Cartridge heater with improved thermocouple
US4010351A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1976 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Mar 18, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/82
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cartridge heater with improved thermocouple comprising a tubular metal sheath with a front end, a metal plug closing the front end, a filler of dielectric material in the sheath rearward of the plug and an elongate resistance wire supported by the filler, said plug having a pair of spaced axially extending through holes, elongate insulating tubes with front and rear ends and engaged in said holes with their front ends spaced predetermined limited distances from the open front ends of the holes, a pair of elongate thermocouple wires with front end portions engaged through the sleeves and projecting forwardly therefrom and rear portions supported in said filler and projecting rearwardly through and from the sheath and metal deposits in the forward position of the holes in the plug in sealing engagement therewith and in heat conducting contact with the thermocouple wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.