Resistor adapted for use in forced ventilation dynamic braking applications
US6081183A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1998 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Apr 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01C1/084
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A continuous ribbon resistor element having a plurality of conjunctive lengths alternately connected by reflexes is supported in a frame comprised of silicon bonded laminated mica. The ribbon elements are formed with a single, flat convolution center offset to one side of an original plane and lateral portions offset to an opposite side of the plane, joined to the center offset by transition portions such that the centroid for any transverse cross section lies on the original plane. The offsets originate at flat end portions near the reflexes and have maximum offset intermediate the ends. Metal members are received in openings of the laminated mica insulators to receive threaded fasteners when attaching an insulator in edge-wise relationship to another. Thermally conductive termination connections are brought outside the frame and airflow passageway to remove from the passageway the additional heat otherwise absorbed by the terminals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.