Temperature calibration system
US3939687A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 15, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Jul 15, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A temperature calibration system including a well for receiving a temperature sensor such as a thermometer or thermocouple, and a heater for heating the well to a desired and adjustable temperature. A single well instrument providing a temperature range of 100.degree. to 1199 .degree. F in one degree steps. A control circuit for controlling well temperature to a few tenths of a degree and including means for manually setting the desired temperature, a bridge incorporating the temperature sensor and the temperature setting resistances, amplifiers for switching power to the well heater, and a null meter for indicating when the instrument is operating at the desired temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.