Remote controlled mechanical release or lock-in electrical path between battery and a load
US4039903A · kind A · utility
Inventor
Key dates
| Filing date | Feb 18, 1975 |
| Grant date | Aug 2, 1977 |
| Priority date | — |
| Expiry date | Feb 18, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H83/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention in a vehicle senses battery voltage level when the key is in the `off` position and disconnects the battery if its voltage level falls to a predetermined voltage. This level permits restarting of the vehicle although the lights have been inadvertently left on or a short has occurred. It provides for a unique remote controlled mechanical lock-in of the electrical current path from the battery to a load and a mechanical lock-out on the voltage sensing interrupting circuit when the ignition switch is in `on` position and the reestablishment of the voltage level control to magnetically provide the electrical current path from the battery to the load when the ignition switch is returned to `off` position thus obligating the voltage level control circuit to retain the path from the battery to the load until the battery decays to a predetermined level. This discontinues the current to the load. By returning the ignition switch to `on` the electrical current path is reestablished.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.