US3307031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic switching system
Assignee: SPX Technologies Inc
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Filing: 1963-06-12
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Granted: 1967-02-28
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Expires: 1983-06-12
Abstract
No abstract record available.
Inventors
- 👤 Klaus H Frielinghaus
- 👤 John L Langdon
- 👤 Arthur W Wetmore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:53
CPC Classifications
B; B61; B61L; B61L17/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN CONTROL MEANS FOR A RAILWAY CAR CLASSIFICATION YARD INCLUDING A PLURALITY OF TRACK SWITCHES, THE COMBINATION COMPRISING A PLURALITY OF STORAGE MEANS, EACH SAID STORAGE MEANS INCLUDING APERTURED MAGNETIC CORES, MEANS COUPLING A CODED SIGNAL INTO A FIRST OF SAID STORAGE MEANS, MEANS COUPLING THE SIGNAL SEQUENTIALLY THROUGH EACH OF SAID STORAGE MEANS, AND MEANS RESPONSIVE TO THE REMANENT MAGNETIC STATE OF ONE CORE IN AT LEAST ONE OF SAID STORAGE MEANS FOR POSITIONING A TRACK SWITCH ASSOCIATED WITH SAID STORAGE MEANS.
Claim 2
Dependent Claim
83 words
IN CONTROL MEANS FOR A RAILWAY CAR CLASSIFICATION YARD INCLUDING A PLURALITY OF TRACK SWITCHES, THE COMBINATION COMPRISING A PLURALITY OF STORAGE MEANS, EACH SAID STORAGE MEANS INCLUDING APERTURED MAGNETIC CORES, MEANS COUPLING A CODED SIGNAL INTO A FIRST OF SAID STORAGE MEANS, MEANS COUPLING THE SIGNAL SEQUENTIALLY THROUGH EACH OF SAID STORAGE MEANS, AND MEANS RESPONSIVE TO THE REMANENT MAGNETIC STATE OF ONE CORE IN AT LEAST ONE OF SAID STORAGE MEANS FOR POSITIONING A TRACK SWITCH ASSOCIATED WITH SAID STORAGE MEANS.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |