US3265950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-current motor control apparatus
Assignee: Raytheon Co
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Filing: 1964-05-01
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Granted: 1966-08-09
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Expires: 1984-05-01
Abstract
No abstract record available.
Inventors
- 👤 Victor J Modiano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:05
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/03
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
302 words
A MOTOR CONTROL APPARATUS COMPRISING A DIRECTCURRENT POWER SOURCE HAVING FIRST AND SECOND OUTPUT TERMINALS, THE POTENTIAL DEVELOPED AT SAID FIRST OUTPUT TERMINAL BEING POSITIVE RELATIVE TO THE POTENTIAL AT SAID SECOND OUTPUT TERMINAL; A DIRECT-CURRENT MOTOR INCLUDING A SHUNT FIELD WINDING AND AN ARMATURE HAVING FIRST AND SECOND INPUT TERMINALS; MEANS CONNECTED TO SAID SHUNT FIELD WINDING FOR PROVIDING SHUNT FIELD EXCITATION; FIRST AND SECOND SWITCHING MEANS, EACH INCLUDING FIRST AND SECOND PAIRS OF NORMALLY-OPEN CONTACTS AND FIRST AND SECOND PAIRS OF NORMALLY-CLOSED CONTACTS; MEANS FOR PROVIDING CONNECTIONS FROM SAID FIRST OUTPUT TERMINAL OF SAID DIRECT-CURRENT POWER SOURCE IN PARALLEL THROUGH SAID FIRST PAIRS OF NORMALLY-OPEN CONTACTS OF SAID FIRST AND SECOND SWITCHING MEANS TO A FIRST JUNCTION; MEANS FOR PROVIDING CONNECTIONS FROM SAID SECOND OUTPUT TERMINAL OF SAID DIRECT-CURRENT POWER SOURCE IN PARALLEL THROUGH SAID SECOND PAIRS OF NORMALLY-OPEN CONTACTS OF SAID FIRST AND SECOND SWITCHING MEANS TO A SECOND JUNCTION; MEANS FOR PROVIDING CONNECTIONS IN THE ORDER NAMED FROM SAID FIRST INPUT TERMINAL OF SAID ARMATURE SERIALLY THROUGH SAID FIRST PAIR OF NORMALLY-CLOSED CONTACTS OF SAID SECOND TO SAID FIRST JUNCTION AND FROM SAID FIRST JUNCTION SWITCHING MEANS, THROUGH SAID FIRST PAIR OF NORMALLY-CLOSED CONTACTS OF SAID FIRST SWITCHING MEANS TO SAID SECOND INPUT TERMINAL OF SAID ARMATURE; MEANS FOR PROVIDING CONNECTIONS IN THE ORDER NAMED FROM SAID FIRST TERMINAL OF SAID ARMATURE SERIALLY THROUGH SAID SECOND PAIR OF NORMALLY-CLOSED CONTACTS OF SAID FIRST SWITCHING MEANS TO A THIRD JUNCTION AND FROM SAID THIRD JUNCTION SERIALLY THROUGH SAID SECOND PAIR OF NORMALLY-CLOSED CONTACTS OF SAID SECOND SWITCHING MEANS TO SAID SECOND TERMINAL OF SAID ARMATURE; MEANS CONNECTING SAID SECOND JUNCTION TO SAID THIRD JUNCTION; AND A UNIDIRECTIONALLY CONDUCTING DEVICE CONNECTED FROM SAID SECOND JUNCTION TO SAID FIRST JUNCTION AND POLED TO ALLOW NORMAL CURRENT FLOW TOWARD SAID FIRST JUNCTION.
References Cited (Backward Citations)
US1732711A
Cited
US2615152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |