Electronic postage meter operating voltage variation sensing system
US4285050A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1979 |
| Grant date | Aug 18, 1981 |
| Priority date | — |
| Expiry date | Oct 30, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00346
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic postage meter includes an operating voltage variation sensing system. Protection is provided for preserving postage accounting information stored in the meter if the operating power for the meter fails. Control circuits are connected to the accounting circuit and to circuitry providing signal information representative of the power condition. The control circuit operates to maintain the accounting circuit in either an operative or inoperative state. The control circuits can be set to bring the accounting circuit from the inoperative state only when the signal information reflects a sufficient power condition. Once set to maintain the accounting circuit in the operative state, the control circuits continue to maintain the accounting circuit operative, independent of signal information reflecting a power failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.