Marking device for use with inductive measuring sensor
US4639547A · kind A · utility
18Cited by
2References
11Claims
0Family size
Inventors
Key dates
| Filing date | Oct 2, 1985 |
| Grant date | Jan 27, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03543
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A marking device for marking a sheet mounted on a digitizer board includes a measuring coil inductively coupled to the digitizer board when the coil is operatively positioned relative to the board. A switch on the marking device is operable to cause current pulses to be applied to the conductors on the digitizer board producing magnetic flux which couples the conductors on the board to the coil. A marker on the marking device is responsive to operation of the switch for marking a thermosensitive sheet on which the measuring coil is placed thereby marking on the sheet the position of the marking device when the switch was closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.