US3879626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel electron multiplier having secondary emissive surfaces of different conductivities
Assignee: US Philips Corp
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Filing: 1972-12-14
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Granted: 1975-04-22
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Expires: 1992-12-14
Abstract
Abstract The surface conductive channels in the channel plate have areas of reduced conductivity sufficient to prevent the build-up of electrostatic charges. The areas extend continuously between the input and output electrodes and are normal to the plane of inclination of the channels.
Inventors
- 👤 Derek Washington
- 👤 Andrew John Guest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:51
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
A surface-conducting channel plate of the continuous dynode type, comprising a matrix of elongate channels having polygonal cross-section and extending between two opposite planar and parallel faces of the plate, an input electrode and output electrode provided on said faces, said channels being inclined at an acute angle with respect to one of two substantially orthogonal planes normal to said faces, the conductive inner surface of the plate surrounding each channel having secondary emissive areas facing said one orthogonal plane and extending continuously in the longitudinal direction between said electrodes and further having areas of reduced conductivity extending continuously between said secondary emissive areas and being substantially parallel with the other orthogonal plane.
Claim 2
Dependent Claim
113 words
A surface-conducting channel plate of the continuous dynode type, comprising a matrix of elongate channels having polygonal cross-section and extending between two opposite planar and parallel faces of the plate, an input electrode and output electrode provided on said faces, said channels being inclined at an acute angle with respect to one of two substantially orthogonal planes normal to said faces, the conductive inner surface of the plate surrounding each channel having secondary emissive areas facing said one orthogonal plane and extending continuously in the longitudinal direction between said electrodes and further having areas of reduced conductivity extending continuously between said secondary emissive areas and being substantially parallel with the other orthogonal plane.
Claim 3
Dependent Claim
113 words
A surface-conducting channel plate of the continuous dynode type, comprising a matrix of elongate channels having polygonal cross-section and extending between two opposite planar and parallel faces of the plate, an input electrode and output electrode provided on said faces, said channels being inclined at an acute angle with respect to one of two substantially orthogonal planes normal to said faces, the conductive inner surface of the plate surrounding each channel having secondary emissive areas facing said one orthogonal plane and extending continuously in the longitudinal direction between said electrodes and further having areas of reduced conductivity extending continuously between said secondary emissive areas and being substantially parallel with the other orthogonal plane.
Claim 4
Dependent Claim
113 words
A surface-conducting channel plate of the continuous dynode type, comprising a matrix of elongate channels having polygonal cross-section and extending between two opposite planar and parallel faces of the plate, an input electrode and output electrode provided on said faces, said channels being inclined at an acute angle with respect to one of two substantially orthogonal planes normal to said faces, the conductive inner surface of the plate surrounding each channel having secondary emissive areas facing said one orthogonal plane and extending continuously in the longitudinal direction between said electrodes and further having areas of reduced conductivity extending continuously between said secondary emissive areas and being substantially parallel with the other orthogonal plane.
Claim 5
Dependent Claim
16 words
A plate as claimed in claim 1 wherein the channels have substantially square or rectangular cross-sections
Claim 6
Dependent Claim
16 words
A plate as claimed in claim 2 wherein the angle of inclination Alpha is approximately 13*.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |