Patent US3452742A successfully refreshed from Google Patents.
US3603828A
Expired / Lapsed
US
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X-ray image intensifier tube with secondary emission multiplier tunnels constructed to confine the x-rays to individual tunnels
Assignee: UNITED JEWISH APPEAL OF GREATER NEW YORK
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Filing: 1969-01-28
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Granted: 1971-09-07
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Expires: 1989-01-28
Abstract
Abstract This invention relates to image intensifiers of multiplier type and which are especially useful for X-ray images. The novel device is characterized by construction in which each of the discrete X-ray beams corresponding to individual image points strikes the multiplying channel and is prevented from impinging in addition on adjacent multiplying channels. It is found that in order to accomplish this objective the lateral deviation of said multiplying channels between their entrance apertures and their exit apertures cannot exceed l mm.; and in addition that the difference of the level of said entrance apertures and said exit apertures cannot exceed 1 mm.
Inventors
- 👤 Edward Emanuel Sheldon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:53
CPC Classifications
H; H01; H01J; H01J31/00; H01J31/08; H01J31/50; H01J31/506; H01J31/507; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
A vacuum tube for the intensifying of X-ray images formed by a beam of X-radiation comprising a plurality of pencils of said X-radiation, each of said pencils corresponding to one image point, said tube comprising in combination X-ray-reactive means absorbing a part of said radiation and converting into a beam of electrons having the pattern of said X-radiation image, an electron multiplying device, said device receiving said beam of electrons and also the part of X-radiation transmitted through said X-ray-reactive means, said electron-multiplying device comprising a plurality of separate individual empty tunnels, said tunnels having entrance apertures for the entrance of said beam of electrons and exit apertures for the exit of electrons, said tunnels having configuration of the longitudinal axis between said entrance and said exit apertures in which lateral deviation from a straight line, is not exceeding 1 mm. and preventing each of said X-ray pencils corresponding to individual image points from impinging on more than one of said hollow tunnels during the passage through said electron-multiplying device, said vacuum tube comprising furthermore means for receiving and utilizing said beam of electrons exited from said apertures, in said device furthermore the difference of the level of said exit apertures in relation to the level of said entrance apertures not exceeding 1 mm.
Claim 2
Dependent Claim
214 words
A vacuum tube for the intensifying of X-ray images formed by a beam of X-radiation comprising a plurality of pencils of said X-radiation, each of said pencils corresponding to one image point, said tube comprising in combination X-ray-reactive means absorbing a part of said radiation and converting into a beam of electrons having the pattern of said X-radiation image, an electron multiplying device, said device receiving said beam of electrons and also the part of X-radiation transmitted through said X-ray-reactive means, said electron-multiplying device comprising a plurality of separate individual empty tunnels, said tunnels having entrance apertures for the entrance of said beam of electrons and exit apertures for the exit of electrons, said tunnels having configuration of the longitudinal axis between said entrance and said exit apertures in which lateral deviation from a straight line, is not exceeding 1 mm. and preventing each of said X-ray pencils corresponding to individual image points from impinging on more than one of said hollow tunnels during the passage through said electron-multiplying device, said vacuum tube comprising furthermore means for receiving and utilizing said beam of electrons exited from said apertures, in said device furthermore the difference of the level of said exit apertures in relation to the level of said entrance apertures not exceeding 1 mm.
Claim 3
Dependent Claim
24 words
A device as defined in claim 1, which comprises in addition means producing pulses of unidirectional electrical potential and connected to said electron-multiplying device.
Claim 4
Dependent Claim
69 words
A device as defined in claim 1, in which the end wall of said tube comprises a two-dimensional array of light-conducting members, said members having a core of material of a high index of refraction and provided with coating means of a lower index of refraction than said core and having the thickness not exceeding a few microns, said precoated members united together and conducting light by internal reflection.
Claim 5
Dependent Claim
57 words
A vacuum tube as defined in claim 1, in which said electron-multiplying device comprises plurality of individual hollow members united together, and in which said vacuum tube comprises furthermore a screen for receiving said exited electrons and an imperforate and electron-transmitting member mounted between said X-ray reactive means and said screen and spaced apart from said screen.
Claim 6
Dependent Claim
23 words
A vacuum tube as defined in claim 2, in which at least two of said electron-multiplying devices are mounted adjacent to each other.
Claim 7
Dependent Claim
55 words
A device as defined in claim 2, in which said electron-multiplying device comprises plurality of individual hollow members united together, and in which said vacuum tube comprises furthermore a screen for receiving said exited electrons and an imperforate and electron-transmitting member mounted between said X-ray-reactive means and said screen and spaced apart from said screen.
Claim 8
Dependent Claim
21 words
A device as defined in claim 3, in which at least two said electron-multiplying devices are mounted adjacent to each other.
Claim 9
Dependent Claim
20 words
A device as defined in claim 4, in which said electron-multiplying device comprises plurality of individual hollow members united together.
Claim 10
Dependent Claim
21 words
A device as defined in claim 3, in which at least two said electron-multiplying devices are mounted adjacent to each other.
Claim 11
Dependent Claim
11 words
A device as defined in claim 8, which comprises fluorescent means.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |