Process for making a joint between two metal wires and a differential thermocouple
US4415758A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1980 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Nov 4, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T3/006
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Process for producing a joint between two metal wires for use in the construction of thermocouples or neutron flux probes or sensors having a small external diameter is disclosed. A stack is formed from two wires placed end to end and having an interface. This stack is placed in a tube which is sealed at both ends. The tube is made from a material, whose thermal expansion coefficient is well below that of the two wires. Spacers or shims are placed between the free ends of both wires. The assembly is exposed to a temperature such that the two contacting ends of the wires are welded under the action of the difference in the elongations of the tube and the wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.