US3934164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray tube having composite target
Assignee: Machlett Laboratories Inc
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Filing: 1975-02-14
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Granted: 1976-01-20
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Expires: 1995-02-14
Abstract
Abstract An X-ray tube including an evacuated envelope having therein a rotatable anode target comprising a cup-shaped disc open toward an electron emitting cathode and having a sloped inner wall provided with an annular groove wherein a plurality of rod-like members are disposed in side-by-side relationship, the rod-like members being made of rare earth composite material to provide substantially monochromatic X-radiation when bombarded with electrons.
Inventors
- 👤 Martin Braun
- 👤 Joseph R. Suffredini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:37
CPC Classifications
H; H01; H01J; H01J35/00; H01J35/02; H01J35/04; H01J35/08; H01J35/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
75 words
An X-ray tube comprising: an envelope; a cup-shaped anode target rotatably supported within the envelope and having an inner wall surface; an electron emitting cathode supported within the envelope in spaced relationship with the inner wall surface of the target; and an annular focal track disposed on the inner wall surface, the track including composite material made of an element of the lanthanide series and a second element having an atomic number lower than 57.
Claim 2
Dependent Claim
75 words
An X-ray tube comprising: an envelope; a cup-shaped anode target rotatably supported within the envelope and having an inner wall surface; an electron emitting cathode supported within the envelope in spaced relationship with the inner wall surface of the target; and an annular focal track disposed on the inner wall surface, the track including composite material made of an element of the lanthanide series and a second element having an atomic number lower than 57.
Claim 3
Dependent Claim
24 words
An X-ray tube as set forth in claim 1 wherein the second element comprises an element of the group including boron, carbon, and beryllium.
Claim 4
Dependent Claim
16 words
An X-ray tube as set forth in claim 2 wherein the composite material is cerium boride.
Claim 5
Dependent Claim
26 words
An X-ray tube as set forth in claim 1 wherein the target is made of a material having a higher heat capacity than the composite material.
Claim 6
Dependent Claim
17 words
An X-ray tube as set forth in claim 4 wherein the target is made of graphite material.
Claim 7
Dependent Claim
36 words
An X-ray tube as set forth in claim 1 wherein an arcuate portion of the annular focal track comprises a plurality of members having respective elongated surface areas exposed toward the axial centerline of the target.
Claim 8
Dependent Claim
23 words
An X-ray tube as set forth in claim 6 wherein the arcuate portion comprises a plurality of rod-like members arranged in side-by-side relationship.
Claim 9
Dependent Claim
20 words
An X-ray tube as set forth in claim 7 wherein each of said members is made of the composite material.
Claim 10
Dependent Claim
19 words
An X-ray tube as set forth in claim 8 wherein each of said members is made of cerium boride.
Claim 11
Dependent Claim
20 words
An X-ray tube as set forth in claim 7 wherein each of said members is made of barium compound material.
Claim 12
Dependent Claim
18 words
An X-ray tube as set forth in claim 7 wherein each of said members is made of tungsten.
Claim 13
Dependent Claim
18 words
An X-ray tube as set forth in claim 7 wherein each of said members is made of manganese.
Claim 14
Dependent Claim
51 words
An X-ray target of the rotating type comprising: a cup-shaped body having an inner wall surface; and an annular focal track disposed on the inner wall surface and including a composite material made of an element of the lanthanide series and a second element having an atomic number lower than 57.
Claim 15
Dependent Claim
51 words
An X-ray target of the rotating type comprising: a cup-shaped body having an inner wall surface; and an annular focal track disposed on the inner wall surface and including a composite material made of an element of the lanthanide series and a second element having an atomic number lower than 57.
Claim 16
Dependent Claim
34 words
An X-ray target as set forth in claim 13 wherein said inner wall surface is provided with an annular channel and the focal track comprises an annular array of members disposed in the channel.
Claim 17
Dependent Claim
25 words
An X-ray target as set forth in claim 14 wherein at least an arcuate portion of the array comprises a plurality of juxtaposed rod-like members.
Claim 18
Dependent Claim
21 words
An X-ray target as set forth in claim 15 wherein each of the rod-like members is made of said composite material.
Claim 19
Dependent Claim
20 words
An X-ray target as set forth in claim 16 wherein each of the rod-like members is made of cerium boride.
Claim 20
Dependent Claim
21 words
An X-ray target as set forth in claim 15 wherein each of the rod-like members is made of barium compound material.
Claim 21
Dependent Claim
19 words
An X-ray target as set forth in claim 15 wherein each of the rod-like members is made of tungsten.
Claim 22
Dependent Claim
19 words
An X-ray target as set forth in claim 15 wherein each of the rod-like members is made of manganese.
References Cited (Backward Citations)
US3842305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |