Patent US4858237A successfully refreshed from Google Patents.
US4858237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam apparatus
Assignee: Teledyne UK Ltd
•
Filing: 1987-05-20
•
Granted: 1989-08-15
•
Expires: 2007-05-20
Abstract
Abstract A laser arrangement includes electron beam apparatus comprising a plurality of electrodes, each of which having an aperture therethrough. The apertures are aligned along the longitudinal axis of an envelope which surrounds them and contains gas. The electrodes are electrically connected such that, of an adjacent pair, one is at a lower potential than the other. An electron beam is produced between the first electrode and an adjacent electrode, and is accelerated along the axis through the apertures, the electron current increasing in magnitude. The electron beam produced is used to provide pumping powder to the gas contained within the envelope such that it acts as a laser amplifying medium.
Inventors
- 👤 Arthur Maitland
- 👤 Clifford R. Weatherup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:59
CPC Classifications
H; H01; H01J; H01J33/00; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/09; H01S3/0955; H01S3/0959
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
87 words
Electron beam apparatus comprising: means for forming a highly directional electron beam having a beam path, the electron beam delivering energy to a media; a gas-filled envelope containing an electrode, said electrode having an aperture therethrough and, except within said aperture, being coated over substantially all its surface with electrically insulating material, said electrode being disposed so that said aperture lies along said beam path and said electrode extends in the direction of said beam path; and means for accelerating electrons of the beam through said aperture.
Claim 2
Dependent Claim
87 words
Electron beam apparatus comprising: means for forming a highly directional electron beam having a beam path, the electron beam delivering energy to a media; a gas-filled envelope containing an electrode, said electrode having an aperture therethrough and, except within said aperture, being coated over substantially all its surface with electrically insulating material, said electrode being disposed so that said aperture lies along said beam path and said electrode extends in the direction of said beam path; and means for accelerating electrons of the beam through said aperture.
Claim 3
Dependent Claim
76 words
Apparatus as claimed in claim 1, wherein said means for forming an electron beam comprises an anode and a cathode within said envelope, said cathode having a hole therein and, except within said hole, being coated over substantially all its surface with electrically insulating material, the arrangement being such that, when a suitably high voltage is applied between said cathode and said anode, an electron beam is formed extensive in a direction away from said hole.
Claim 4
Dependent Claim
21 words
Apparatus as claimed in claim 2, wherein said hole is an aperture extending through said cathode from one face to another.
Claim 5
Dependent Claim
16 words
Apparatus as claimed in claim 2, wherein said electrode is arranged to act as said anode.
Claim 6
Dependent Claim
49 words
Apparatus as claimed in claim 1 and including a plurality of electrodes, each electrode having an aperture therethrough and, except within said aperture, being coated over substantially all its surface with electrically insulating material, the electrodes being arranged such that said electron beam passes through each aperture in turn.
Claim 7
Dependent Claim
24 words
Apparatus as claimed in claim 5, wherein said electrodes are arranged such that said apertures are aligned along the longitudinal axis of said envelope.
Claim 8
Dependent Claim
33 words
Apparatus as claimed in claim 5, wherein an adjacent pair of electrodes is arranged such that the electrode which said electron beam passes through first is at a lower potential than the other.
Claim 9
Dependent Claim
27 words
Apparatus as claimed in claim 1 and wherein said electrode includes a plurality of apertures therethrough and respective electron beams are arranged to pass through respective apertures.
Claim 10
Dependent Claim
56 words
Apparatus as claimed in claim 8 and including a plurality of electrodes, each electrode having a plurality of apertures therethrough and, except within said apertures, being coated over substantially all its surface with electrically insulating material, said electrode being arranged such that each of said electron beams passes through one of the apertures in each electrode.
Claim 11
Dependent Claim
29 words
A laser arrangement including apparatus as claimed in claim 1 wherein said electron beam is arranged to provide pumping power for at least part of a laser active media.
Claim 12
Dependent Claim
18 words
An arrangement as claimed in claim 10, wherein the envelope contains said electrode and said laser active media.
Claim 13
Dependent Claim
77 words
an arrangement as claimed in claim 10 wherein said means for forming an electron beam comprises an anode and a cathode within said envelope, said cathode having a hole therein and, except within said hole, being coated over substantially all its surface with electrically insulating material, the arrangement being such that, when a suitably high voltage is applied between said cathode and said anode, an electron beam is formed extensive in a direction away from said hole.
Claim 14
Dependent Claim
50 words
An arangement as claimed in claim 12 and including a plurality of electrodes, each electrode having an aperture therethrough and, except within said aperture, being coated over substantially all its surface with electrically insulating material, the electrodes being arranged such that said electron beam passes through each aperture in turn.
Claim 15
Dependent Claim
25 words
An arrangement as claimed in claim 13 wherein said electrodes are arranged such that said apertures are aligned along the optical axis of the arrangement.
Claim 16
Dependent Claim
24 words
Apparatus as claimed in claim 1, wherein said media comprises the gas in the envelope, and wherein said energy provides pumping in a laser.
Claim 17
Dependent Claim
91 words
Electron beam apparatus comprising: an envelope; media in the envelope; means for forming a highly directional electron beam in the envelope, said electron beam having a beam path and delivering energy to said media; an electrode having an aperture therethrough and, except within said aperture, being coated over substantially all its surface with electrically insulating material, said electrode being disposed so that said aperture lies along said beam path and said electrode extends in the direction of said beam path; and means for accelerating electrons of said beam through said aperture.
Claim 18
Dependent Claim
91 words
Electron beam apparatus comprising: an envelope; media in the envelope; means for forming a highly directional electron beam in the envelope, said electron beam having a beam path and delivering energy to said media; an electrode having an aperture therethrough and, except within said aperture, being coated over substantially all its surface with electrically insulating material, said electrode being disposed so that said aperture lies along said beam path and said electrode extends in the direction of said beam path; and means for accelerating electrons of said beam through said aperture.
References Cited (Backward Citations)
GB1032063A
Cited
GB1099413A
Cited
US3678409A
Cited
US3460053A
Cited
US3543182A
Cited
US3492598A
Cited
US3750047A
Cited
GB1390309A
Cited
US3831052A
Cited
US3931589A
Cited
US4031428A
Cited
EP0015297A1
Cited
US4287484A
Cited
US4698546A
Cited
US4758766A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |