Vernier control
US4223294A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1978 |
| Grant date | Sep 16, 1980 |
| Priority date | — |
| Expiry date | Oct 16, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vernier control (10) with independent coarse and fine adjustments includes a track pattern (17) that is formed along three concentric rings on a single base (11). A horseshoe-shaped, low-resistance track (17a) extends around a segment of the inner ring and has a pair of termination tracks (17d, 17e) connected to its opposite ends and extending in reverse directions in opposite half-sections of the intermediate ring. A pair of high-resistance tracks (17b, 17c) are formed in opposite half-sections of the outer ring, each extending alongside a respective termination track (17d, 17e). A fine adjustment rotor (16) is journaled in the base (11) in the center of the track pattern (17), and carries a fine adjustment contact (15) that engages both a collector terminal (19) on the base (11) and the low-resistance track (17a). An annular contact carrier (12) is mounted for rotation around the rotor (16) and carries a pair of coarse adjustment contacts (13 ). Each coarse adjustment contact (13) electrically connects one of the termination tracks (17d, 17e) to its adjacent high-resistance track (17b, 17c). A control of this type may be employed in television sets for brightness, color and con…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.