US3584173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reed switch with improved contact isolation
Assignee: CUNNINGHAM CORP
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Filing: 1969-08-13
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Granted: 1971-06-08
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Expires: 1989-08-13
Abstract
Abstract The contact tips of the reeds in a reed switch are rounded and all sharp corners removed. The result is a significant improvement in contact isolation characteristics at high frequencies when the switch is open.
Inventors
- 👤 Larry L Launt
- 👤 Gary E Northrup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:28
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/287; H01H1/00; H01H1/64; H01H1/66
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
61 words
A reed for use in a reed switch capsule, comprising a terminal end portion and a cantilever portion adjoining and extending from said terminal end portion and including a switch contact end, said cantilever portion being characterized by the absence of sharp corners and edges and having full radius curvatures for the height and width contours of said switch contact end.
Claim 2
Dependent Claim
61 words
A reed for use in a reed switch capsule, comprising a terminal end portion and a cantilever portion adjoining and extending from said terminal end portion and including a switch contact end, said cantilever portion being characterized by the absence of sharp corners and edges and having full radius curvatures for the height and width contours of said switch contact end.
Claim 3
Dependent Claim
18 words
A reed according to claim 1 wherein said end contours each comprise at least one radius of curvature.
Claim 4
Dependent Claim
87 words
In a magnetic reed switch with a pair of reeds hermetically sealed in an elongated capsule, said reeds having respective terminal portions attached to respective ends of said capsule and respective cantilever portions adjoining and extending from said terminal portions and including switch contact ends supported in overlapping relation intermediate said capsule ends, the improvement wherein the cantilever portion of each said reed is charactErized by the absence of sharp corners and edges and by full-radius contours along the height and width of the switch contact end.
Claim 5
Dependent Claim
87 words
In a magnetic reed switch with a pair of reeds hermetically sealed in an elongated capsule, said reeds having respective terminal portions attached to respective ends of said capsule and respective cantilever portions adjoining and extending from said terminal portions and including switch contact ends supported in overlapping relation intermediate said capsule ends, the improvement wherein the cantilever portion of each said reed is charactErized by the absence of sharp corners and edges and by full-radius contours along the height and width of the switch contact end.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |