Data input pen for Signature Verification
US4513437A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1982 |
| Grant date | Apr 23, 1985 |
| Priority date | — |
| Expiry date | Jun 30, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/35
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A writing implement having special applicability for use as a pressure and acceleration sensitive element for use in a Signature Verification System. The pen structure includes both a writing implement for making a visible record and also includes unique transducer structures for providing both acceleration and pressure data to a remotely located verification system. The pressure sensing element is axially mounted within the pen and produces pressure signals due to axial pressure on the pen tip as an individual writes. The accelerometer structure comprises a hollow tubular piezoelectric member supported at one end and having four circumferentially disposed electrodes on the outer surface thereof, which are appropriately interconnected to produce two orthogonal acceleration component signals A.sub.x and A.sub.y.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.