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Browse Prior Art Database

High Efficiency Transducer

IP.com Disclosure Number: IPCOM000096679D
Original Publication Date: 1963-Sep-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Meier, JH: AUTHOR

Abstract

Kinetic energy can be transmitted with substantially no loss by applying and transmitting a stress pulse through a series of members of matching cross sectional impedance.

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High Efficiency Transducer

Kinetic energy can be transmitted with substantially no loss by applying and transmitting a stress pulse through a series of members of matching cross sectional impedance.

Transducer 1, moving at velocity V as in A, moves through a predetermined gap and contacts an intermediate member 2 to impart such velocity to a stationary driven member 3 as in B, by the billiard ball effect. Thus, before impact of 1, 3 is stationary and abuts 2 such as by a spring bias. After impact, 1 and 2 are stationary and 3 moves.

The elements 1, 2 and 3 can be prismatical bars provided they are of equal cross sectional impedance. The first and last elements 1 and 3 have the same longitudinal period, i. e., twice the length divided by the velocity of sound. Best results are achieved with bars of equal cross section and material, with the bars 1 and 3 being of equal length. The intermediate member can be of any length. If frictionless support is provided for all bars, there can be a plurality of intermediate bars between 1 and 3.

Thus, a plurality of electrical to mechanical transducers 1a to 1e can drive corresponding print hammers 3a... 3e. Such is through respective members 2a...2e of arbitrary length as in C. Members 2 can be fanned out, but not enough to cause appreciable dispersion of the traveling wave front, to permit use of large size energy transducers despite close spacing of the print hammers. The time of contact during impact must be the same betwee...