Pause testing circuit for dishwasher controller
US5608769A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Sep 21, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C3/04
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A test circuit determines state of an electrical element supplied with alternating current and measures the duration of that state. The test circuit is connected to the element so that current flows to the test circuit when the element is in the state being measured. The test circuit rectifies the alternating current to periodic pulses, which are counted to determine the duration of the current and, thus, the state. The circuit is particularly useful for testing operation of a dishwasher pump motor that is interrupted periodically. The test circuit is connected to auxiliary contacts that open and close in correspondence with the operation of the pump motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.