Patent US5218671A successfully refreshed from Google Patents.
Patent US3708740A successfully refreshed from Google Patents.
US3708740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for producing a large direct-current potential difference
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1972-01-04
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Granted: 1973-01-02
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Expires: 1992-01-04
Abstract
Abstract The device comprises at least one conductive rod forming a transfer winding supplied from an alternating-current source and cells arranged in tiers along each rod and each consisting of a closet magnetic-circuit body surrounding each rod, a secondary winding inductively coupled to the transfer winding and a rectifier. Each cell constitutes a module comprising a support plate having a set of aligned holes through which the conductive rod or rods are passed.
Inventors
- 👤 A Pierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:10
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/18; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02M7/10; Y; Y10; Y10S; Y10S257/00; Y10S257/909
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
150 words
A device for producing a large direct-current potential difference from an alternating-current source, comprising: a transfer winding supplied by said source; and a plurality of cells each comprising a secondary winding coupled inductively to said transfer winding and a rectifier circuit supplied by said secondary winding, the outputs of the rectifiers of said cells being placed in series, wherein said device comprises at least one conductive rod forming said transfer winding and connected to a low-voltage alternating-current supply, said cells being arranged in tiers along the conductive rod or each conductive rod and each cell being provided with a closed magnetic-circuit body around each rod, said secondary winding having a large number of turns and mounted on said magnetic-circuit body, and wherein each cell constitutes a module comprising a support plate provided with a set of aligned perforations through which the primary conductive rod or rods are permitted to pass.
Claim 2
Independent Claim
150 words
A device for producing a large direct-current potential difference from an alternating-current source, comprising: a transfer winding supplied by said source; and a plurality of cells each comprising a secondary winding coupled inductively to said transfer winding and a rectifier circuit supplied by said secondary winding, the outputs of the rectifiers of said cells being placed in series, wherein said device comprises at least one conductive rod forming said transfer winding and connected to a low-voltage alternating-current supply, said cells being arranged in tiers along the conductive rod or each conductive rod and each cell being provided with a closed magnetic-circuit body around each rod, said secondary winding having a large number of turns and mounted on said magnetic-circuit body, and wherein each cell constitutes a module comprising a support plate provided with a set of aligned perforations through which the primary conductive rod or rods are permitted to pass.
Claim 3
Dependent Claim
115 words
A device according to claim 1, wherein the rod or each rod has a hairpin shape and is provided with an electric insulator and wherein each plate is provided with a second set of perforations for the insertion of rods which serve to align the plates and are isolated therefrom, and wherein provision is made for compression means whereby said support plates which are separated by isolating spacer members are clamped together and against a base support fitted with leak-tight lead-in bushings for the ends of each arm of one conductive rod, said base support being such as to constitute the bottom of a tank which surrounds the cells and contains an electrically insulating gas.
Claim 4
Dependent Claim
135 words
A device according to claim 1, wherein said device comprises two conductive rods provided with an electrical insulator and shaped so as to form an open loop with two arms each having a free extremity, two free extremities each forming part of one loop being connected to each other and to one of the poles of a three-phase low-voltage supply whilst the two other poles thereof are connected respectively to the two remaining free extremities, said cells being arranged in tiers along each conductive rod and each cell being provided with a magnetic-circuit body coupled to the assembly of arms and three secondary windings having a large number of turns mounted on said magnetic-circuit body, the body Of each magnetic circuit being at the potential of one point of the rectifier which is associated therewith.
Claim 5
Dependent Claim
118 words
A device according to claim 3, wherein each cell constitutes a module comprising a support plate provided with a first set of aligned perforations through which are permitted to pass the two arms of each conductive rod forming a primary and with a second set of perforations for the insertion of support-plate alignment rods which are isolated from the support plates and wherein provision is made for compression means whereby said support plates located by means of isolating spacer members are clamped together and said plates are applied against a base support fitted with leak-tight lead-in bushings for the free ends of all the arms, said base support being intended to constitute a bottom wall of the tank.
Claim 6
Dependent Claim
46 words
A device according to claim 4, wherein the compression means comprise a pressure ring for producing action on the support plate located at the greatest distance from the free extremities of each conductive hairpin rod and tie-rods placed between the base support and said support plate.
Claim 7
Dependent Claim
18 words
A device according to claim 5, wherein the support plates are metallic and fitted with a guard ring.
Claim 8
Dependent Claim
20 words
A device according to claim 6, wherein the base support which forms the bottom tank wall is of non-magnetic metal.
Claim 9
Dependent Claim
38 words
A device according to claim 7, wherein the base support forming the bottom tank wall is rigidly fixed to a frame forming an extension of the tank, said frame being employed as a support for a rod-supply transformer.
Claim 10
Dependent Claim
20 words
A device according to claim 8, wherein each support plate carries a silicon-diode rectifier, a smoothing capacitor and protective resistors.
Claim 11
Dependent Claim
20 words
A device according to claim 2, wherein said device comprises high-power protective resistors each placed between two successive support plates.
Claim 12
Dependent Claim
36 words
An electric generator according to claim 2, wherein said generator comprises capacitors having a capacitance of several hundred picofarads each interposed between two successive plates at least between the plates which are at the highest potentials.
Claim 13
Dependent Claim
21 words
A device according to claim 4, wherein said device comprises a leak-tight high-voltage lead-in bushing through a cover of the tank.
Claim 14
Dependent Claim
36 words
A device according to claim 4, wherein the support plates have aligned perforations for the insertion of an insulating tube containing a high-voltage conductor and constituting a high-voltage passage through the bottom wall of the tank.
Claim 15
Independent Claim
161 words
A device for producing a large direct-current potential difference from an alternating-current source, comprising: a transfer winding supplied by said source; and a plurality of cells each comprising a secondary winding coupled inductively to said transfer winding and a rectifier circuit supplied by said secondary winding, the outputs of the rectifiers of said cells being placed in series, wherein said device comprises at least one straight bare rod of material having good electrical conductivity, said rod being contained at least partially within a leak-tight tank which is intended to receive a gas having high dielectric strength and constituting together with a solid bare return conductor said primary transfer winding having a single loop and connected to a low-voltage alternating-current supply; said cells being arranged in tiers along the bare rod, each cell comprising a closed magnetic-circuit body around the rod or each rod and at least one secondary winding having a large number of turns and mounted on said magnetic-circuit body.
Claim 16
Independent Claim
161 words
A device for producing a large direct-current potential difference from an alternating-current source, comprising: a transfer winding supplied by said source; and a plurality of cells each comprising a secondary winding coupled inductively to said transfer winding and a rectifier circuit supplied by said secondary winding, the outputs of the rectifiers of said cells being placed in series, wherein said device comprises at least one straight bare rod of material having good electrical conductivity, said rod being contained at least partially within a leak-tight tank which is intended to receive a gas having high dielectric strength and constituting together with a solid bare return conductor said primary transfer winding having a single loop and connected to a low-voltage alternating-current supply; said cells being arranged in tiers along the bare rod, each cell comprising a closed magnetic-circuit body around the rod or each rod and at least one secondary winding having a large number of turns and mounted on said magnetic-circuit body.
Claim 17
Dependent Claim
69 words
A device according to claim 14, wherein each cell constitutes a module which can be removed as a single unit and comprises a support plate provided with a perforation (or a set of perforations) enabling the rod or rods to pass therethrough and having a sufficient diameter to enable the gas ring between the rod and the support plate to ensure insulation at the output voltage of the device.
Claim 18
Dependent Claim
25 words
A device according to claim 15, wherein said device comprises a shielding ring cArried by each support plate around the rod or around each rod.
Claim 19
Dependent Claim
50 words
A device according to claim 15, wherein the modules are carried by a beam of insulating material which is secured to one of the walls of the tank and has a cross-section in the shape of an inverted U, the bottom of which is parallel to the rod or rods.
Claim 20
Dependent Claim
21 words
A device according to claim 17, wherein the support plate of each cell engages in support grooves of the insulating beam.
Claim 21
Dependent Claim
32 words
A device according to claim 18, wherein each cell comprises an equipotential ring placed around the beam and connected to the corresponding plate by means of retaining push-rods extending through the beam.
Claim 22
Dependent Claim
30 words
A device according to claim 19, wherein the beam has a removable insulating cover which is parallel to the end-wall and serves to retain the cell plates within the beam.
Claim 23
Dependent Claim
37 words
A device according to claim 20, wherein the rod or rods is or are removable in the upward direction in order to withdraw the cells independently of each other by sliding within the grooves of the beam.
Claim 24
Dependent Claim
62 words
A device according to any one of claim 14 and having a three-phase current supply, wherein said device comprises two bare conductive rods, each cell being provided with three secondary windings each placed around one arm of a magnetic circuit which completely surrounds the two rods, the return of alternating current being effected through a conductor which is connected to the rods.
Claim 25
Dependent Claim
27 words
A device according to claim 22, wherein the conductor is connected to the rods by a conductive yoke placed within the tank above the stack of cells.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |