US3710001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum tight high-frequency coaxial lead-through capable of handling high power
Assignee: TRAITEMENTS ELECTROLYTIQUES ET ELECTROTHERMIQUES Ste
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Filing: 1971-08-16
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Granted: 1973-01-09
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Expires: 1991-08-16
Abstract
Abstract A vacuum-tight, coaxial, high-frequency lead-through with high power handling capability, cooled by circulation of a liquid, including: an outer and a central copper conductor vacuum-tightly connected together by means of a ceramic cylindrical component, whose one end is brazed to a sleeve integral with a disk-shaped copper component vacuum-tightly attached to the central conductor, and whose other end is brazed to a sleeve integral with another disk-shaped copper component attached to the external conductor.
Inventors
- 👤 A Besson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:36
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
325 words
A coaxial, high-frequency, high power and vacuum-tight leadthrough including: a cylindrical central conductor of a high-conductivity metal; a cylindrical shielding coaxial with said conductor and made of said metal; an insulating hollow ceramic cylinder having the outer surfaces of its two extremities metallized for allowing the making of metal to ceramic junctions and an inner diameter greater than that of the central conductor and an outer diameter smaller that that of said shielding; a first component, referred to as lead-through base, made of said metal and comprising: a disk shaped portion having a central aperture vacuum-tightly joined to said central conductor, a peripheral cylindrical first sleeve portion of predetermined thickness integral with and extending perpendicularly to said disk portion and having an inner diameter substantially equal to the oUter one of said cylinder, said first sleeve portion being vacuum tightly joined to one of said metallized surfaces of said latter, and an annular groove of predetermined depth formed in said disk portion at its junction with said first sleeve portion for providing said latter with an elastic portion; and a second component made of said metal comprising: an annular solid disk-shaped portion vacuum tightly joined to said shielding and having a central opening whose diameter is approximately equal to the inner one of said cylinder, a cylindrical second sleeve portion, having the same shape as said first sleeve, integral with and extending perpendicularly to said annular disk portion and having an inner diameter substantially equal to the outer one of said cylinder, said second sleeve portion being vacuum-tightly joined to said latter, and two annular grooves of predetermined depths formed in said annular disk portion at both sides of its junction with said second sleeve portion for providing said latter with an elastic portion; whereby said first and said second sleevesensure a vacuum-tight metal to ceramic seal and their elastic portions ensure compensation for the difference in thermal dilatation of said metal and said ceramic.
Claim 2
Dependent Claim
325 words
A coaxial, high-frequency, high power and vacuum-tight leadthrough including: a cylindrical central conductor of a high-conductivity metal; a cylindrical shielding coaxial with said conductor and made of said metal; an insulating hollow ceramic cylinder having the outer surfaces of its two extremities metallized for allowing the making of metal to ceramic junctions and an inner diameter greater than that of the central conductor and an outer diameter smaller that that of said shielding; a first component, referred to as lead-through base, made of said metal and comprising: a disk shaped portion having a central aperture vacuum-tightly joined to said central conductor, a peripheral cylindrical first sleeve portion of predetermined thickness integral with and extending perpendicularly to said disk portion and having an inner diameter substantially equal to the oUter one of said cylinder, said first sleeve portion being vacuum tightly joined to one of said metallized surfaces of said latter, and an annular groove of predetermined depth formed in said disk portion at its junction with said first sleeve portion for providing said latter with an elastic portion; and a second component made of said metal comprising: an annular solid disk-shaped portion vacuum tightly joined to said shielding and having a central opening whose diameter is approximately equal to the inner one of said cylinder, a cylindrical second sleeve portion, having the same shape as said first sleeve, integral with and extending perpendicularly to said annular disk portion and having an inner diameter substantially equal to the outer one of said cylinder, said second sleeve portion being vacuum-tightly joined to said latter, and two annular grooves of predetermined depths formed in said annular disk portion at both sides of its junction with said second sleeve portion for providing said latter with an elastic portion; whereby said first and said second sleevesensure a vacuum-tight metal to ceramic seal and their elastic portions ensure compensation for the difference in thermal dilatation of said metal and said ceramic.
Claim 3
Dependent Claim
73 words
Lead-through as claimed in claim 1, wherein said central conductor is hollow and wherein said lead-through further comprises a second hollow cylindrical conductor of said metal, parallel to said central conductor, traversing said annular disk portion and electrically and mechanically connnected to the outer surface of said shielding, whereby providing said lead-through and elements eventually connected thereto with means for cooling by circulation of a liquid through said hollow central and second conductors.
Claim 4
Dependent Claim
58 words
Lead-through as claimed in claim 1, wherein said central conductor is hollow and therein said shielding forms the inner wall of a closed hollow cylindrical vessel whose outer wall is coaxial therewith, said vessel being provided with inlet and outlet tubes for cooling said lead-through by circulation of a liquid through said hollow central conductor and said vessel.
Claim 5
Dependent Claim
26 words
Lead-through as claimed in claim 1, wherein the thickness of said sleeve portions is equal to or less that one-third of the depth of said grooves
Claim 6
Dependent Claim
26 words
Lead-through as claimed in claim 1, further comprising a flange for vacuum-tight mounting to a vacuum-tight chamber, said flange being vacuum-tightly joined to said second component.
Claim 7
Dependent Claim
14 words
Lead-through as claimed in claim 5, wherein said flange is made of stainless steel.
Claim 8
Dependent Claim
11 words
Lead-through as claimed in claim 5, wherein said metal is copper.
Claim 9
Dependent Claim
255 words
Lead-through as claimed in claim 1, of the type in which said shielding is insulated from ground, said lead-through further comprising: a second ceramic insulating cylinder having the outer surfaces of its two extremities metalized for allowing the making of metal to ceramic junction and an inner diameter greater than the outer one of said shielding; a third cylindrical sleeve portion of said metal and of predetermined thickness formed integrally with and extending perpendicularly to said annular disk portion, at the periphery of said latter and opposite to said second sleeve portion, said third sleeve portion having an inner diameter approximately equal to the outer one of said second cylinder and being vacuum-tightly joined to one of said metalized surfaces; a first annular component of predetermined height, referred to as wedge, made of said metal and having an inner diameter approximately equal to and an outer diameter smaller than that of said second cylinder, said first wedge, having at least one radical opening being inserted between said annular disk portion and the adjoining extremity of said second cylinder; a flange for connecting said lead-through to a vacuum chamber; a fourth cylindrical sleeve portion of said metal and of said thickness forming part of a second annular component integral with said flange, Said fourth sleeve, having the same shape as said third one, being vacuum-tightly joined to the other metallized surface of said second cylinder; and a second wedge identical to said first one inserted between said flange and the adjoining extremity of said second cylinder.
Claim 10
Dependent Claim
11 words
Lead-through as claimed in claim 8, wherein said metal is copper.
Claim 11
Dependent Claim
13 words
Lead-through as claimed in claim 8, wherein said flange is of stainless steel.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |