US3617686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for treating workpieces with magnetically focused beams of electrically charged particles
Assignee: Individual
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Filing: 1969-07-16
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Granted: 1971-11-02
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Expires: 1989-07-16
Abstract
Abstract In an apparatus for the application of beams of charged particles to the treating of work and which includes an electronoptical lens for varying the energy density in the beam and an electromagnetic lens having an alternating potential component of fixed frequency superposed on its supply voltage so that the focal length of the lens varies as a function of the frequency, of means, particularly desirable for welding by electron beams, to make distribution of energy variable over the impingement section of the electron beam, that is, at the area of the treatment, whereby it becomes possible better to adapt to the properties of the material for achieving satisfactory welded connections.
Inventors
- 👤 Walter Dietrich
- 👤 Dieter Fritz
- 👤 Hans D Kluger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:01
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/30; H01J37/3002; H01J37/3007; B; B23; B23K; B23K15/00; B23K15/02; H01J37/02; H01J37/04; H01J37/10; H01J37/12; H01J37/145; H01J37/302
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
An arrangement for controlling the intensity of a beam of charged particles comprising, in combination, a source of charged particles; means for directing said particles in a beam along a predetermined stationary path; electrostatic lens means along said path of said beam of charged particles for shaping and modifying said beam, said beam being stationary in space; and electrical waveform generating means connected to said electrostatic lens means and applying a cyclically varying voltage to said electrostatic lens means for varying the intensity distribution of said stationary beam at a predetermined cross-sectional area of said beam.
Claim 2
Dependent Claim
96 words
An arrangement for controlling the intensity of a beam of charged particles comprising, in combination, a source of charged particles; means for directing said particles in a beam along a predetermined stationary path; electrostatic lens means along said path of said beam of charged particles for shaping and modifying said beam, said beam being stationary in space; and electrical waveform generating means connected to said electrostatic lens means and applying a cyclically varying voltage to said electrostatic lens means for varying the intensity distribution of said stationary beam at a predetermined cross-sectional area of said beam.
Claim 3
Dependent Claim
31 words
The arrangement as defined in claim 1 wherein said intensity distribution comprises the energy distribution of said beam between the center of said beam and the peripheral portion of said beam.
Claim 4
Dependent Claim
22 words
The arrangement as defined in claim 1 wherein the frequency of said cyclically varying voltage is at least 600 cycles per second.
Claim 5
Dependent Claim
21 words
The arrangement as defined in claim 1 wherein said electrostatic lens means is symmetrical about the central axis of said beam.
Claim 6
Dependent Claim
25 words
The arrangement as defined in claim 1 including electromagnetic lens means along said path of said beam of charged particles for further shaping said beam.
Claim 7
Dependent Claim
32 words
The arrangement as defined in claim 1 wherein said electrostatic lens means comprises a plurality of pairs of plates electrically isolated; and means for applying different voltages to said pairs of plates.
Claim 8
Dependent Claim
16 words
The arrangement as defined in claim 1 wherein said electrostatic lens means comprises a disc-shaped member.
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |