US3671899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet detent means for a rotary solenoid
Assignee: Honeywell Inc
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Filing: 1971-04-30
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Granted: 1972-06-20
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Expires: 1991-04-30
Abstract
Abstract An electromagnetic rotary solenoid having a permanent magnet rotor and a plurality of selectable coils utilizes the combination of a permanent magnet and a coil for the no signal or detent position to effect a rotation restraining force on the rotor during a no signal input. The circuit effecting the operation of the solenoid simultaneously energizes the appropriate selectable coil and the coil associated with the permanent magnet whereby the selectable coils magnetic field creates a torque acting on the rotor to position it and the magnetic field of the coil associated with the permanent magnet nulls out the restraining force of the permanent magnet.
Inventors
- 👤 Charles E Clift
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:50
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
69 words
A rotary solenoid comprising a stator having at least one selectively energizable electromagnetic pole, a magnetic rotor disposed in operable proximity to said stator and having one pole of said rotor attracted to an energized electromagnetic pole, a magnet attached to said stator for attracting another pole of said rotor, whereby said rotor will rotate to align itself with said magnet in the absence of an energized electromagnetic pole.
Claim 2
Dependent Claim
69 words
A rotary solenoid comprising a stator having at least one selectively energizable electromagnetic pole, a magnetic rotor disposed in operable proximity to said stator and having one pole of said rotor attracted to an energized electromagnetic pole, a magnet attached to said stator for attracting another pole of said rotor, whereby said rotor will rotate to align itself with said magnet in the absence of an energized electromagnetic pole.
Claim 3
Dependent Claim
51 words
The rotary solenoid as claimed in claim 1 wherein one pole end of said rotor is generally pointed, and said another pole end is generally blunt, whereby said pointed end will tend to align itself with said magnet, and said blunt end will tend to align itself with said electromagnetic pole.
Claim 4
Dependent Claim
28 words
The rotary solenoid as claimed in claim 2 including a plurality of stops, whereby the rotation of said rotor in response to said energized electromagnetic pole is limited.
Claim 5
Dependent Claim
79 words
A rotary solenoid comprising a stator having at least one selectively energizable electromagnetic pole, a magnetic rotor disposed in operable proximity to said stator and having one pole thereof attracted to an energized electromagnetic pole, a detent magnet attached to said stator for attracting another pole of said rotor to maintain said rotor in a detent position, means for counteracting the magnetic field of said magnet, and means for initiating said counteracting means upon energization of an electromagnetic pole.
Claim 6
Dependent Claim
79 words
A rotary solenoid comprising a stator having at least one selectively energizable electromagnetic pole, a magnetic rotor disposed in operable proximity to said stator and having one pole thereof attracted to an energized electromagnetic pole, a detent magnet attached to said stator for attracting another pole of said rotor to maintain said rotor in a detent position, means for counteracting the magnetic field of said magnet, and means for initiating said counteracting means upon energization of an electromagnetic pole.
Claim 7
Dependent Claim
19 words
The solenoid as claimed in claim 4 wherein said counteracting means comprises a coil wound about said detent magnet.
Claim 8
Dependent Claim
32 words
The solenoid as claimed in claim 5 wherein said stator comprises a plurality of selectively energizable electromagnetic poles, and wherein said initiating means is operably dependent upon energization of any electromagnetic pole.
Claim 9
Dependent Claim
44 words
The stator as claimed in claim 6 wherein each said electromagnetic pole includes a coil, and said coil wound about said magnet is serially connected to each said electromagnetic pole coil, whereby energization of said electromagnetic pole coil will also energize said magnet coil.
Claim 10
Dependent Claim
33 words
The stator as claimed in claim 4 including a pole piece attached to the pole of said detent magnet extending from said stator, whereby the magnetic flux of said magnet may be focussed.
Claim 11
Dependent Claim
30 words
The rotary solenoid as claimed in claim 4 including a plurality of rotation limiting devices, whereby the rotation of said rotor in response to said energized electromagnetic pole is limited.
Claim 12
Dependent Claim
70 words
The rotor as claimed in claim 4 wherein the end portion of said rotor operably cooperating with said magnet is a generally apex shaped, and the end portion of the rotor operably cooperating with any electromagnetic pole is a generally blunt shaped, whereby the apex shaped end will tend to align itself with said magnet and the blunt shaped end will tend to align itself with said energized eLectromagnetic pole.
Claim 13
Dependent Claim
30 words
The rotary solenoid as claimed in claim 10 including a plurality of rotation limiting devices, whereby the rotation of said rotor in response to said energized electromagnetic pole is limited.
Claim 14
Dependent Claim
34 words
The rotary solenoid as claimed in claim 4 wherein said stator comprises a circular member closed upon itself, and a plurality of electromagnetic poles facing inwardly and toward the center of said circular stator.
Claim 15
Dependent Claim
15 words
The stator as claimed in claim 11 wherein said magnet is attached to said stator.
Claim 16
Dependent Claim
53 words
The stator as claimed in claim 13 including a second magnet, each said magnet being attached to the stator and extending toward the center of said circular stator, second means for counteracting the magnetic field of said second magnet, and means for operating both said counteracting means upon energization of an electromagnetic pole.
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) | 1975-06-20 | 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 |