Schneider-Canet 120mm long gun M. 1897
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The
Schneider-Canet 120mm L/28 gun was built throughout of steel, and it was formed of a tube which run the
whole of its length, the breech-block fitting in the rear end of the tube. It
was strengthened by a jacket, a trunnion-ring and a wedge coil. The jacket
was fitted with a coil, on which were joined the elevating bars. The
breech-block was of the ordinary threaded type, with a plastic obturator of
the Schneider-Canet system. The fire was effected with a friction fuze. The
breech was opened in three actions of the breech-block. The carriage
consisted of two brackets built up of steel plates; they were held apart by
top and bottom stay-plates, a stay-bolt, and a head-plate fitted with the
angle bar which formed the chase rest. The two brackets were joined together
at the trail end by a cast steel piece held by a trail-plate. The brackets
carried the gun trunnions, the support for the elevating mechanism, and the
various accessories required for working the gun. The bottom trail-plate
carried the socket which held the recoil piston rod. The hydraulic recoil
cylinder was on the Schneider-Canet system, with central counter-rod and
constant resistance. The carriage rested on
a steel axle, with the interposition of an axle body of hard wood. A
shoe-brake acted on the wheels in the ordinary manner when the gun was
wheeled about. The elevating mechanism contained a toothed sector, joined by two bars
to the coil on the jacket; it geared with a pinion keyed on a horizontal
shaft, worked direct by the elevating handwheel. The platform on which the carriage rested was formed of oak beams,
placed in the ground. A bolster bolted on the platform carried the pivot
round which the jointed axle of the recoil cylinder turned. It was also
provided with a frame, to which the brake shoes were fitted. The trail end was fitted with the accessories for hooking it in the
limber. When the gun was transported on its carriage, it was placed in
special rests on the trail. The recoil-cylinder was mounted on a special car,
the carriage being wheeled together with the limber. For the
improvements introduced in 1907, see Siege and fortress
artillery. SOURCE : DREDGE. James: The Works of Messrs. Schneider and Co.
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