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Accessible Drive Coil Arrangement for Bubble Device Tester

IP.com Disclosure Number: IPCOM000049433D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Concepcion, F: AUTHOR [+2]

Abstract

Accessible drive coil arrangements for bubble device testers have two coil axes which coincide with each other and with the axis of access, as shown in the drawing. The drive coil arrangement 10 has a coil 12 that is orthogonal to coil 14 because they are wound at an angle of 45 degrees with respect to the coil axis. Access to the inside of the drive coils 12 and 14 is through the coil end openings 16. Accessibility is obtained at an increase of coil volume or its VI product, i.e., coil voltage times current. This one-sided access design requires 25 percent more ct. VI product.

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Accessible Drive Coil Arrangement for Bubble Device Tester

Accessible drive coil arrangements for bubble device testers have two coil axes which coincide with each other and with the axis of access, as shown in the drawing. The drive coil arrangement 10 has a coil 12 that is orthogonal to coil 14 because they are wound at an angle of 45 degrees with respect to the coil axis. Access to the inside of the drive coils 12 and 14 is through the coil end openings
16. Accessibility is obtained at an increase of coil volume or its VI product, i.e., coil voltage times current. This one-sided access design requires 25 percent more ct. VI product.

A symmetrical implementation, having an opening at both ends, which permits bubble devices to be passed through, i.e., entering from one side and exiting from the other side, may also be used. The symmetrical design requires 50 percent more VI product.

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