US3384032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-automatic locomotive control system
Assignee: Individual
•
Filing: 1964-08-31
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Granted: 1968-05-21
•
Expires: 1984-08-31
Abstract
No abstract record available.
Inventors
- 👤 Ruff Douglass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:58
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/32; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF IMPROVEMENT IN BRAKING CONTROLS FOR A TRAIN COMPRISING, PROVIDING A LEAD LOCOMOTIVE, PLACING A SINGLE HELPER LOCOMOTIVE AMID-TRAIN IN A POSITION SUBSTANTIALLY TWO-THIRDS OF THE WAY BACK FROM THE LEAD LOCOMOTIVE, COUPLING A SINGLE AIRLINE THROUGHOUT THE TRAIN, PUMPING UP THE SINGLE AIRLINE FROM EACH LOCOMOTIVE TO A PREDETERMINED PRESSURE AND JOINTLY CONTROLLING THE BRAKES THROUGH SAID AIRLINE BY COMBINED BRAKING ACTION AT THE TWO LOCOMOTIVES.
Claim 2
Independent Claim
69 words
THE METHOD OF IMPROVEMENT IN BRAKING CONTROLS FOR A TRAIN COMPRISING, PROVIDING A LEAD LOCOMOTIVE, PLACING A SINGLE HELPER LOCOMOTIVE AMID-TRAIN IN A POSITION SUBSTANTIALLY TWO-THIRDS OF THE WAY BACK FROM THE LEAD LOCOMOTIVE, COUPLING A SINGLE AIRLINE THROUGHOUT THE TRAIN, PUMPING UP THE SINGLE AIRLINE FROM EACH LOCOMOTIVE TO A PREDETERMINED PRESSURE AND JOINTLY CONTROLLING THE BRAKES THROUGH SAID AIRLINE BY COMBINED BRAKING ACTION AT THE TWO LOCOMOTIVES.
References Cited (Backward Citations)
US1786815A
Cited
US1900408A
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US2977896A
Cited
US2937907A
Cited
FR1277755A
Cited
US3217662A
Cited
US3217663A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |