Duty cycle shared proportional temperature control
US4160153A · kind A · utility
22Cited by
11References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1977 |
| Grant date | Jul 3, 1979 |
| Priority date | — |
| Expiry date | Jun 24, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/222
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system having two heaters, such as a photographic processor with a solution heater and a dryer heater, has proportional controllers for each of the heaters. A priority control co-ordinates operation of the two controllers to give full priority to one of the two heaters during warm up, and a reduced percentage for running conditions. The other heater is allowed to share the remaining available input power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.