Patent US3248629A successfully refreshed from Google Patents.
US3248629A
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Motor control system and torque indicating means
Assignee: DYNA SYSTEMS Inc
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Filing: 1960-03-14
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Granted: 1966-04-26
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Expires: 1980-03-14
Abstract
No abstract record available.
Inventors
- 👤 Rollin A Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:18
CPC Classifications
B; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/12; B23Q11/00; B23Q11/04; B23Q5/00; B23Q5/22; B23Q5/34; B23Q5/36; H; H02; H02P; H02P29/00; H02P29/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR HAVING AN ARMATURE CIRCUIT AND A SEPARATELY EXCITED FIELD CIRCUIT, COMPRISING: A D.C. PULSATING POTENTIAL SOURCE CONNECTED TO THE ARMATURE CIRCUIT OF SAID MOTOR; MEANS FOR VARYING THE POTENTIAL OF SAID SOURCE TO ADJUSTABLY CONTROL THE TORQUE OF SAID MOTOR; ELECTRONIC GATING MEANS IN THE CONNECTION FROM THE POSITIVE TERMINAL OF SAID SOURCE TO SAID ARMATURE; AND MEANS FOR CONTROLLING SAID GATING MEANS SO AS TO SUPPLY SAID ARMATURE, SAID GATING MEANS HAVING A CATHODE ELECTRODE CONNECTED TO ONE SIDE OF THE ARMATURE, AND A GATE CONTROL ELECTRODE WITH SPACED ENERGIZING PULSES IN ACCORDANCE WITH AN OPERATING CHARACTERISTIC OF SAID ARMATURE, SAID CONTROL MEANS COMPRISING A GATE
Claim 2
Dependent Claim
115 words
A CONTROL SYSTEM FOR A DIRECT CURRENT MOTOR HAVING AN ARMATURE CIRCUIT AND A SEPARATELY EXCITED FIELD CIRCUIT, COMPRISING: A D.C. PULSATING POTENTIAL SOURCE CONNECTED TO THE ARMATURE CIRCUIT OF SAID MOTOR; MEANS FOR VARYING THE POTENTIAL OF SAID SOURCE TO ADJUSTABLY CONTROL THE TORQUE OF SAID MOTOR; ELECTRONIC GATING MEANS IN THE CONNECTION FROM THE POSITIVE TERMINAL OF SAID SOURCE TO SAID ARMATURE; AND MEANS FOR CONTROLLING SAID GATING MEANS SO AS TO SUPPLY SAID ARMATURE, SAID GATING MEANS HAVING A CATHODE ELECTRODE CONNECTED TO ONE SIDE OF THE ARMATURE, AND A GATE CONTROL ELECTRODE WITH SPACED ENERGIZING PULSES IN ACCORDANCE WITH AN OPERATING CHARACTERISTIC OF SAID ARMATURE, SAID CONTROL MEANS COMPRISING A GATE
References Cited (Backward Citations)
US2308620A
Cited
US2329127A
Cited
US2288295A
Cited
US2548709A
Cited
US2548307A
Cited
US2593450A
Cited
US2653289A
Cited
US2753507A
Cited
US2975349A
Cited
US2929010A
Cited
US2977523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |