Ammunition and explosives – Igniting devices and systems – Multiple mode fuzes
Patent
1987-03-12
1988-05-03
Brown, David H.
Ammunition and explosives
Igniting devices and systems
Multiple mode fuzes
102251, F42C 914, F42C 1524
Patent
active
047412704
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a fuse for projectiles comprising a body having a rotor carrying two firing caps, each of the firing caps having different characteristics, and cooperating with a detonator in the form of a firing pin carried by a cap covering the body, with the firing pin being displaced axially during impact of the projectile in order to strike a firing cap.
A fuse of this general type has been known. Such a fuse has been described in the French Pat. No. 1 204 450. In this known fuse, the firing caps are placed in a median plane of the fuse, but are offset angularly on the rotor. The present invention aims at obtaining the same advantages of operation but with a simpler construction and a construction which is more reliable and less expensive.
SUMMARY OF THE INVENTION
The present invention is characterized in that the two firing caps are mounted side by side, means have been provided in order to allow, at will, the firing pin to cooperate with one or the other of the firing caps; and the rotor always makes the same angular displacement in order to bring the firing caps to the active position.
BRIEF DESCRIPTION OF THE DRAWING
The attached drawings represent schematically and for sake of example, a form of execution of the fuse being the object of the invention. In the drawings:
FIG. 1 is an axial section of the fuse of the present invention.
FIG. 2 is a partial section through line II--II of FIG. 1.
FIG. 3 is a partial section through line III--III of FIG. 1.
FIG. 4 is a section through line IV--IV of FIG. 1.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
The fuse of the present invention comprises a body 1 in which is mounted a cap 2 which can be displaced angularly with respect to the body 1. The given position of cap 2 is maintained by the friction exercised by a ring 3, on the body 1 and which is an integral part of the cap 2, and which is provided with two ring joints 4 and 5.
The upper part of the cap 2 carries a firing pin 6 urged against a caplet 7 by a spring 8. The firing pin 6 is provided with a tip 9 which is eccentrically located with respect to the longitudinal axis of the fuse. The firing pin 6 is designed to cooperate with one or the other of the firing caps 10 and 11 which are carried by a rotor 12, the latter being shown at FIG. 1 in the safety position in which the two firing caps 10 and 11 are placed outside the trajectory of the tip 9 of the firing pin 6. The rotor 12 is an integral part of a shaft 13 and rotates in bearings 14 carried by the body 1. The ends of the shaft 13 each have a flat part 15 located in front of a flange 16 of the ring 3 when the ring 3 is in the safety position as produced by the angular position of the cap 2.
The angular displacement of the rotor 12 brings the firing caps 10 and 11 into operating position and is controlled by a device which is shown in FIGS. 3 and 4. This device is comprised of an inertial lever 17 pivotally mounted on one of the bearings 14. The inertial lever 17 has its center of gravity eccentric to the axis of the bearing 14 and is retained in its safety position shown in FIGS. 3 and 4 by a lock 18 engaged in a slot 19 of the lever 17, as well as in another slot 20 of the rotor 12. The lock 18 is urged in a direction outward of the projectile by a spring 21, but it is retained in its position by one of the flanges 16 of ring 3, when the latter is in the safety position. Furthermore, the lever 17 is engaged by a finger 22, which, in turn, is turn, is urged by a spring 23, against a stop 24 of the lever 17.
A torsion spring 25, wound on the shaft 13 of the rotor 12, is attached at one end to the lever 17 and at the other end to the shaft 13. The spring 25 is designed to supply the driving couple for turning the rotor 12 after the shot has been fired and to bring it into the active position, allowing the tip 9 of the firing pin 6 to strike one or the other of the firing caps 10 or 11. The rotation of the rotor 12 is timing by an escapement mechanism 26. As shown at FIG. 2
REFERENCES:
patent: 1751616 (1930-03-01), Brayton
patent: 1933608 (1933-11-01), Teitscheid
patent: 2524060 (1950-10-01), Liljegren
patent: 3352241 (1967-11-01), Combourieux
patent: 3715987 (1973-02-01), Morel et al.
patent: 4230042 (1980-10-01), Popovitch
patent: 4389937 (1983-06-01), Goloy et al.
patent: 4606271 (1986-08-01), Goloy et al.
Brown David H.
Mefina S.A.
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