Patent US3739206A successfully refreshed from Google Patents.
US3739206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepwise running electromagnetic motor
Assignee: Omega Louis Brandt and Frere SA
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Filing: 1972-01-04
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Granted: 1973-06-12
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Expires: 1992-01-04
Abstract
Abstract The stepwise running motor includes a disc shaped rotor having a plurality of magnets arranged in a generally circular manner. The magnets are of alternating plurality and the field of the magnets follows a direction parallel to the shaft of the rotor. The rotor is located between two annular pole pieces each of which has a plurality of pole shoes also arranged in a generally circular manner, the number of pole shoes being equal to half the number of the magnets of the rotor. The axial side of each of the shoes which faces the rotor between the pole pieces is cut at least partially slantwise with respect to a plane at a right angle to the motor shaft such that a transient magnetic field generated in the polar pieces produces stepwise forward motion of the rotor.
Inventors
- 👤 Joch M Schwarzmuller
- 👤 M Schwab
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:25
CPC Classifications
G; G04; G04C; G04C13/00; G04C13/08; G04C13/10; G04C13/11; H; H02; H02K; H02K37/00; H02K37/10; H02K37/12; H02K37/125
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
Stepwise running electromagnetic motor characterized by the fact that it comprises a disc shaped rotor which carries a plurality of magnets arranged in a generally circular manner, said magnets being of alternating polarity and the field of which follows a direction parallel to the shaft of said rotor, the latter being located between two annular polar pieces each being provided with pole shoes also arranged in a generally circular manner , the number of which is equal to half the number of magnets of the rotor, and opposite which said magnets are moving when the rotor is running, the axial side of said shoes which faces the rotor being cut at least partially slantwise with respect to a plane at right angle to the motor shaft, so that a transient magnetic field generated in said polar pieces produces the stepwise forward motion of the rotor.
Claim 2
Dependent Claim
145 words
Stepwise running electromagnetic motor characterized by the fact that it comprises a disc shaped rotor which carries a plurality of magnets arranged in a generally circular manner, said magnets being of alternating polarity and the field of which follows a direction parallel to the shaft of said rotor, the latter being located between two annular polar pieces each being provided with pole shoes also arranged in a generally circular manner , the number of which is equal to half the number of magnets of the rotor, and opposite which said magnets are moving when the rotor is running, the axial side of said shoes which faces the rotor being cut at least partially slantwise with respect to a plane at right angle to the motor shaft, so that a transient magnetic field generated in said polar pieces produces the stepwise forward motion of the rotor.
Claim 3
Dependent Claim
41 words
Stepwise running electromagnetic motor as claimed in claim 1, characterized by the fact that the disc constituting the rotor is provided, at its periphery, with a series of radial notches, and, between them, a series of crown segments constituting said magnets.
Claim 4
Dependent Claim
41 words
Stepwise running electromagnetic motor as claimed in claim 1, characterized by the fact that each of the polar pieces is generally annular having, at its periphery, a series of radial notches, and between them, crown segments which constitute said pole shoes.
Claim 5
Dependent Claim
55 words
Stepwise running electromagnetic motor as claimed in claim 3, characterized by the fact that each pole shoe is provided, on its side facing the rotor, with two inclined surfaces each ajdacent to one of the the notches limiting said shoe, the planar surfaces adjacent each notch lying in planes forming, between them, a convex dihedron.
Claim 6
Dependent Claim
47 words
Stepwise running electromagnetic motor according to claim 4, characterized by the fact that the inclinded plane of each pole shoe is separated, in the middle of said shoe, by the flat portion lying in a plane which is at substantially a right angle to the motor shaft.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |