Patent US3204136A successfully refreshed from Google Patents.
US3204136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-phase stepping motor
Assignee: Fujitsu Ltd
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Filing: 1961-06-02
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Granted: 1965-08-31
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Kaiwa Toshimasa
- 👤 Iwai Rinzo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:34
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/02; H02K37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
238 words
A TWO-PHASE STEPPING MOTOR COMPRISING COAXIAL STATOR AND ROTOR MEMBERS EACH HAVING CIRCULAR CIRCUMFERENCES AND ONE OF WHICH HAS TWO SETS OF CIRCUMFERENTIALLY-SPACED POLES, THE ROTOR MEMBER BEING AXIALLY SHIFTABLE RELATIVE TO THE STATOR MEMBER SO AS TO TAKE TWO DIFFERENT POSITIONS, MEANS FOR ALTERNATELY ENERGIZING ALTERNATE CIRCUMFERENTIALLY-SPACED POLES OF BOTH SETS OF POLES OF ONE OF SAID MEMBERS, EACH POLE ON THE ONE OF SAID MEMBERS INCLUDING TWO FLAT OVERLYING PIECES HAVING RESPECTIVE EDGES TRANSVERSE TO THE CIRCUMFERENCE OF THE MEMBERS, THE EDGES OF PIECES OF A FIRST SET OF SAID SETS OF POLES COINCIDING WITH ONE ANOTHER AT ONE EDGE AND THOSE OF PIECES BELONGING TO A SECOND SET OF SAID SET OF POLES COINCIDING WITH ONE ANOTHER AT THEIR RESPECTIVE OTHER EDGES, POLES ON THE OTHER OF SAID MEMBERS AT ONE OF THE SAID ROTOR MEMBER POSITIONS CONFRONTING ALTERNATE ONE OF THE FIRST SET OF THE POLES OF SAID ONE OF SAID MEMBERS SO AS TO ROTATE THE ROTOR MEMBER EXCLUSIVELY IN THE DIRECTION DETERMINED BY THE ARRANGEMENT OF THE POLE PIECES OF THE FIRST SET OF SAID SETS OF POLES, SAID POLES ON THE OTHER OF SAID MEMBERS CONFRONTING THE SECOND SET OF POLES ON SAID ONE OF SAID MEMBERS AT THE OTHER ROTOR MEMBER POSITION SO AS TO ROTATE SAID ROTOR MEMBERS IN THE REVERSE DIRECTION DETERMINED BY THE ARRANGEMENT OF THE POLE PIECES OF THE SECOND SET OF SAID SETS OF POLES.
Claim 2
Dependent Claim
238 words
A TWO-PHASE STEPPING MOTOR COMPRISING COAXIAL STATOR AND ROTOR MEMBERS EACH HAVING CIRCULAR CIRCUMFERENCES AND ONE OF WHICH HAS TWO SETS OF CIRCUMFERENTIALLY-SPACED POLES, THE ROTOR MEMBER BEING AXIALLY SHIFTABLE RELATIVE TO THE STATOR MEMBER SO AS TO TAKE TWO DIFFERENT POSITIONS, MEANS FOR ALTERNATELY ENERGIZING ALTERNATE CIRCUMFERENTIALLY-SPACED POLES OF BOTH SETS OF POLES OF ONE OF SAID MEMBERS, EACH POLE ON THE ONE OF SAID MEMBERS INCLUDING TWO FLAT OVERLYING PIECES HAVING RESPECTIVE EDGES TRANSVERSE TO THE CIRCUMFERENCE OF THE MEMBERS, THE EDGES OF PIECES OF A FIRST SET OF SAID SETS OF POLES COINCIDING WITH ONE ANOTHER AT ONE EDGE AND THOSE OF PIECES BELONGING TO A SECOND SET OF SAID SET OF POLES COINCIDING WITH ONE ANOTHER AT THEIR RESPECTIVE OTHER EDGES, POLES ON THE OTHER OF SAID MEMBERS AT ONE OF THE SAID ROTOR MEMBER POSITIONS CONFRONTING ALTERNATE ONE OF THE FIRST SET OF THE POLES OF SAID ONE OF SAID MEMBERS SO AS TO ROTATE THE ROTOR MEMBER EXCLUSIVELY IN THE DIRECTION DETERMINED BY THE ARRANGEMENT OF THE POLE PIECES OF THE FIRST SET OF SAID SETS OF POLES, SAID POLES ON THE OTHER OF SAID MEMBERS CONFRONTING THE SECOND SET OF POLES ON SAID ONE OF SAID MEMBERS AT THE OTHER ROTOR MEMBER POSITION SO AS TO ROTATE SAID ROTOR MEMBERS IN THE REVERSE DIRECTION DETERMINED BY THE ARRANGEMENT OF THE POLE PIECES OF THE SECOND SET OF SAID SETS OF POLES.
References Cited (Backward Citations)
US3005118A
Cited
US2808556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |