US3374309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex way station selector
Assignee: Western Union Telegraph Co
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Filing: 1964-03-30
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Granted: 1968-03-19
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Elich John
- 👤 Vincent C Kempf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:09
CPC Classifications
H; H04; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/403
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
IN A TELEGRAPH SYSTEM, IN COMBINATION: (A) A CENTRAL STATION; (B) A PLURALITY OF WAY STATIONS; (C) A LINE CIRCUIT ARRANGED FOR DUPLEX OPERATION INTERCONNECTING THE CENTRAL STATION AND THE WAY STATIONS; (D) A MESSAGE RECORDER AT EACH WAY STATION; (E) A RECORDER CONTROL MEANS AT SAID RECORDER FOR BLINDING AND UNBLINDING SAID RECORDER TO MESSAGE AND CONTROL SIGNALS; (F) A RECEIVING DISTRIBUTOR CONNECTED TO SAID LINE CIRCUIT FOR RECEIVING SIGNALS FROM THE CENTRAL STATION; (G) READING MEANS CONNECTED TO SAID RECEIVING DISTRIBUTOR FOR READING A SEQUENCE OF WAY STATION SELECTION CHARACTERS SENT FROM THE CENTRAL STATION; (H) A RECEIVING COUNTER CAPABLE OF ASSUMING A PREDETERMINED NUMBER OF COUNTING STATES; (I) SIGNAL TRANSMISSION MEANS AT EACH WAY STATION CONNECTED TO SAID LINE CIRCUIT FOR TRANSMITTING ANSWERBACK SIGNALS TO THE CENTRAL STATION; AND (J) CIRCUIT MEANS INTERCONNECTING SAID RECEIVING COUNTER WITH SAID RECEIVING DISTRIBUTOR, WITH SAID READING MEANS, AND WITH SAID SIGNAL TRANSMISSION MEANS, WHEREBY CONTROL SIGNALS ARE RECEIVED BY SAID RECEIVING DISTRIBUTOR, MESSAGES ARE RECORDED BY SAID RECORDER AND ANSWER-BACK SIGNALS ARE SENT BY SAID SIGNAL TRANSMISSION MEANS, ONLY DURING COUNTING STATES OF SAID RECEIVING COUNTER IN A RECEIVING PROGRAM DETERMINED AND CONTROLLED BY SAID COUNTER.
Claim 2
Dependent Claim
196 words
IN A TELEGRAPH SYSTEM, IN COMBINATION: (A) A CENTRAL STATION; (B) A PLURALITY OF WAY STATIONS; (C) A LINE CIRCUIT ARRANGED FOR DUPLEX OPERATION INTERCONNECTING THE CENTRAL STATION AND THE WAY STATIONS; (D) A MESSAGE RECORDER AT EACH WAY STATION; (E) A RECORDER CONTROL MEANS AT SAID RECORDER FOR BLINDING AND UNBLINDING SAID RECORDER TO MESSAGE AND CONTROL SIGNALS; (F) A RECEIVING DISTRIBUTOR CONNECTED TO SAID LINE CIRCUIT FOR RECEIVING SIGNALS FROM THE CENTRAL STATION; (G) READING MEANS CONNECTED TO SAID RECEIVING DISTRIBUTOR FOR READING A SEQUENCE OF WAY STATION SELECTION CHARACTERS SENT FROM THE CENTRAL STATION; (H) A RECEIVING COUNTER CAPABLE OF ASSUMING A PREDETERMINED NUMBER OF COUNTING STATES; (I) SIGNAL TRANSMISSION MEANS AT EACH WAY STATION CONNECTED TO SAID LINE CIRCUIT FOR TRANSMITTING ANSWERBACK SIGNALS TO THE CENTRAL STATION; AND (J) CIRCUIT MEANS INTERCONNECTING SAID RECEIVING COUNTER WITH SAID RECEIVING DISTRIBUTOR, WITH SAID READING MEANS, AND WITH SAID SIGNAL TRANSMISSION MEANS, WHEREBY CONTROL SIGNALS ARE RECEIVED BY SAID RECEIVING DISTRIBUTOR, MESSAGES ARE RECORDED BY SAID RECORDER AND ANSWER-BACK SIGNALS ARE SENT BY SAID SIGNAL TRANSMISSION MEANS, ONLY DURING COUNTING STATES OF SAID RECEIVING COUNTER IN A RECEIVING PROGRAM DETERMINED AND CONTROLLED BY SAID COUNTER.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |