US3117303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random access switching system
Assignee: Westinghouse Air Brake Co
•
Filing: 1959-03-13
•
Granted: 1964-01-07
•
Expires: 1979-03-13
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Byrne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:54
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A CHAIN SEQUENCING CIRCUIT FOR CONNECTING ONE AT A TIME A PLURALITY OF INPUT CIRCUITS TO A COMMON CIRCUIT IN RESPONSE TO RANDOMLY OCCURRING DEMAND SIGNALS EACH ASSOCIATED WITH AN INPUT CIRCUIT, COMPRISING, IN COMBINATION, A PLURALITY OF INPUT CIRCUIT TERMINALS, A SOURCE OF DEMAND SIGNALS, ONE FOR EACH INPUT CIRCUIT TERMINAL, A FIRST PLURALITY OF RELAYS, MEANS FOR ENERGIZING EACH OF SAID RELAYS BY ONE OF SAID DEMAND SIGNALS, AN ORDERED PLURALITY OF SEQUENCE RELAYS, MEANS CONTROLLED BY EACH OF SAID FIRST RELAYS WHEN ENERGIZED AND ANY HIGHER ORDERED SEQUENCE RELAYS WHEN DEENERGIZED FOR ENERGIZING ONE OF SAID SEQUENCE RELAYS, A PLURALITY OF CONNECTOR RELAYS, MEANS CONTROLLED BY EACH SEQUENCE RELAY WHEN ENERGIZED AND ANY LOWER ORDERED SEQUENCE RELAYS WHEN DEENERGIZED FOR ENERGIZING ONE OF SAID CONNECTOR RELAYS, A COMMON CIRCUIT TERMINAL, AND MEANS CONTROLLED BY EACH CONNECTOR RELAY FOR CONNECTING ONE OF SAID INPUT CIRCUITS TO SAID COMMON CIRCUIT TERMINAL.
Claim 2
Dependent Claim
152 words
A CHAIN SEQUENCING CIRCUIT FOR CONNECTING ONE AT A TIME A PLURALITY OF INPUT CIRCUITS TO A COMMON CIRCUIT IN RESPONSE TO RANDOMLY OCCURRING DEMAND SIGNALS EACH ASSOCIATED WITH AN INPUT CIRCUIT, COMPRISING, IN COMBINATION, A PLURALITY OF INPUT CIRCUIT TERMINALS, A SOURCE OF DEMAND SIGNALS, ONE FOR EACH INPUT CIRCUIT TERMINAL, A FIRST PLURALITY OF RELAYS, MEANS FOR ENERGIZING EACH OF SAID RELAYS BY ONE OF SAID DEMAND SIGNALS, AN ORDERED PLURALITY OF SEQUENCE RELAYS, MEANS CONTROLLED BY EACH OF SAID FIRST RELAYS WHEN ENERGIZED AND ANY HIGHER ORDERED SEQUENCE RELAYS WHEN DEENERGIZED FOR ENERGIZING ONE OF SAID SEQUENCE RELAYS, A PLURALITY OF CONNECTOR RELAYS, MEANS CONTROLLED BY EACH SEQUENCE RELAY WHEN ENERGIZED AND ANY LOWER ORDERED SEQUENCE RELAYS WHEN DEENERGIZED FOR ENERGIZING ONE OF SAID CONNECTOR RELAYS, A COMMON CIRCUIT TERMINAL, AND MEANS CONTROLLED BY EACH CONNECTOR RELAY FOR CONNECTING ONE OF SAID INPUT CIRCUITS TO SAID COMMON CIRCUIT TERMINAL.
References Cited (Backward Citations)
US1772167A
Cited
US1982290A
Cited
US2485343A
Cited
US2719284A
Cited
US2597075A
Cited
US2644931A
Cited
US2840705A
Cited
US2836734A
Cited
US3020524A
Cited
US2958857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |