Patent JPS5884394A successfully refreshed from Google Patents.
US4368538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spot focus flash X-ray source
Assignee: International Business Machines Corp
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Filing: 1980-04-11
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Granted: 1983-01-11
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Expires: 2000-04-11
Abstract
Abstract A high intensity spot focus soft X-ray source is described. The source produces a spectrum in the range from about 5 A to 300 A, with maximum power in the neighborhood of tens of angstroms. The flash intensity of the flash source is in the neighborhood of 10 17 X-ray photons per flash. The source has an anode, and a cathode which is spaced apart from the anode and has a protrusion thereon. An insulating body having a passage therethrough is positioned between the anode and the cathode. The passage and the protrusion are axially aligned. At least one viewing port for the passage is provided. A means for maintaining the potential between the anode and the cathode allows the establishment of a potential between the same.
Inventors
- 👤 Richard A. McCorkle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
H; H05; H05G; H05G2/00; H05G2/001; H01; H01J; H01J35/00; H01J35/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
64 words
A flash X-ray source comprising: an anode; a cathode with a protrusion thereon; an insulating body having a passage therethrough which is symmetrically disposed and axially aligned with said protrusion on said cathode, said insulating body being positioned between said anode and said cathode; at least one viewing port for said passage; and means for maintaining a potential between said anode and said cathode.
Claim 2
Dependent Claim
64 words
A flash X-ray source comprising: an anode; a cathode with a protrusion thereon; an insulating body having a passage therethrough which is symmetrically disposed and axially aligned with said protrusion on said cathode, said insulating body being positioned between said anode and said cathode; at least one viewing port for said passage; and means for maintaining a potential between said anode and said cathode.
Claim 3
Dependent Claim
32 words
The source of claim 1 wherein said passage and protrusion are conical in form and said protrusion having said viewing port therethrough, said viewing port being axially aligned with said conical protrusion.
Claim 4
Dependent Claim
28 words
The source of claim 1 wherein said passage is conical and multiple ports pass through the insulating body and are symmetrically disposed with respect to said conical passage.
Claim 5
Dependent Claim
13 words
The source of claim 1 wherein said anode and said cathode are carbon.
Claim 6
Dependent Claim
16 words
The source of claim 1 wherein said insulating body is Teflon (CF 2 ) n .
Claim 7
Dependent Claim
65 words
The source of claim 1 wherein said means to maintain a potential between said anode and said cathode is a capacitor and further comprising: means for electrically connecting said anode and said cathode allowing passage of a current to equalize the potential between said anode and said cathode during charging of said capacitor; and means for triggering a discharge between said anode and said cathode.
Claim 8
Dependent Claim
45 words
The source of claim 6 wherein multiple capacitors are employed to maintain a potential between said anode and said cathode and said capacitors symmetrically disposed and axially aligned with said passage and said means for electrically connecting said anode and said cathode is a resistor.
Claim 9
Dependent Claim
36 words
The source of claim 7 wherein said resistor has a resistance such that the product of the resistance of said resistor and the capacitance of said multiple capacitors is between about 2 microseconds and 20 microseconds.
Claim 10
Dependent Claim
23 words
The X-ray source of claim 1 wherein said insulating material has at least one element with an atomic number of less than eighteen.
Claim 11
Dependent Claim
46 words
The source of claim 1 wherein the maximum diameter of said protrusion is between about 0.1 cm and about 2.0 cm, and the anode and cathode spacing is between about 0.2 cm and 2.0 cm, where said spacing is measured between said anode and said protrusion.
Claim 12
Dependent Claim
30 words
The source of claim 1 wherein said passage and said protrusion are conical in form and said anode has a cavity which is aligned with said passage and said anode.
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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) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |