Patent US3728503A successfully refreshed from Google Patents.
US3728503A
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Shock-proof arc chute for high voltage circuit breaker with metallic arc plates having off-set lines of openings
Assignee: ABB Inc USA
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Filing: 1971-01-22
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Granted: 1973-04-17
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Expires: 1991-01-22
Abstract
Abstract An arc chute is provided for use in high voltage circuits which uses a plurality of spaced metallic plates spaced by fiber spacers. The fiber spacer plates have alternately displaced, laterally extending slots, which extend above the tops of the metallic plates, to define a sinuous chamber above the top of the metal plates which encourages arc product turbulence between spaced metal plates and above the top of the metal plates. Each metal plate has a longitudinally extending series of spaced holes displaced from the center of the plate, with the series of holes of adjacent plates being alternately laterally displaced.
Inventors
- 👤 C Clausing
- 👤 F Pokorny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:52
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
220 words
An arc chute for a high voltage circuit breaker which is rated at a voltage greater than one thousand volts; said arc chute comprising a plurality of alternately disposed metal plates and insulation spacer plates; each of said metal plates being comprised of a relatively thin, generally elongated member having a V-shaped slot extending from an apex disposed generally centrally in said plate to a bottom edge thereof, the tops of said metal plates being aligned with one another; each of said insulation plates being comprised of a relatively thin, generally rectangular unitary elongated member having a U-shaped slot therein extending from an upper continuous base region to an open bottom edge; the tops of said insulation plates being aligned with one another and extending beyond said tops of said metal plates; said upper base region of said U-shaped slot in each of said insulation plates being disposed above said top of said metal plates, whereby the spaces between adjacent metal plates communicate with one another above the said top of said metal plates through said U-shaped slots in said insulation plates; said metal plates being held in surface-to-surface contact with said insulation plates; the legs defined by said V-shaped slot in said metal plates being substantially coextensive with the legs defined by said U-shaped slot in said insulation plate.
Claim 2
Dependent Claim
220 words
An arc chute for a high voltage circuit breaker which is rated at a voltage greater than one thousand volts; said arc chute comprising a plurality of alternately disposed metal plates and insulation spacer plates; each of said metal plates being comprised of a relatively thin, generally elongated member having a V-shaped slot extending from an apex disposed generally centrally in said plate to a bottom edge thereof, the tops of said metal plates being aligned with one another; each of said insulation plates being comprised of a relatively thin, generally rectangular unitary elongated member having a U-shaped slot therein extending from an upper continuous base region to an open bottom edge; the tops of said insulation plates being aligned with one another and extending beyond said tops of said metal plates; said upper base region of said U-shaped slot in each of said insulation plates being disposed above said top of said metal plates, whereby the spaces between adjacent metal plates communicate with one another above the said top of said metal plates through said U-shaped slots in said insulation plates; said metal plates being held in surface-to-surface contact with said insulation plates; the legs defined by said V-shaped slot in said metal plates being substantially coextensive with the legs defined by said U-shaped slot in said insulation plate.
Claim 3
Dependent Claim
214 words
An arc chute for a high voltage circuit breaker which is rated at a voltage greater than one thousand volts; said arc chute comprising a plurality of alternately disposed metal plates and insulation spacer plates; each of said metal plates being comprised of a relatively thin, generally elongated member having a slot extending from an apex disposed generally centrally in said plate to a bottom edge thereof, the tops of said metal plates being alignEd with one another; each of said insulation plates being comprised of a relatively thin, generally rectangular unitary elongated member having a slot therein extending from an upper continuous base region to an open bottom edge; the tops of said insulation plates being aligned with one another and extending beyond said tops of said metal plates; said upper base region of said slot in each of said insulation plates being disposed above said top of said metal plates, whereby the spaces between adjacent metal plates communicate with one another above the said top of said metal plates through said slots in said insulation plates; said metal plates being held in surface-to-surface contact with said insulation plates; the legs defined by said slot in said metal plates being substantially coextensive with the legs defined by said slot in said insulation plate.
Claim 4
Dependent Claim
214 words
An arc chute for a high voltage circuit breaker which is rated at a voltage greater than one thousand volts; said arc chute comprising a plurality of alternately disposed metal plates and insulation spacer plates; each of said metal plates being comprised of a relatively thin, generally elongated member having a slot extending from an apex disposed generally centrally in said plate to a bottom edge thereof, the tops of said metal plates being alignEd with one another; each of said insulation plates being comprised of a relatively thin, generally rectangular unitary elongated member having a slot therein extending from an upper continuous base region to an open bottom edge; the tops of said insulation plates being aligned with one another and extending beyond said tops of said metal plates; said upper base region of said slot in each of said insulation plates being disposed above said top of said metal plates, whereby the spaces between adjacent metal plates communicate with one another above the said top of said metal plates through said slots in said insulation plates; said metal plates being held in surface-to-surface contact with said insulation plates; the legs defined by said slot in said metal plates being substantially coextensive with the legs defined by said slot in said insulation plate.
Claim 5
Dependent Claim
27 words
The arc chute of claim 1 wherein said metal plates are each identical to one another, and wherein said insulation plates are each identical to one another.
Claim 6
Dependent Claim
49 words
The arc chute of claim 2 wherein said slots in said insulation plates have laterally extending straight portions extending to one side of each of said plates in a region adjacent the said top of said plates; said laterally extending portions of adjacent insulation plates extending in opposite directions.
Claim 7
Dependent Claim
37 words
The arc chute of claim 4 wherein all portions of said slots in said insulation plates are on one side of the longitudinal center of said insulation plates at regions above the top of said metal plates.
Claim 8
Dependent Claim
29 words
The arc chute of claim 4 wherein said slots in said insulation plates have generally U shapes and wherein said slots in said metal plates have generally V shapes.
Claim 9
Dependent Claim
29 words
The arc chute of claim 2 wherein said metal plates each contain a line of spaced openings extending parallel to the longitudinal center line of each of said plates.
Claim 10
Dependent Claim
53 words
The arc chute of claim 7 wherein each of said lines of spaced openings is laterally displaced from said longitudinal center line of said metal plates; said lines of openings of each of said plates being displaced to a side opposite from that of the line of openings of an adjacent metal plate.
Claim 11
Dependent Claim
77 words
The arc chute of claim 6 wherein said metal plates each contain a line of spaced openings extending parallel to the longitudinal center line of each of said plates and wherein each of said lines of spaced openings is laterally displaced from said longitudinal center line of said metal plates; said lines of openings of each of said plates being displaced to a side opposite from that of the line of openings of an adjacent metal plate.
Claim 12
Dependent Claim
35 words
The arc chute of claim 3 wherein each of said insulation plates contains aligned protrusion means disposed above the top of said metal plates to prevent the warpage of said insulation plates toward one another.
Claim 13
Dependent Claim
35 words
The arc chute of claim 9 wherein each of said insulation plates contains aligned protrusion means disposed above the top of said metal plates to prevent the warpage of said insulation plates toward one another.
Claim 14
Dependent Claim
92 words
The arc chute of claim 11 which further includes first notch means on a side of said insulation plates which is exposed to view in the assemblage of plates, and which further includes second notch means on a side of said metal plates which is exposed to view in the assemblage of plates; said first and second notch means being disposed away from the longitudinal center of said insulation and metal plates, and visually indicating the spacial relation of said laterally displaced openings and of said laterally extending portions of said slots.
References Cited (Backward Citations)
US1868442A
Cited
US2140360A
Cited
US2147419A
Cited
US2215797A
Cited
US2616006A
Cited
US2584570A
Cited
US2769066A
Cited
US3192348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |