Patent US3671702A successfully refreshed from Google Patents.
US3671702A
Expired / Lapsed
US
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An electrical contact structure for a switch reed comprising gold and palladium layers
Assignee: Telent Technologies Services Ltd
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Filing: 1971-03-15
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Granted: 1972-06-20
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Expires: 1991-03-15
Abstract
Abstract A switch reed embodies an electrical contact comprising a plurality of layers of electrical contact material disposed on at least one surface of a flattened portion of the reed. A layer of gold of the contact is disposed on the reed surface and at least one of the other layers comprising the contact is of palladium metal.
Inventors
- 👤 Edward S Penczek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:30
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
26 words
The switch reed of claim 1 and including: a layer of silver disposed between and in abutting electrical contact with, said layers of gold and palladium.
Claim 2
Dependent Claim
49 words
The switch reed of claim 2 wherein: said layer of gold has an initial thickness of from 0.000020 to 0.000060 inch; said layer of silver has an initial thickness of from 0.00005 to 0.000020 inch, and said layer of palladium has an initial thickness of from 0.000015 to 0.000120.
Claim 3
Dependent Claim
44 words
The switch reed of claim 2 wherein: the layer of gold has an initial thickness of approximately 0.000045 inch; the layer of silver has an initial thickness of approximately 0.000010 inch, and the layer of palladium as an initial thickness of approximately 0.00005 inch.
Claim 4
Dependent Claim
17 words
The switch reed of claim 2 including: a layer of gold disposed on said layer of palladium.
Claim 5
Dependent Claim
27 words
The switch reed of claim 3 including: a layer of gold of from 0.00005 inch to 0.000030 inch in thickness initially disposed on said layer of palladium.
Claim 6
Dependent Claim
23 words
The switch reed of claim 6 wherein: the layer of gold on said layer of palladium is approximately 0.000015 inch in thickness initially.
Claim 7
Dependent Claim
135 words
A reed switch assembly comprising: an envelope, and a pair of switch reeds, each reed comprising a body of electrically conductive magnetic material having at least an integral flattened end portion, an electrical contact disposed on, and in an electrical conductive relationship with at least a part of one of the surfaces of the flattened portion and initially comprising, before heat treatment, a plurality of electrically conductive metal layers disposed one upon the other and comprising at least a layer of gold disposed on at least one surface of a part of the flattened end portion and a layer of palladium, the flattened portion of each switch reed being incorporated within said envelope and spaced apart from the other flattened portion, the contacts of said reeds being disposed spaced apart and opposed to one another.
Claim 8
Dependent Claim
74 words
The reed switch assembly of claim 8 in which said contact comprises: a layer of silver disposed between and in abutting electrical contact with said layers of gold and palladium; and said layers of gold has an initial thickness of from 0.000020 to 0.000060 inch; said layer of silver has an initial thickness of from 0.000005 to 0.000020 inch, and said layer of palladium has an initial thickness of from 0.000015 to 0.000120 inch.
Claim 9
Dependent Claim
45 words
The reed switch assembly of claim 9 in which: said contact comprises a second layer of gold disposed on, and is an electrically conductive relationship with, said layer of palladium, said layer of gold having an initial thickness of from 0.000005 inch to 0.000030 inch.
Claim 10
Dependent Claim
59 words
The reed switch assembly of claim 10 in which: said layer of gold initially has a thickness of approximately 0.000045 inch; said layer of silver initially has a thickness of approximately 0.000010 inch; said layer of palladium has an initial thickness of approximately 0.00005 inch, and said second layer of gold has an initial thickness of approximately 0.000015 inch.
References Cited (Backward Citations)
US2897584A
Cited
US3214558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |