Patent US4174784A successfully refreshed from Google Patents.
Patent US3655902A successfully refreshed from Google Patents.
US3655902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system for electron beam furnace
Assignee: Airco Inc
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Filing: 1970-10-19
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Granted: 1972-04-11
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Expires: 1990-10-19
Abstract
Abstract An electron beam furnace heating system is described wherein an electron beam produced by an electron gun is directed to a target by a transverse magnetic field in the path of the beam. The field is established by a pair of bar-shaped pole pieces having their longitudinal axes in a common plane and the field of sufficient strength that the beam is deflected to emerge from the same side of the magnetic field as the side from which it enters.
Inventors
- 👤 Alexander H Firestone
- 👤 Robert W Fisk
- 👤 Kurt D Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:04
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/305; C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/228
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
208 words
In an electron beam furnace, a heating system comprising, an electron beam gun for producing an electron beam, and means for directing the beam to a target, said directing means including a pair of bar-shaped pole pieces having their longitudinal axes in a common plane and positioned to produce a transverse magnetic field in the path of the beam, said magnetic field having a region between said pole pieces of substantially straight lines of force and having a fringe region of bowed lines of force toward the direction from which the electron beam enters said magnetic field, means for varying the angle at which the electron beam is injected into the said magnetic field produced by said pole pieces to thereby vary the direction of the emerging beam, and means for energizing said pole pieces to produce a magnetic field of sufficient strength that the electron beam is deflected to emerge from the same side of said magnetic field as the side from which it enters, and is prevented from penetrating past a plane extending through the longitudinal axes of said pole pieces, said pole pieces being of a width such that substantially all of the electron beam is deflected within the fringe region of said magnetic field.
Claim 2
Dependent Claim
208 words
In an electron beam furnace, a heating system comprising, an electron beam gun for producing an electron beam, and means for directing the beam to a target, said directing means including a pair of bar-shaped pole pieces having their longitudinal axes in a common plane and positioned to produce a transverse magnetic field in the path of the beam, said magnetic field having a region between said pole pieces of substantially straight lines of force and having a fringe region of bowed lines of force toward the direction from which the electron beam enters said magnetic field, means for varying the angle at which the electron beam is injected into the said magnetic field produced by said pole pieces to thereby vary the direction of the emerging beam, and means for energizing said pole pieces to produce a magnetic field of sufficient strength that the electron beam is deflected to emerge from the same side of said magnetic field as the side from which it enters, and is prevented from penetrating past a plane extending through the longitudinal axes of said pole pieces, said pole pieces being of a width such that substantially all of the electron beam is deflected within the fringe region of said magnetic field.
Claim 3
Dependent Claim
37 words
A system according to claim 1 wherein said energizing means are adapted to provide a field strength sufficient to cause a change in direction of the beam through an angle of between about 105* and about 165*.
Claim 4
Dependent Claim
19 words
A system according to claim 1 wherein said angle varying means produce a variation in more than one plane.
Claim 5
Dependent Claim
16 words
A system according to claim 1 wherein said pole pieces are substantially parallel with each other.
Claim 6
Dependent Claim
52 words
A system according to claim 1 wherein at least a portion of each of said pole pieces is disposed to slant inwardly toward the corresponding portion of the other of said pole pieces such that the space between said pole pieces narrows in the direction of the region directly above the target.
Claim 7
Dependent Claim
53 words
A system according to claim 1 wherein said energizing means include an electromagnetic coil having a low reluctance core, means forming a low reluctance magnetic flux path from the ends of said core to the respective pole pieces, and a magnetic shield disposed between said coil and the path of the electron beam.
Claim 8
Dependent Claim
60 words
A system according to claim 6 wherein said path forming means include a pair of upright extensions of low reluctance material forming a flux path from the ends of said core to ends of the respective pole pieces, and wherein said magnetic shield is disposed between at least a portion of said extensions and the path of the Electron beam.
Claim 9
Dependent Claim
98 words
A system according to claim 1 including a further electron beam gun positioned to project an electron beam into said magnetic field on the same side thereof as the beam produced by said first named electron beam gun, said energizing means being adapted to produce a magnetic field of sufficient strength that the electron beam produced by said further electron beam gun is deflected to emerge from the same side of the magnetic field as the side from which it enters and is prevented from penetrating past a plane extending through the longitudinal axes of said pole pieces.
Claim 10
Dependent Claim
46 words
A system according to claim 1 wherein the plane common to the longitudinal axes of said pole pieces is about perpendicular to a plane which bisects the angle between the incoming and outgoing electron beam paths and which is perpendicular to a plane including such paths.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |