Control system for inhibiting processing communications
US4399538A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Apr 30, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00701
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A control system is employed to selectively inhibit false signal transmissions between a communications processor and a plurality of peripheral devices during transient power states. The control system includes a comparator which detects a decrease in the unregulated power supply voltage as compared to the regulated voltage to anticipate an impending loss in regulated voltage. In response to a detected drop in unregulated voltage, a transistor interrupts the power supply to communications lines. Simultaneously, the transistor interrupts the power supply to a light source of an optically coupled relay which is employed to actuate a peripheral such as a mailing machine. In order to assure that the communications processor will initiallize after a transitory drop and a recovery in line voltage, a processor reset signal is also generated by the control system as a function of a detected decrease in unregulated voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.