US4238043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray image intensifier
Assignee: Toshiba Corp
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Filing: 1977-05-17
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Granted: 1980-12-09
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Expires: 1997-05-17
Abstract
Abstract A highly evacuated X-ray image intensifier, whose X-ray inlet window section made of aluminium or alloy thereof is hermetically fused to the output section of a glass vessel by means of a joint ring formed of glass-wettable alloy or alloy fusible with glass, wherein the X-ray inlet window section and joint ring are hermetically fused together by inserting therebetween at least one intermediate member selected from the group consisting of the following materials: (a) tin (b) silicon--gold (c) silicon--tin (d) germanium--gold (e) germanium--tin
Inventors
- 👤 Hiroshi Minami
- 👤 Takashi Kuze
- 👤 Norio Harao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:45
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/24; H01J9/26; H01J9/263; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674; Y10T428/12708
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
(Thrice Amended) An evacuated X-ray image intensifier, comprising: an X-ray inlet window section made of aluminum or an alloy thereof; a glass envelope mainly constituting an output section; a joint ring prepared from a glass-wettable alloy and connected to said glass envelope; and sealing means as an intermediate member between said X-ray inlet window and said joint ring for hermetically fusing said X-ray inlet window and joint ring, said intermediate member including a first layer attached to said joint ring made of copper, a second layer attached to said inlet window and chosen from the group consisting of the following materials: (a) tin (b) silicon, and (c) germanium, and a third layer attached to said second layer and said first layer made of tin, said intermediate member not forming an intermetallic compound with any of the materials constituting said X-ray inlet window and said joint ring.
Claim 2
Dependent Claim
146 words
(Thrice Amended) An evacuated X-ray image intensifier, comprising: an X-ray inlet window section made of aluminum or an alloy thereof; a glass envelope mainly constituting an output section; a joint ring prepared from a glass-wettable alloy and connected to said glass envelope; and sealing means as an intermediate member between said X-ray inlet window and said joint ring for hermetically fusing said X-ray inlet window and joint ring, said intermediate member including a first layer attached to said joint ring made of copper, a second layer attached to said inlet window and chosen from the group consisting of the following materials: (a) tin (b) silicon, and (c) germanium, and a third layer attached to said second layer and said first layer made of tin, said intermediate member not forming an intermetallic compound with any of the materials constituting said X-ray inlet window and said joint ring.
Claim 3
Dependent Claim
21 words
The X-ring image intensifier according to claim 1, wherein the glass - wettable alloy is formed of nickel, cobalt and iron.
Claim 4
Dependent Claim
19 words
The X-ray image intensifier according to claim 1, wherein the joint ring is divided into a plurality of components.
Claim 5
Dependent Claim
52 words
The X-ray image intensifier according to claim 3, wherein at least one of the plural joint ring components is formed of a substantially nonmagnetic metal having a smaller magnetic permeability than 2 H/m and fused to the X-ray inlet window section with any of the sealing materials used as an intermediate member.
Claim 6
Dependent Claim
37 words
The X-ray image intensifier according to claim 4, wherein the metal constituting at least one of said plural joint ring components is an alloy formed of 18% of chromium, 8% of nickel and iron as the remainder.
Claim 7
Dependent Claim
43 words
The X-ray image intensifier according to claim 3, wherein at least one of the plural joint ring components is prepared from soft magnetic metal and fused to the X-ray inlet window section with any of the sealing materials used as an intermediate member.
Claim 8
Dependent Claim
26 words
The X-ray image intensifier according to claim 6, wherein the soft magnetic material is an alloy consisting of 78% of nickel and iron as the remainder.
Claim 9
Dependent Claim
33 words
The X-ray image intensifier according to claim 1, wherein the X-ray inlet window section and joint ring are fused together by means of heating and rubbing with the intermediate member inserted there between.
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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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |