Ammunition and explosives – Igniting devices and systems – Multiple mode fuzes
Patent
1987-03-12
1988-04-26
Brown, David H.
Ammunition and explosives
Igniting devices and systems
Multiple mode fuzes
102251, 102255, 102268, F46C 902, F46C 914, F46C 1524
Patent
active
047397063
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The object of the invention is to provide a fuse projectile with a detonator and a weapon safety comprising a body covered with a cap, a firing pin acting upon a firing cap during impact, an arming mechanism comprising a movable part arranged to assume first a safety position in which the cooperation between the firing pin and the firing cap is not possible and then an armed position allowing this cooperation, a mechanical timing element with an escapement for adjusting the duration of time of the movable part in the armed position, this timer meshing with a toothed part of the movable part to vary the duration of the time that it takes for the fuse to pass from the safety position to the armed position.
A fused of this kind is already known by the U.S. Pat. No. 2,644,398 in which the means for varying the time it takes for the fuse to pass from the safety position to the armed position has a differential gear mechanism for the purpose of varying the initial position of a movable part which must be brought into the final arming position. This mechanism is complicated and expensive.
SUMMARY OF THE INVENTION
The present invention has the purpose of creating a rugged, simple and inexpensive device, for permitting the adjustment of the passage time of the movable part from an initial safety position to a final arming position.
For this purpose the fuse of the object invention is characterized in that the timer is made to be adjustable in order to change its position along a toothed part for the purpose of modifying the distance over which it will mesh with the toothed part before the movable part will reach its armed position.
BRIEF DESCRIPTION OF THE DRAWINGS
The attached drawing represents schematically and as an example a form of implementation of the object fuse of the present invention.
FIG. 1 is a axial section of the fuse of the present invention.
FIG. 2 is a section following a line II--II of FIG. 1.
FIG. 3 is a partial section along a line III--III of FIG. 1.
FIG. 4 is a cross section following a line IV--IV of FIG. 1.
FIG. 5 is a partial view of FIG. 2, showing a different operating position.
FIGS. 6 and 7 illustrate the control device.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION
The fuse comprises a body 1 on which is mounted a cap 2 which can be displaced angularly with respect to the body 1 by a ring 3 which has a cam form provided with two ring gaskets 4 and 5 and whose operation will be described later.
The front part of the cap 2 carries a firing pin 6 which is urged towards a caplet 7 by a spring 8 and which is provided with a firing cap 10 carried by a rotor 12, the latter is represented on FIG. 1 in the safety position in which the firing cap 10 is placed outside the trajectory of the tip 9 of the firing pin 6. The rotor 12 is an integral part of a shaft 13 pivoting in bearings 14 carried by the body 1. The end of the shaft 13 is provided with a flat piece 15 facing a flange 16 of the ring 3 when the ring 3 is in the safety position produced by the angular position of the cap 2.
The angular displacement of the rotor 12 permitting the firing cap 10 to be brought into the operating position is controlled by a device shown clearly on FIGS. 3 and 4.
This device comprises an inertial lever 17 mounted on one of the bearings 14. This inertial lever 17 has its center of gravity eccentric with respect to the axis of the shaft 13 and is maintained in its safety position shown in FIGS. 3 and 4 by a lock 18 placed in a slot 19 of this lever as well as in another slot 20 on rotor 12. The lock 18 is retracted by a spring 21 towards the interior of the projectile, but it is maintained in its position by a flange 16 of the ring 3 when the latter is in the safety position. Furthermore, the lever 17 is subjected to the action of a pushing finger 22 urged by a spring 23, applying the finger 22 against a recess 24 formed in the lever 17.
A torsion spring 25, wound on the shaft 13 of the rotor 12 is attached, by one of its ends, to the lever 17 and by the
REFERENCES:
patent: 2644398 (1953-07-01), Rabinow
patent: 2709962 (1955-06-01), Funk et al.
patent: 2762304 (1956-09-01), King et al.
patent: 2763213 (1956-09-01), Rueger
patent: 3530796 (1970-09-01), Kaiser et al.
patent: 4154169 (1979-05-01), Petiteau
patent: 4215635 (1980-08-01), Farace
patent: 4389937 (1983-06-01), Golay et al.
patent: 4464991 (1984-08-01), Kaiser
Brown David H.
Mefina S.A.
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