Slide rheostat
US4504818A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1983 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | Aug 30, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C10/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a slide rheostat with first and second light sources wherein at least one set of resistor and collector is printed on an insulating base plate so as to establish a variable resistance, and wherein the first and second light sources are disposed so as to display the resistance in either of their emission colors, the light sources being connected to a common lead and at least one power supply lead so as to be energized; the improvement comprising the fact that the power supply lead is formed with a portion adopted to accommodate the sliders energizing both of the light sources so as to emit light in the composite color of their emission colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.