US2723926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of winding a tungsten coil on an iron mandrel
Assignee: Westinghouse Electric Corp
•
Filing: 1952-10-30
•
Granted: 1955-11-15
•
Expires: 1972-10-30
Abstract
No abstract record available.
Inventors
- 👤 Bellott Emile Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:29
CPC Classifications
B; B21; B21F; B21F3/00; B21F3/02; B21F3/04; H; H01; H01K; H01K3/00; H01K3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF FABRICATING A COIL AND MANDREL ASSEMBLY COMPRISING ELECTROLYTICALLY CLEANING TUNGSTEN WIRE TO REMOVE SURFACE CONTAMINANTS THEREFROM, WINDING THE CLEAN TUNGSTEN WIRE ON AN IRON MANDREL; DEGREASING THE WOUND COIL, ANNEALING THE COIL IN WET HYDROGEN AT ABOUT 850*C. TO REMOVE ALL STRESSES AND STRAINS THEREIN, CUTTING THE WOUND COIL TO LENGTH, BAKING THE ANNEALED COIL IN WET HYDROGEN AT ABOUT 850*C. FOR APPROXIMATELY 10 MINUTES TO SET THE COIL STRUCTURE ABOUT A STRAIGHT AXIS WITH UNIFORMLY SPACED TURNS TO INSURE UNIFORM LENGTH AND TO REMOVE ABSORBED GASES THEREFROM.
Claim 2
Independent Claim
91 words
THE METHOD OF FABRICATING A COIL AND MANDREL ASSEMBLY COMPRISING ELECTROLYTICALLY CLEANING TUNGSTEN WIRE TO REMOVE SURFACE CONTAMINANTS THEREFROM, WINDING THE CLEAN TUNGSTEN WIRE ON AN IRON MANDREL; DEGREASING THE WOUND COIL, ANNEALING THE COIL IN WET HYDROGEN AT ABOUT 850*C. TO REMOVE ALL STRESSES AND STRAINS THEREIN, CUTTING THE WOUND COIL TO LENGTH, BAKING THE ANNEALED COIL IN WET HYDROGEN AT ABOUT 850*C. FOR APPROXIMATELY 10 MINUTES TO SET THE COIL STRUCTURE ABOUT A STRAIGHT AXIS WITH UNIFORMLY SPACED TURNS TO INSURE UNIFORM LENGTH AND TO REMOVE ABSORBED GASES THEREFROM.
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) | 1958-11-14 | 1959-05-16 | 1959-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-14 | 1963-05-16 | 1963-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-14 | 1967-05-16 | 1967-11-15 | $7700.00 | Window Closed / Lapsed |