Patent US3745495A successfully refreshed from Google Patents.
US3745495A
Expired / Lapsed
US
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Magnetic actuator mechanism
Assignee: International Business Machines Corp
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Filing: 1971-12-16
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Granted: 1973-07-10
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Expires: 1991-12-16
Abstract
Abstract A magnetic actuator comprising a stationary magnetic core structure having two distinct magnetic flux paths, with a movable armature included in both the flux paths and movable between a rest position and an actuated position. A permanent magnet or winding provides reset or restore flux, and a first winding includes the armature and opposes the restore flux. A second winding provides the major armature attractive force.
Inventors
- 👤 H Chai
- 👤 S Mills
- 👤 C Young
- 👤 J Pawletko
- 👤 F Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/26; B41J9/38; H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
An electromagnetic actuator mechanism comprising, in combination, an armature pivoted at one end for rotation about the pivot axis, between a reset position and an operated position, a reset flux magnetic circuit including a permanent magnet and having a U-shaped configuration with the legs of the circuit being bridged by the armature when the armature is in its reset position, an operating flux magnetic circuit including a source of operating flux and having a U-shaped configuration with the legs of the circuit being bridged by the armature when the armature is in its operated position, and opposing flux means for generating opposing flux which opposes said reset flux during at least a portion of the time said operating flux is effective.
Claim 2
Dependent Claim
121 words
An electromagnetic actuator mechanism comprising, in combination, an armature pivoted at one end for rotation about the pivot axis, between a reset position and an operated position, a reset flux magnetic circuit including a permanent magnet and having a U-shaped configuration with the legs of the circuit being bridged by the armature when the armature is in its reset position, an operating flux magnetic circuit including a source of operating flux and having a U-shaped configuration with the legs of the circuit being bridged by the armature when the armature is in its operated position, and opposing flux means for generating opposing flux which opposes said reset flux during at least a portion of the time said operating flux is effective.
Claim 3
Dependent Claim
28 words
An electromagnetic actuator mechanism as claimed in claim 1, in which said reset flux circuit permanent magnet is disposed in the central portion of the reset magnetic circuit.
Claim 4
Dependent Claim
21 words
An electromagnetic actuator mechanism, as claimed in claim 1, in which said opposing flux means comprises a winding linking said armature.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |