Patent US1883240A successfully refreshed from Google Patents.
Patent US3267281A successfully refreshed from Google Patents.
US3267281A
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Highway crossing system
Assignee: SPX Technologies Inc
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Filing: 1962-09-10
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Granted: 1966-08-16
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Roger C Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:58
CPC Classifications
B; B61; B61L; B61L29/00; B61L29/24; B61L29/28; B61L29/288
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A HIGHWAY CROSSING PROTECTION SYSTEM COMPRISING MEANS FOR GENERATING A PLURALITY OF SIGNALS INDICATIVE OF THE PRESENCE OF A TRAIN ON EITHER SIDE OF A HIGHWAY CROSSING, A NETWORK OF FERRITE CORES, MEANS UTILIZING THE SIGNALS AS PRIMING CURRENTS FOR THE NETWORK, MEANS COUPLING A PAIR OF CLOCK GENERATORS TO SAID NETWORK TO PROVIDE SIGNALS FOR READING OUT PULSES FROM THE NETWORK, AND RELAY MEANS COUPLED TO THE OUTPUT OF THE NETWORK FOR ACTUATING WARNING MEANS AT THE HIGHWAY CROSSING UPON DEGENERIZATION, SAID RELAY MEANS DEGENERIZATION UPON THE APPROACH OF A TRAIN AT THE HIGHWAY CROSSING.
Claim 2
Dependent Claim
96 words
A HIGHWAY CROSSING PROTECTION SYSTEM COMPRISING MEANS FOR GENERATING A PLURALITY OF SIGNALS INDICATIVE OF THE PRESENCE OF A TRAIN ON EITHER SIDE OF A HIGHWAY CROSSING, A NETWORK OF FERRITE CORES, MEANS UTILIZING THE SIGNALS AS PRIMING CURRENTS FOR THE NETWORK, MEANS COUPLING A PAIR OF CLOCK GENERATORS TO SAID NETWORK TO PROVIDE SIGNALS FOR READING OUT PULSES FROM THE NETWORK, AND RELAY MEANS COUPLED TO THE OUTPUT OF THE NETWORK FOR ACTUATING WARNING MEANS AT THE HIGHWAY CROSSING UPON DEGENERIZATION, SAID RELAY MEANS DEGENERIZATION UPON THE APPROACH OF A TRAIN AT THE HIGHWAY CROSSING.
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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) | 1969-08-15 | 1970-02-14 | 1970-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-15 | 1974-02-14 | 1974-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-15 | 1978-02-14 | 1978-08-16 | $7700.00 | Window Closed / Lapsed |