US3737990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a coil for an electromagnetic high energy impact apparatus
Assignee: Boeing Co
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Filing: 1971-04-12
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Granted: 1973-06-12
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Expires: 1991-04-12
Abstract
Abstract An apparatus utilizing electromagnetic energy for producing high impact forces by means of a ram propelled against a work piece. A specific utilization of the apparatus is in the installation of fasteners such as rivets in structural assemblies. The apparatus described herein is the work center of an electromagnetic impact tool and comprises the following components: electromagnetic high energy pulse coil, ram means, aerostatic bearing means and connector means.
Inventors
- 👤 H Schut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:28
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/24; B21J7/00; B21J7/20; B21J7/22; B21J7/30; H01F7/00; H01F7/06; H01F7/20; H01F7/202; Y; Y10; Y10S; Y10S29/00; Y10S29/033; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
The method of making an electrical coil comprising the steps of providing a conductor having a rectangular cross-sectional area; wrapping said conductor by winding in overlapping fashion and under tension a polyimide tape around said conductor, said polyimide tape having fluorocarbon resin coatings on both sides thereof; winding under tension a plurality of turns of said conductor so that opposing surfaces of said fluorocarbon resin coatings between windings of said conductor are in direct contact; providing semicircular notches on each side of said rectangular conductor under said tape before winding the last of said plurality of turns and then bending and folding down said conductor along a line extending between two of said notches so as to extend radially from said coil body after completion of said coil winding and before heating to provide the outer terminal of said coil; heating sais plurality of turns of said conductor to the fusing temperature of said fluorocarbon resin to cause melting and fusion together of said opposing surfaces of fluorocarbon resin coatings and adherence of said tape to said conductor and then cooling said plurality of turns of said conductor to form said coil.
Claim 2
Independent Claim
192 words
The method of making an electrical coil comprising the steps of providing a conductor having a rectangular cross-sectional area; wrapping said conductor by winding in overlapping fashion and under tension a polyimide tape around said conductor, said polyimide tape having fluorocarbon resin coatings on both sides thereof; winding under tension a plurality of turns of said conductor so that opposing surfaces of said fluorocarbon resin coatings between windings of said conductor are in direct contact; providing semicircular notches on each side of said rectangular conductor under said tape before winding the last of said plurality of turns and then bending and folding down said conductor along a line extending between two of said notches so as to extend radially from said coil body after completion of said coil winding and before heating to provide the outer terminal of said coil; heating sais plurality of turns of said conductor to the fusing temperature of said fluorocarbon resin to cause melting and fusion together of said opposing surfaces of fluorocarbon resin coatings and adherence of said tape to said conductor and then cooling said plurality of turns of said conductor to form said coil.
Claim 3
Dependent Claim
20 words
The method according to claim 1 wherein said bending comprises bending said conductor at an angle of about 45 degrees.
Claim 4
Dependent Claim
38 words
The method according to claim 1 including the further step of wrapping a plurality of turns of polyimide tape on the outer circumference of said coil after folding down said conductor and before heating said plurality of turns.
Claim 5
Dependent Claim
58 words
The method according to claim 3 comprising proistioning a first polimide sheet on each coil face with the outer uncoated surface of each of said first sheets facing away from each of said coil faces after wrapping said plurality of turns of said tape on the outer circumference of said coil and before heating said plurality of turns.
Claim 6
Dependent Claim
37 words
The method according to claim 4 comprising positioning at least a further polyimide sheet having fluorocarbon coatings on both sides thereof between each of sAid coil faces and said first sheets before heating said plurality of turns.
Claim 7
Dependent Claim
30 words
The method according to claim 4 comprising the further step of applying pressure to the outer uncoated surfaces of each of said first sheets while heating said plurality of turns.
Claim 8
Dependent Claim
39 words
The method according to claim 3 comprising machining off a portion of said plurality of turns of polyimide tape on the outer circumference of said coil after cooling said plurality of turns of said conductor to form said coil.
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |