Patent GB-190715112-A (GB)
Title: Improvements in Fluid Pressure Brakes for Barrel Recoil Ordnance.
Filed: 1907-07-01
Granted: 1908-04-23
Abstract: 15,112. Krupp Akt.-Ges., F. Oct. 12, 1906, [date applied for under Patents Act, 1901]. Mountings; field carriages.-Relates to barrelrecoil guns of the type in which a portion of the fluid-pressure brake is adjustable for controlling the length of recoil, and consists in the provision of two separate and independent appliances for adjusting the brake, one acting automatically and the other by band. The slide carrier B, Fig. 1, receives the fluid-pressure brake E, F and the running-out spring L. The cylinder E is rigidly connected to the spur a', and the piston-rod F is rotatably mounted in the cover b<2>. The piston consists of a part F<1> rigidly connected to the piston-rod, and a rotary valve G having a lug to engage a cam-groove e<1> in the cylinder wall, passages f<2>, g<1> being provided in the two parts respectively. The passages may be adjusted relatively to each other, by rotating the piston-rod F, to vary the travel of the cylinder E during recoil. In order to make the adjustment automatically as the gun is elevated, a spur-wheel F<3> fixed to the piston-rod gears with a detachable sector J on a shaft H, Fig. 2, which also has an arm K connected by ball-and-socket joints and a rod M<4> to a fixed bolt N substantially as set out in Specification No. 6587, A.D. 1907, so that, as the gun is elevated, the point k<1> travels over the are X X, Fig. 1, the shaft H, and consequently the piston-rod, is rotated, and the passages f<2>, g<1> are relatively adjusted. If it is required to adjust the passages by hand, the detachable sector J is placed on a shaft P to which rotation is imparted by means of bevel-wheel sectors Q, R, Fig. 6, and a hand-lever R<1> working in conjunction with notched sectors T, substantially as set out in Specification No. 5289, A.D. 1907. In a modification, the shaft P is replaced by a fixed pin adapted to receive the detachable sector J. Marks on the spurwheel corresponding to various lengths of recoil are brought into line with a mark on the sector by rotating the piston-rod by means of a squared portion thereon and a key. The sector and wheel are then placed in gear to retain the piston-rod in position. In a second modification, shown in Fig. 10, a cap V is fixed to the pistonrod and acts as a shield for a bolt W, and has a squared portion v<3> by means of which the piston-rod is rotated. The bolt W is free to rotate and also to move longitudinally, and has a projection w<1> which engages a notch b<8> in the cover b<2>, and one of three notches v' in a collar on the nut V. When the recoil adjustment is to be made by hand, the sector J is disengaged from the wheel F<3>, the bolt W is drawn outwards, the piston-rod is rotated until the required notch v<4> is in line with the notch b<8>, and the projection w<1> on the bolt is then allowed to re-engage the notches to lock the parts in position. The invention may be applied to guns provided with a counter-rod projecting into a hollow pistonrod, or into some other portion of the brake. Specification No. 3087, A.D. 1906, is also referred to.