GUNNERY TRAINING AIDS HAVING PROJECTORS WITH LIGHT BEAM DEFLECTION MEANS

摘要

1522831 Target projection system RFD SYSTEMS ENG Ltd 29 Oct 1975 [24 June 1975] 26784/75 Heading G2J [Also in Division F3] A gunnery training aid comprises a cinematographic projection system for projecting a target on to a screen, the film being stopped when a "shot" is fired and the angle of the beam from the projector being altered from a datum direction so as to compensate for the trajectory drop over the range, the angle change being release of arm 13 such that the arm falls under gravity to contact a cam 15 thereby allowing mirror 10 to tilt about axis X. The cam is adjustable to select the "range" (and hence the degree of deviation from the datum). Upon reactivation the arm 13 is raised again to the position corresponding to datum. As described the arm 13 is held in the datum position by the spring urged plunger of a solenoid, activation of the solenoid serving to withdraw the plunger against the spring action. The screen may be as described in Specification 1522832.