US3896731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive initiator device
Assignee: United States Department of the Navy
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Filing: 1970-09-22
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Granted: 1975-07-29
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Expires: 1990-09-22
Abstract
Abstract A device for simultaneously transferring a single explosive detonation from an initial detonation point to a plurality of detonation points. The device comprises four circular plates arranged in a stacked configuration with each plate including an arrangement of intersecting slots in which lengths of heat resistant mild detonating cord are positioned terminating in explosive booster ends. The explosive booster end of each detonating cord is positioned superjacently to the point of intersection of an arrangement of slots in a subjacent plate. In a preferred embodiment, the uppermost plate has four explosive terminations, the plate subjacent thereto sixteen, the next subjacent plate fifty-two with the lowermost plate having fiftytwo explosive charges.
Inventors
- 👤 Earl E Kilmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:46
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/0838; F42C19/0846; F42D; F42D1/00; F42D1/04; Y; Y10; Y10S; Y10S102/00; Y10S102/701
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
261 words
An explosive initiating device comprising: a plurality of contacting, superjacently stacked plate members; a plurality of arrangements of commonly joined mutually perpendicular mild detonating cords positioned within slots in said members, said arrangements disposed in progressively increasing numbers on all but the lowermost one of said superjacent plate members, each of said detonating cords having a first explosive charge and a base charge connected to opposite ends thereof, each of said first explosive charges being disposed at a juncture of each said arrangements formed by said commonly joined detonating cords and each of said base charges being disposed in a through bore formed in all but said lowermost one of said plate members, each of said junctures of each of said detonating cord arrangements on all but the uppermost and lowermost ones of said plate members being located subjacent of the respective ones of said base charges of a superjacent one of said plate members; and a plurality of second explosive charges disposed on equidistantly spaced through bores formed in said lowermost plate member, the majority of said through bores in said lowermost plate being positioned immediately subjacent of the base charges of a superjacent one of said plate members; wherein the overall length of the respective paths from a point of initiation on the uppermost one of said plate members to each of said second explosive charges is equal, thereby affording a simultaneous initiation of said second explosive charges in said lowermost plate member in response to the initiation of the intersecting mild detonating cord of said uppermost plate member.
Claim 2
Dependent Claim
261 words
An explosive initiating device comprising: a plurality of contacting, superjacently stacked plate members; a plurality of arrangements of commonly joined mutually perpendicular mild detonating cords positioned within slots in said members, said arrangements disposed in progressively increasing numbers on all but the lowermost one of said superjacent plate members, each of said detonating cords having a first explosive charge and a base charge connected to opposite ends thereof, each of said first explosive charges being disposed at a juncture of each said arrangements formed by said commonly joined detonating cords and each of said base charges being disposed in a through bore formed in all but said lowermost one of said plate members, each of said junctures of each of said detonating cord arrangements on all but the uppermost and lowermost ones of said plate members being located subjacent of the respective ones of said base charges of a superjacent one of said plate members; and a plurality of second explosive charges disposed on equidistantly spaced through bores formed in said lowermost plate member, the majority of said through bores in said lowermost plate being positioned immediately subjacent of the base charges of a superjacent one of said plate members; wherein the overall length of the respective paths from a point of initiation on the uppermost one of said plate members to each of said second explosive charges is equal, thereby affording a simultaneous initiation of said second explosive charges in said lowermost plate member in response to the initiation of the intersecting mild detonating cord of said uppermost plate member.
Claim 3
Dependent Claim
23 words
A device as recited in claim 1 wherein said base charge and said first and second explosive charges comprise heat resistant explosive materials.
Claim 4
Dependent Claim
67 words
A device as recited in claim 2 wherein said base charge is connected to the end of said detonating cord by an end coupler comprising: an elongated housing; said housing having a frusto-conical recess formed in one end thereof; said housing having an axial bore formed in the other end thereof and intersecting said frusto-conical recess; and said frusto-conical recess being filled with hexanitrostilbene (Grade 1) explosive.
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) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |