Polarity indicator for battery charger
US4145648A · kind A · utility
21Cited by
11References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Jun 27, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A polarity indicating system using a light emitting diode is mounted on the clip for a battery charger to provide an indication that the battery charger is properly connected to the battery being charged. In the preferred embodiment, the LED is connected to a test probe mounted in one of the handles of the negative clip and connected in series between the test probe and the positive cable. An alternate embodiment uses the polarity indicating system on battery booster cables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.