US3258691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Converter with compensation for ther- mal reverse d.c. current error
Assignee: —
•
Filing: —
•
Granted: 1966-06-28
•
Expires: 1983-06-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:04
CPC Classifications
G; G01; G01R; G01R21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN A THERMAL CURRENT MEASURING SYSTEM, A THERMAL CONVERTER MEANS COMPRISING A PLURALITY OF THERMAL CONVERTERS EACH HAVING A THERMOCOUPLE AND A THERMAL RESISTANCE ELEMENT INSIDE AN ENVELOPE WITH LEAD WIRES FOR SAID RESISTANCE ELEMENT EXTENDING THROUGH THE ENVELOPE AND OF A MATERIAL DIFFERENT THAN THAT OF THE RESISTANCE ELEMENT THE RESISTANCE ELEMENT HAVING A TEMPERATURE DUE TO CURRENT FLOW OF ONE POLARITY THROUGH THE LEAD WIRES AND ELEMENT WHICH IS DIFFERENT FROM THE TEMPARATURE FOR THE SAME VALUE CURRENT FLOW OF THE OPPOSITE POLARITY THROUGH THE LEAD WIRES AND ELEMENT, GIVING RISE TO A REVERSE D.C. CURRENT ERROR, EACH THERMOCOUPLE HAVING A D.C. OUTPUT, THE RESISTANCE ELEMENT OF THE CONVERTERS BEING CONNECTED WITH THEIR REVERSE D.C. CURRENT ERRORS IN OPPOSITION, AND SAID THERMOCOUPLES BEING CONNECTED WITH THEIR D.C. OUTPUTS AIDING, WHEREBY THE COMBINED D.C. OUTPUTS OF THE THERMAL CONVERTERS ARE RELATIVELY INSENSITIVE OF THE DIRECT CURRENT POLARITY OF THE CURRENT THROUGH THE RESISTANCE ELEMENTS.
Claim 2
Dependent Claim
155 words
IN A THERMAL CURRENT MEASURING SYSTEM, A THERMAL CONVERTER MEANS COMPRISING A PLURALITY OF THERMAL CONVERTERS EACH HAVING A THERMOCOUPLE AND A THERMAL RESISTANCE ELEMENT INSIDE AN ENVELOPE WITH LEAD WIRES FOR SAID RESISTANCE ELEMENT EXTENDING THROUGH THE ENVELOPE AND OF A MATERIAL DIFFERENT THAN THAT OF THE RESISTANCE ELEMENT THE RESISTANCE ELEMENT HAVING A TEMPERATURE DUE TO CURRENT FLOW OF ONE POLARITY THROUGH THE LEAD WIRES AND ELEMENT WHICH IS DIFFERENT FROM THE TEMPARATURE FOR THE SAME VALUE CURRENT FLOW OF THE OPPOSITE POLARITY THROUGH THE LEAD WIRES AND ELEMENT, GIVING RISE TO A REVERSE D.C. CURRENT ERROR, EACH THERMOCOUPLE HAVING A D.C. OUTPUT, THE RESISTANCE ELEMENT OF THE CONVERTERS BEING CONNECTED WITH THEIR REVERSE D.C. CURRENT ERRORS IN OPPOSITION, AND SAID THERMOCOUPLES BEING CONNECTED WITH THEIR D.C. OUTPUTS AIDING, WHEREBY THE COMBINED D.C. OUTPUTS OF THE THERMAL CONVERTERS ARE RELATIVELY INSENSITIVE OF THE DIRECT CURRENT POLARITY OF THE CURRENT THROUGH THE RESISTANCE ELEMENTS.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |