US3612946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron multiplier device using semiconductor ceramic
Assignee: Murata Manufacturing Co Ltd
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Filing: 1968-08-01
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Granted: 1971-10-12
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Expires: 1988-08-01
Abstract
Abstract An electron multiplier device. A solid body of barium titanate semiconducting ceramic is formed into a tube or plurality of tubes and at least two electrodes are positioned at spaced points on the tube. The ceramic has a resistance-temperature characteristic which is other than negative, i.e. zero or positive. The device can be used in form of a single tube, or a plurality of such tubes can be bundled together. Electrons fed into the tube or tubes impact with the semiconducting ceramic causing secondary electron emission and a greater number of electrons are emitted than are fed to the device.
Inventors
- 👤 Minoru Toyoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:21
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/18; H01J43/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
14 words
An electron multiplier device according to claim 1 wherein said body is a tube.
Claim 2
Dependent Claim
13 words
An electron multiplier device according to claim 2 wherein said tube is cylindrical.
Claim 3
Dependent Claim
13 words
An electron multiplier device according to claim 2 wherein said tube is polygonal.
Claim 4
Dependent Claim
32 words
An electron multiplier device according to claim 1 wherein said body is a rectangular block with electrodes on opposite faces thereof and has a plurality of holes therethrough perpendicular to the electrodes.
Claim 5
Dependent Claim
46 words
An electron multiplier device comprising a Plurality of hollow tubes each being of a solid BaTi03 family semiconducting ceramic having a resistance-temperature characteristic which is other than negative and each having two electrodes of a conductive material thereon, said tubes being bundled together in a bundle.
Claim 6
Dependent Claim
17 words
An electron multiplier device as claimed in claim 6 in which said tubes are cylindrical and straight.
Claim 7
Dependent Claim
37 words
An electron multiplier device according to claim 6 wherein said tubes are triangular in cross section and straight and are stacked in the shape of a pyramid and define triangular cross-sectional spaces between each three stacked tubes.
Claim 8
Dependent Claim
43 words
An electron multiplier device according to claim 6 wherein said tubes are polygonal tubes having grooves in at least some of the sides and said grooves are opposed to corresponding grooves in adjacent tubes in the bundle to form bores through said bundle.
Claim 9
Dependent Claim
19 words
An electron multiplier device according to claim 6 wherein the plurality of tubes are mutually twisted around each other.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |