US3090308A - Electric primers for projectiles - Google Patents
Electric primers for projectiles Download PDFInfo
- Publication number
- US3090308A US3090308A US64466A US6446660A US3090308A US 3090308 A US3090308 A US 3090308A US 64466 A US64466 A US 64466A US 6446660 A US6446660 A US 6446660A US 3090308 A US3090308 A US 3090308A
- Authority
- US
- United States
- Prior art keywords
- electrode
- electrodes
- insulating
- base
- orifice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/12—Primers; Detonators electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/12—Bridge initiators
- F42B3/124—Bridge initiators characterised by the configuration or material of the bridge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B3/00—Blasting cartridges, i.e. case and explosive
- F42B3/10—Initiators therefor
- F42B3/14—Spark initiators
Definitions
- Electric primers for projectiles are already known, comprising two electrodes connected one to the other by a conducting bridge or layer disposed on an insulating support.
- the present invention has for its object to remedy this disadvantage. It has for its object an electric primer of the type referred to, characterised in that the conducting bridge is covered with a protective layer on its face opposite that which contacts the insulating support.
- This primer is constituted by a metal part 1 of cylindrical shape, having a central hole 2 and an axial projecting finger or stud 3.
- This part 1 is located in a metallic sleeve 4 with the interposition of an insulating ring 5 ensuring its centering relatively to this sleeve.
- An insulating mass 6 fills the free space between the part 1 and the sleeve 4 and on its upper face carries a thin layer 7 of metal, deposited in colloidal form, constituting a conducting bridge.
- the part 9 constitutes a shell which surrounds the sleeve 4, and also the part 8'.
- This latter is of cylindrical shape and comprises a base 10 having an orifice 11 located opposite the finger 3. The edge of this orifice 11 is in electrical contact with the conducting bridge.
- the second electrode has a portion in the general shape *of a pot which surrounds the first electrode 1 with the interposition of an insulating substance.
- the wall of this pot is constituted by the sleeve 4 and the bottom of this by the base 10 of the part 8. This latter defines a chamber adapted to contain a detonating charge 13.
- the active part of the conducting bridge which is located opposite the orifice 11, is covered by a protective layer 12 on its face opposite that which touches the insulating mass 6.
- this layer 12 is electrically insulating. It may, for example, be constituted by a varnish, by paper or even by fabric, particularly a silk fabric. In .this manner, the ignition of the primer can only be obtained when the spark between the finger 3 and the conducting bridge, has suflicient energy for destroying the protective layer 12.
- An electric primer for a projectile comprising in combination, first and second electrodes, the first electrode comprising a metallic member of generally cylindrical shape having a centrally disposed opening at one end and a stud projecting from its opposite end, the second electrode comprising a metallic shell, a pair of metallic sleeves within said shell and disposed one above the other, each of said sleeves in contact with said shell, the uppermost sleeve containing a detonating charge and having an opening in its bottom wall opposite the stud of said first electrode, the lowermost sleeve enclosing said first electrode and insulating means therebetween, a metallic conducting bridge supported on the upper surface of said insulating means and in contact with each of said electrodes, and a layer of protective material on said conducting bridge on the face thereof opposite that Which contacts said insulating means, said protective material sealing the opening in the bottom wall of the uppermost sleeve to thereby separate the detonating charge contained in said sleeve from the stud of the first electrode and the insulating bridge.
- An electrical primer for a projectile comprising, first and second cylindrical electrodes, said second electrode including an internal sleeve provided with a base, said base having an orifice, said first electrode disposed within and spaced from said second electrode, an insulating mass between said electrodes, said sleeve of said second electrode containing an explosive charge to be ignited by a spark jumping between said electrodes, a part of said first electrode emerging from said insulating mass adjacent said orifice in said base, a single metallic deposit in colloidal form overlying said insulating mass and connecting said first and second electrodes adjacent said orifice in said base, a single protective layer of electrically insulative material disposed upon said metallic deposit opposite said orifice, said protective layer overlying said metallic deposit and being contiguous therewith, said protective layer completely isolating said explosive charge from said metallic deposit and said first electrode, whereby, a spark of suificient intensity to properly ingite said explosive charge will destroy said protective layer and contact said charge to ignite the same.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Air Bags (AREA)
- Insulating Bodies (AREA)
- Fuses (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH8000259 | 1959-10-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3090308A true US3090308A (en) | 1963-05-21 |
Family
ID=4537576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US64466A Expired - Lifetime US3090308A (en) | 1959-10-28 | 1960-10-24 | Electric primers for projectiles |
Country Status (6)
Country | Link |
---|---|
US (1) | US3090308A (ko) |
CH (1) | CH359069A (ko) |
DE (1) | DE1120942B (ko) |
GB (1) | GB963704A (ko) |
LU (1) | LU39306A1 (ko) |
NL (2) | NL122108C (ko) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3249049A (en) * | 1964-07-31 | 1966-05-03 | Zimmerman Theodore | Ballistic primer |
US3257947A (en) * | 1964-12-17 | 1966-06-28 | Ernest E Mallory | Shock focusing explosive initiator |
US3272127A (en) * | 1963-08-05 | 1966-09-13 | Robert E Betts | Igniter squib |
US4206707A (en) * | 1977-11-22 | 1980-06-10 | General Dynamics Corportation | Electromagnetic hazard suppression techniques |
WO1981000914A1 (en) * | 1979-09-28 | 1981-04-02 | Battelle Development Corp | Detecting particles |
FR2483598A2 (fr) * | 1980-05-27 | 1981-12-04 | Bofors Ab | Allumeur electrique pour munitions |
EP0162810A1 (de) * | 1984-05-21 | 1985-11-27 | Ems-Inventa AG | Verfahren zur Herstellung eines Polkörpers für eine elektrische Zündvorrichtung, ein durch das Verfahren hergestellter Polkörper und dessen Verwendung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2887054A (en) * | 1956-01-13 | 1959-05-19 | Du Pont | Blasting initiator |
US2920569A (en) * | 1953-07-17 | 1960-01-12 | Menke Joseph Ferdinand | Electrical pellet primer |
-
0
- NL NL257113D patent/NL257113A/xx unknown
- NL NL122108D patent/NL122108C/xx active
-
1959
- 1959-10-28 CH CH359069D patent/CH359069A/fr unknown
-
1960
- 1960-10-19 LU LU39306D patent/LU39306A1/xx unknown
- 1960-10-24 US US64466A patent/US3090308A/en not_active Expired - Lifetime
- 1960-10-25 DE DEB59978A patent/DE1120942B/de active Pending
- 1960-10-28 GB GB37159/60A patent/GB963704A/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2920569A (en) * | 1953-07-17 | 1960-01-12 | Menke Joseph Ferdinand | Electrical pellet primer |
US2887054A (en) * | 1956-01-13 | 1959-05-19 | Du Pont | Blasting initiator |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3272127A (en) * | 1963-08-05 | 1966-09-13 | Robert E Betts | Igniter squib |
US3249049A (en) * | 1964-07-31 | 1966-05-03 | Zimmerman Theodore | Ballistic primer |
US3257947A (en) * | 1964-12-17 | 1966-06-28 | Ernest E Mallory | Shock focusing explosive initiator |
US4206707A (en) * | 1977-11-22 | 1980-06-10 | General Dynamics Corportation | Electromagnetic hazard suppression techniques |
WO1981000914A1 (en) * | 1979-09-28 | 1981-04-02 | Battelle Development Corp | Detecting particles |
FR2483598A2 (fr) * | 1980-05-27 | 1981-12-04 | Bofors Ab | Allumeur electrique pour munitions |
EP0162810A1 (de) * | 1984-05-21 | 1985-11-27 | Ems-Inventa AG | Verfahren zur Herstellung eines Polkörpers für eine elektrische Zündvorrichtung, ein durch das Verfahren hergestellter Polkörper und dessen Verwendung |
Also Published As
Publication number | Publication date |
---|---|
NL257113A (ko) | |
GB963704A (en) | 1964-07-15 |
LU39306A1 (ko) | 1960-12-19 |
DE1120942B (de) | 1961-12-28 |
CH359069A (fr) | 1961-12-15 |
NL122108C (ko) |
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