Schneider-Canet 75mm field gun type PR
Gun-body in hardened steel and
hooped housing to the muzzle composed by a tube and two jackets assembled by
a screwed hoop.
Breech with eccentric screw mechanism, interrupted
threads, opening with an uninterrupted single action of the hand-lever.
Repeat firing device with hammer and safety
arrangement against premature fire and prolonged fires.
Covering tubes of the cylinders of the
buffer and the recuperator, assembled to the gun, and recoiling with it. They can be easily dismantled.
Hydraulic buffer containing the check
Spring recuperator divided in two columns
lodged into two covering tubes.
Cradle of stamped steel sheet of the same kind of
the shield carrying the bronzed recoil slides.
Elevating gear fitted for an
independent line of sight with range dial device on the right, and
sitogoniometer (goniometric angle of site measurer) on the left.
Goniometric sighting gear with optical
sight. Prismatic device for back aiming.
Carriage of stamped steel sheet.
Traversing on axletree bed.
Trail spade composed by a fixed ploughshare in forged
steel and a folding part in steel sheet.
Firing seats for the aimer and the
Wooden wheels with steel tyre and
Gun-shield made by steel sheet of
the French artillery type
Gun and wagon limber of the same kind, with
chests for the ammunition and knapsack-rack with grid to carry the cannoners
Armoured wagon body that can be tilted,
provided of a trail that, depending on the circumstances, can receive an
Fixed ammunition lodged in the sockets.
Shrapnel with charge at the bottom
equipped with time and percussion fuze.
Thin-walled high explosive shell equipped with
percussion fuze and loaded with high explosive (Schneiderite).
nitrocellulose powder made in
Mechanical fuze-setter for time and percussion
fuzes lodged in the shrapnel ammunition wagons.
II. General properties
The power is obtained by means of
a projectile weighting
The mobility is very satisfactory due not
only to the moderate weight of wagons and carriages, but also to their
balancig and good states of their drawing.
The steadiness on firing is complete. The
accurate setting of the return cylinder buffer and of the check buffer
suppressed at the same time the recoil, the rising, and the tendency to
throwing during the retun in firing position. The traversing gear shifting on
the axletree bed suppressed the entire systemic component which tends to
deregulate the traversing.
The complete return in firing position is assured
under angles greatly superior to those enabled by the carriage. The action of
the check buffer assures a return in firing position regular and without
shock. The division of the spring in two columns, both composed by many
elements, makes unimportant the breaking of a spring; the breaking of a
spring is greatly reduced by the weak rate where their metal works.
The ranging fire and the progressive fire with time fuze are made widely easier by the adoption
of the independent line of sight.
of the indirect fire is as simple
as the direct fire, owing to the combined arrangements of the aiming,
sighting, and observation devices.
The safety on fire is complete; the
eccentricity of the breech and the mechanical safety-piece of the firing gear
prevent any trouble.
The protection of the cannoners is
perfectly assured thanks to the gun-shield and to the tilted armoured wagon,
placed side by side next to the gun.
The rapidity of fire can reach a rate of
25 – 30 rounds per minute with progressive and sweeping fire with time fuze,
thanks to the easiness of the breech action, the independence of the loading
and of the aiming operations, to the use of the fuze-setter, and good layout
of the artillery matériel as a whole.
III. Numerical references and data
This is the translation
of an advertisement of the French firm Schneider-Canet published in 1908
(SCHNEIDER & CIE. Matériel
de campagne ŕ tir rapide de