US4117291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reed switch
Assignee: AG Communication Systems Corp
•
Filing: 1977-05-19
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Granted: 1978-09-26
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Expires: 1997-05-19
Abstract
Abstract The cooperating contacts of a reed switch each comprise a layer of palladium. A protective layer of ruthenium deposited on the palladium layer prevents the formation of frictional polymers.
Inventors
- 👤 Bodo G. Gebauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/0201
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A reed switch comprising a sealed envelope, a pair of switch reeds and a pair of cooperating contacts each disposed on a corresponding end of each of said switch reeds wherein each of said contacts comprises an inner layer of palladium and an outer layer of ruthenium including an exterior surface of an oxide of ruthenium.
Claim 2
Dependent Claim
56 words
A reed switch comprising a sealed envelope, a pair of switch reeds and a pair of cooperating contacts each disposed on a corresponding end of each of said switch reeds wherein each of said contacts comprises an inner layer of palladium and an outer layer of ruthenium including an exterior surface of an oxide of ruthenium.
Claim 3
Dependent Claim
17 words
A reed switch in accordance with claim 1 wherein said switch reeds comprise a remanently magnetic material.
Claim 4
Dependent Claim
60 words
A reed switch comprising a sealed envelope, a pair of switch reeds and a pair of cooperating contacts each of said contacts disposed on a corresponding end of each of said switch reeds and comprising an inner layer of gold, an intermediate layer of palladium, and an outer layer of ruthenium including an exterior surface of an oxide of ruthenium.
Claim 5
Dependent Claim
60 words
A reed switch comprising a sealed envelope, a pair of switch reeds and a pair of cooperating contacts each of said contacts disposed on a corresponding end of each of said switch reeds and comprising an inner layer of gold, an intermediate layer of palladium, and an outer layer of ruthenium including an exterior surface of an oxide of ruthenium.
Claim 6
Dependent Claim
26 words
A reed switch in accordance with claim 3 wherein said inner layer of gold is pulse current plated onto the surface of the corresponding switch reed.
Claim 7
Dependent Claim
17 words
A reed switch in accordance with claim 3 wherein said switch reeds comprises a remanently magnetic material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |