US3620068A
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Quench calorimeter
Assignee: Navistar International Corp
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Filing: 1970-02-24
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Granted: 1971-11-16
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Expires: 1990-02-24
Abstract
Abstract AN INSTRUMENT TO MEASURE AND RECORD THE CHANGE IN TEMPERATURE OF A QUENCHING FLUID DURING A QUNECH CYCLE FOR A METAL SPECIMEN. THE INSTRUMENT INCLUDES A QUENCH TANK FILLED WITH A QUENCHING FLUID INTO WHICH THE SPECIMEN IS IMMERSED AND A PLURALITY OF THERMOCOUPLES CONNECTED IN SERIES TO FORM A THERMOPILE WHICH IS CONNECTED TO AN ELECTRICAL RECORDER. THE QUENCHING FLUID IS CIRCULATED INTO THE TANK AT ITS BOTTOM AND OUT ITS TOP. THE OPPOSING JUNCTIONS OF THE THERMOCOUPLES ARE SUITABLY LOCATED TO BE SENSITIVE TO THE TEMPERATURE OF THE INFLOWING AND OUTFLOWING FLUID, RESPECTIVELY.
Inventors
- 👤 Robert P Cary
- 👤 Philip E Cary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:51
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/48; G01N25/4873; G01N25/4893; G01N33/00; G01N33/20; G01N33/202; G01N33/2022; G01N33/2025
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |