US3645207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustible moistureproof percussion primer
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1969-05-06
•
Granted: 1972-02-29
•
Expires: 1989-05-06
Abstract
Abstract A percussion primer for initiating firing of a cartridge which is fully combustible and which is impervious to moisture vapor. The primer mix is contained in a consumable moistureproof sealed cup-shaped closed member received in a molded propellant support and backed against a molded propellant anvil which function together as a unit attachable to a cartridge.
Inventors
- 👤 Edward S Daniels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:58
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/085; Y; Y10; Y10S; Y10S102/00; Y10S102/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
178 words
A percussion primer assembly comprising: a support member, a bore through said support member, said bore having a reduceddiameter end, a cup-shaped housing member having an open end with an out-turned flange therearound, said housing member received in the said reduced diameter end of the said support member bore with the said flange received in the said nonreduced diameter portion of the said bore bottoming against the reduced diameter portion, a closure member in said nonreduced diameter portion overlying said flanged end closing said housing, said housing containing an explosive primer mix, an anvil member received in said nonreduced diameter portion of said bore closing said bore at one end thereof and entrapping said closure member and housing therein, said support member and said anvil member constructed of a combustible propellant, said housing and said closure plate constructed of a material impervious to moisture whereby the said primer mix is sealed against moisture in said housing, and said housing and said closure plate constructed of a consumable material whereby the entirety of the assembly is destroyed during firing.
Claim 2
Dependent Claim
178 words
A percussion primer assembly comprising: a support member, a bore through said support member, said bore having a reduceddiameter end, a cup-shaped housing member having an open end with an out-turned flange therearound, said housing member received in the said reduced diameter end of the said support member bore with the said flange received in the said nonreduced diameter portion of the said bore bottoming against the reduced diameter portion, a closure member in said nonreduced diameter portion overlying said flanged end closing said housing, said housing containing an explosive primer mix, an anvil member received in said nonreduced diameter portion of said bore closing said bore at one end thereof and entrapping said closure member and housing therein, said support member and said anvil member constructed of a combustible propellant, said housing and said closure plate constructed of a material impervious to moisture whereby the said primer mix is sealed against moisture in said housing, and said housing and said closure plate constructed of a consumable material whereby the entirety of the assembly is destroyed during firing.
Claim 3
Dependent Claim
23 words
The assembly of claim 1 wherein the said housing and the said closure plate are constructed of a combustible material impervious to moisture.
Claim 4
Dependent Claim
21 words
The assembly of claim 1 wherein the said housing and said closure means are constructed of a low melting point metal.
Claim 5
Dependent Claim
19 words
The assembly of claim 1 wherein the said housing and said closure means are constructed of a nitrate ester.
Claim 6
Dependent Claim
93 words
The assembly of claim 1 wherein the entire assembly is disc-shaped having a top and bottom axial end, said bore lying generally along the axis of said disc, said reduced diameter portion open to said top end, the nonreduced diameter portion open to said bottom end, the bottom wall of said cup-shaped housing terminating in a plane substantially equal to the plane of the said top end, said anvil terminating in a plane substantially equal to the plane of said bottom end, said housing, said closure and said anvil substantially filling said bore.
References Cited (Backward Citations)
US740790A
Cited
US1353118A
Cited
US3169483A
Cited
US3236181A
Cited
US3320887A
Cited
US3336871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |