US3441834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature compensation circuit for a differential transformer
Assignee: SCHAEVITZ ENG
•
Filing: 1964-02-03
•
Granted: 1969-04-29
•
Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Lawrence Moskowitz
- 👤 David W Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:17
CPC Classifications
G; G05; G05B; G05B1/00; G05B1/01; G05B1/02; G05B1/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
IN COMBINATION WITH A DIFFERENTIAL TRANSFORMER FOR PRODUCING AN OUTPUT INFORMATION SIGNAL IN ONE OF TWO DIRECTIONS AND BEING SUBJECTED TO TEMPERATURE CHANGES WHICH TEND TO SHIFT THE ZERO REFERENCE VOLTAGE OF SAID DIFFERENTIAL TRANSFORMER AND TO CHANGE THE OUTPUT SIGNAL IN EITHER OF TWO DIRECTIONS DEPENDENT UPON SAID CHANGES IN TEMPERATURE, A TEMPERATURE COMPENSATION CIRCUIT FOR ELIMINATING SAID SHIFT IN THE ZERO VOLTAGE LEVEL CAUSED BY SAID TEMPERATURE CHANGES COMPRISING FIRST AND SECOND COMPENSATING WINDINGS ASSOCIATED WITH SAID DIFFERENTIAL TRANSFORMER, A FIRST RESISTIVE NETWORK CONNECTED ACROSS SAID FIRST COMPENSATING WINDING TO PRODUCE A SIGNAL SO THAT THE OUTPUT SIGNAL PRODUCED BY SAID DIFFERENTIAL TRANSFORMER BY TEMPERATURE CHANGES IS OF A SINGLE DIRECTION, SAID SIGNAL OF A SINGLE DIRECTION REPRESENTING THE TOTAL SIGNAL VARIATION FROM SAID DIFFERENTIAL TRANSFORMER RESULTING FROM SAID TEMPERATURE CHANGES, AND A SECOND RESISTIVE NETWORK CONNECTED TO SAID SECOND COMPENSATING WINDING TO CANCEL THE PORTION OF THE OUTPUT SIGNAL PRODUCED BY SAID TEMPERATURE CHANGES.
Claim 2
Dependent Claim
157 words
IN COMBINATION WITH A DIFFERENTIAL TRANSFORMER FOR PRODUCING AN OUTPUT INFORMATION SIGNAL IN ONE OF TWO DIRECTIONS AND BEING SUBJECTED TO TEMPERATURE CHANGES WHICH TEND TO SHIFT THE ZERO REFERENCE VOLTAGE OF SAID DIFFERENTIAL TRANSFORMER AND TO CHANGE THE OUTPUT SIGNAL IN EITHER OF TWO DIRECTIONS DEPENDENT UPON SAID CHANGES IN TEMPERATURE, A TEMPERATURE COMPENSATION CIRCUIT FOR ELIMINATING SAID SHIFT IN THE ZERO VOLTAGE LEVEL CAUSED BY SAID TEMPERATURE CHANGES COMPRISING FIRST AND SECOND COMPENSATING WINDINGS ASSOCIATED WITH SAID DIFFERENTIAL TRANSFORMER, A FIRST RESISTIVE NETWORK CONNECTED ACROSS SAID FIRST COMPENSATING WINDING TO PRODUCE A SIGNAL SO THAT THE OUTPUT SIGNAL PRODUCED BY SAID DIFFERENTIAL TRANSFORMER BY TEMPERATURE CHANGES IS OF A SINGLE DIRECTION, SAID SIGNAL OF A SINGLE DIRECTION REPRESENTING THE TOTAL SIGNAL VARIATION FROM SAID DIFFERENTIAL TRANSFORMER RESULTING FROM SAID TEMPERATURE CHANGES, AND A SECOND RESISTIVE NETWORK CONNECTED TO SAID SECOND COMPENSATING WINDING TO CANCEL THE PORTION OF THE OUTPUT SIGNAL PRODUCED BY SAID TEMPERATURE CHANGES.
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) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |