Digitizing graphic system using magnetostrictive transducers

Details Digitizing graphic system using magnetostrictive transducers Digitizing graphic system using magnetostrictive transducers

1974-07-12

1976-05-11

Sloyan, Thomas J.

Telegraphy

Systems

Position coordinate determination for writing

33 1M, 340347AD, G08C 2100

Patent

active

039565882

ABSTRACT:
A digitizing graphic system including a digitizing area, first and second coordinate arms extendable over the area, first and second magnetostrictive elements each positioned respectively in the first and second coordinate arms. A positionable device is movable with respect to the first and second arms on the area, each of the magnetostrictive elements having associated therewith a sending device and a receiving device. An energizing system is coupled to each of the sending devices for inducing magnetostrictively a strain wave longitudinally propagating along the magnetostrictive element to the respective receiving means. A digitizing system is coupled to each of the sending and receiving devices for digitizing the time duration of the strain wave propagation, the positionable device coupled to each of the coordinate arms for varying the propagating distance along each of the magnetostrictive elements in accordance with the position of the positionable device.

REFERENCES:
patent: 3016498 (1962-01-01), Powell
patent: 3022501 (1962-02-01), Seigle
patent: 3347986 (1967-10-01), Gilbert
patent: 3379834 (1968-04-01), Conners
patent: 3475705 (1969-10-01), Lindemann
patent: 3561125 (1971-02-01), Zeidler
patent: 3648277 (1972-03-01), Whetstone et al.
patent: 3665102 (1972-05-01), Townsend et al.
patent: 3801733 (1974-04-01), Bailey
patent: 3846580 (1974-11-01), Brenner
Renwick, "Digital Storage Systems," J. Wiley & Sons, Inc. 1964, pp. 21-24.

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