Dual priority temperature control
US4138607A · kind A · utility
17Cited by
4References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 1977 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Jun 24, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S20/244
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature control system controls operation of two heaters, such as the solution heater and dryer heater of a photographic processor. First and second temperature detectors sense temperature and provide first and second detector signals, which are compared with first and second reference ramp signals by first and second comparators. The comparators produce first and second inhibit signals, which prevent power from being supplied to the first and second heaters, respectively. A priority circuit prevents power from being supplied to the second heater if the first heater is receiving power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.