Sights

In this system, employed when the target is invisible, specially constructed sights (used in the ordinary sight-slots) are provided, having cro -bars on their heads, divided into scales of equal parts, and parallel tc the axis of the trunnions. re. — In the French service, the proce of constructing a built-up gun. … ytms; System of Fortification. — A system in which the maximum of the angles to of the the curtain, bastions and is fixed at 90°. The flanks are perpendicular the whole enceinte is surrounded by a fau e-braie on a level with the ground. … itftoa Chocks. — Brakes attached to the common standing garrison-carriages of guns, so as to raise the trucks or wheels off the platform, when the gun begins to recoil, to prevent its running back. … Cones. — A kind of coupling in which motion is communicated by the friction of the surface of a cone fixed on one shaft against the inner surface of a similar cone, into which it may be thrust, fixed on another shaft. tion friction.Fused — A fuse which is ignited by the heat involved by tion Plate. — A plate of iron placed on the side of the trial be am of wooden gun-carriages at that point Ytetfe … locks with the carriage. Friction plates are also used to check the recoil of guns.