Methods of assembling open coil electrical resistance heaters involving butt welding of rails and using welded insulator support clips with bendable tabs
US6770855B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2003 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Apr 2, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B3/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A heater having a frame rail and clips, attached to the rail, for securing insulators for supporting a heater coil. Each clip has a main body having a structural member for securing to the rail, and having a pair of flanges symmetrical about a central axis. Each flange has a cut-out for supporting an insulator, the cut-out having an open end, a back abutment edge and a pair of side abutment edges. A bendable tab is located at either side of the open end, each having a first and a second position. In the first position an insulator is insertable into the cut-out, and the insulator is secured by bending the tabs to their second position. Optionally the main body has a cross-section that accommodates the cross section of the rail and the rail is welded to the channel. Alternatively, a plurality of clinching flaps extend from the main body, the flaps shaped and dimensioned for bending around and clinching the rail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.