Water heating apparatus
US4953536A · kind A · utility
9Cited by
5References
10Claims
0Family size
Inventors
Key dates
| Filing date | Jul 7, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Jul 7, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1912
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Water heating apparatus by flow of electric current through the water from a set, for example, of eight electrodes whose surface areas for current flow are proportional to the value of two raised to the eight exponents zero to seven, that is 1 to 128. This gives an area range of 1:256 which can be switched in binary digital manner automatically by solid state circuitry in response to a temperature window, electric current flow or other indicators. This gives automatic compensation for wide water conductivity ranges and flow rates without any moving parts to give a practical mass-produced industrial or domestic water heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.