Patent FR1377362A successfully refreshed from Google Patents.
US4329971A
Expired / Lapsed
US
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Electromagnetic propulsion power system
Assignee: Northrop Grumman Corp
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Filing: 1980-01-14
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Granted: 1982-05-18
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Expires: 2000-01-14
Abstract
Abstract An electromagnetic propulsion power supply system utilizing mutual induction coils as transformers to provide high currents to the projectile rail conductors.
Inventors
- 👤 George A. Kemeny
- 👤 Joseph G. Gorman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:30
CPC Classifications
F; F41; F41B; F41B6/00; F41B6/006
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
152 words
A circuit for supplying DC power to a pair of parallel conductors utilized in an electromagnetic projectile launcher, said circuit comprising means for providing high DC current; an induction coil for temporary storing electromagnetic energy; means for opening said circuit when the current flowing through said induction coil is high; said current providing means, induction coil, and means for opening said circuit being electrically connected in a series loop; turns cooperatively associated with said induction coil; and leads electrically connecting said turns to said pair of parallel conductors; said circuit being so arranged that said circuit opening means is opened to initiate launching said projectile and energy stored in said induction coil is rapidly converted in said turns to a higher current than that provided by said current providing means, said higher current being supplied via said leads to said pair of parallel conductors substantially continuously during the launch of said projectile.
Claim 2
Dependent Claim
152 words
A circuit for supplying DC power to a pair of parallel conductors utilized in an electromagnetic projectile launcher, said circuit comprising means for providing high DC current; an induction coil for temporary storing electromagnetic energy; means for opening said circuit when the current flowing through said induction coil is high; said current providing means, induction coil, and means for opening said circuit being electrically connected in a series loop; turns cooperatively associated with said induction coil; and leads electrically connecting said turns to said pair of parallel conductors; said circuit being so arranged that said circuit opening means is opened to initiate launching said projectile and energy stored in said induction coil is rapidly converted in said turns to a higher current than that provided by said current providing means, said higher current being supplied via said leads to said pair of parallel conductors substantially continuously during the launch of said projectile.
Claim 3
Dependent Claim
34 words
A circuit as set forth in claim 1 and further comprising an insulating strip disposed on at least one of said conductors adjacent one end thereof and an armature slideably disposed between said conductors.
Claim 4
Dependent Claim
18 words
A circuit as set forth in claim 2, wherein said insulating strip breaks down at a predetermined voltage.
Claim 5
Dependent Claim
22 words
A circuit as set forth in claim 2 and further comprising means for initiating movement of said armature from said insulating strip.
Claim 6
Dependent Claim
30 words
A circuit as set forth in claim 1, wherein said turns are on a secondary coil which cooperates with said first mentioned coil by linking substantially the same magnetic flux.
Claim 7
Dependent Claim
21 words
A circuit as set forth in claim 1, wherein said turns are a predetermined number of turns of said induction coil.
Claim 8
Dependent Claim
28 words
A circuit as set forth in claim 2, wherein said turns form a secondary coil which cooperate with said first mentioned coil by linking the same magnetic flux.
Claim 9
Dependent Claim
21 words
A circuit as set forth in claim 2, wherein said turns are a predetermined number of turns of said induction coil.
Claim 10
Dependent Claim
21 words
A circuit as set forth in claim 4 and further comprising means for initially moving said armature from said insulating strip.
Claim 11
Dependent Claim
21 words
A circuit as set forth in claim 4, wherein said turns are a predetermined number of turns of said induction coil.
Claim 12
Dependent Claim
29 words
A circuit as set forth in claim 3, wherein said turns form a secondary coil which cooperates with said first mention coil by linking substantially the same magnetic flux.
Claim 13
Dependent Claim
21 words
A circuit as set forth in claim 3, wherein said turns are a predetermined number of turns of said induction coil.
Claim 14
Dependent Claim
93 words
A circuit for supplying DC power to a pair of parallel conductors utilized in an electromagnetic projectile launcher, said circuit comprising means for providing high DC current; an induction coil for temporarily storing electromagnetic energy; means for closing the circuit; said current providing means, said circuit closing means and said induction coil being connected in a series loop; and a diverter switch for switching current from the series circuit containing said induction coil said circuit closing means and said current providing means to a circuit containing said induction coil, and said parallel conductors.
Claim 15
Dependent Claim
93 words
A circuit for supplying DC power to a pair of parallel conductors utilized in an electromagnetic projectile launcher, said circuit comprising means for providing high DC current; an induction coil for temporarily storing electromagnetic energy; means for closing the circuit; said current providing means, said circuit closing means and said induction coil being connected in a series loop; and a diverter switch for switching current from the series circuit containing said induction coil said circuit closing means and said current providing means to a circuit containing said induction coil, and said parallel conductors.
Claim 16
Dependent Claim
19 words
A circuit as set forth in claim 13 and further comprising an armature slideably engaging said pair of conductors.
Claim 17
Dependent Claim
30 words
A circuit as set forth in claim 14 wherein the diverter switch closes the circut including the pair of conductors prior to opening the circuit including the current providing means.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |