Patent US3784775A successfully refreshed from Google Patents.
US3784775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc runner between stationary contacts
Assignee: ITE Imperial Corp
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Filing: 1972-07-27
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Granted: 1974-01-08
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Expires: 1992-07-27
Abstract
Abstract A high current capacity molded case circuit breaker having arcing and main contacts and an arc chute to receive and extinguish arcs drawn between the arcing contacts is provided with a magnetic arc runner disposed between the stationary sections of the main and arcing contacts to direct arcs that initiate at the stationary main contact onto the stationary arcing contact.
Inventors
- 👤 C Gryctko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:56
CPC Classifications
H; H01; H01H; H01H9/00; H01H9/30; H01H9/38; H01H9/383
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
A circuit breaker comprising stationary contact means including stationary arcing and main contact sections; movable contact means including movable arcing and main contact sections operable into and out of engagement with said stationary arcing and main contact sections, respectively; arc chute means to receive and extinguish electric current arcs drawn between said movable and stationary contact means upon separation thereof; said stationary main contact means being disposed outside of said arc chute; said arc chute having an entrance region; said stationary arcing contact means being positioned at said entrance region; and magnetic arc runner means positioned at said entrance region and interposed between said stationary arcing and main contact sections to transfer arcs from said stationary main contact section to said stationary arcing contact section and into said arc chute means where these arcs are extinguished.
Claim 2
Dependent Claim
136 words
A circuit breaker comprising stationary contact means including stationary arcing and main contact sections; movable contact means including movable arcing and main contact sections operable into and out of engagement with said stationary arcing and main contact sections, respectively; arc chute means to receive and extinguish electric current arcs drawn between said movable and stationary contact means upon separation thereof; said stationary main contact means being disposed outside of said arc chute; said arc chute having an entrance region; said stationary arcing contact means being positioned at said entrance region; and magnetic arc runner means positioned at said entrance region and interposed between said stationary arcing and main contact sections to transfer arcs from said stationary main contact section to said stationary arcing contact section and into said arc chute means where these arcs are extinguished.
Claim 3
Dependent Claim
52 words
A circuit breaker as set forth in claim 1 also comprising an elongated terminal strap supporting on its upper surface said stationary arcing and stationary main contact sections, with the latter being behind the arc chute means and the stationary arcing contact section; said arc chute means extending above said terminal strap.
Claim 4
Dependent Claim
22 words
A circuit breaker as set forth in claim 2 in which the arc runner means is tapered downward from rear to front.
Claim 5
Dependent Claim
30 words
A circuit breaker as set forth in claim 3 in which the arc runner means at the rear end thereof extends across substantially the entire width of the terminal strap.
Claim 6
Dependent Claim
26 words
A circuit breaker as set forth in claim 4 in which the stationary main contact section extends across substantially the entire width of the terminal strap.
Claim 7
Dependent Claim
28 words
A circuit breaker as set forth in claim 5 in which the stationary main contact section includes first and second elongated portions extending substantially across the terminal strap.
Claim 8
Dependent Claim
33 words
A circuit breaker as set forth in claim 5 in which the stationary arcing contact section is substantially narrower than said stationary main contact section, and the arcing runner is constructed of steel.
Claim 9
Dependent Claim
43 words
A circuit breaker as set forth in claim 2 also including additional magnetic arc runner means extending forward of said arcing contact means and operatively positioned to draw arcs formed beteween separable sections of said arcing contact means deeply into said arc chute.
Claim 10
Dependent Claim
39 words
A circuit breaker as set forth in claim 2 in which said magnetic arc runner means covers a substantial portion of sait terminal strap upper surface in the region thereof between said stationary arcing and stationary main contact sections.
References Cited (Backward Citations)
US3171936A
Cited
US3582966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |