US3247371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway signalling system for the automatic control op trains
Assignee: —
•
Filing: —
•
Granted: 1966-04-19
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Expires: 1983-04-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/22; B61L3/221; B61L3/02; B61L3/08; B61L3/12; B61L3/125; B60; B60L; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A RAILWAY SIGNALLING SYSTEM FOR CONTROLLING THE SPEED OF A TRAIN AT A GIVEN POINT COMPRISING A TRACK CIRCUIT HAVING A PLURALITY OF SECTIONS INSULATED FROM ONE ANOTHER, A MAIN STATION, A PLURALITY OF SECONDARY STATIONS ARRANGED ALONG THE TRACK CIRCUIT WITHIN A GIVEN SECTION THEREOF WHICH IS INSULATED FROM THE ADJACENT SECTIONS, MEANS AT SAID MAIN STATION FOR TRANSMITTING TO SAID GIVEN SECTION OF TRACK CIRCUIT IDENTIFICATION SIGNALS INDIVIDUAL TO THE VARIOUS SECONDARY STATIONS THEREBY TO SELECTIVELY ACTUATE A GIVEN ONE OF SAID SECONDARY STATIONS IN ACCORDANCE WITH A DESIRED TRAIN SPEED AT SAID GIVEN POINT, EACH OF SAID SECONDARY STATIONS COMPRISING CONTROL MEANS RESPONSIVE TO ITS INDIVIDUAL IDENTIFICATION SIGNAL AND MEANS RESPONSIVE TO SAID CONTROL MEANS FOR TRANSMITTING A CHARACTERISTIC COMMAND SPEED SIGNAL TO SAID GIVEN SECTION OF THE TRACK CIRCUIT, AND MEANS IN SAID TRAIN RESPONSIVE TO SAID COMMAND SPEED SIGNAL RECEIVED FROM THE TRACK CIRCUIT FOR AUTOMATICALLY ADJUSTING THE TRAIN SPEED.
Claim 2
Dependent Claim
155 words
A RAILWAY SIGNALLING SYSTEM FOR CONTROLLING THE SPEED OF A TRAIN AT A GIVEN POINT COMPRISING A TRACK CIRCUIT HAVING A PLURALITY OF SECTIONS INSULATED FROM ONE ANOTHER, A MAIN STATION, A PLURALITY OF SECONDARY STATIONS ARRANGED ALONG THE TRACK CIRCUIT WITHIN A GIVEN SECTION THEREOF WHICH IS INSULATED FROM THE ADJACENT SECTIONS, MEANS AT SAID MAIN STATION FOR TRANSMITTING TO SAID GIVEN SECTION OF TRACK CIRCUIT IDENTIFICATION SIGNALS INDIVIDUAL TO THE VARIOUS SECONDARY STATIONS THEREBY TO SELECTIVELY ACTUATE A GIVEN ONE OF SAID SECONDARY STATIONS IN ACCORDANCE WITH A DESIRED TRAIN SPEED AT SAID GIVEN POINT, EACH OF SAID SECONDARY STATIONS COMPRISING CONTROL MEANS RESPONSIVE TO ITS INDIVIDUAL IDENTIFICATION SIGNAL AND MEANS RESPONSIVE TO SAID CONTROL MEANS FOR TRANSMITTING A CHARACTERISTIC COMMAND SPEED SIGNAL TO SAID GIVEN SECTION OF THE TRACK CIRCUIT, AND MEANS IN SAID TRAIN RESPONSIVE TO SAID COMMAND SPEED SIGNAL RECEIVED FROM THE TRACK CIRCUIT FOR AUTOMATICALLY ADJUSTING THE TRAIN 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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |