US4918268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc-rotating magnetic blast coil for the contact element of an electric switch
Assignee: Alstom SA
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Filing: 1988-09-22
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Granted: 1990-04-17
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Expires: 2008-09-22
Abstract
Abstract An arc-rotating magnetic blast coil for the contact element of an electric switch, the coil comprising, in particular, a conducting cup (1) which is cylindrical in shape and which is connected to a current inlet (33), a winding (23) disposed inside the cup to produce a magnetic field along the axis of the cup and having one end (14) connected to the cup, a conducting core (7) connected to the other end (12) of the winding and situated in the center of the winding, and a fixed circuit-breaking contact disposed ahead of the coil relative to said cup within the magnetic field produced thereby and electrically connected to said core, characterized in that the winding is constituted by means of a flat conductor (8) comprising a plurality of turns wound on the core together with an insulating sheet, and in that means (16, 9) are provided for putting the winding under compression.
Inventors
- 👤 Daniel Pothieux
- 👤 Bernard Gallix
- 👤 Julien Llorens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:03
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/18; H01H33/185
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
An arc-rotating magnetic blast coil for the contact element of an electric switch, the coil comprising, in particular, a conducting cup which is cylindrical in shape and which is connected to a current inlet, a winding disposed inside the cup to produce a magnetic field along the axis of the cup and having one end connected to the cup, a conducting core connected to the other end of the winding and situated in the center of the winding, and a fixed circuit-breaking contact disposed ahead of the coil relative to said cup within the magnetic field produced thereby and electrically connected to said core, wherein the winding is constituted by means of a flat conductor comprising a plurality of turns wound on the core together with an insulating sheet, and wherein means are provided for putting the winding under compression.
Claim 2
Dependent Claim
140 words
An arc-rotating magnetic blast coil for the contact element of an electric switch, the coil comprising, in particular, a conducting cup which is cylindrical in shape and which is connected to a current inlet, a winding disposed inside the cup to produce a magnetic field along the axis of the cup and having one end connected to the cup, a conducting core connected to the other end of the winding and situated in the center of the winding, and a fixed circuit-breaking contact disposed ahead of the coil relative to said cup within the magnetic field produced thereby and electrically connected to said core, wherein the winding is constituted by means of a flat conductor comprising a plurality of turns wound on the core together with an insulating sheet, and wherein means are provided for putting the winding under compression.
Claim 3
Dependent Claim
37 words
A magnetic blast coil according to claim 1, wherein the core is provided with an axial slot in which a key is inserted for the purpose of electrically connecting the end of the conductor to the core.
Claim 4
Dependent Claim
42 words
A magnetic blast coil according to claim 2, wherein the conductor of the winding begins with a non-insulated portion inserted into the slot of the core and clamped between the core and the key, thereby electrically connecting the winding to the core.
Claim 5
Dependent Claim
22 words
A magnetic blast coil according to claim 1, wherein the insulating sheet is made of glass fiber impregnated with a hardenable resin.
Claim 6
Dependent Claim
17 words
A magnetic blast coil according to claim 1, wherein the winding is surrounded by a split ring.
Claim 7
Dependent Claim
31 words
A magnetic blast coil according to claim 5, wherein the conductor of the winding extends, without insulation, through the split in the split ring and is wound over the split ring.
Claim 8
Dependent Claim
19 words
A magnetic blast coil according to claim 5, wherein the winding and its ring are compressed inside said cup.
Claim 9
Dependent Claim
17 words
A magnetic blast coil according to claim 1, wherein said conducting cup includes an internal magnetic cup.
Claim 10
Dependent Claim
15 words
A magnetic blast coil according to claim 7, wherein the core is made of steel.
Claim 11
Dependent Claim
35 words
A magnetic blast coil according to claim 9, wherein the core is fixed to the base of the cup by means of a screw with insulation being provided where the screw passes through the cup.
Claim 12
Dependent Claim
31 words
A magnetic blast coil according to claim 10, wherein said circuit-breaking contact comprises a conducting disk carried by the core and electrically and mechanically connected to the core by the screw.
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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |