US3170115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage breakdown test circuit
Assignee: AT&T Inc
•
Filing: 1960-07-20
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Granted: 1965-02-16
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Expires: 1980-07-20
Abstract
No abstract record available.
Inventors
- 👤 Jr Clarence J Tabor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:41
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/50; G01R31/66; G01R31/67
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
APPARATUS FOR TESTING A PLURALITY OF ELEMENTS TO DETERMINE WHETHER THERE IS ANY LEAKAGE THEREBETWEEN, WHICH COMPRISES: A SOURCE OF POLYPHASE VOLTAGE HAVING A PLURALITY OF OUTPUT LEADS CORRESPONDING TO THE DIFFERENT PHASES THEREOF; SWITCHING MEANS SELECTIVELY OPERABLE FROM A FIRST TO A SECOND POSITION FOR CONNECTING SAID ELEMENTS TO THE OUTPUT LEADS OF SAID POLYPHASE VOLTAGE SOURCE, IN SAID FIRST POSITION A PLURALITY OF FIRST GROUPS OF THE ELEMENTS BEING CONNECTED TO SAID OUTPUT LEADS IN A MANNER SUCH THAT EACH OF SAID FIRST GROUPS IS CONNECTED TO A DIFFERENT OUTPUT LEAD, AND IN SAID SECOND POSITION A PLURALITY OF SECOND GROUPS OF THE ELEMENTS BEING CONNECTED TO SAID OUTPUT LEADS IN A MANNER SUCH THAT EACH OF SAID SECOND GROUPS IS CONNECTED TO A DIFFERENT OUTPUT LEAD, SAID FIRST AND SECOND GROUPS BEING SELECTED SUCH THAT THOSE ELEMENTS BELONGING TO THE SAME FIRST GROUP ARE EACH IN A DIFFERENT SECOND GROUP; MEANS CONNECTED TO EACH ELEMENT AND RESPONSIVE TO A PREDETERMINED CURRENT THERETHROUGH FOR INDICATING LEAKAGE BETWEEN THAT ELEMENT AND ANY OF THE OTHER ELEMENTS; AND
Claim 2
Dependent Claim
178 words
APPARATUS FOR TESTING A PLURALITY OF ELEMENTS TO DETERMINE WHETHER THERE IS ANY LEAKAGE THEREBETWEEN, WHICH COMPRISES: A SOURCE OF POLYPHASE VOLTAGE HAVING A PLURALITY OF OUTPUT LEADS CORRESPONDING TO THE DIFFERENT PHASES THEREOF; SWITCHING MEANS SELECTIVELY OPERABLE FROM A FIRST TO A SECOND POSITION FOR CONNECTING SAID ELEMENTS TO THE OUTPUT LEADS OF SAID POLYPHASE VOLTAGE SOURCE, IN SAID FIRST POSITION A PLURALITY OF FIRST GROUPS OF THE ELEMENTS BEING CONNECTED TO SAID OUTPUT LEADS IN A MANNER SUCH THAT EACH OF SAID FIRST GROUPS IS CONNECTED TO A DIFFERENT OUTPUT LEAD, AND IN SAID SECOND POSITION A PLURALITY OF SECOND GROUPS OF THE ELEMENTS BEING CONNECTED TO SAID OUTPUT LEADS IN A MANNER SUCH THAT EACH OF SAID SECOND GROUPS IS CONNECTED TO A DIFFERENT OUTPUT LEAD, SAID FIRST AND SECOND GROUPS BEING SELECTED SUCH THAT THOSE ELEMENTS BELONGING TO THE SAME FIRST GROUP ARE EACH IN A DIFFERENT SECOND GROUP; MEANS CONNECTED TO EACH ELEMENT AND RESPONSIVE TO A PREDETERMINED CURRENT THERETHROUGH FOR INDICATING LEAKAGE BETWEEN THAT ELEMENT AND ANY OF THE OTHER ELEMENTS; AND
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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) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |