Compact column gage
US4197650A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 1978 |
| Grant date | Apr 15, 1980 |
| Priority date | — |
| Expiry date | Aug 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R13/405
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A part sizing system in which the upper and lower tolerance limits are illuminated on the same bar graph display. Electrical representations of the upper and lower tolerance limits are alternately coupled to the bar graph display so as to superimpose visual indications of both limits on one another, with each limit being distinguishable from each other by different light intensities. In one embodiment this bar graph display is disposed adjacent another bar graph display in the same housing. The other bar graph display is utilized to provide a visual indication of the output of at least one variable reluctance transducer which measures the size of the part under test. Improved transducer excitation circuitry is also provided for insuring accurate measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.