Patent US3264540A successfully refreshed from Google Patents.
US3264540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of controlling speed of electric drive motor of industrial truck
Assignee: Eaton Corp
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Filing: 1962-03-29
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Granted: 1966-08-02
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Expires: 1982-03-29
Abstract
No abstract record available.
Inventors
- 👤 Alan C Dannettell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:14
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; B; B60; B60L; B60L15/00; B60L15/02; B60L15/04; B60L50/00; B60L50/50; B60L50/52; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
280 words
A SYSTEM FOR CONTROLLING THE SPEED OF A BATTERY OPERATED ELECTRIC TRACTION MOTOR OF AN INDUSTRIAL TRUCK HAVING AN ARMATURE AND TWO FIELD WINDINGS COMPRISING, FIRST AND SECOND BATTERIES, TWO UNI-DIRECTIONAL CONDUCTORS, A RESISTOR, MEANS FOR CONNECTING THE TWO BATTERIES IN PARALLEL WITH EACH OTHER, WITH ONE BATTERY BEING CONNECTED IN PARALLEL THROUGH ONE UNI-DIRECTIONAL CONDUCTOR IN SERIES THEREWITH IN A POSITION OF OPPOSITE POLARITY FROM THAT OF THE OTHER BATTERY AND THE OTHER BATTERY CONNECTED IN PARALLEL THROUGH THE OTHER UNI-DIRECTIONAL CONDUCTOR IN SERIES THEREWITH IN A POSITION OF OPPOSITE POLARITY FROM THAT OF THE ONE BATTERY, FOR CONNECTING THE TWO FIELD WINDINGS IN SERIES, AND FOR CONNECTING THE PARALLEL CONNECTED BATTERIES, THE SERIES CONNECTED FIELD WINDINGS AND THE RESISTOR IN SERIES WITH THE ARMATURE OF THE MOTOR TO OBTAIN A FIRST SPEED, MEANS FOR SHORT CIRCUITING THE RESISTOR TO OBTAIN A SECOND SPEED, MEANS FOR REINSERTING THE RESISTOR IN SERIES WITH THE ARMATURE OF THE MOTOR, AND MEANS FOR CONNECTING SAID FIRST AND SECOND BATTERIES IN SERIES AND SIMULTANEOUSLY PLACING EACH UNI-DIRECTIONAL CONDUCTOR IN PARALLEL WITH THE OTHER BATTERY WHILE KEEPING IT IN SERIES WITH THE BATTERY OF ITS FIRST CONNECTION WHEREBY CURRENT WILL CONTINUE TO FLOW UNINTERRUPTED IN SERIES TO PROVIDE A THIRD SPEED, MEANS FOR SHORT CIRCUITING THE RESISTOR TO OBTAIN A FOURTH SPEED, MEANS FOR REINSERTING THE RESISTOR IN SERIES WITH THE ARMATURE OF THE MOTOR, FOR SHORT CIRCUITING ONE FIELD WINDING WHILE MAINTAINING THE OTHER FIELD WINDING IN SERIES WITH THE MOTOR ARMATURE, AND FOR CONNECTING THE ONE FIELD WINDING IN PARALLEL WITH THE OTHER FIELD WINDING TO OBTAIN A FIFTH SPEED, AND MEANS FOR SHORT CIRCUITING THE RESISTOR TO OBTAIN A SIXTH SPEED.
Claim 2
Independent Claim
280 words
A SYSTEM FOR CONTROLLING THE SPEED OF A BATTERY OPERATED ELECTRIC TRACTION MOTOR OF AN INDUSTRIAL TRUCK HAVING AN ARMATURE AND TWO FIELD WINDINGS COMPRISING, FIRST AND SECOND BATTERIES, TWO UNI-DIRECTIONAL CONDUCTORS, A RESISTOR, MEANS FOR CONNECTING THE TWO BATTERIES IN PARALLEL WITH EACH OTHER, WITH ONE BATTERY BEING CONNECTED IN PARALLEL THROUGH ONE UNI-DIRECTIONAL CONDUCTOR IN SERIES THEREWITH IN A POSITION OF OPPOSITE POLARITY FROM THAT OF THE OTHER BATTERY AND THE OTHER BATTERY CONNECTED IN PARALLEL THROUGH THE OTHER UNI-DIRECTIONAL CONDUCTOR IN SERIES THEREWITH IN A POSITION OF OPPOSITE POLARITY FROM THAT OF THE ONE BATTERY, FOR CONNECTING THE TWO FIELD WINDINGS IN SERIES, AND FOR CONNECTING THE PARALLEL CONNECTED BATTERIES, THE SERIES CONNECTED FIELD WINDINGS AND THE RESISTOR IN SERIES WITH THE ARMATURE OF THE MOTOR TO OBTAIN A FIRST SPEED, MEANS FOR SHORT CIRCUITING THE RESISTOR TO OBTAIN A SECOND SPEED, MEANS FOR REINSERTING THE RESISTOR IN SERIES WITH THE ARMATURE OF THE MOTOR, AND MEANS FOR CONNECTING SAID FIRST AND SECOND BATTERIES IN SERIES AND SIMULTANEOUSLY PLACING EACH UNI-DIRECTIONAL CONDUCTOR IN PARALLEL WITH THE OTHER BATTERY WHILE KEEPING IT IN SERIES WITH THE BATTERY OF ITS FIRST CONNECTION WHEREBY CURRENT WILL CONTINUE TO FLOW UNINTERRUPTED IN SERIES TO PROVIDE A THIRD SPEED, MEANS FOR SHORT CIRCUITING THE RESISTOR TO OBTAIN A FOURTH SPEED, MEANS FOR REINSERTING THE RESISTOR IN SERIES WITH THE ARMATURE OF THE MOTOR, FOR SHORT CIRCUITING ONE FIELD WINDING WHILE MAINTAINING THE OTHER FIELD WINDING IN SERIES WITH THE MOTOR ARMATURE, AND FOR CONNECTING THE ONE FIELD WINDING IN PARALLEL WITH THE OTHER FIELD WINDING TO OBTAIN A FIFTH SPEED, AND MEANS FOR SHORT CIRCUITING THE RESISTOR TO OBTAIN A SIXTH SPEED.
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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |