Patent GB-191507015-A (GB)
Title: Improvements in or relating to the Sighting Apparatus of High Angle Guns.
IPC: F41G1/393
Filed: 1915-05-10
Abstract: 7015. Vickers, Ltd., and Backham, G.T. May 10. Sights and methods of f sighting.-Relates to cross-connected sighting-apparatus for highangle or anti-aircraft guns, of the kind in which only the lateral deflexion movements of the elevating number's sight are transmitted to the training number's sight, and comprises an arrangement in which the lateral deflexion movement of the elevating number's sight, is of a compound nature, i.e., takes place about more than one axis. The invention has particular reference to sighting-apparatus such as is described in Specification 2129/10, in which the sight receives a combined movement from several different sources. The elevating number's sight comprises (1) an " arm " A universally pivoted to a slide A' adjustable, according to the range, in a vertical guide A<2> on the gun carriage, (2) a " carrier " B' pivoted at b on a bracket extension AX of the arm A and laterally adjustable in relation thereto by means of a milled head B<2> actuating a screw and nut b<X> connecting the two members, (3) a sight " bar " B pivoted at b' to the carrier B<1> and vertically adjustable in relation thereto by means of a milled head B<3>, also controlling a screw-and-nut connexion. Thus, the carrier B' can be moved about the vertical pivot b for spotting in the horizontal plane, while the sight-arm B can be moved about the horizontal pivot b<1> for spotting in a vertical plane. The right-hand or training number's sight is adapted for lateral movements only in relation to the gun, and comprises (1) an " arm " C mounted on a vertical pivot C<1> carried by a bracket C<2> on the gun, (2) a " carrier " D<1> located beneath the arm C and pivoted thereto at d<1>, and (3) a sight. " bar " D supported on the carrier D' by means of a pin D<1x> secured in a socket D<xx> at the forward end of the carrier. In order that only the deflexion movements of the elevating number's sight shall be transmitted to the training number's sight, the members are cross-connected by rods E, F slidable in a bracket E' and having, at the elevating number's side, horizontal slides E<2>, F<2> connected to corresponding vertical slides E<4>, F<4> on the sight member by means of intermediate blocks or members E<3>, F<3> having slideways at right-angles. By this means, movements in a vertical plane of the elevating number's sight can be effected independently of the training number's sight, whilst lateral movements are transmitted thereto. Means are provided for adjusting the elevating number's sight at the pivotal point of support g, for the course and speed of the target. This means comprises a member g<x> supporting the pivot pin g and slidable in a radial slot in an arm G angularly adjustable about a vertical axis by means of a shaft g<1> for course of target, the member g<x> being radially adjustable in the slot by means of a hand-wheel G<1> for speed of target. A modification is described in which the training number's sightarm C is omitted, the sight-carrier D' being supported entirely by the transverse rods E, F instead.