US3558890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leakage-proof neutron diffractometer
Assignee: Mitsubishi Electric Corp
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Filing: 1968-03-28
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Granted: 1971-01-26
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Expires: 1988-03-28
Abstract
Abstract A beam of neutrons passes through a hole disposed in a stationary shield and an opening disposed in a rotatable shield contained within the stationary shield and opposed to and diverging toward the hole. The beam impinges upon a crystal positioned within the rotatable shield. The crystal reflects the incident neutrons to form a beam of monochromatic neutrons which, in turn, passes through a radial hole disposed in the rotatable shield and a circumferentially wide slot disposed in the stationary shield and the beam of monochromatic neutrons is taken out from the slot.
Inventors
- 👤 Kazuo Yanagishita
- 👤 Akira Iwakishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:55
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/06; G21K2201/00; G21K2201/06; G21K2201/062; G21K2201/068
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
In a neutron diffractometer, the combination of a stationary shield block including a hollow portion, a narrow inlet passageway through which a beam of neutrons is introduced into said hollow portion, and a wide outlet passageway through which the beam of neutrons is extracted from said hollow portion; a rotatable shield block rotatably disposed in said hollow portion, and including a wide inlet passageway opposing to said narrow inlet passageway in said stationary shield block, a central space communicating with said wide inlet passageway, and a narrow outlet passage communicating with said central space and opposing to said wide outlet passageway; an irradiated member positioned in said central space; and a beam of neutrons passing through said narrow inlet passageway and said wide inlet passageway to irradiate said irradiated member to be reflected from the latter, the reflected beam of neutrons being extracted through said narrow outlet passageway and said wide outlet passageway.
Claim 2
Dependent Claim
153 words
In a neutron diffractometer, the combination of a stationary shield block including a hollow portion, a narrow inlet passageway through which a beam of neutrons is introduced into said hollow portion, and a wide outlet passageway through which the beam of neutrons is extracted from said hollow portion; a rotatable shield block rotatably disposed in said hollow portion, and including a wide inlet passageway opposing to said narrow inlet passageway in said stationary shield block, a central space communicating with said wide inlet passageway, and a narrow outlet passage communicating with said central space and opposing to said wide outlet passageway; an irradiated member positioned in said central space; and a beam of neutrons passing through said narrow inlet passageway and said wide inlet passageway to irradiate said irradiated member to be reflected from the latter, the reflected beam of neutrons being extracted through said narrow outlet passageway and said wide outlet passageway.
Claim 3
Dependent Claim
174 words
In a neutron diffractometer, the combination of a stationary shield block including a hollow portion, a narrow inlet passage through which a beam of neutrons is introduced in said hollow portion, and a plurality of wide outlet passageways through which beams of neutrons are extracted from said hollow portion; a plurality of rotatable shield blocks rotatably disposed in said hollow portion, each of said rotatable shield blocks including one wide inlet passageway disposed in opposite relationship with respect to said narrow inlet passageway, a central space communicating with said wide inlet passageway, and one narrow outlet communicating with said central space and disposed in opposite relationship with respect to a different one of said wide outlet passageways; one irradiated member positioned in each of said rotatable shield block; and a beam of neutrons passing through said narrow inlet passageway and said wide inlet passageways respectively to irradiate said respective irradiated members to be reflected from the latter, each of the reflected beams of neutrons being extracted through the associated narrow and wide outlet passageways.
Claim 4
Dependent Claim
174 words
In a neutron diffractometer, the combination of a stationary shield block including a hollow portion, a narrow inlet passage through which a beam of neutrons is introduced in said hollow portion, and a plurality of wide outlet passageways through which beams of neutrons are extracted from said hollow portion; a plurality of rotatable shield blocks rotatably disposed in said hollow portion, each of said rotatable shield blocks including one wide inlet passageway disposed in opposite relationship with respect to said narrow inlet passageway, a central space communicating with said wide inlet passageway, and one narrow outlet communicating with said central space and disposed in opposite relationship with respect to a different one of said wide outlet passageways; one irradiated member positioned in each of said rotatable shield block; and a beam of neutrons passing through said narrow inlet passageway and said wide inlet passageways respectively to irradiate said respective irradiated members to be reflected from the latter, each of the reflected beams of neutrons being extracted through the associated narrow and wide outlet passageways.
References Cited (Backward Citations)
US3002095A
Cited
US3268730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |