Zenith Electronics Corporation

Zenith Radio Corporation

Arthur J Lostumo

Steven J Pulchinski

Paul E Brodzik

Bernard M Wiltgen

Bernard D Danenberg

John K Shaffstall

A mirror for a rear projection television receiver is formed of stretched and heat-shrunk metallized plastic film A U-shaped aluminum frame is formed out of roll stock and cut and bent into the desired shape The frame has a flat front surface that includes a smooth raised inner edge in contact with the metallized plastic film, which is adhesively secured to the flat front surface of the frame. A rigid backing is secured in close proximity to the metallized plastic film by having its edges sandwiched by the U-shaped frame. The frame has support brackets affixed thereto.

Metallized plastic film mirror for projection television receiver

A high voltage focus potentiometer module includes a housing having a plurality of connection cavities and corresponding wire guides formed therein. A substrate is secured within the housing. The substrate includes the stationary elements of the potentiometer, the wiper of which is located in a recess that is surrounded by a flexible seal. Conductive rubber inserts are loosely fitted in the cavities and are adapted to be piercingly engaged by wires in the wire guides and in contact with corresponding conductive pads on the substrate. Channels are provided in the housing to permit flowable epoxy to surround the conductive rubber inserts and wires in the cavities. A high voltage transformer includes a shell having an open side to which the potentiometer module is snap-fitted. A conductive element on the transformer is positioned in the open side and is adapted to be piercingly engaged by a conductive rubber plug that also engages a conductive pad on the other side of the substrate. The entire assembly is potted.

Solderless focus module

The self-cleaning wire stripper includes a wire stripping element, such as an RF coil, which burns insulation from a segment of wire. A wire guide, such as a insulating burn tube, positioned within the wire stripping element guides the wire through the wire stripping element. The self-cleaning wire stripper uses a reamer having a wire channel such that the wire passes through the reamer. At the desired time, such as at the end of every burn operation, the reamer cleans the wire guide, resulting in no down time for tube removal/cleaning. The reamer cycle time is transparent to the process and does not slow down throughput because reaming occurs during the coil winding process.

Self cleaning wire stripper and method

A quick release apparatus for a high voltage line connecting to a CRT sweep transformer has a plug with a split sleeve for grasping and retaining the high voltage lead when inserted into the transformer housing. The transformer housing contains an insulative sleeve as well as a conductive rubber pad for shorting the lead to the sweep transformer. The quick disconnect system is reliable and easily manufactured owing to its few parts.

Quick release for CRT anode conductor

A thick film resistive network circuit board to be potted is given a surface coat of epoxy on one side which does not cover the solder pads or electrical connections, thereby allowing further working of the board. The epoxy coat is applied in such a fashion that it does not obscure or cover a second side of the board having a potentiometer network thereon in the preferred embodiment. The epoxy coat provides a good surface for adhesion of a potting epoxy as well as good adhesion to the board, and thereby prevents breakdown of the dielectric properties of the high voltage circuitry into which the board is fitted.

High voltage resistive network circuit board with good potting adhesion

In a projection television display having three CRTs, the anode voltage wiring is simplified and made more economical by providing one CRT with a first anode button having voltage takeoffs for the other two CRT anode caps. The wire connections in the first anode cap allow for quick, tool free connection and disconnection of the wires.

CRT anode cap with three lead quick disconnect

A junction box provides for interconnecting a plurality of sheathed, bare-end, high-voltage conductors for cathode ray tubes and the like. The junction box includes an enclosure, a plurality of spaced, parallel-arranged leaf-spring terminals mounted within the enclosure, and a like plurality of guides for guiding conductors into the enclosure and into contact with respective terminals. Ganged cams mounted on a slider provide for simultaneously locking a plurality of conductors in the enclosure against withdrawal by counter-deflecting the terminals against the conductors and prevent withdrawal from the enclosure. In addition to the quick connection of high-voltage conductors, the junction box provides for controlling the static and dynamic focusing of an electron gun.

Cathode ray tube electrical junction box

An anode connector assembly provides for connecting to a CRT anode cup a high-voltage conductor consisting of a metal wire covered by resilient insulation. The assembly comprises clamping means for clamping, against the resilience of the insulation, the insulation and a length of bare wire folded back over the insulation. The clamping means including means for making electrical and mechanical connection to the anode cup, whereby an electrical potential carried by the conductor is applied to the anode cup through the wire and the clamping means.

Anode connector assembly for a cathode ray tube

A high voltage coil manufactured by alternately winding coils and mounting rigid insulating tubes on a coil form having end plates with terminals. After each coil is wound with its ends terminated at the end plates, a first axially slitted insulator tube is snapped over the coil with about a one-quarter inch gap and a second tube with no gap is snapped over the first rotationally displaced 180 degrees enclosing the gap which forms a flow conduit. Another coil is wound on the second tube and the process is repeated to form as many as six coils. Potting material is applied to the completed assembly and vacuum impregnated, and the tube conduits form flow paths to achieve complete impregnation.

High voltage coil having split plastic tubes

A miniature high voltage connector for a CRT including a rubber receptacle having a common conductor plate insert molded therein. A clam shell housing for the receptacle engages the conductors and prevents their withdrawal from the receptacle.

Miniature high voltage connector

An epoxy resin composition, especially useful as an encapsulant and exhibiting a low dissipation factor, is prepared from a first component comprising an epoxy of a polyglycidal ether of a polyhydroxyl phenol and filler, and a second component comprising a cycloaliphatic acid anhydride curing agent, filler and catalyst. Each component is mixed separately under high shear, and the filler for each component comprises at least about 50 percent by weight. The two components are admixed, applied as an encapsulant, and cured at an elevated temperature.

Epoxy compositions, and method of making same

A toroidal coil is wound around a donut-shaped ferrite core through which passes one or more conductors for detecting a high current pulse within the conductors. An interface block includes a generally circular recessed upper portion for receiving the toroidal coil/ferrite core combination and further includes a pair of aligned, spaced slots extending between the upper and lower surfaces and within the recessed upper portion of the block. Each of the conductors is in the form of a strip-like metal conductor and is disposed within and along the length of a respective slot in the interface block. The upper end of each strip-like conductor is adapted for mounting to an upper portion of the interface block and coupling to a respective first lead by means of a first mounting screw. Similarly, the lower end of each strip-like conductor is adapted for mounting to a lower portion of the interface block and coupling to a respective second lead by means of a second mounting screw. The ends of the toroidal coil are positioned within a respective groove in a lateral portion of the interface block and extend to the lower surface thereof where they are connected to respective terminal pins for coupling the toroidal pick-up coil to appropriate circuitry on a printed circuit board.

Current sensor arrangement

A sweep transformer such as used in a raster scanned video display includes first inner and second outer cylindrical bobbins, with the outer bobbin having a plurality of secondary windings disposed along the length thereof and a plurality of paired terminal pins each coupled to respective ends of each of the windings and arranged in two parallel linear arrays along the length of the bobbin. The terminal pins are adapted for insertion in a plurality of apertures arranged in a pair of spaced, parallel, linear arrays in a printed circuit (PC) board for coupling to conductors and electronic components on the PC board by soldering. The bobbin further includes a pair of snap-acting latches disposed in a spaced arrangement along the length thereof which are each adapted for insertion within a respective aperture in the PC board for securely mounting the transformer thereon. The transformer may be assembled and mounted on the PC board by automatic handling means.

Sweep transformer with terminating PC board

A pickup coil assembly comprises a pancake-shaped coil mounted in a plastic form having a pair of parallel support posts therethrough. The form is positioned in a plastic housing having a central aperture in one wall formed by cut away jaw portions for gripping a conductor inserted therethrough. A back wall of the housing includes a co-axial aperture of larger dimension to permit free passage of the conductor.

Pickup coil assembly with coaxial feed

A high voltage disconnect plug and a receptacle therefor are described for use in coupling a high voltage conductor to a load such as a CRT. The plug includes a lock nut and a deformable annular ring through which the conductor passes, and a hollow sleeve which slides over the conductor to capture the ring between the sleeve and the lock nut. A spring carried by the sleeve engages a contact on an end of the conductor which passes through the sleeve. Insertion of the plug into a bore in the receptacle compresses the spring between the conductor's contact and a high voltage contact in the bore for coupling high voltage to the latter contact. Locking the nut to the receptacle deforms the ring to tightly seal it against the receptacle's inner wall around the bore.

Growing community of inventors

Franklin Park, IL, United States of America

Arthur J Lostumo