US3218456A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for trains
Assignee: SPX Technologies Inc
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Filing: 1965-06-18
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Granted: 1965-11-16
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Expires: 1985-06-18
Abstract
No abstract record available.
Inventors
- 👤 William J Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:22
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A REMOTE CONTROL SYSTEM FOR A VARIABLE SPEED POWER UNIT OF A LOCOMOTIVE COMPRISING, CODE TRANSMITTING MEANS AT A CONTROL POINT FOR TRANSMITTING RADIATED ENERGY SELECTIVELY MODULATED BY A PLURALITY OF DIFFERENT TONES, TONE SELECTING MEANS AT THE CONTROL POINT FOR SELECTING DIFFERENT COMBINATIONS OF TONES FOR TRANSMISSION IN RESPONSE TO THE DESIGNATION OF RESPECTIVE CONTROLS FOR THE LOCOMOTIVE, CODE RECEIVING MEANS ON THE LOCOMOTIVE FOR RECEIVING THE TONES COMMUNICATED FROM THE CONTROL POINT, SAID CODE RECEIVING MEANS BEING DISTINCTIVELY CONDITIONED IN RESPONSE TO THE RESPECTIVE TONES RECEIVED, STEPPING MEANS ON THE LOCOMOTIVE INITIATED UPON RECEPTION OF A PARTICULAR COMBINATION OF TONES FOR PROGRESSIVELY CAUS-
Claim 2
Dependent Claim
105 words
A REMOTE CONTROL SYSTEM FOR A VARIABLE SPEED POWER UNIT OF A LOCOMOTIVE COMPRISING, CODE TRANSMITTING MEANS AT A CONTROL POINT FOR TRANSMITTING RADIATED ENERGY SELECTIVELY MODULATED BY A PLURALITY OF DIFFERENT TONES, TONE SELECTING MEANS AT THE CONTROL POINT FOR SELECTING DIFFERENT COMBINATIONS OF TONES FOR TRANSMISSION IN RESPONSE TO THE DESIGNATION OF RESPECTIVE CONTROLS FOR THE LOCOMOTIVE, CODE RECEIVING MEANS ON THE LOCOMOTIVE FOR RECEIVING THE TONES COMMUNICATED FROM THE CONTROL POINT, SAID CODE RECEIVING MEANS BEING DISTINCTIVELY CONDITIONED IN RESPONSE TO THE RESPECTIVE TONES RECEIVED, STEPPING MEANS ON THE LOCOMOTIVE INITIATED UPON RECEPTION OF A PARTICULAR COMBINATION OF TONES FOR PROGRESSIVELY CAUS-
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |