Marking system using elastic surface waves
US4393268A · kind A · utility
12Cited by
2References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1981 |
| Grant date | Jul 12, 1983 |
| Priority date | — |
| Expiry date | May 19, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.