Industrial dishwasher monitor/controller with speech capability
US4509543A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1983 |
| Grant date | Apr 9, 1985 |
| Priority date | — |
| Expiry date | Sep 12, 2003 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L2501/26
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A dishwasher monitor/controller for monitoring the operation of a dishwasher and providing human-intelligible speech messages upon the detection of predefined fault conditions. The operation of the dishwasher is periodically monitored using temperature measurements, water conductivity measurements, detection of the absence of drying agent, and timers to measure how long various physical conditions continue between periodic maintenance procedures. The dishwasher faults detected include directly tested faults and indirectly (elapsed-time dependent) tested faults. The direct tests for faults are for low rinse water temperature, low wash water temperature, and absence of drying agent. The indirect tests are for dirty wash water, absence of detergent, and the need to inspect the interior of the washer for dirt and calcium carbonate scale build-up. Furthermore, there is provided a switch activated facility for orally explaining, step-by-step, how to properly start-up the dishwasher and how to shut it down.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.