Electronic micro-controller conversion module for step by step switching apparatus
US4633042A · kind A · utility
1Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1984 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | Jul 26, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An improved step-by-step switch assembly includes an electronic controller conversion module. A programmed microprocessor responds to incoming pulse trains of widely variant make and break ratios and generates precisely timed and shaped pulses to operate vertical, rotary and release magnets of the switch assembly. Other features include increased loop sensitivity, selective digit absorption and automatic periodic contact wiping to clean all of the contacts of the assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.