Tapped variable potentiometer resistor with current sense and safety circuit
US5812411A · kind A · utility
6Cited by
8References
11Claims
0Family size
Inventors
Key dates
| Filing date | Jan 28, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jan 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/23057
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic selector knob circuit (10) which uses a tapped potentiometer (POT1) to provide accurate operation without requiring factory calibration. The potentiometer (POT1) is calibrated through on-board circuitry which includes a tap voltage biasing device and which monitors operation on a continual basis through both a current monitor (16) and a voltage monitor (18). A redundant disable circuit (14) provides a redundant hardware means for shutting off all oven heating elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.