US3654377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical leads for cryogenic devices
Assignee: General Electric Co
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Filing: 1969-12-15
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Granted: 1972-04-04
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Expires: 1989-12-15
Abstract
Abstract Heat which is conducted into the cryogenic environment of a cryogenic liquid or gas along an electrical lead of a device immersed therein is shunted into a stack of perforated plates, each spaced from adjacent plates by insulating separators, and each of which is conductively connected by a respective tap to the lead. Vapor evaporated from the bath is passed through the plates which absorb the heat that would otherwise pass through the lead into the bath, thereby reducing the boil-off of liquid from the bath.
Inventors
- 👤 Robert B Fleming
- 👤 Carl H Rosner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:54
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01F; H01F6/00; H01F6/06; H01F6/065; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/884; Y10S505/885; Y10S505/888; Y10S505/898
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
In combination, an elongated electrical lead having a longitudinal axis, a plurality of high conductivity porous plates, a plurality of low conductivity separators, each separator interposed between and in contact with adjacent ones of said plates, each of said plates having an enclosing rim portion, said separators and said plates being aligned to form a longitudinal channel for the passage of fluid therethrough, said plates being situated adjacent to said lead with the said plates being perpendicular to the longitudinal axis of said lead, and means for conductively connecting each of said plates to said lead.
Claim 2
Dependent Claim
96 words
In combination, an elongated electrical lead having a longitudinal axis, a plurality of high conductivity porous plates, a plurality of low conductivity separators, each separator interposed between and in contact with adjacent ones of said plates, each of said plates having an enclosing rim portion, said separators and said plates being aligned to form a longitudinal channel for the passage of fluid therethrough, said plates being situated adjacent to said lead with the said plates being perpendicular to the longitudinal axis of said lead, and means for conductively connecting each of said plates to said lead.
Claim 3
Dependent Claim
30 words
The combination of claim 1 in which said connecting means includes a plurality of tabs, each tab conductively connected between a respective plate and an adjacent point on said lead.
Claim 4
Dependent Claim
20 words
The combination of claim 2 in which said porous plates are plates having a multiplicity of holes with parallel axes.
Claim 5
Dependent Claim
24 words
The combination of claim 3 in which the holes in one plate are nonaligned with the axes of the holes in an adjacent plate.
Claim 6
Dependent Claim
26 words
The combination of claim 1 in which each of said separators is annular in outline and in which each of said plates is circular in outline.
Claim 7
Dependent Claim
21 words
The combination of claim 1 in which the region of each of said plates included between the adjacent separators is nonporous.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |