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 buffer.
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 firer.
Wooden wheels with steel tyre and steel nave.
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 equipment.
Armoured wagon body that can be tilted, provided of a trail that, depending on the circumstances, can receive an armoured observatory.
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).
Pure nitrocellulose powder made in France.
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.
The execution 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