a homogeneous dispersion of a ultraviolet absorbing material. Each attenuating meniscus effects a differential or graded degree of uv absorption resultant of the inherent variation in thickness of the bridging formation and the amount of uv absorber dissolved therein. In addition, the absorptive coating residual on the interstitial areas defining the apertures reduces deleterious reflections of actinic radiation during screen structure fabrication.

Abstract: An electronic ballast circuit for reducing the warm up time of high intensity discharge (HID) lamps wherein lamp current flow is abruptly reduced by a switching means responsive to load voltage variations upon attainment of power in an amount sufficient to activate the HID lamp.

Abstract: An improved multipack container is provided for accommodating a plurality of cathode ray tubes during transportation and storage. The altered construction includes basic top and bottom rigid closure members formed of flame retardant plastic material. Positioned peripherally therebetween are two substantially U-shaped edge-oriented areal support members, such being opposingly located between the superjacently related ledges of the respective closure members. Since the forward portions of the U-shaped supports do not meet, a beneficial window opening is provided on either side of the multipack structure. Internal supportive and protective structural means are predeterminately located between the closures in a manner spaced from the peripheral support members. Upon assembly of the multipack container and placement of the tubes therein, a tight covering of plastic material is applied to contiguously encompass the complete multipack to provide a unitized assemblage.