Patent US3942019A successfully refreshed from Google Patents.
US3942019A
Expired / Lapsed
US
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Electron collimator
Assignee: US Philips Corp
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Filing: 1974-04-24
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Granted: 1976-03-02
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Expires: 1994-04-24
Abstract
Abstract An electron collimator is formed by two pairs of multi-leaved corner plates which are capable of simultaneous movement to alter the dimension of the collimator in two dimensions. In a preferred embodiment each corner shaped plate has two leaves which interleave with the leaves of an adjoining corner plate.
Inventors
- 👤 Geoffrey Maximilian Lawrence Claridge
- 👤 Brian Sydney Driver
- 👤 Timothy Robert Jarvis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:16
CPC Classifications
A; A61; A61B; A61B6/00; A61B6/10; A61B6/107; G; G21; G21K; G21K1/00; G21K1/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
An electron beam collimating device, comprising an open ended structure having a substantially rectangular shape, said structure comprising four wall portions of which at least parts are substantially electron impermeable, said wall portions being interlaced with and movable relative to each other and defining a passageway for said beam, each of said wall portions comprising first and second wall structures angularly disposed with respect to each other.
Claim 2
Dependent Claim
67 words
An electron beam collimating device, comprising an open ended structure having a substantially rectangular shape, said structure comprising four wall portions of which at least parts are substantially electron impermeable, said wall portions being interlaced with and movable relative to each other and defining a passageway for said beam, each of said wall portions comprising first and second wall structures angularly disposed with respect to each other.
Claim 3
Dependent Claim
40 words
An electron beam collimating device as in claim 1, wherein each of said wall structures comprises joined plural sheets that are interlaced with the respective sheets of another one of said wall structures, said wall structures comprising respective unitary bodies.
Claim 4
Dependent Claim
19 words
An electron beam collimating device as in claim 2, where said wall structures individually comprise a double sheet structure.
Claim 5
Dependent Claim
24 words
An electron beam collimating device as in claim 1, wherein said wall structures comprise openings via which the interior of said device is accessible.
Claim 6
Dependent Claim
25 words
An electron beam collimating device as claimed in claim 1, comprising plural walls and each of said walls comprises two corresponding adjacent said wall structures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |