Marking system using elastic surface waves

Details Marking system using elastic surface waves Marking system using elastic surface waves

1981-05-19

1983-07-12

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

434416, G08C 2100

Patent

active

043932681

ABSTRACT:
The invention relates to data acquisition devices making it possible, by the use of elastic surface waves, to mark the coordinates of a stylus (7) making a line on the surface (2) of a piezoelectric plate (1).
The invention relates to a device in which the measuring surface (2) is provided with roughnesses or unevennesses of negligible size compared with the wavelength of the surface waves. The stylus (7) also comprises a member (8) for supplying a marking substance (10).
The invention is more particularly applicable to the remote transmission of graphic symbols and to the processing of digital data representing such symbols.

REFERENCES:
patent: 3684828 (1972-08-01), Maher
patent: 3806642 (1974-04-01), Veoth et al.

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