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Maximizing Gain of a Sonic Delay Line

IP.com Disclosure Number: IPCOM000095775D
Original Publication Date: 1964-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Riley, JV: AUTHOR

Abstract

The gain of a sonic delay line having magnetostrictive tape transducers is maximized by adjusting the tension of the tapes to a predetermined optimum value.

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Maximizing Gain of a Sonic Delay Line

The gain of a sonic delay line having magnetostrictive tape transducers is maximized by adjusting the tension of the tapes to a predetermined optimum value.

Nickel tapes 10 and 11 are secured to diametrically opposite points at one end of helically wound delay line wire 13. Bracket 14 supports the wire and also bobbin block 15 containing bias magnet 16 and coils 17 through which the tapes extend. The free ends of tapes 10 and 11 project into damping material 18 mounted in channel 19 formed in bracket 14. Energizing coils 17 causes one tape to expand and the other to contract, thus causing a torsional stress wave to be developed in wire 13.

The gain is controlled or maximized by adjusting the tension of tapes 10 and 11 upon assembly to a predetermined optimum value. The temperature sensitivity of the gain is decreased with tension. Furthermore, torch annealing the nickel tapes is superior to current annealing in order to maximize the gain.

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