US3272981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermittent inductive transmission system
Assignee: SPX Technologies Inc
•
Filing: 1963-04-04
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Granted: 1966-09-13
•
Expires: 1983-04-04
Abstract
No abstract record available.
Inventors
- 👤 William J Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:52
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/02; B61L3/08; B61L3/12; B61L3/121
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
AN INTERMITTENT INDUCTIVE SYSTEM FOR COMMUNICATING INFORMATION FROM THE WAYSIDE TO A MOVING VEHICLE COMPRISING, A PAIR OF TRANSMITTING COILS DISPOSED ALONG THE WAYSIDE, ONE OF THE COILS BEING DISPOSED AHEAD OF THE OTHER IN THE DIRECTION OF TRAVEL OF THE VEHICLE, EACH OF THE COILS BEING TUNED TO A SELECTED DISTINCTIVE FREQUENCY, RECEIVING MEANS ON THE VEHICLE HAVING A SWEEP FREQUENCY OSCILLATOR CONNECTED TO A RECEIVING COIL POSITIONED TO BE INFLUENCED BY THE DISTINCTIVE FREQUENCY TO WHICH EACH OF THE TRANSMITTING COILS IS TUNED WHEN THE RECEIVING COILS PASSES IN CLOSE PROXIMITY WITH THE TRANSMITTING COILS RESPECTIVELY, ACKNOWLEDGING MEANS ON THE VEHICLE ACTIVATED FOR A PREDETERMINED TIME INTERVAL IN RESPONSE TO MANUAL OPERATION THEREOF, FIRST AND SECOND MEANS ON THE VEHICLE FOR REGISTERING THE RECEPTION OF DISTINCTIVE FREQUENCIES OF THE RESPECTIVE TRANSMITTING COILS AS THEY ARE RECEIVED BY SAID RECEIVING MEANS, INFORMATION OUTPUT MEANS ON THE VEHICLE OPERATIVE WHEN ACTIVATED TO PROVIDE A SINGLE INFORMATION CODE IN RESPONSE TO THE
Claim 2
Dependent Claim
161 words
AN INTERMITTENT INDUCTIVE SYSTEM FOR COMMUNICATING INFORMATION FROM THE WAYSIDE TO A MOVING VEHICLE COMPRISING, A PAIR OF TRANSMITTING COILS DISPOSED ALONG THE WAYSIDE, ONE OF THE COILS BEING DISPOSED AHEAD OF THE OTHER IN THE DIRECTION OF TRAVEL OF THE VEHICLE, EACH OF THE COILS BEING TUNED TO A SELECTED DISTINCTIVE FREQUENCY, RECEIVING MEANS ON THE VEHICLE HAVING A SWEEP FREQUENCY OSCILLATOR CONNECTED TO A RECEIVING COIL POSITIONED TO BE INFLUENCED BY THE DISTINCTIVE FREQUENCY TO WHICH EACH OF THE TRANSMITTING COILS IS TUNED WHEN THE RECEIVING COILS PASSES IN CLOSE PROXIMITY WITH THE TRANSMITTING COILS RESPECTIVELY, ACKNOWLEDGING MEANS ON THE VEHICLE ACTIVATED FOR A PREDETERMINED TIME INTERVAL IN RESPONSE TO MANUAL OPERATION THEREOF, FIRST AND SECOND MEANS ON THE VEHICLE FOR REGISTERING THE RECEPTION OF DISTINCTIVE FREQUENCIES OF THE RESPECTIVE TRANSMITTING COILS AS THEY ARE RECEIVED BY SAID RECEIVING MEANS, INFORMATION OUTPUT MEANS ON THE VEHICLE OPERATIVE WHEN ACTIVATED TO PROVIDE A SINGLE INFORMATION CODE IN RESPONSE TO THE
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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) | 1969-09-12 | 1970-03-14 | 1970-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-12 | 1974-03-14 | 1974-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-12 | 1978-03-14 | 1978-09-13 | $7700.00 | Window Closed / Lapsed |