US3885186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lamp cap connections using superplastic alloy
Assignee: EMI Group Ltd
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Filing: 1974-04-01
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Granted: 1975-05-20
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Expires: 1994-04-01
Abstract
Abstract Electric lamps are disclosed having lead-in wires which extend out of the lamp envelopes and are connected to external electrical terminals, the terminals including hollow metal sleeves receiving the wires and the wires being joined thereto using alloys which exhibit superplastic behaviour, the alloys being heated, without melting, and caused to flow or creep superplastically into the sleeves and around the wires.
Inventors
- 👤 Arthur Samuel Vause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:53
CPC Classifications
H; H01; H01J; H01J5/00; H01J5/50; H01J5/54; H01J5/62
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
44 words
An electric lamp having an hermetically-sealed envelope through which a lead-in conductor is sealed, said conductor terminating outside said envelope and said conductor being embedded in a mass of an alloy which is capable of exhibiting superplastic properties, said alloy forming an electrical terminal.
Claim 2
Dependent Claim
44 words
An electric lamp having an hermetically-sealed envelope through which a lead-in conductor is sealed, said conductor terminating outside said envelope and said conductor being embedded in a mass of an alloy which is capable of exhibiting superplastic properties, said alloy forming an electrical terminal.
Claim 3
Dependent Claim
19 words
A lamp according to claim 1, wherein said alloy is contained within a well having a re-entrant wall portion.
Claim 4
Dependent Claim
16 words
A lamp according to claim 1, wherein said well is defined by a hollow metal ferrule.
Claim 5
Dependent Claim
77 words
A lamp according to claim 1, wherein said lamp has a base attached to said envelope, said base comprising a shell, a body of insulating material inside said shell, said conductor extending through said insulating body and entering a hollow metal ferrule defining said well said ferrule being located at the end of said base remote from said envelope, and said ferrule containing a mass of said alloy forming a joint between said ferrule and said conductor.
Claim 6
Dependent Claim
38 words
A lamp according to claim 1, wherein said conductor enters and terminates within a hollow metal sleeve, said alloy filling said sleeve and forming a joint between said sleeve and said conductor, said sleeve constituting a pin terminal.
Claim 7
Dependent Claim
23 words
A lamp according to claim 5, wherein said sleeve has a reentrant portion, and the end of said conductor has an irregularity therein.
Claim 8
Dependent Claim
24 words
A lamp according to claim 1, wherein said alloy is one which is capable of exhibiting superplastic behaviour at temperatures within the range 200*-500*C.
Claim 9
Dependent Claim
24 words
A lamp according to claim 7, wherein said alloy is one which is capable of exhibiting superplastic behaviour at temperatures within the range 250*-300*C.
Claim 10
Dependent Claim
22 words
A lamp according to claim 8, wherein the composition of said alloy is 22 weight % aluminium - 78 weight % Zinc.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |