US3084222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiplex transmission systems
Assignee: ASS ELECT IND WOOLWICH Ltd
•
Filing: 1959-08-11
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Granted: 1963-04-02
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Expires: 1979-08-11
Abstract
No abstract record available.
Inventors
- 👤 Foot George Helier
- 👤 Flood John Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:29
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66; H04B1/662; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/045; H04N; H04N11/00; H04N11/02; H04N7/00; H04N7/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN A MULTIPLEX TRANSMISSION SYSTEM HAVING A TRANSMITTER AND A RECEIVER, A CATHODE RAY STORAGE DEVICE HAVING A STORAGE SURFACE AT THE TRANSMITTER, LINE SCANNING MEANS AND FRAME SCANNING MEANS FOR WRITING SAMPLE SIGNALS OF A NUMBER OF CHANNELS ON TO THE STORAGE SURFACE IN RECURRENT PARALLEL SWEEPS TO FORM A RECTANGULAR MATRIX IN WHICH SAMPLE SIGNALS OF THE RESPECTIVE CHANNEL ARE ALIGNED LATERALLY, READING LINE SCANNING MEANS AND READING FRAME SCANNING MEANS FOR SCANNING SAID STORAGE SURFACE WITH RECURRENT LATERAL SWEEPS AT A SPEED WHICH IS HIGH RELATIVE TO THAT OF THE ORIGINAL SIGNALS, SWITCHING MEANS FOR ALTERNATELY CONNECTING THE WRITING SCANNING MEANS AND READING SCANNING MEANS TO THE DEFLECTION CONTROL OF THE CATHODE RAY TUBE, MEANS WHEREBY THE READING LINE SCANNING MEANS IS ONLY TRIGGERED IF DURING WRITING SIGNALS CORRESPONDING TO THAT CHANNEL HAVE BEEN RECEIVED AND MEANS FOR TRANSMITTING THE TRAINS OF SIGNALS THEREBY OBTAINED SEQUENTIALLY TO THE RECEIVER AND MEANS AT THE RECEIVER FOR SEPARATING THE SIGNALS INTO APPROPRIATE CHANNELS.
Claim 2
Dependent Claim
164 words
IN A MULTIPLEX TRANSMISSION SYSTEM HAVING A TRANSMITTER AND A RECEIVER, A CATHODE RAY STORAGE DEVICE HAVING A STORAGE SURFACE AT THE TRANSMITTER, LINE SCANNING MEANS AND FRAME SCANNING MEANS FOR WRITING SAMPLE SIGNALS OF A NUMBER OF CHANNELS ON TO THE STORAGE SURFACE IN RECURRENT PARALLEL SWEEPS TO FORM A RECTANGULAR MATRIX IN WHICH SAMPLE SIGNALS OF THE RESPECTIVE CHANNEL ARE ALIGNED LATERALLY, READING LINE SCANNING MEANS AND READING FRAME SCANNING MEANS FOR SCANNING SAID STORAGE SURFACE WITH RECURRENT LATERAL SWEEPS AT A SPEED WHICH IS HIGH RELATIVE TO THAT OF THE ORIGINAL SIGNALS, SWITCHING MEANS FOR ALTERNATELY CONNECTING THE WRITING SCANNING MEANS AND READING SCANNING MEANS TO THE DEFLECTION CONTROL OF THE CATHODE RAY TUBE, MEANS WHEREBY THE READING LINE SCANNING MEANS IS ONLY TRIGGERED IF DURING WRITING SIGNALS CORRESPONDING TO THAT CHANNEL HAVE BEEN RECEIVED AND MEANS FOR TRANSMITTING THE TRAINS OF SIGNALS THEREBY OBTAINED SEQUENTIALLY TO THE RECEIVER AND MEANS AT THE RECEIVER FOR SEPARATING THE SIGNALS INTO APPROPRIATE CHANNELS.
References Cited (Backward Citations)
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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) | 1966-04-01 | 1966-10-01 | 1967-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-01 | 1970-10-01 | 1971-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-01 | 1974-10-01 | 1975-04-02 | $7700.00 | Window Closed / Lapsed |