US4164777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superconducting switch incorporating a steering diode
Assignee: Varian Medical Systems Inc
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Filing: 1978-02-21
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Granted: 1979-08-14
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Expires: 1998-02-21
Abstract
Abstract A persistence switch comprises a diode and superconductive wire in thermal contact with the diode. The heat evolved by current through the forward biased diode raises the temperature of the superconductor above the transition temperature. The diode characteristic of the switch permits a plurality of such switches to be arranged in a network for selection by a relatively few signal conductors.
Inventors
- 👤 George D. Kneip, Jr.
- 👤 Marvin H. Anderson
- 👤 Robert E. Gang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:51
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/381; G01R33/3815; H; H01; H01F; H01F6/00; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/831; Y10S505/838; Y10S505/856; Y10S505/857; Y10S505/86
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A persistence switch for effecting the transition between persistent and non-persistent modes in a superconducting circuit comprising a diode having leads, a superconductive material disposed in thermal contact with said diode, said material forming two superconductive leads of said switch, and two other leads connected to the respective leads of said diode, said other leads formed of a material exhibiting lower thermal conductivity than the leads of said diode.
Claim 2
Dependent Claim
69 words
A persistence switch for effecting the transition between persistent and non-persistent modes in a superconducting circuit comprising a diode having leads, a superconductive material disposed in thermal contact with said diode, said material forming two superconductive leads of said switch, and two other leads connected to the respective leads of said diode, said other leads formed of a material exhibiting lower thermal conductivity than the leads of said diode.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein the material forming said other leads is manganin.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1 wherein at least one of said other leads secures said superconductive material in thermal contact with said diode.
Claim 5
Dependent Claim
19 words
The apparatus of claim 1 wherein said swtich is housed within an insulating sleeve and said sleeve is sealed.
Claim 6
Dependent Claim
22 words
The apparatus of claim 4 wherein the interior of said housing formed from said insulating sleeve is filled with an epoxy resin.
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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |