US3364407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brushless direct current motor
Assignee: Unisys Corp
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Filing: 1962-10-08
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Granted: 1968-01-16
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Expires: 1982-10-08
Abstract
No abstract record available.
Inventors
- 👤 Roy K Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:57
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/14; H02K; H02K29/00; H02K29/06; H02K29/08; H02K29/10; H02K29/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A D.C. POWERED MOTOR COMPRISING A STATIONARY ARMATURE, A ROTOR SURROUNDED BY SAID ARMATURE, AND COMMUTATING MEANS FOR CONTROLLING ENERGIZATION OF SAID ARMATURE; SAID COMMUTATING MEANS INLCUDING VARIABLE IMPEDANCE ELEMENTS AND MEANS, AT LEAST A PORTION OF WHICH IS CARRIED BY SAID ROTOR AND POSITIONED PHYSICALLY REMOTE FROM SAID ELEMENTS FOR VARYING THE IMPEDANCE THEREOF IN ACCORDANCE WITH ROTOR POSITION; AND MEANS ACTIVE AT A PREDETERMINED SPEED OF SAID MOTOR FOR SYNCHORIZING ROTATIONAL SPEED THEREOF IN ACCORDANCE WITH SYNCHORNIZING SIGNALS RECEIVED FROM A SOURCE EXTERNAL TO SAID MOTOR.
Claim 2
Dependent Claim
88 words
A D.C. POWERED MOTOR COMPRISING A STATIONARY ARMATURE, A ROTOR SURROUNDED BY SAID ARMATURE, AND COMMUTATING MEANS FOR CONTROLLING ENERGIZATION OF SAID ARMATURE; SAID COMMUTATING MEANS INLCUDING VARIABLE IMPEDANCE ELEMENTS AND MEANS, AT LEAST A PORTION OF WHICH IS CARRIED BY SAID ROTOR AND POSITIONED PHYSICALLY REMOTE FROM SAID ELEMENTS FOR VARYING THE IMPEDANCE THEREOF IN ACCORDANCE WITH ROTOR POSITION; AND MEANS ACTIVE AT A PREDETERMINED SPEED OF SAID MOTOR FOR SYNCHORIZING ROTATIONAL SPEED THEREOF IN ACCORDANCE WITH SYNCHORNIZING SIGNALS RECEIVED FROM A SOURCE EXTERNAL TO SAID MOTOR.
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) | 1971-01-15 | 1971-07-17 | 1972-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-15 | 1975-07-17 | 1976-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-15 | 1979-07-17 | 1980-01-16 | $7700.00 | Window Closed / Lapsed |