US3564323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary-electron multiplier having tilted elliptical pipes the ends of which are obliquely cut
Assignee: Panasonic Holdings Corp
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Filing: 1968-11-08
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Granted: 1971-02-16
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Expires: 1988-11-08
Abstract
Abstract A secondary-electron multiplier of the channel type having a plurality of channel pipes combined in the form of a bundle. In the multiplier, the channel pipes are arranged to make an angle with respect to the advancing direction of primary electrons and have an oval cross-sectional shape, while the opposite ends of the channel pipes are cut to have a substantially circular section.
Inventors
- 👤 Haruo Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
A channel-type secondary-electron multiplier comprising a plurality of channel pipes each having an inlet end and an outlet end, each said channel pipe having an inside surface of secondary-electron emissive nature, each said channel having an elliptical cross-sectional shape with said inlet and outlet ends cut at an oblique angle with respect to the longitudinal axis of said pipes whereby said ends have a substantially circular section.
Claim 2
Dependent Claim
67 words
A channel-type secondary-electron multiplier comprising a plurality of channel pipes each having an inlet end and an outlet end, each said channel pipe having an inside surface of secondary-electron emissive nature, each said channel having an elliptical cross-sectional shape with said inlet and outlet ends cut at an oblique angle with respect to the longitudinal axis of said pipes whereby said ends have a substantially circular section.
Claim 3
Dependent Claim
48 words
A multiplier according to claim 1 wherein said pipes are stacked in the form of a bundle mounted with its longitudinal axis at an oblique angle with respect to the advancing direction of the primary electrons whereby said inlet and outlet ends are substantially perpendicular to said direction.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |