Patent US3299834A successfully refreshed from Google Patents.
US3299834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for railway trains
Assignee: SPX Technologies Inc
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Filing: 1966-01-13
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Granted: 1967-01-24
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Expires: 1986-01-13
Abstract
No abstract record available.
Inventors
- 👤 Hughson J Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:06
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/22; B61L3/24; B61L3/246; B60; B60L; B60L15/00; B60L15/40; B61L3/221; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A SYSTEM FOR CONTROLLING THE DRIVING UNIT ON A VEHICLE DESIRED TO TRAVEL AT A PREDETERMINED DESIRED SPEED, THE COMBINATION OF, (A) FIRST MEANS FOR MEASURING THE RESULTANT OF FORCES TENDING TO ACCELERATE SAID VEHICLE ABOVE SAID DESIRED SPEED, (B) SECOND MEANS MEASURING THE RESULTANT OF FORCES TENDING TO DECELERATE SAID VEHICLE BELOW SAID DESIRED SPEED, (C) COMPUTING MEANS RESPONSIVE TO SAID FIRST AND SECOND MEASURING MEANS FOR COMPUTING A SIGNAL CHARACTERISTIC OF THE HORSEPOWER REQUIRED OF SAID DRIVING UNIT TO MAKE THE RESULTANT OF SAID ACCELERATING FORCES SUBSTANTIALLY EQUAL TO THE RESULTANT OF SAID DECELERATING FORCES IN ORDER TO MAINTAIN THE DESIRED SPEED, AND (D) MEANS GOVERNED BY THE HORSEPOWER SIGNAL COMPUTED BY THE COMPUTING MEANS FOR REGULATING THE DRIVING UNIT ACCORDINGLY.
Claim 2
Dependent Claim
124 words
IN A SYSTEM FOR CONTROLLING THE DRIVING UNIT ON A VEHICLE DESIRED TO TRAVEL AT A PREDETERMINED DESIRED SPEED, THE COMBINATION OF, (A) FIRST MEANS FOR MEASURING THE RESULTANT OF FORCES TENDING TO ACCELERATE SAID VEHICLE ABOVE SAID DESIRED SPEED, (B) SECOND MEANS MEASURING THE RESULTANT OF FORCES TENDING TO DECELERATE SAID VEHICLE BELOW SAID DESIRED SPEED, (C) COMPUTING MEANS RESPONSIVE TO SAID FIRST AND SECOND MEASURING MEANS FOR COMPUTING A SIGNAL CHARACTERISTIC OF THE HORSEPOWER REQUIRED OF SAID DRIVING UNIT TO MAKE THE RESULTANT OF SAID ACCELERATING FORCES SUBSTANTIALLY EQUAL TO THE RESULTANT OF SAID DECELERATING FORCES IN ORDER TO MAINTAIN THE DESIRED SPEED, AND (D) MEANS GOVERNED BY THE HORSEPOWER SIGNAL COMPUTED BY THE COMPUTING MEANS FOR REGULATING THE DRIVING UNIT ACCORDINGLY.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |