Low voltage in-ground trunk line system
US10638228B1 · kind B1 · utility
1Cited by
4References
4Claims
0Family size
Inventor
Key dates
| Filing date | Dec 29, 2016 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Dec 29, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/028
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The system allows for distribution of 70 Volt high-voltage audio underground in direct burial cable or conduit. From the converter box the audio wires will be coming out of the earth at a safe 8 ohms (minimized shock risk). Typically the size (power output) of the amplifier alone limits how many 70 V converter boxes can have daisy chained together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.