Clip-mounted quartz tube electric heater
US4531047A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1982 |
| Grant date | Jul 23, 1985 |
| Priority date | — |
| Expiry date | Jul 28, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/44
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric heater has an elongated cylindrical quartz tube provided at each end with a terminal and a heater coil having one end connected at each terminal has a helical portion disposed within the tube and extending the length thereof. A ceramic support disposed in the tube extends the length of the helical portion of the coil and is formed with a heat-reflecting longitudinal groove having mutually inclined opposing sides which flank at least a portion of the circumference of the turns of the helical portion. Each of the opposing sides of the groove engage the turns of the helix tangentially in point contact, the support holding the helical portion with the turns thereof in tangential point contact with the inner surface of the tube. Each turn of the helical portion is supported at three separate points.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.