Vehicle dispatch indicator with color-coded, alphabetical and numerical indicia
US3996681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1974 |
| Grant date | Dec 14, 1976 |
| Priority date | — |
| Expiry date | Aug 8, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F7/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-dial, manually operable indicator employing color-coded, alphabetical and numerical indicia which are indicative of railway or road vehicle destinations, regardless of whether they may be local or outbound, major or minor vehicle defects requiring repair, other varied information requiring matching of indicia for proper vehicle selection, and other indicia affording useful information to the driver of the associated vehicle or highway or railway personnel. A novel clutch mechanism which is effective under the control of a single knob affords selective dial rotation while other manually operable knobs effect pointer operations indicative of the condition of special vehicle equipment such as refrigeration apparatus or the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.