Patent US3350701A successfully refreshed from Google Patents.
US3350701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring circuit employing oppositely varying voltage dependent capacitive means
Assignee: Bell and Howell Co
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Filing: 1965-06-08
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Granted: 1967-10-31
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Expires: 1985-06-08
Abstract
No abstract record available.
Inventors
- 👤 Norton W Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:45
CPC Classifications
G; G08; G08B; G08B21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A MEASURING SYSTEM COMPRISING A BRIDGE CIRCUIT HAVING FIRST AND SECOND ARMS, EACH ARM COMPRISING A CAPACITIVE ELEMNT CONNECTED IN PARALLEL ACROSS A VOLTAGE SENSITIVE VARIABLE CAPACITANCE MEANS, A TRANSFORMER WINDING HAVING FIRST AND SECOND END TERMINALS AND A CENTER-TAP TERMINAL, MEANS CONNECTING THE FIRST TERMINAL OF SAID WINDING TO ONE SIDE OF THE PARALLEL CIRCUIT OF SAID FIRST BRIDGE ARM AND MEANS CONNECTING THE SECOND END TERMINAL OF SAID WINDING TO ONE SIDE OF THE PARALLEL CIRCUIT OF SAID SECOND BRIDGE ARM, A POTENTIAL DIVIDER COMPRISING FIRST AND SECOND RESISTANCE MEANS CONNECTED IN SERIES TO GROUND, MEANS CONNECTING THE FIRST RESISTANCE MEANS TO THE REMAIN ING SIDE OF THE PARALLEL CIRCUIT IN SAID SECOND ARM TO GROUND, A BIAS SOURCE CONNECTED BETWEEN SAID CENTER-TAP AND THE JUNCTION FORMED BY THE SERIES CONNECTED FIRST AND SECOND RESISTANCE MEANS, SAID BIAS SOURCE POLED TO COMPLETE A PATH FOR REVERSE BIASING SAID VARIABLE CAPACITIVE
Claim 2
Dependent Claim
152 words
A MEASURING SYSTEM COMPRISING A BRIDGE CIRCUIT HAVING FIRST AND SECOND ARMS, EACH ARM COMPRISING A CAPACITIVE ELEMNT CONNECTED IN PARALLEL ACROSS A VOLTAGE SENSITIVE VARIABLE CAPACITANCE MEANS, A TRANSFORMER WINDING HAVING FIRST AND SECOND END TERMINALS AND A CENTER-TAP TERMINAL, MEANS CONNECTING THE FIRST TERMINAL OF SAID WINDING TO ONE SIDE OF THE PARALLEL CIRCUIT OF SAID FIRST BRIDGE ARM AND MEANS CONNECTING THE SECOND END TERMINAL OF SAID WINDING TO ONE SIDE OF THE PARALLEL CIRCUIT OF SAID SECOND BRIDGE ARM, A POTENTIAL DIVIDER COMPRISING FIRST AND SECOND RESISTANCE MEANS CONNECTED IN SERIES TO GROUND, MEANS CONNECTING THE FIRST RESISTANCE MEANS TO THE REMAIN ING SIDE OF THE PARALLEL CIRCUIT IN SAID SECOND ARM TO GROUND, A BIAS SOURCE CONNECTED BETWEEN SAID CENTER-TAP AND THE JUNCTION FORMED BY THE SERIES CONNECTED FIRST AND SECOND RESISTANCE MEANS, SAID BIAS SOURCE POLED TO COMPLETE A PATH FOR REVERSE BIASING SAID VARIABLE CAPACITIVE
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) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |