GB1386823A - Shock absorbing device for firearms - Google Patents

Abstract

1386823 Recoil modifying INTERNATIONAL VIBRATION ENG and AVIONS MARCEL DASSAULT 28 Feb 1972 [1 March 1971] 9042/72 Heading F3C [Also in Division F2] A resilient assembly such as a series of biconical rings 6, Fig. 1, or of annular cushions 14 of knitted steel thread, Fig. 5, and a friction assembly (wedge-shaped segments 8 with friction linings 9, and a wedge ring 7) are mounted between a movable member (sleeve) 1 and a support (tubular casing) 2 to absorb the energy of recoil F imparted to the member 1, e.g. by an aircraft cannon mounted therein, and to return the member after recoil, an element (segment 8) of the friction assembly being moved from an advanced position (as shown), with the member 1, during recoil, to a position in which it engages an abutment 10 secured to the support 2 so that there is a relative movement and friction between the element and the member 1 during further recoil movement, a complementary element (ring 7) being biased against the friction element 8, during recoil, by a resilient assembly (Belleville washers 12 or 18, or annular cushions similar to those 14, Fig. 5, which are outside the casing 2). The sleeve 1 slides on guides 3, 4 in the casing 2. To allow limited axial movement of the segments 8, they are hooked on to the abutment, a flange 10 of an end ring 5 of the casing 2 around the sleeve 1. They are biased by a weak spring 11, in the direction of the recoil F, i.e. toward the wedge ring 7. In both Figs. 1 and 5, the recoil F of the cannon or other weapon is first borne by the spring 6 or 14 by way of the sleeve 1 and then the latter, because of the friction linings 9, urges the wedge ring 7 by way of the segments 8 to compress the spring 12 or 18. In Fig. 1, an abutment 13 fixed to the sleeve 1 allows the spring 12 to expand, with continuing recoil of the sleeve, and permit sliding of the ring 7 and thus lessen the frictional force of the linings 9 on the sleeve. The spring 6 returns the sleeve 1 to the position shown and this movement is cushioned by the spring 12. In Fig. 5 the compression of the spring 18 is limited and so there is not the lessening of the frictional force during recoil as in Fig. 1 due to extended movement of the wedge ring 7. A fixture 17 in the casing 2 acts as an abutment for the spring 18 and a spring 15 of members like the cushions 14 acts to cushion the return of the sleeve 1 after recoil.