US3604353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast booster assembly
Assignee: Ireco Inc
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Filing: 1968-12-24
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Granted: 1971-09-14
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Expires: 1988-12-24
Abstract
Abstract The invention provides a booster assembly for a main explosive wherein the booster charge is formed from TNT and PETN and/or RDX and contains less RDX and/or PETN than required in comparably performing conventional booster charges of the cyclotol and pentolite types. The booster charge is a layer of a cast explosive of the group of pentolites, cyclotols and mixtures thereof, and a layer of cast TNT contiguous thereto. On a weight ratio basis, preferred pentolites contain PETN/TNT of from 60/40 to 40/60; and preferred cyclotols contain RDX/TNT of from 75/25 to 50/50, including Composition B which is a 60/40 RDX/TNT containing 1 percent of a microcrystalline wax.
Inventors
- 👤 Philip G Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:32
CPC Classifications
F; F42; F42B; F42B1/00; F42B1/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
28 words
In a booster assembly of claim 1, means for support of a primary initiator for said booster charge within said layer of cast explosive contiguous to said TNT.
Claim 2
Dependent Claim
48 words
A booster assembly of claim 2 wherein the thickness of said layer contiguous to said TNT if from about one-eighth to 3 inches and the weight ratio of said cast TNT to said layer of explosive contiguous thereto is within the range of from about 0.2:1 to 8:
Claim 3
Dependent Claim
94 words
In a booster assembly of claim 3, said pentolite containing PETN in a weight ratio to TNT of from about 60/40 to 40/60, and said cyclotol containing RDX in a weight ratio to TNT of from about 75/25 to 50/50; and an insert member, within said charge, containing from 0.1 to 3 grams of an explosive of the group of PETN, tetryl, and RDX and disposed, at least in part within said layer of cast explosive contiguous to said TNT for detonation in response to action of a primary initiator when supported as described.
Claim 4
Dependent Claim
27 words
A booster assembly of claim 4, wherein said explosive contained in said insert in PETN, and said layer of explosive contiguous with said TNT is a pentolite.
Claim 5
Dependent Claim
32 words
A booster assembly of claim 5 wherein said pentolite contains PETN in a weight ratio to TNT of 45/55, and about 2.25 grams of said PETN is containeD in said insert member.
Claim 6
Dependent Claim
25 words
A booster assembly of claim 5 wherein said booster charge has an overall weight in the range of from 85 to about 2500 grams. 19
Claim 7
Dependent Claim
38 words
A booster assembly of claim 7 wherein said layer of explosive contiguous to said layer of cast TNT is a top layer of said booster charge, and a cover layer of cast TNT superposed on said top layer.
Claim 8
Dependent Claim
27 words
In a booster assembly of claim 2 at least one tunnel member extending through said booster charge for support of a detonating fuse as said primary initiator.
Claim 9
Dependent Claim
50 words
In a booster assembly of claim 2, an insert member containing an explosive of the group of PETN, tetryl, and RDX; and disposed, at least in part, with said layer of cast explosive contiguous to said TNT for detonation in response to action of a primary initiator supported as described.
Claim 10
Dependent Claim
37 words
In a booster assembly of claim 2 a well member extending into said booster charge and terminating within said layer of cast explosive contiguous to said TNT for support of a blasting cap as said primary initiator.
Claim 11
Dependent Claim
87 words
In a booster assembly for a main explosive, wherein the booster charge is formed from TNT together with RDX and/or PETN, the improvement comprising as said booster charge a cylindrical layer of a cast explosive selected from the group consisting of pentolites, cyclotols and mixtures thereof, and acylindrical layer of cast TNT; and said cylindrical layers disposed contiguous with the other in abutted end-to-end relationship, said booster charge thereby requiring less RDX and/or PETN than required in conventional cyclotol and pentolite type booster charges of comparable performance.
Claim 12
Dependent Claim
149 words
In a booster assembly of claim 12, means for support of a primary initiator for said booster charge within said layer of cast explosive contiguous to said TNT; said pentolite containing PETN in a weight ratio to TNT of from about 60/40 to 40/60 and said cyclotol containing RDX in a weight ratio to TNT of from about 75/25 to 50/50; and an insert member within said charge, containing from 0.1 to 3 grams of an explosive of the group of PETN, tetryl and RDX and disposed, at least in part, within said layer of cast explosive contiguous to said TNT for detonation in response to action of a primary initiator when supported as described. 14 A booster assembly of claim 13 wherein said explosive contained in said insert member is PETN, and a cylindrical layer of cast pentolite in said end-to-end relationship with said cylindrical layer of TNT.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |