US3579011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid metal cathode with single capillary flow impedance
Assignee: Raytheon Co
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Filing: 1969-01-08
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Granted: 1971-05-18
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Expires: 1989-01-08
Abstract
Abstract The liquid metal cathode is employed as a cathodic electron source in arc discharges. A small liquid metal pool serves as the arcing material, and when it is kept small, improved electron-toatom emission ratios are obtained, as well as gravity independence. However, when such a small pool is employed, feed to the pool must be free of feed rate perturbations. Otherwise, an instability in the level of the mercury in the pool results. The present invention obtains feed rate stability by providing a feed passage with a diameter which is everywhere larger than that of the feed channel which finally discharges to the pool. Feed flow impedance is provided by an elongated capillary feed channel.
Inventors
- 👤 Julius Hyman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:40
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/02; H01J13/04; H01J13/06; H01J13/08; H01J13/14; H01J2893/00; H01J2893/0072; H01J2893/0073; H01J2893/0074; H01J2893/0083
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The feed means of claim 1 wherein said nose of said feed structure is held spaced from said cathode body by said feed tube.
Claim 2
Dependent Claim
44 words
The feed means of claim 1 wherein clamp means is interengaged between said mounting structure and said cathode body to retain said nose in said opening in said cathode body to retain said feed tube in sealing relationship with respect to said feed channel.
Claim 3
Dependent Claim
40 words
The feed means of claim 3 wherein said feed tube is an elongated tube and the major portion of said feed tube is positioned outside of said cathode body to protect said feed tube from heat of said cathode body.
Claim 4
Dependent Claim
48 words
The feed means of claim 4 wherein a housing tube encloses the major portion of said feed tube outside of said cathode body, said housing tube having a wall of sufficient thinness to protect the portion of said feed tube exterior of said cathode body from cathode heat.
Claim 5
Dependent Claim
31 words
The feed means of claim 5 wherein a heat shield tube is positioned around said feed tube, interiorly of said housing tube to further protect said feed tube from cathode heat.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |