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Electromagnetic Transducer

IP.com Disclosure Number: IPCOM000096862D
Original Publication Date: 1963-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Colligan, JJ: AUTHOR [+3]

Abstract

The electromagnetic transducer in A has strips 1 and 2 consisting of parallel strands of wire 3, commoned at their upper and lower ends. These strips are connected in series by wire 4. Thus, current supplied to 1 in the direction of the arrow flows in parallel up through the strands of 1, then down through 4, then in parallel up through the strands of 2 and out wire 5.

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Electromagnetic Transducer

The electromagnetic transducer in A has strips 1 and 2 consisting of parallel strands of wire 3, commoned at their upper and lower ends. These strips are connected in series by wire 4. Thus, current supplied to 1 in the direction of the arrow flows in parallel up through the strands of 1, then down through 4, then in parallel up through the strands of 2 and out wire 5.

Since current flows in the same direction, i. e., upward, through each strip, the strips are attracted relatively toward each other through the gap x. The magnetic force of attraction between the strips is independent of gap x, provided the overall width w of the strips is at least five times the gap. If desired, the strips can be replaced by plates of copper or other electrically conductive material. Also, one strip or plate can be fixed and the other maintained normally spaced from the fixed strip or plate by a bias device, such as a spring, not shown.

In B, the principle is used in a push-pull type electromagnetic transducer. Current supplied to wire 6 flows clockwise and upward through outer windings 7 of coil 8 and down through the inner windings 9 of the coil. When current is supplied via a separate wire 10, it flows counterclockwise and up through the outer windings 11 of coil 12 and down through inner windings 13 of the coil.

Thus, the currents in the adjacent windings 9 and 13 of the respective coils flow in the same, i. e., downward, direction. This causes inner...