US3387224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring systems with common-mode interference suppression
Assignee: Leeds and Northrup Co
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Filing: 1965-05-21
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Granted: 1968-06-04
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Expires: 1985-05-21
Abstract
No abstract record available.
Inventors
- 👤 Donald W Fleischer
- 👤 Garden Murray
- 👤 William P Hamilton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:31
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/06; G01; G01K; G01K7/00; G01K7/02; G01K7/021
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A MEASURING SYSTEM COMPRISING A PLURALITY OF ANALOG-INPUT CHANNELS EACH PROVIDING A SIGNAL REPRESENTATIVE OF A MEASURED CONDITION, A TRANSMISSION LINE HAVING UNGROUNDED CONDUCTORS, A PLURALITY OF RELAYS EACH HAVING NORMALLY-CLOSED CONTACTS CONNECTED TO THE CONDUCTORS OF ONE OF SAID CHANNELS AND NORMALLY-OPEN CONTACTS CONNECTED TO THE UNGROUNDED CONDUCTORS OF SAID TRANSMISSION LINE, A PLURALITY OF SIGNAL-STORAGE CAPACITORS EACH CONNECTED ACROSS THE MOVABLE CONTACTS OF ONE OF SAID RELAYS AND HAVING A CAPACITANCE SUBSTANTIALLY GREATER BY A FACTOR THAN THE STRAY CAPACITANCE TO GROUND OF THE UNGROUNDED CONDUCTORS OF SAID TRANSMISSION LINE, AN AMPLIFIER HAVING AN INPUT CIRCUIT FOR CONNECTION TO SAID TRANSMISSION LINE, MEANS FOR EFFECTING SELECTIVE ENERGIZATION OF SAID RELAYS TO TRANSFER THE CORRESPONDING SIGNAL-STORAGE CAPACITOR FROM CONNECTION TO THE CONDUCTORS OF THE ASSOCIATED ANALOG-INPUT CHANNEL TO CONNECTION WITHIN THE CONDUCTORS OF SAID TRANSMISSION LINE, AND
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) | 1971-06-04 | 1971-12-04 | 1972-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-04 | 1975-12-04 | 1976-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-04 | 1979-12-04 | 1980-06-04 | $7700.00 | Window Closed / Lapsed |