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Magnetoresistive Compound Resonators

IP.com Disclosure Number: IPCOM000095073D
Original Publication Date: 1965-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 21K

Publishing Venue

IBM

Related People

Preisinger, M: AUTHOR

Abstract

In this magnetostrictive compound resonator, primary resonator 1 is magnetostrictively excited through coil 4. Secondary resonator 2 is mechanically excited by resonator 1. Motional amplitude is obtained essentially at the expense of the moving face of resonator 2. The mechanical transformation effective in the process is frequently chosen according to such aspects as the load on resonator 2, the desired impact strength, and the like.

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Magnetoresistive Compound Resonators

In this magnetostrictive compound resonator, primary resonator 1 is magnetostrictively excited through coil 4. Secondary resonator 2 is mechanically excited by resonator 1. Motional amplitude is obtained essentially at the expense of the moving face of resonator 2. The mechanical transformation effective in the process is frequently chosen according to such aspects as the load on resonator 2, the desired impact strength, and the like.

Here a transformation with a maximum motional amplitude is obtained out of a given available energy. Transformations take place at two points in a compound resonator. The first point is at the location of the abrupt change in cross-section between resonators 1 and 2. The second point is within resonator 2 in accordance with the shape and degree of the reduction in cross-section.

It is desired to achieve a maximum motional amplitude with a given energy. The transformation combination comprises cylindrical resonator 1 and a constant stress resonator serves as resonator 2. The entire change in cross-section available for transformation is distributed so that the reduction in cross-section is 40% at resonator 2. The rest of the transformation is performed as a pure cross- section transformation at discontinuity 3. The drawing shows the conditions in a half-wave resonator.

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