US4057746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demountable high power electron beam gun
Assignee: Sciaky SAS
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Filing: 1976-06-24
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Granted: 1977-11-08
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Expires: 1996-06-24
Abstract
Abstract The invention concerns an electron gun for the production of an electron beam designed primarily for welding workpieces and including, in a frame, the mechanical facilities required for holding in a coaxial position and electrically insulating a cathode, a filament, a wehnelt and an anode. Gun featured by the fact that the cathode is held by mechanical systems in the coaxial position via several rods made of conductive material, one end of these rods being rigidly fixed with respect to the frame, the other end being applied against the outer wall of the disc shaped cathode, thus forming a positioning clamp for said cathode. The structure allows for the efficient cooling of the internal parts of the gun.
Inventors
- 👤 Paul Dumonte, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:11
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/04; H01J37/06; H01J37/075; H01J37/30; H01J37/315
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
An electron gun for the generation of high power density electron beams adapted to the welding of workpieces comprising: means for holding in coaxial position and electrically insulated from one another replacable filament, a wehnelt and anode; multiple heat and electricity conducting rod means for maintaining the said cathode in coaxial position, one end of each said rod means being rigidly with respect to the said holding means, the other end of each rod means being applied against the outer side wall of the said replacable cathode so as to form a positioning clamp for the said cathode.
Claim 2
Dependent Claim
98 words
An electron gun for the generation of high power density electron beams adapted to the welding of workpieces comprising: means for holding in coaxial position and electrically insulated from one another replacable filament, a wehnelt and anode; multiple heat and electricity conducting rod means for maintaining the said cathode in coaxial position, one end of each said rod means being rigidly with respect to the said holding means, the other end of each rod means being applied against the outer side wall of the said replacable cathode so as to form a positioning clamp for the said cathode.
Claim 3
Dependent Claim
71 words
An electron gun as in claim 1 in which the filament, the wehnelt, and the rods which support the cathode are rigidly fixed with respect to the first mentioned holding means to the end plate of an insulator by means of fasteners insulated from one another which pass through and are sealed to the said end plate so as to prevent gas leaking between the said fasteners and the end plate.
Claim 4
Dependent Claim
126 words
An electron gun conforming to claim 1 in which a cylindrical frame supports a hollow tapered insulator which is formed with an external flange at its largest diameter and an internal flange at the small diameter end; an end plate of insulating material fitted with a sealing means at its periphery and positioned against the said inside flange, the said end plate fitted with fasteners for supporting the said wehnelt, filament, and cathode in fixed relationship and insulated from one another outside the hollow space, the said fasteners passing through the full thickness of the said insulator for connection to the terminal pins of a power feed cable which is supported by a second insulator held concentrically within the hollow of the said first mentioned insulator.
Claim 5
Dependent Claim
42 words
A gun according to claimin whichthesaidfasteneers which pass through the end plate are provided with radiator fins protruding inside the hollow portion of the said insulator so that air circulated around the radiator fins may act to remove heat from the fins.
Claim 6
Dependent Claim
48 words
An electron gun according to claim 4 in which the said second insulator, at its end, is provided with a support plate containing spring loaded pins which are connected to the power feed conductors, the said pins making elastic electric connection to the cathode, wehnelt and filament fasteners.
Claim 7
Dependent Claim
60 words
A gun in accordance with claim 5 above in which the said second insulator forming the plug and supporting the pin support plate fits within the hollow of the said first insulator but in spaced relationship to it so as to form a laminar space between the two insulators for the passage of air to cool the said radiator fins.
Claim 8
Dependent Claim
18 words
A gun in accordance with claim 6 in which the rods supporting the cathode are made of tungsten.
Claim 9
Dependent Claim
20 words
A gun in accordance with claim 7 in which the said end plate insulator is made of a refractory material.
Claim 10
Dependent Claim
24 words
An electron gun according to claim 8 in which the cathode is formed with a peripheral groove in which the rod ends are positioned.
Claim 11
Dependent Claim
20 words
An electron gun according to claim 9 including three rods positioned at 120° from one another which support the cathode.
Claim 12
Dependent Claim
19 words
An electron gun according to claim 10 in which the rods are positioned tangentially to the cathode peripheral wall.
Claim 13
Dependent Claim
23 words
An electron gun according to claim 11 in which the rods are fastened on the said end plate through blocks of refractory material.
References Cited (Backward Citations)
US3187216A
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US3354340A
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US3449617A
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US3478244A
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US3609400A
Cited
US3681643A
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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) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |