# US 4,383,233 A · Television deflection yoke

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- Number: US 4,383,233 A
- Document ID: US4383233A
- Status: Granted
- Kind: A
- Application number: 06/287,093
- Filed: 1981-07-24
- Granted: 1983-05-10
- Earliest claimed: 1981-07-24
- Assignees: RCA Corporation
- Inventors: William H. Barkow
- Web page: https://patentgrep.com/patent/US4383233A

## CPC

- H01J 29/764: {using toroidal windings}
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)

## Abstract

A television deflection yoke comprising a deflection coil made up of a plurality of wire turns. The coil is twisted to form a "Figure-8" pattern having two loops and a wire crossover region. The coil is then molded such that the two loops fit over a portion of a yoke core. The coil loop then forms active conductor portions of the deflection coil. Accurate coil winding distributions may be achieved during winding or forming of the coil without concern about core shape or dimensional variations.

## Claims

### Claim 1

A deflection yoke for use in a television receiver comprising:
a magnetically permeable core, incorporating two core halves;
a deflection coil adapted to be toroidally disposed on each of said core halves comprising:
a plurality of wire turns, each of said turns forming first and second loops and a wire crossover region between said loops, said wire turns disposed to bring said first and second loops into substantially parallel orientation such that said coil is toroidally disposed on one of said core halves with said first and second loops encircling said core.

### Claim 2

A method for forming a deflection coil to be toroidally disposed on a magnetically permeable core of a deflection yoke comprising the steps of:
forming a wire coil comprising a plurality of wire turns;
twisting said wire coil to form a coil having first and second wire loops and an intermediate wire cross-over region;
molding said twisted coil to define the shape of said wire loops; and
placing said molded coil on said permeable core in a toroidal orientation such that said shaped wire loops form electrically active conductors of a deflection coil.