Interposer control for electronic postage meter
US4302821A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1979 |
| Grant date | Nov 24, 1981 |
| Priority date | — |
| Expiry date | Oct 30, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00548
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic postal meter, adapted to be driven by a meter base has a shutter for controlling the application of drive input to the meter, and a solenoid driven interposer for blocking operation of the shutter until conditions for printing postage are met. The solenoid is energized by way of a pair of serially connected transistors, which are in turn controlled by separate micro-processing systems. The separate micro-processing systems continually exchange messages concerning the operational status of the postal meter, whereby each of the controlling systems is responsive to conditions under which the postal meter should not be operative, to thereby control its respective transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.