US3621111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead-in conductor for electrical devices
Assignee: General Electric Co
•
Filing: 1970-07-01
•
Granted: 1971-11-16
•
Expires: 1990-07-01
Abstract
Abstract A lead-in conductor and method of manufacture for use in electrical devices. The lead-in conductor comprises outer and inner lead wires, a foil and a tab material of a specific melting point such that the tab material melts to form a high-currentcarrying joint between the lead wires and the foil.
Inventors
- 👤 George K Danko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:58
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/40
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
113 words
In an electrical device, a highly conductive hightemperature-resisting and gastight fused silica seal surrounding lead-in conductors comprising, in combination, a thin refractory metal foil section, separate electrical conductors, thin metal tabs fused between and joining said foil and conductors respectively to provide a conductive path through said conductors and foil, a heat-deformed fused silica envelope surrounding and engaging said foil and conductors and being hermetically sealed to said foil, the metal material of said tabs having a melting point approximately the same as the softening point of said silica envelope, said tab material being an alloy whose constituent parts are selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum.
Claim 2
Dependent Claim
113 words
In an electrical device, a highly conductive hightemperature-resisting and gastight fused silica seal surrounding lead-in conductors comprising, in combination, a thin refractory metal foil section, separate electrical conductors, thin metal tabs fused between and joining said foil and conductors respectively to provide a conductive path through said conductors and foil, a heat-deformed fused silica envelope surrounding and engaging said foil and conductors and being hermetically sealed to said foil, the metal material of said tabs having a melting point approximately the same as the softening point of said silica envelope, said tab material being an alloy whose constituent parts are selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum.
Claim 3
Dependent Claim
20 words
An electrical device as stated in claim 1 wherein said tab material is 92 percent palladium and 8 percent ruthenium.
References Cited (Backward Citations)
US3105867A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |