US3079465A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test device for telecommunication systems
Assignee: International Standard Electric Corp
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Filing: 1959-04-17
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Granted: 1963-02-26
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Expires: 1979-04-17
Abstract
No abstract record available.
Inventors
- 👤 Simon Stephane Marcel C Victor
- 👤 Raedt Egide Jacob Hendrik De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:03
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A TEST DEVICE FOR TELECOMMUNICATION SYSTEMS COMPRISING A FIRST INPUT TERMINAL TO WHICH ALTERNATING VOLTAGE OF A PREDETERMINED FREQUENCY HAVING ONE OF A PLURALITY OF PREDETERMINED DIFFERNT PHASES MAY BE APPLIED, A SECOND INPUT TERMINAL TO WHICH ALTERNATING VOLTAGE OF SAID FREQUENCY MAY BE APPLIED IN SUCCESSIVE STEPS, EACH STEP HAVING A DIFFERENT ONE OF SAID PLURALITY OF PHASES, A FIRST TRANSISTOR, A PHASE DISCRIMINATOR CONNECTED BETWEEN SAID FIRST AND SECOND INPUT TERMINALS AND SAID FIRST TRANSISTOR, MEANS IN SAID DISCRIMINATOR FOR CAUSING SAID FIRST TRANSISTOR TO CONDUCT AND THUS RECTIFY THE ALTERNATING VOLTAGE WHEN THE PHASE MATCH BETWEEN THE ALTERNATING VOLTAGES APPLIED AT SAID INPUTS IS GREATER THAN A PREDETERMINED PHASE ANGLE AND FOR CAUSING SAID FIRST TRANSISTOR TO CEASE TO CONDUCT WHEN THE PHASE MATCH BETWEEN SAID ALTERNATING VOLTAGES IS LESS THAN SAID PREDETERMINED PHASE ANGLE A SECOND TRANSISTOR CONNECTED TO SAID FIRST TRANSISTOR, CIRCUIT MEANS CONNECTED TO SAID FIRST AND SECOND TRANSISTORS AND RESPONSIVE TO THE CONDUCTIVITY OF SAID FIRST TRANSISTOR FOR BIASING SAID SECOND TRANSISTOR IN ITS NON-CONDUCTING CONDITION AND RESPONSIVE TO THE CESSATION OF CONDUCTIVITY OF SAID FIRST TRANSISTOR FOR CAUSING SAID SECOND TRANSISTOR TO CONDUCT, AND LOAD MEANS RESPONSIVE TO THE CONDUCTIVITY OF SAID SECOND TRANSISTOR.
Claim 2
Dependent Claim
202 words
A TEST DEVICE FOR TELECOMMUNICATION SYSTEMS COMPRISING A FIRST INPUT TERMINAL TO WHICH ALTERNATING VOLTAGE OF A PREDETERMINED FREQUENCY HAVING ONE OF A PLURALITY OF PREDETERMINED DIFFERNT PHASES MAY BE APPLIED, A SECOND INPUT TERMINAL TO WHICH ALTERNATING VOLTAGE OF SAID FREQUENCY MAY BE APPLIED IN SUCCESSIVE STEPS, EACH STEP HAVING A DIFFERENT ONE OF SAID PLURALITY OF PHASES, A FIRST TRANSISTOR, A PHASE DISCRIMINATOR CONNECTED BETWEEN SAID FIRST AND SECOND INPUT TERMINALS AND SAID FIRST TRANSISTOR, MEANS IN SAID DISCRIMINATOR FOR CAUSING SAID FIRST TRANSISTOR TO CONDUCT AND THUS RECTIFY THE ALTERNATING VOLTAGE WHEN THE PHASE MATCH BETWEEN THE ALTERNATING VOLTAGES APPLIED AT SAID INPUTS IS GREATER THAN A PREDETERMINED PHASE ANGLE AND FOR CAUSING SAID FIRST TRANSISTOR TO CEASE TO CONDUCT WHEN THE PHASE MATCH BETWEEN SAID ALTERNATING VOLTAGES IS LESS THAN SAID PREDETERMINED PHASE ANGLE A SECOND TRANSISTOR CONNECTED TO SAID FIRST TRANSISTOR, CIRCUIT MEANS CONNECTED TO SAID FIRST AND SECOND TRANSISTORS AND RESPONSIVE TO THE CONDUCTIVITY OF SAID FIRST TRANSISTOR FOR BIASING SAID SECOND TRANSISTOR IN ITS NON-CONDUCTING CONDITION AND RESPONSIVE TO THE CESSATION OF CONDUCTIVITY OF SAID FIRST TRANSISTOR FOR CAUSING SAID SECOND TRANSISTOR TO CONDUCT, AND LOAD MEANS RESPONSIVE TO THE CONDUCTIVITY OF SAID SECOND TRANSISTOR.
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) | 1966-02-25 | 1966-08-27 | 1967-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-25 | 1970-08-27 | 1971-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-25 | 1974-08-27 | 1975-02-26 | $7700.00 | Window Closed / Lapsed |