Test piece coloration comparative decision unit
US5160979A · kind A · utility
2Cited by
3References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 8, 1991 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | Feb 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/2202
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is provided for making color comparisons between a test sample and a plurality of color samples. The color samples are arranged on a circle on a rotatable member and are successively moved into position adjacent a test sample. When an operator determines that a color sample adjacent the test sample is closest in color to the test sample he operates a switch which causes a stored numerical value associated with that sample to be read out and displayed on a display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.