Modular switching system
US4176251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1978 |
| Grant date | Nov 27, 1979 |
| Priority date | — |
| Expiry date | May 15, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H60/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A modular switching system including a plurality of switch modules connected in cascade. Each module includes a portion of a signal bus, terminals for connection of an external device, switch means for connecting the external device to the signal bus and an addressable logic circuit. An external device can be connected to the signal bus by providing to the logic circuit cascade a number of address pulses corresponding to the position in the cascade of the selected external device. By providing a number of such cascades an entire system, for example an audio system, can be formed. The system can be expanded simply by connecting additional switch modules to each or any cascade and an external device connected thereto is automatically addressable according to its position in the cascade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.