Synchronous load lock-out control system for battery powered equipment
US4724332A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1985 |
| Grant date | Feb 9, 1988 |
| Priority date | — |
| Expiry date | Jun 12, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/0031
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The system includes a battery state-of-charge monitoring circuit which is operable to produce a signal change when there is a change in the battery charge from an acceptable charge to a substantially reduced charge. The signal change from the monitor is connected to control a lock-out relay to disable a control circuit for a load controller for battery powered equipment which is to be locked out. A current detecting device is connected to detect the presence of current in the control circuit of the controller and is connected to hold off the lock-out operation of the lock-out relay while current is flowing in the control circuit to thereby assure that the lock-out of the load occurs after a normal interruption of the load control circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.