Abstract: A mounting arrangement for mounting a ballast transformer to a structural support member. As employed in accordance with the invention, the ballast transformer has an opening through the core portion thereof. A pair of L-shaped mounting members are mounted to the ballast transformer by means of a pair of elongated, compressible mounting pins, commonly known as "rollpins," which are driven through openings in the vertical portions of the L-shaped mounting members into opposite entrances of the opening in the ballast transformer. The mounting members are then secured to the structural support member by means of threaded fasteners which are inserted through openings in the structural support member and threaded into openings in the horizontal portions of the L-shaped mounting members. The threaded fasteners are selected to have lengths so that the threaded portions thereof will extend past the exposed ends of the mounting pins and be immediately adjacent thereto.

Abstract: A cemented carbide composition is disclosed that consists essentially of a carbide of a refractory metal selected from Group 4, Group 5, and Group 6 metals and mixtures thereof and a binder selected from one of the foregoing refractory metals and from 0.5 to 1.5% by weight of an iron group metal. A process for producing these materials is also disclosed which comprises forming an intimate admixture of the desired refractory metal carbide, the desired refractory metal, an iron group metal, a paraffin wax and a volatile mixing aid. Thereafter, the mixing aid is removed by heat. The resulting powder particles are compacted to a predetermined shape and heated at a temperature sufficient to remove the wax and thereafter are heated at a temperature above the melting point of the catalyst and thereafter elevated in temperature to achieve suitable sintering.

Abstract: Increased luminescence intensity in magnesium aluminum gallate phosphors as well as magnesium gallate phosphors is achieved by utilizing a fluorine source in the raw material mix and by conducting initial processing in a humid, oxidizing atmosphere. Additionally, processing time is drastically reduced.

Abstract: A frequency discriminator utilizing a surface wave device is described wherein threshold means are used to suppress spurious responses due to the side lobes and other parasitic effects of the surface wave device.

Abstract: An internal improvement is provided in a cathode ray tube wherein the electron gun assembly is positioned in close proximity to the sidewall of the encompassing neck portion of the tube envelope. The improvement is in the form of discrete shielding means incorporated in conjunction with one or more electrodes in the forward portion of a multi-beam electron gun assembly to minimize the effect of positive neck charge on the trajectories of the electron beams traversing the portions of the assembly closely related to the neck wall. Each shielding means is comprised of an element formed of substantially round wire material configurated as a U-shaped member, whereof the bottom bridge-portion of the member is substantially contiguous with the rolled rim of the associated electrode, extending outward therefrom toward but not touching the adjacent glass wall of the neck.

Abstract: Brackets mounted on the frame of a shadow mask extend into the space between the wall of the frame and the wall of the face plate of a color cathode ray tube. In the event of transverse movement of the frame, such as from a physical shock, the bracket contacts the stud in the side wall and limits permissable movement of the frame, thus preventing damage to the fragile mask.

Abstract: In a television receiver having a chrominance signal channel coupled to a cathode ray tube, an automatic peak color control circuit includes an envelope detector means providing a combined chroma envelope and DC potential, a means for shifting the level of the combined chroma envelope and DC potential, a means for detecting the peak level of the chroma signal, and a means for comparing the detected peak chroma signal level and a reference potential level to provide a control signal for maintaining application of a substantially constant level of chroma signal to the cathode ray tube.

Abstract: An electrical bussing and jumper assembly for use with electrical switching devices such as circuit breakers in a three-phase distribution system. The bussing and jumper assembly comprises three relatively-thin, wide bus plates stacked together in a compact sandwich-like array. Each of the plates has a plurality of openings therein defining a pair of parallel side portions and a plurality of jumper portions transverse to and bridging the side portions. The jumper portions of bus plates are variously concave (top bus plate), flat (center bus plate) and convex (bottom bus plate) and spaced from each other such that when the bus plates are stacked together, the jumper portions are arranged in a ladder-like array and central portions of the jumper portions are all in a common plane. The bus plates are insulated from each other by means of insulative coatings (e.g., of polyvinyl chloride) formed on the plates and also by means of sheets of insulative material (e.g.

Abstract: Two or more self-adjusting electrical conductive snubber means are employed in an electron beam device to effect concentricity of the electron gun structure within an encompassing portion of the envelope. Each of the snubbers is a longitudinal resilient metallic member fabricated of flat material and formed for placement on an electrode of the gun structure in an orientation normal to the axis thereof. The central portion of each snubber is an attachment area having like transition portions formed at each end thereof, wherefrom similar resilient lever arms extend in an opposed longitudinal manner, each having a contact element terminally formed thereon. In usage, each of the lever arms is flexed from a relaxed to a compressed position within the envelope in a manner tangential to the positioning electrode to provide an accommodating fulcrum therewith.

Abstract: Spark gap apparatus is provided wherein a wafer of electrical conducting material is affixed to a wafer of electrical insulating material and spaced from a circular array of circular pins of an electron discharge device to provide a spark gap intermediate the wafer of electrical conducting material and certain ones of the circular pins of the electron discharge device.

Abstract: A remote control receiver for a television receiver remote control system having a memory capacitor and a field-effect transistor readout to provide a direct control voltage is shown. Circuit means illustrated as a diode connected in series with the memory capacitor limits the magnitude of the charge stored by the memory capacitor to prevent the field-effect transistor from being driven beyond cut-off by an excessive amount.

Abstract: A very stable voltage reference potential is provided by circuitry wherein an avalanche device provides an output voltage which is, in turn, applied to a voltage to current converter to provide a current for the avalanche device which is dependent upon the output voltage rather than the voltage of the avalanche device.

Abstract: A TDM switching network for a communication system having 17 input transmission lines for carrying TDM digital signals in 64 input channels on each input line and having 15 output transmission lines for carrying TDM digital signals in 64 output channels on each output line. The TDM switching network establishes connections between selected input and output channels in accordance with address instructions having A and B address segments each designating a particular channel of a particular transmission line. The switching network includes 15 switching matrices (plus a spare). Each matrix is connected to all 17 of the input transmission lines and to a different one of the output transmission lines. Each switching matrix includes a data memory which can store a data bit for each channel of each transmission line. Each matrix also includes an address memory which can store an address segment for each channel of the associated output transmission line at a corresponding storage location.

Abstract: A power amplifier and loudspeaker protection circuit for a receiver having an AC potential source with a center-tap transformer shunted by a full-wave bridge rectifier and a power amplifier directly coupled to a loudspeaker connected to a potential reference level includes a thermal relay means coupling the bridge rectifier through normally closed contacts to a power amplifier stage and an impedance coupling the transformer center-tap to a potential reference level to activate the thermal relay means and disconnect the potential source in response to increased current flow in a loudspeaker.

Abstract: In a signal receiver having a potential source and an amplifier stage connected to a loudspeaker, a loudspeaker and amplifier protection circuit includes a normally closed switch coupling the potential source to the amplifier stage and a protection circuit coupled to the output of the amplifier stage and responsive to positive or negative polarity DC potentials for activating the switch to disconnect the power supply from the amplifier stage.

Abstract: An improvement combination is provided in cathode ray tube construction for expediting improved tube processing and subsequent tube operation. The combination is incorporated in the funnel portion of the tube wherein a first low resistive electrical conductive coating is interiorly disposed in a substantially circumferential manner on the forward portion of the funnel nearest the screen. A high resistive electrical conductive coating is substantially circumferentially interiorly disposed on substantially the intermediate portion of the funnel being contiguous with the first coating, and making contact with a second low resistive electrical conductive coating interiorly disposed on substantially the rear portion of the funnel. This second coating extends into the forward region of the integral neck portion to facilitate electrical connection with the electron gun assembly positioned therein.

Abstract: Performance of fast warm up cathodes can be improved by providing a black heat radiating surface on the interior of the cathode cap. A particular material can be nichrome which is a nickel chromium alloy. The cathode cap material can be selected from any of the known cathode nickel alloys. A preferred method for accomplishing the result includes the steps of cladding a selected nickel alloy with the nichrome material and then forming the substantially cup shaped cap with the clad material on the interior thereof. The formed cathode cap is then fired for about 10 minutes or longer in wet dissociated ammonia at a temperature of about 900.degree. to 1300.degree.C to oxidize the available chromium on the surface of the nichrome. This produces an even dark surface thereon which has much higher heat radiating capabilities than the silver looking nickel cathode alloy.

Abstract: An improved internal support is incorporated in a multipack container for accommodating a plurality of cathode ray tubes during transportation and storage. The multipack construction includes top and bottom rigid closure members formed of plastic material in conjunction with peripherally oriented and edge positioned support. The internal supportive construction of the invention is oriented within the multipack in a manner to effect vertical support between the closure members. This improved support is formed from a unitary sheet of rigid material having predefined folding-scores therein, which when folded, provide individual protective compartments for two cathode ray tubes. The unitary construction of this internal supportive along with the multiple folds of the integration, provide improved structural rigidity and enhanced protective characteristics.

Abstract: There is described an apparatus for unwinding substantially round coils of strip material. The apparatus comprises a frame having two upstanding side members, a pair of alignment members adapted for movement toward and away from each other within the apparatus to align the coil, and a plurality of rollers for engaging the coil's periphery to achieve rotation of the coil.

Abstract: A process for producing ammonium metatungstate (AMT) from ammonium tungstate (AT) solution is described which involves the addition of about 3.6 percent by weight of silica to an AT solution, digestion for at least about 4 hours at a temperature of at least about 98.degree.C, followed by filtration to remove the silica from the AMT solution. Typically about 0.4 percent by weight of silica remains after filtering. The resulting AMT solution may be further processed to recover solid AMT, such as by evaporation or spray drying.