Location scale and optical reading sensor for reading the location scale
US5539993A · kind A · utility
25Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Oct 7, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34792
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A location scale and an optical reading sensor for reading the location scale. The location scale comprises bars with a first edge and a second edge, wherein either the first edges or the second edges are located at regular intervals to form an incremental scale. To provide both incremental data and absolute data on the same scale, the bars are of at least two different widths, and any n successive bars on the scale form a unique individual code indicating the absolute location of those n bars on the scale.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.