Patent US3564176A successfully refreshed from Google Patents.
US3564176A
Expired / Lapsed
US
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Magnetic electric arcing extinction device
Assignee: Telemecanique SA
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Filing: 1968-08-23
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Granted: 1971-02-16
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Expires: 1988-08-23
Abstract
Abstract An arc extinction device has a U-shaped magnetic member formed of flat strip folded about lines parallel to the width of the strip, and each limb is slotted along its length to provide second limb portions reversely directed towards the base of the U without meeting the latter.
Inventors
- 👤 Louis J M Fechant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:03
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/12; H01H1/14; H01H1/20; H01H9/00; H01H9/30; H01H9/44; H01H9/446
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
An arc extinction device which comprises a fixed and a moving contact member; a substantially U-shaped member of flat-section ferromagnetic material arranged with its width parallel to the direction of movement of the moving contact, the member having a base portion and a pair of limbs each formed to define a corresponding first limb portion, which first limb portions together with the base portion surround the moving contact throughout its range of movement, and second limb portion each of which is coplanar with its associated first limb portion and extends from the free end of the latter towards the base portion, which second limb portions are arranged at the level of the fixed contact; a horn on the fixed contact extending towards the base portion of the U-shaped member, and at least one extinction element located between the moving contact and the base of the Ushaped member, parallel to the latter.
Claim 2
Dependent Claim
151 words
An arc extinction device which comprises a fixed and a moving contact member; a substantially U-shaped member of flat-section ferromagnetic material arranged with its width parallel to the direction of movement of the moving contact, the member having a base portion and a pair of limbs each formed to define a corresponding first limb portion, which first limb portions together with the base portion surround the moving contact throughout its range of movement, and second limb portion each of which is coplanar with its associated first limb portion and extends from the free end of the latter towards the base portion, which second limb portions are arranged at the level of the fixed contact; a horn on the fixed contact extending towards the base portion of the U-shaped member, and at least one extinction element located between the moving contact and the base of the Ushaped member, parallel to the latter.
Claim 3
Dependent Claim
27 words
An arc extinction device as claimed in claim 1 in which said at least one extinction element is a ferromagnetic, electrically conductive fin with notched marginal regions.
Claim 4
Dependent Claim
58 words
An arc extinction device as claimed in claim 1 in which said U-shaped member comprises a cut and bent sheet-metal element in which each limb is of generally U-shaped configuration, said configuration being achieved by the provision of a longitudinal slit in said limb and by omission of the corresponding portion of said base of said U-shaped member.
Claim 5
Dependent Claim
36 words
An arc extinction device as claimed in claim 3 in which said slit is oblique and extends towards an open end in the direction of operating movement of said moving contact away from said fixed contact.
Claim 6
Dependent Claim
25 words
An arc extinction device as claimed in claim 1 in which a common surface constituted by said fixed contact member and said horn is continuous.
Claim 7
Dependent Claim
15 words
An arc extinction device as claimed in claim 5 in which said surface is planar.
Claim 8
Dependent Claim
42 words
An arc extinction device as claimed in claim 1 in which said moving contact member includes a free end portion facing said base portion of said U-shaped member and said free end portion is bordered by a clamp fabricated of refractory metal.
Claim 9
Dependent Claim
32 words
An arc extinction device as claimed in claim 7 in which said clamp comprises a receding portion which covers a joint between said moving contact member and a contact element carried thereon.
Claim 10
Dependent Claim
43 words
An arc extinction device as claimed in claim 7 in which said moving contact member is a bridge contact biased by a leaf spring and said clamp includes an edge portion raised above the level of a corresponding end of said leaf spring.
Claim 11
Dependent Claim
26 words
An arc extinction device as claimed in claim 1 in which said U-shaped member of flat-section ferromagnetic material is constituted by two substantially symmetrical, juxtaposed parts.
References Cited (Backward Citations)
US2428254A
Cited
US2898427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |