US3141929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data transmission signal gating apparatus
Assignee: International Business Machines Corp
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Filing: 1962-01-02
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Granted: 1964-07-21
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Expires: 1982-01-02
Abstract
No abstract record available.
Inventors
- 👤 Margaret A George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:31
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/02; H04L27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
IN A DATA TRANSMISSION APPARATUS, IN COMBINATION, A SOURCE OF PERIODIC WAVES, DATA RESPONSIVE MEANS OPERATIVE TO PRODUCE AT RESPECTIVE TERMINALS COMPLEMENTARY LEVEL SIGNALS THE BINARY STATUS OF WHICH IS DATA-SIGNIFICANT, AND BALANCED DOUBLE GATE MEANS COMPRISING A PAIR OF TRANSISTORS OF THE SAME CONDUCTIVITY TYPE, EACH SAID TRANSISTOR HAVING AN EMITTER, A BASE AND A COLLECTOR, SAID COLLECTORS BEING CONNECTED TO LOAD IMPEDANCE MEANS PRESENTING THE SAME RESISTANCE TO CURRENT FROM EACH OF SAID COLLECTORS, MEANS CONNECTING SAID SOURCE OF PERIODIC WAVES TO ONE OF SAID BASES, MATCHED CLASS A BIAS SUPPLIES CONNECTED TO SAID BASES, AND SELECTIVE CUT-OFF MEANS COMPRISING A CIRCUIT CONNECTION BETWEEN EACH OF SAID EMITTERS AND A RESPECTIVE ONE OF SAID TERMINALS OF SAID DATA RESPONSIVE MEANS ADAPTED TO CUT ONE OF SAID TRANSISTORS OFF AND RENDER THE OTHER CONDUCTIVE IN ITS ACTIVE REGION IN ACCORDANCE WITH THE STATUS OF SAID DATA RESPONSIVE MEANS, SAID GATE MEANS BEING SYMMETRICAL AND OPERATIVE IN RESPONSE TO SAID BIAS SUPPLIES TO YIELD THE SAME D.C. OUTPUT COMPONENT TO SAID LOAD IMPEDANCE IRRESPECTIVE OF WHICH OF SAID TRANSISTORS IS CONDUCTIVE.
Claim 2
Dependent Claim
181 words
IN A DATA TRANSMISSION APPARATUS, IN COMBINATION, A SOURCE OF PERIODIC WAVES, DATA RESPONSIVE MEANS OPERATIVE TO PRODUCE AT RESPECTIVE TERMINALS COMPLEMENTARY LEVEL SIGNALS THE BINARY STATUS OF WHICH IS DATA-SIGNIFICANT, AND BALANCED DOUBLE GATE MEANS COMPRISING A PAIR OF TRANSISTORS OF THE SAME CONDUCTIVITY TYPE, EACH SAID TRANSISTOR HAVING AN EMITTER, A BASE AND A COLLECTOR, SAID COLLECTORS BEING CONNECTED TO LOAD IMPEDANCE MEANS PRESENTING THE SAME RESISTANCE TO CURRENT FROM EACH OF SAID COLLECTORS, MEANS CONNECTING SAID SOURCE OF PERIODIC WAVES TO ONE OF SAID BASES, MATCHED CLASS A BIAS SUPPLIES CONNECTED TO SAID BASES, AND SELECTIVE CUT-OFF MEANS COMPRISING A CIRCUIT CONNECTION BETWEEN EACH OF SAID EMITTERS AND A RESPECTIVE ONE OF SAID TERMINALS OF SAID DATA RESPONSIVE MEANS ADAPTED TO CUT ONE OF SAID TRANSISTORS OFF AND RENDER THE OTHER CONDUCTIVE IN ITS ACTIVE REGION IN ACCORDANCE WITH THE STATUS OF SAID DATA RESPONSIVE MEANS, SAID GATE MEANS BEING SYMMETRICAL AND OPERATIVE IN RESPONSE TO SAID BIAS SUPPLIES TO YIELD THE SAME D.C. OUTPUT COMPONENT TO SAID LOAD IMPEDANCE IRRESPECTIVE OF WHICH OF SAID TRANSISTORS IS CONDUCTIVE.
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |