Patent US3140068A successfully refreshed from Google Patents.
US3140068A
Expired / Lapsed
US
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Remote controlled locomotive control system
Assignee: SPX Technologies Inc
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Filing: 1957-12-11
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Granted: 1964-07-07
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Expires: 1977-12-11
Abstract
No abstract record available.
Inventors
- 👤 William J Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/121; B61L17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A SYSTEM FOR CONTROLLING A MULTIPLE SPEED LOCOMOTIVE, A PRIME MOVER ACTIVATING MEANS FOR SELECTIVELY DRIVING THE LOCOMOTIVE IN A FORWARD AND REVERSE DIRECTION IN RESPONSE TO THE RECEPTION OF A CARRIER WAVE SELECTIVELY MODULATED BY A RESPECTIVE CODE COMBINATION OF A PLURALITY OF DISTINCT FREQUENCIES, A TRANSMITTING MEANS OPERABLE TO TRANSMIT A CARRIER WAVE, A MANUAL LEVER MEANS OPERABLE TO BE POSITIONED TO A FORWARD AND REVERSE DESIGNATION, A CODE SELECTION MEANS FOR CAUSING THE TRANSMITTED CARRIER WAVE TO BE SELECTIVELY MODULATED BY A DISTINCT CODE COMBINATION OF A PLURALITY OF FREQUENCIES IN ACCORDANCE WITH THE POSITION OF SAID MANUALLY
Claim 2
Dependent Claim
102 words
IN A SYSTEM FOR CONTROLLING A MULTIPLE SPEED LOCOMOTIVE, A PRIME MOVER ACTIVATING MEANS FOR SELECTIVELY DRIVING THE LOCOMOTIVE IN A FORWARD AND REVERSE DIRECTION IN RESPONSE TO THE RECEPTION OF A CARRIER WAVE SELECTIVELY MODULATED BY A RESPECTIVE CODE COMBINATION OF A PLURALITY OF DISTINCT FREQUENCIES, A TRANSMITTING MEANS OPERABLE TO TRANSMIT A CARRIER WAVE, A MANUAL LEVER MEANS OPERABLE TO BE POSITIONED TO A FORWARD AND REVERSE DESIGNATION, A CODE SELECTION MEANS FOR CAUSING THE TRANSMITTED CARRIER WAVE TO BE SELECTIVELY MODULATED BY A DISTINCT CODE COMBINATION OF A PLURALITY OF FREQUENCIES IN ACCORDANCE WITH THE POSITION OF SAID MANUALLY
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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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |