公开(公告)号：GB1098118A

公开(公告)日：1968-01-03

申请号：GB1497766

申请日：1966-04-04

Applicant: NORRIS INDUSTRIES

Inventor： CHOATE PAUL VINCENT ,  CARR ALTON FRANK

IPC: F41G1/00 ,  F41G1/08 ,  F41G3/08

Abstract: 1,098,118. Sights for weapons. NORRISINDUSTRIES Inc. April 4, 1966, No. 14977/66. Heading F3C. A sight for a weapon comprises a mount 14 and a sighting unit housed within the mount and including a vertically movable sight member 22 to which one end of a thermally responsive means 24 is connected. The other end of the thermally responsive means 24 is connected to the mount and is made of such a material, e.g. bi-metallic strip, that in the case of a back sight, the sighting member is lowered in the mount for a decrease in temperature and raised for an increase in temperature. The sight is for a weapon firing rocket having solid fuel propellent, the efficiency of the propellant depending upon its initial firing temperature. Hence as the propellant temperature increases the trajectory of the associated projectile becomes lower, the sight compensating for this energy variation (Fig. 1, not shown). The thermally responsive means may comprise a helix formed from helically wound bi-metallic strip, a spiral bi-metallic strip (Fig. 6, not shown) on a U-shaped bi-metallic strip one end of which is connected to the mount and the other end carrying a forked member, a pin, joining the free end of the forked member, working in a diagonal slot in the sight member (Fig. 7, not shown). The sight member 22 is provided with a peep aperture 23 viewed through windows 21 in the mount. The thermally responsive means 24 is a free fit within a sleeve 26 of heat reflecting material such as aluminium.