Patent GB-578657-A (GB)
Title: Improvements in gun mountings
IPC: F41A27/24
Filed: 1943-04-19
Abstract: 578,657. Gun mountings. ROSE, A. G., NICHOLLS, K. H., and ROSE BROS. (GAINSBOROUGH), Ltd. April 19, 1943, No. 6279. [Classes 92 (i) and 92 (ii)] The pivotal movement of a gun or gun assembly about its training or elevating axis is effected by power-actuated means under the influence of a pivoted member which is mechanically connected to a sighting arm, the pivoted member being adapted to operate means which move with the gun and which control the power - actuated means in such manner that the gun follows the movements of the pivoted member, and the sighting arm being mounted about an axis parallel to that of the gun and'being so connected to the pivoted member that the latter follows its movements. In the construction shown two. guns 61 are attached at 62 to recoil frames 63 which are secured to brackets 64 extending from an elevating member 66 rotatably mounted on a support 67. An elevating oil motor 71 is mounted on member 66 and is formed with a gear which meshes with an arcuate rack 68 on the support 67. The lower portion 82 of the support constitutes the outer portion of a training oil motor the inner portion of which is secured to a base 83 attached to a pillar 122. A shorter pillar 124 having its axis parallel to pillar 122 is fitted with the gunner's seat 126, and has pivotally mounted on it a frame 127 having an upwardly extending forked portion 128 terminating'in bearings 129. These bearings have a common axis parallel to the elevating axis of the guns and carry a sighting arm 131 fitted with a sight 132 and handle 133, the latter carrying a firing button 134. The sighting arm has an extension 135 carrying links 137 the lower ends of which are connected to a forked member 139 pivoted to a bracket on frame 127. The forked member engages with a groove of a double-grooved member 144 slidably mounted on the pillar 124, the second groove being engaged by a second forked member 146 pivoted on a bracket extending from the base of the pillar. A similar arrangement of forked members and double-grooved members is provided as shown adjacent the base of the gun support, and interconnecting links 151 are provided to communicate the motions of one to the other. Thus, when the'sight is moved in elevation a corresponding movement is imparted to a pivoted forked member 158 extending from a frame 162 freely mounted on the pillar 122. The movement of member 158 is transmitted by 'links 112 and a frame 107, pivoted about bearings 108 coincident with the training axis of the guns, to the valve 73 of the elevating motor and the latter elevates the guns to the required angle. The frames 162 and 127 are connected respectively to arms 166, 165 which are interconnected by links 164, and the frame 162 has a further arm 167 connected by a link to the operating arm 169 of the training valve 104 attached to the lower portion of the training motor. Thus when the sight is moved in training a corresponding movement is imparted to frame 162 and hence the training motor is actuated to train the guns in the required direction. Specifications 576,621 and 577,922, [Group XXIX], are referred to.