Safety circuits for electric heating element
US11089655B1 · kind B1 · utility
0Cited by
3References
8Claims
0Family size
Inventor
Key dates
| Filing date | Dec 10, 2019 |
| Grant date | Aug 10, 2021 |
| Priority date | — |
| Expiry date | Jan 16, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/25252
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system controller such as a microprocessor receives voltage signals produced from a resistor identifying the functional or nonfunctional operating state of a power switch which controls the amount of power provided to a load in an electrical system. The resistor is also used to provide voltage signals representing the temperature of a heating element of the type used in heating pads and heating blankets. The functional or nonfunctional operating state of a safety switch in a safety circuit capable of blowing a fuse and cutting power to the load is periodically tested to ensure the safety of the electrical system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.