Claims
- 1. A resistor comprising in combination:
- a supporting frame having inner and outer annular portions and portions holding them in spaced apart concentric relationship;
- insulating means attached to the opposing faces of said inner and outer annular portions;
- a reflexed resistance ribbon means having inner and outer U-shaped bends in proximity to said insulating means and segments connecting and arranged in a radial relation between said inner and outer bends;
- support means providing individual support for each of said bends with respect to said insulating means to keep said ribbon means within the annulus defined by opposing faces of said insulating means; and
- terminal means connected to said ribbon means for connecting the latter to a source of electrical current.
- 2. A resistor according to claim 1 comprising severally replaceable resistance units cumulatively comprising said resistor, each of said resistance units being independently connectable to a source of electrical current.
- 3. A resistor according to claim 1 wherein said ribbon means comprises a plurality of ribbon layers, each layer forming an annulus concentric to said inner annular frame portion, and comprising mounting means for said insulating means such that the U-shaped bends of one ribbon layer may be selectively aligned with or offset from the U-shaped bends of another ribbon layer according to orientation of said insulating means with respect to said frame.
- 4. A resistor comprising in combination:
- a supporting frame having inner and outer annular portions and portions holding them in spaced apart concentric relationship;
- insulating means attached to the opposing faces of said inner and outer annular portions;
- a reflexed resistance ribbon means having inner and outer U-shaped bends in proximity to said insulating means and segments connecting and arranged in a radial relation between said inner and outer bends;
- support means attached to said insulating means and providing individual support for each of said bends; and
- terminal means connected to said ribbon means for connecting the latter to a source of electrical current.
- 5. A resistor according to claim 4 comprising severally replaceable resistance units cumulatively comprising said resistor, each of said resistance units being independently connectable to a source of electrical current.
- 6. A resistor according to claim 4 wherein said ribbon means comprises a plurality of ribbon layers, each layer forming an annulus concentric to said inner annular frame portion, and said insulating means comprises a plurality of rows of insulator blocks, one row for each layer.
- 7. A resistor according to claim 6 comprising eccentric mounting means whereby the U-shaped bends of one ribbon layer may be selectively aligned with or offset from the U-shaped bends of another ribbon layer according to the orientation of said insulator blocks with respect to said frame.
- 8. A resistor according to claim 6 wherein said insulator blocks are eccentrically attached to said inner and outer frame portions.
- 9. A resistor according to claim 6 wherein said support means is eccentrically attached to said insulator blocks.
- 10. A resistor according to claim 4 wherein said holding portions further comprise means for adjusting the radial distance between said inner and outer annular portions.
- 11. An annular resistor assembly comprising:
- a plurality of like, arcuate inner and outer spaced frame members connected at their ends by a pair of straight members to form a segment of an annulus;
- insulators secured to the opposing faces of said inner and outer spaced frame members;
- a reflexed resistance ribbon means having inner and outer U-shaped bends in proximity to said insulators and segments connecting and arranged in a radial relation between said inner and outer bends;
- support means secured to said insulators and providing individual support for each of said bends; and
- terminal means connected to said ribbon means for connecting the latter to a source of electrical current.
- 12. An annular resistor assembly according to claim 11 wherein said ribbon means of each said resistor unit comprises a plurality of ribbon layers, each layer forming a segment of an annulus concentric to said inner arcuate frame members, and said insulating means comprises a plurality of rows of insulator blocks, one row for each layer.
- 13. An annular resistor assembly according to claim 12 comprising eccentric mounting means whereby the U-shaped bends of one ribbon layer may be selectively aligned with or offset from the U-shaped bends of another ribbon layer according to the orientation of said insulator blocks with respect to said frame.
- 14. An annular resistor assembly according to claim 12 wherein said insulator blocks are eccentrically attached to said inner and outer frame members.
- 15. An annular resistor assembly according to claim 12 wherein said support means is eccentrically attached to said insulator blocks.
- 16. An annular resistor assembly according to claim 11 wherein said straight members further comprise means for adjusting the radial distance between said inner and outer spaced frame members.
- 17. A resistor according to claim 4 further comprising air turbulators having portions conformed to and fitted over said U-shaped bends and portions extending generally transversely therefrom.
- 18. A resistor according to claim 4 wherein said U-shaped bends of said ribbon means have air turbulation means formed therein.
- 19. A resistor according to claim 4 wherein said segments of said ribbon means have convolutions formed therein.
- 20. A resistor according to claim 4 wherein said support means comprises a plurality of pins and wherein each of said U-shaped bends has one or more apertures therein for loosely receiving a corresponding pin, each of said pins having a shoulder portion wider than said aperture to keep said U-shaped bends spaced from said insulating means.
- 21. A resistor according to claim 20 wherein said insulating means comprises a plurality of insulator blocks, each block having four of said pins attached thereto, and wherein each of said U-shaped bends has two said apertures whereby each of said blocks supports two of said U-shaped bends.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation of my application, Ser. No. 605,673, filed Aug. 18, 1975 now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
Date |
Country |
Parent |
605673 |
Aug 1975 |
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