Patent US2664981A successfully refreshed from Google Patents.
US3673527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reed switch ang magnetic over-center device therefor
Assignee: REDACTRON CORP
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Filing: 1971-02-19
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Granted: 1972-06-27
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Expires: 1991-02-19
Abstract
Abstract A reed switch which is magnetically actuated is provided with a magnetic arrangement which affords an over-center feel or force gradient or curve. The arrangement includes oppositely polarized and spaced magnets between which is located a further magnet which directly operates the reed switch or which is connected to another magnet which operates the switch.
Inventors
- 👤 Edgar Wolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:10
CPC Classifications
H; H01; H01H; H01H36/00; H01H36/0006; H01H36/0013
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
75 words
Apparatus comprising first and second oppositely polarized and spaced permanent magnets, magnet means including a permanent magnet displaceable between said first and second magnets and adapted for being attracted to said first magnet and repelled by said second magnet whereby there is provided an over-center force gradient between said first and second magnets with respect to the third said magnet, and utilization means operatively associated with said magnetic means to be controlled by the latter.
Claim 2
Dependent Claim
75 words
Apparatus comprising first and second oppositely polarized and spaced permanent magnets, magnet means including a permanent magnet displaceable between said first and second magnets and adapted for being attracted to said first magnet and repelled by said second magnet whereby there is provided an over-center force gradient between said first and second magnets with respect to the third said magnet, and utilization means operatively associated with said magnetic means to be controlled by the latter.
Claim 3
Dependent Claim
17 words
Apparatus as claimed in claim 1 wherein said utilization means includes a switch including magnetically operated contacts.
Claim 4
Dependent Claim
60 words
Apparatus as claimed in claim 2 wherein the third said magnet is operatively associated with and operates said contacts. 4. Apparatus as claimed in claim 3 wherein said utilization means includes a further permanent magnet operatively associated with and adapted for operating said contacts, and wherein said magnet means includes a mechanical link connection between said further and third magnet.
Claim 5
Dependent Claim
14 words
Apparatus as claimed in claim 3 wherein the third said magnet encircles said switch.
Claim 6
Dependent Claim
14 words
Apparatus as claimed in claim 3 wherein the third said magnet straddles said switch.
Claim 7
Dependent Claim
20 words
Apparatus as claimed in claim 4 comprising means supporting said link so that the third said magnet is rectilinearly displaceable.
Claim 8
Dependent Claim
20 words
Apparatus as claimed in claim 4 comprising means supporting said link so that the third said magnet is arcuately displaceable.
Claim 9
Dependent Claim
20 words
Apparatus as claimed in claim 2 comprising an actuator cooperatively coupled to the third said magnet for displacing the same.
Claim 10
Dependent Claim
21 words
Apparatus as claimed in claim 9 comprising a housing accommodating said switch and magnets, said actuator extending out of said housing.
Claim 11
Dependent Claim
52 words
Apparatus as claimed in claim 2 wherein the third said magnet has a critical position relative to the switch to cause said contacts to be operated and wherein the first and second magnets are so constructed and arranged to provide a force curve reaching a minimum in correspondence with said critical position.
Claim 12
Dependent Claim
17 words
Apparatus as claimed in claim 1 wherein said first and second magnets are separate from each other.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |