Patent US4164223A successfully refreshed from Google Patents.
Patent US3594669A successfully refreshed from Google Patents.
US3594669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control device for reed switch
Assignee: Mitsubishi Electric Corp
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Filing: 1969-07-31
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Granted: 1971-07-20
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Expires: 1989-07-31
Abstract
Abstract Four permanent magnets are disposed at predetermined angular intervals equal to an angle of 36* on a circular magnetic substrate by having the S pole faces of the first and fourth magnets and the N pole faces of the second and third magnets fixed to the substrate on a circle concentric to it. With the substrate rotated, a reed switch above it faces successively the first and second magnets to close the switch, the second and third magnets to open the switch, and the third and fourth magnets to again close the switch to permit pulses to be generated.
Inventors
- 👤 Mitsunori Yamane
- 👤 Masayuki Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:17
CPC Classifications
H; H01; H01H; H01H67/00; H01H67/22; H01H67/32; H01H36/00; H01H36/0006; H03; H03K; H03K3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
199 words
A reed switch control device comprising a rotatable disc, at least three permanent magnets disposed on said disc along a circle concentric with an axis of rotation of said disc, wherein each of said magnets has one pole directed outwardly of said disc, and a reed switch mounted adjacent said disc and having a pair of resilient reed-shaped contact strips of magnetic material engageable by and disengageable from each other in response to positioning of said permanent magnets, wherein said magnets include a first said magnet having a second and a third said magnet disposed on opposing sides thereof and spaced equally therefrom so that when said first magnet is disposed adjacent one of said contact strips, one of said second and third magnets is disposed adjacent the other said contact strips, and wherein said outwardly directed poles of said first and second magnets are of opposing polarities and said outwardly directed poles of said first and third magnets have the same polarity, whereby rotation of said disc causes said first and second magnets to attract and close said contact strips, and further rotation of said disc causes said first and third magnets to repel and open said contacts.
Claim 2
Dependent Claim
199 words
A reed switch control device comprising a rotatable disc, at least three permanent magnets disposed on said disc along a circle concentric with an axis of rotation of said disc, wherein each of said magnets has one pole directed outwardly of said disc, and a reed switch mounted adjacent said disc and having a pair of resilient reed-shaped contact strips of magnetic material engageable by and disengageable from each other in response to positioning of said permanent magnets, wherein said magnets include a first said magnet having a second and a third said magnet disposed on opposing sides thereof and spaced equally therefrom so that when said first magnet is disposed adjacent one of said contact strips, one of said second and third magnets is disposed adjacent the other said contact strips, and wherein said outwardly directed poles of said first and second magnets are of opposing polarities and said outwardly directed poles of said first and third magnets have the same polarity, whereby rotation of said disc causes said first and second magnets to attract and close said contact strips, and further rotation of said disc causes said first and third magnets to repel and open said contacts.
Claim 3
Dependent Claim
76 words
A reed switch control device as set forth in claim 1, comprising a fourth permanent magnet disposed on said concentric circle and spaced from said third magnet a distance equal to the distance between said first and third magnets, said outwardly directed pole of said fourth magnet having a polarity opposing that of said third magnet pole, whereby further rotation of said disc causes said third and fourth magnets to attract and close said contact strips.
Claim 4
Dependent Claim
19 words
A reed switch control device as set forth in claim 1, in which said disc comprises a magnetic material.
References Cited (Backward Citations)
US2929896A
Cited
US3233060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |