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Deflection Yoke Tester

IP.com Disclosure Number: IPCOM000098701D
Original Publication Date: 1959-Oct-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Healey, JF: AUTHOR

Abstract

A probe tester for precisely indicating the direction of a magnetic field within a deflection yoke is shown. The probe consists of three printed circuit boards which are fastened together. Each printed circuit board has a forty turn coil printed on each side. The coils are connected in series and the probe is center tapped for common mode rejection. The probe is mounted on a shaft which carries at one end slip rings for picking up the voltage induced by the magnetic field being measured and an azimuth indicator for detecting the direction of the magnetic field being tested.

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Deflection Yoke Tester

A probe tester for precisely indicating the direction of a magnetic field within a deflection yoke is shown. The probe consists of three printed circuit boards which are fastened together. Each printed circuit board has a forty turn coil printed on each side. The coils are connected in series and the probe is center tapped for common mode rejection. The probe is mounted on a shaft which carries at one end slip rings for picking up the voltage induced by the magnetic field being measured and an azimuth indicator for detecting the direction of the magnetic field being tested.

The probe will indicate a null when it is disposed parallel to a magnetic field, and if orthogonality is being measured, the probe is rotated 90 degrees as read on the azimuth indicator and a second null will be obtained if the magnetic fields are properly disposed relative to each other. The use of printed circuit coils presents a perfectly flat two dimensional coil so the direction of the magnetic field may be precisely determined. The preciseness is important in determining if deflection yokes conform to the required orthogonality.

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