Patent US4140613A successfully refreshed from Google Patents.
US4140613A
Expired / Lapsed
US
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Sealed terminal
Assignee: Mitsubishi Electric Corp
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Filing: 1977-08-09
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Granted: 1979-02-20
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Expires: 1997-08-09
Abstract
Abstract A sealed terminal of invention is used for a metal vessel containing water and has improved characteristics such as anticorrosive characteristics, water sealing characteristic and high mechanical strength and insulating characteristic. A terminal conductor of an auxiliary anode is seal-bonded in a terminal opening of the metal vessel with an insulator comprising mica and glassy material and which is softened at a temperature lower than about 900° C. and is plastic deformable under compression.
Inventors
- 👤 Takeo Inoue
- 👤 Takashi Shirasawa
- 👤 Takeki Nishikori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:17
CPC Classifications
F; F24; F24H; F24H9/00; F24H9/0005
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A sealed terminal for mounting in a vessel which comprises: a terminal conductor comprising titanium coated by platinum plating; an insulator comprising mica and a glassy material including a terminal opening disposed therein and within which said terminal conductor is seal-bonded; and, a substrate member comprising iron interconnecting said insulator and said vessel and including a screw formed outer surface which operatively engages said vessel.
Claim 2
Dependent Claim
65 words
A sealed terminal for mounting in a vessel which comprises: a terminal conductor comprising titanium coated by platinum plating; an insulator comprising mica and a glassy material including a terminal opening disposed therein and within which said terminal conductor is seal-bonded; and, a substrate member comprising iron interconnecting said insulator and said vessel and including a screw formed outer surface which operatively engages said vessel.
Claim 3
Dependent Claim
28 words
A sealed terminal according to claim 1 wherein the coefficients of linear expansion of said substrate, said insulator and said terminal conductor are respectively lower in said order.
Claim 4
Dependent Claim
43 words
A sealed terminal according to claim 2, wherein the coefficient of linear expansion from 400° C. to room temperature is 11.5 × 10 -6 for the substrate, 9.5 × 10 -6 for the insulator, and 8.8 × 10 -6 for the terminal conductor.
Claim 5
Dependent Claim
22 words
A sealed terminal according to claim 1 wherein said glassy material is glass which does not substantially contain lead, cadmium and barium.
Claim 6
Dependent Claim
14 words
A sealed terminal according to claim 1 wherein said mica comprises artificial phlogopite fluorine.
Claim 7
Dependent Claim
30 words
A sealed terminal according to claim 1 wherein said terminal conductor is adapted for application of positive electrical potential and said substrate is adapted for application of negative electrical potential.
Claim 8
Dependent Claim
27 words
A sealed terminal according to claim 6 wherein said insulator is disposed so as to project from said terminal opening to the inner direction of said substrate.
Claim 9
Dependent Claim
15 words
A sealed terminal according to claim 1, wherein said glassy material comprises glaze of enamel.
References Cited (Backward Citations)
US2949376A
Cited
US4039417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |