Patent US4051452A successfully refreshed from Google Patents.
US4051452A
Expired / Lapsed
US
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Annular resistor
Assignee: Cutler Hammer Inc
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Filing: 1977-01-21
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Granted: 1977-09-27
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Expires: 1997-01-21
Abstract
Abstract An annular resistor, suitable for use in a diesel electric locomotive dynamic braking system and the like, having a supporting frame including spaced inner and outer annular frame portions and a continuous resistance ribbon having a plurality of bent-back radial extensions therebetween and in electrical isolation therefrom. U-shaped folds of the ribbon are mounted on pin supports allowing contraction and expansion of the ribbon. The pin supports are mounted to insulator blocks which may be selectively positioned on the frame, when two or more are stacked, to vary ribbon alignment and hence convective cooling. The resistor is comprised of severally replaceable identical component quadrants.
Inventors
- 👤 William R. Luy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:47
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/46; H01C10/48; H01C1/00; H01C1/08
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
119 words
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.
Claim 2
Dependent Claim
119 words
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.
Claim 3
Dependent Claim
29 words
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.
Claim 4
Dependent Claim
72 words
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.
Claim 5
Dependent Claim
69 words
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;
Claim 6
Dependent Claim
69 words
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;
Claim 7
Dependent Claim
34 words
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.
Claim 8
Dependent Claim
34 words
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.
Claim 9
Dependent Claim
29 words
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.
Claim 10
Dependent Claim
45 words
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.
Claim 11
Dependent Claim
46 words
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.
Claim 12
Dependent Claim
20 words
A resistor according to claim 6 wherein said insulator blocks are eccentrically attached to said inner and outer frame portions.
Claim 13
Dependent Claim
17 words
A resistor according to claim 6 wherein said support means is eccentrically attached to said insulator blocks.
Claim 14
Dependent Claim
25 words
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.
Claim 15
Dependent Claim
111 words
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.
Claim 16
Dependent Claim
111 words
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.
Claim 17
Dependent Claim
55 words
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.
Claim 18
Dependent Claim
48 words
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.
Claim 19
Dependent Claim
22 words
An annular resistor assembly according to claim 12 wherein said insulator blocks are eccentrically attached to said inner and outer frame members.
Claim 20
Dependent Claim
19 words
An annular resistor assembly according to claim 12 wherein said support means is eccentrically attached to said insulator blocks.
Claim 21
Dependent Claim
28 words
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.
Claim 22
Dependent Claim
26 words
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.
Claim 23
Dependent Claim
20 words
A resistor according to claim 4 wherein said U-shaped bends of said ribbon means have air turbulation means formed therein.
Claim 24
Dependent Claim
17 words
A resistor according to claim 4 wherein said segments of said ribbon means have convolutions formed therein.
Claim 25
Dependent Claim
56 words
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.
Claim 26
Dependent Claim
47 words
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.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |