Patent GB-190914726-A (GB)
Title: Apparatus for Regulating the Running-out Velocity in Differential Recoil Guns.
Inventor: HAUSSNER KONRAD
IPC: F41A25/14
Filed: 1909-06-23
Granted: 1909-12-31
Abstract: 14,726. Haussner, K. June 23. Field carriages; recoil apparatus.-Relates to differential-recoil guns, and consists in the following arrangements whereby the run-out velocity at the time of firing may be varied so that the gun will always recoil to the loading position for all angles of elevation and depression when different powder charges are used or when blank cartridges are fired: (1) the lever on the cradle, with which the trigger-lever on the gun-breech engages during run-out, has its position adjusted automatically, by rand, or by an inertia device ; (2) the distance over which the run-out gear accelerates the barrel may be varied either automatically or by hand. Fig. 1 shows the trigger-operating two-armed lever h, h<1>, pivoted at h<2> to an arm J attached to the gun cradle, and having one arm h' which engages with a groove i arranged in the gun carriage and eccentric with the trunnion axis, and the other arm h engaging during run-out with a trigger G on the breech of the gun. As the gun is elevated through the medium of a pinion M and rack 0, the arm h is moved away from the trigger G so that an extra distance s<1> has to be traversed by the barrel before firing occurs, and consequently a greater run-out velocity is attained. When the gun is depressed, the lever h, h<1> is moved nearer to the trigger G by the groove i. Fig. 3 shows an arrangement in which, through gearing p, p<1>, the position of the lever h is varied automatically as the sights Q are elevated and depressed. The sights may also be carried on the gun, and the position of the trigger G is then made adjustable in accordance with the elevation put on the sight, the lever h being in this case fixed in position. Fig. 13 shows an arrangement in which the position of one arm d of a trigger operating lever d, d' may be varied automatically as the gun is elevated, by weighting the other arm d'. If a further correction for different powder charges or for blank cartridges is required in this case, the pivot c of the lever d, d' may be moved in a guide towards or away from the trigger G. Fig. 4 shows one construction, in which the lever h is fixed to the cradle and in which the distance over which the run-out spring acts to accelerate the barrel is varied by adjusting a bush P, which serves to prevent forward movement of the abutment c of the run-out spring C, but which is recessed to allow a collar f on the spring support F to move forwards without hindrance until the trigger-lever G is operated. The bush P may be adjusted automatically, as the gun is elevated, by teeth p<1> through the medium of a spur-wheel Q and a flexible shaft S rotated by bevel-gearing W connected to the elevating-pinion M. Fig. 7 shows a similar arrangement, in which the rear abutment e of the run-out spring may be operated upon by an adjustable piece P on the support F in order to crause the pressure of the spring to be taken off the barrel when the required run-out velocity has been attained. The arrangements shown in Figs. 4 and 7 may in some cases be combined. Fig. 9 shows an arrangement in which an india-rubber bar C, forming the run-out gear and stretched between the barrel projection a<1> and the abutment E on the cradle, accelerates the barrel over a distance s, which can be varied by operating a handle L so as to adjust a stop J, which allows of the passage of the barrel projection a<1> in the forward direction, but which prevents further contraction of the india-rubber bar C. In the arrangement shown in Fig. 11, the run out gear is pneumatic, and the distance over which the barrel is accelerated is varied by adjusting a bush E, which serves to arrest the piston-rod D while the barrel A moves forward, owing to its projection a<1> being loosely mounted on the rod D, until the trigger G is operated by the lever h.