US4247494A
Expired / Lapsed
US
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Case priming
Assignee: Eley Ltd
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Filing: 1978-08-08
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Granted: 1981-01-27
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Expires: 1998-08-08
Abstract
Abstract Production of styphnate and azide explosives in situ in explosive devices including both ammunition and detonators particularly, though not exclusively, involving formation of premixes of relatively insensitive materials.
Inventors
- 👤 George B. Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:53
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0008; C06C; C06C7/00; C06C7/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
In a method of priming a plurality of explosive devices by incorporating a body of priming explosive comprising a primary explosive compound with an element of each device the improvement comprising dosing into each device a quantity of a substantially premix containing relatively insensitive components that will, in the presence of a liquid reaction medium, chemically react together forming said primary explosive compound and dosing into each element a quantity of said liquid reaction medium so as to cause said components to chemically react together thereby forming said primary explosive compound.
Claim 2
Dependent Claim
91 words
In a method of priming a plurality of explosive devices by incorporating a body of priming explosive comprising a primary explosive compound with an element of each device the improvement comprising dosing into each device a quantity of a substantially premix containing relatively insensitive components that will, in the presence of a liquid reaction medium, chemically react together forming said primary explosive compound and dosing into each element a quantity of said liquid reaction medium so as to cause said components to chemically react together thereby forming said primary explosive compound.
Claim 3
Dependent Claim
22 words
A method according to claim 22 wherein said premix is dosed into respective elements before said liquid reaction medium is added thereto.
Claim 4
Dependent Claim
29 words
A method according to claim 1 wherein the premix includes all ingredients and components required to make a priming explosive composition upon the addition of said reaction medium thereto.
Claim 5
Dependent Claim
31 words
A method according to claim 3 wherein said premix comprises an oxidiser, a sensitiser for said primary explosive compound, a frictionator and components which when reacted form said primary explosive compound.
Claim 6
Dependent Claim
31 words
A method according to claim 3 wherein said premix comprises an oxidiser, a sensitiser for said primary explosive compound, a fuel and components which when reacted form said primary explosive compound.
Claim 7
Dependent Claim
14 words
A method according to claim 4 or claim 5 wherein said sensitiser is tetrazene.
Claim 8
Dependent Claim
12 words
A method according to claim 5 wherein said fuel comprises calcium silicide.
Claim 9
Dependent Claim
12 words
A method according to claim 5 wherein said fuel comprises antimony sulphide.
Claim 10
Dependent Claim
13 words
A method according to claim 1 wherein said elements are rimfire cartridge cases.
Claim 11
Dependent Claim
12 words
A method according to claim 1 wherein said elements are centre-fire caps.
Claim 12
Dependent Claim
102 words
In a method of priming a plurality of explosive devices by incorporating a discrete body of priming explosive comprising a primary explosive compound with an element of each device, the improvement comprising forming each said body of priming explosive by providing a dose of a substantially dry premix comprising relatively insensitive components that will, in the presence of a liquid reaction medium, react together forming said primary explosive compound, and combining said dose of premix with a quantity of said reaction medium so as to cause said components to chemically react together thereby forming said discrete body comprising said primary explosive compound.
Claim 13
Dependent Claim
102 words
In a method of priming a plurality of explosive devices by incorporating a discrete body of priming explosive comprising a primary explosive compound with an element of each device, the improvement comprising forming each said body of priming explosive by providing a dose of a substantially dry premix comprising relatively insensitive components that will, in the presence of a liquid reaction medium, react together forming said primary explosive compound, and combining said dose of premix with a quantity of said reaction medium so as to cause said components to chemically react together thereby forming said discrete body comprising said primary explosive compound.
Claim 14
Dependent Claim
30 words
A method according to claim 11 wherein said premix contains all the ingredients and components required to make a priming explosive composition upon the addition of said reaction medium thereto.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |