US3828192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spherical segment electrode imaging chamber
Assignee: ELSCINT IMAGING Inc
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Filing: 1973-08-31
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Granted: 1974-08-06
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Expires: 1993-08-31
Abstract
Abstract An imaging chamber for an electron radiography system, including spaced spherical electrodes defining a gas gap therebetween. An arrangement for clamping the receptor sheet and stretching it to a spherical configuration against one of the electrodes. A plurality of clamp strips disposed about one electrode and spring loaded toward the other electrode, with the other electrode being moveable toward the first electrode to clamp the receptor sheet at the clamp strips and then move the clamp strips against the spring load to stretch the clamped receptor sheet.
Inventors
- 👤 A Morsell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/054; G03G15/0545
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
In an imaging chamber for an x-ray system, the combination of: first and second electrodes having the shape of spherical segments; means for mounting said electrodes in spaced relation defining a gap therebetween so that an x-ray source will be located at the spherical center of said electrodes; means for holding a charged particle receptor sheet in said gap at one of said electrodes; and means for maintaining a gas under pressure in the gap.
Claim 2
Dependent Claim
75 words
In an imaging chamber for an x-ray system, the combination of: first and second electrodes having the shape of spherical segments; means for mounting said electrodes in spaced relation defining a gap therebetween so that an x-ray source will be located at the spherical center of said electrodes; means for holding a charged particle receptor sheet in said gap at one of said electrodes; and means for maintaining a gas under pressure in the gap.
Claim 3
Dependent Claim
121 words
An imaging chamber as defined in claim 1 wherein said means for mounting includes means for moving said first electrode toward and away from said second electrode, and said means for holding includes a first frame positioned about said first electrode, a second frame positioned about and moveable toward and away from said second electrode, and spring means urging said second frame away from said second electrode, with said first and second frames clamping said receptor sheet therebetween as said first electrode is moved towards said second electrode, and stretching said receptor sheet into the shape of a spherical segment against said second electrode as said second frame is moved towards said second electrode against the urging of said spring means.
Claim 4
Dependent Claim
31 words
An imaging chamber as defined in claim 2 wherein said means for moving includes a plurality of threaded members, a drive motor, and means coupling said motor to said threaded members.
Claim 5
Dependent Claim
54 words
An imaging chamber as defined in claim 2 wherein said means for moving includes a plurality of screws mounted with one of said electrodes, a corresponding plurality of mating nuts mounted with the other of said electrodes for rotation on a screw, a drive motor, and means coupling said drive motor to said nuts.
Claim 6
Dependent Claim
59 words
An imaging chamber as defined in claim 4 including means mounted with one of said electrodes defining a plurality of threaded openings, a corresponding plurality of second screws mounted in the other of said electrodes for rotation in said openings as said first electrode is moved toward said second electrode, and means coupling said motor to said second screws.
Claim 7
Dependent Claim
51 words
An imaging chamber as defined in claim 2 wherein said second frame comprises a plurality of clamp strips having lips conforming to edges of said second electrode, with one surface of a lip engageable with said second electrode and with the opposite surface of the lip engageable with said receptor sheet.
Claim 8
Dependent Claim
31 words
An imaging chamber as defined in claim 6 wherein said first frame comprises a projecting ridge conforming to edges of said second electrode and fixed with respect to said first electrode.
Claim 9
Dependent Claim
30 words
An imaging chamber as defined in claim 7 wherein said means for maintaining includes a seal gasket carried in said ridge and engageable with said receptor sheet at said lips.
References Cited (Backward Citations)
US3766385A
Cited
US3774029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |