US2694659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction heat treatment method
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1950-09-29
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Granted: 1954-11-16
•
Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
- 👤 Samuel H Norton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/06; C21D1/09; C21D1/10; Y; Y02; Y02P; Y02P10/00; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE METHOD OF MAKING TEMPERED METAL COILS WHICH COMPRISES HEATING A STRAND OF METAL TO FORGING TEMERATURES, COILING THE HEATED STRNAD, QUENCHING THE COIL WITH A FLUID HAVING AN APPRECIABLE LATENT HEAT ABSORPTION CAPACITY, FORMING A COATING OF SAID FLUID ON THE QUENCHED COIL, WINDING THE COATED COIL ON A GROUNDED MANDREL, PASSING THE COIL ON THE MANDREL THROUGH A HIGH FREQUENCY INDUCTION FURNACE, HEATING THE COATED COIL ON THE MANDREL BY HIGH FREQUENCY CURRENT IN SAID INDUCTION FURNACE, GROUNDING OUT INDUCED CURRENTS IN THE COIL BY CONTACT OF THE COIL WITH THE MANDREL, AND ABSORBING EXCESS HEAT INDUCED IN POORLY GROUNDED SEGMENTS OF THE COIL BY LATENT HEAT OF VAPORIZATION OF THE COATING ON THE COIL.
Claim 2
Independent Claim
117 words
THE METHOD OF MAKING TEMPERED METAL COILS WHICH COMPRISES HEATING A STRAND OF METAL TO FORGING TEMERATURES, COILING THE HEATED STRNAD, QUENCHING THE COIL WITH A FLUID HAVING AN APPRECIABLE LATENT HEAT ABSORPTION CAPACITY, FORMING A COATING OF SAID FLUID ON THE QUENCHED COIL, WINDING THE COATED COIL ON A GROUNDED MANDREL, PASSING THE COIL ON THE MANDREL THROUGH A HIGH FREQUENCY INDUCTION FURNACE, HEATING THE COATED COIL ON THE MANDREL BY HIGH FREQUENCY CURRENT IN SAID INDUCTION FURNACE, GROUNDING OUT INDUCED CURRENTS IN THE COIL BY CONTACT OF THE COIL WITH THE MANDREL, AND ABSORBING EXCESS HEAT INDUCED IN POORLY GROUNDED SEGMENTS OF THE COIL BY LATENT HEAT OF VAPORIZATION OF THE COATING ON THE COIL.
References Cited (Backward Citations)
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Cited
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US2320801A
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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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |