CHAPTER V CARE OF THE CARTRIDGE CASE

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"As long as war is regarded as wicked it will always have its fascinations. When it is looked upon as vulgar it will cease to attract."

Wilde.

All good sportsmen know what is a cartridge, whether for gun or rifle; they know too that the nice brightly-polished little disc on the end of it contains the percussion cap by means of which the shot or bullet, as the case may be, is fired. Beyond this they do not worry. They load their gun or rifle; if the former, they are naturally pleased supposing forthwith they wing their bird, a "right and left" raises themselves in their own estimation no end of a great deal; if the latter, and they succeed in laying low the quadruped object of their strenuous quest, a haunch of venison, maybe, is their reward, their trophy a particularly fine head, a "Royal" displaying no fewer than a dozen "points." In either event, the little cartridge once having served its purpose is in due course extracted from the breech and flung unceremoniously away to be trodden with scant courtesy underfoot, carelessly consigned to oblivion.

So too in war, or at any rate during the early phases of the Great War, when questions of expense and of economy were seldom, if ever, mooted, and when, during the great retreat and the subsequently feverish advance to the Aisne heights, transport was more or less improvisatory and problematical and every moment precious, ammunition cartridge cases (turned and finished to thousandth parts of an inch and beautifully polished), no sooner having served their immediate purpose, were hastily extracted from the smoking breech of the gun and inconsequently thrown aside.

Distorted and not infrequently cracked or split, of what further use could they be? An occasional enthusiast would pick one up. At home, at least, it would be regarded as an authentic relic of the battle-field. Besides, any one with a spark of inventive genius could see quite a number of uses to which a cartridge case could be put; articles of domestic ornament and convenience could be evolved—anything, for instance, from a flower-vase to a lady's powder-pot.

Those were early days however, and few there were, whether at home or at the front, who realised the extent to which "the war could be protracted" or "if its fortunes should be varied or adverse" were able to grasp the import of the warning that "exertions and sacrifices beyond any which had been demanded would be required from the whole nation and empire" (Lord Kitchener, House of Lords, August 25th, 1914).

When, however, it became increasingly apparent that "the operations not only of our Army but of our Allies were being crippled or at any rate hampered by our failure to provide the necessary ammunition," and since the cartridge was one of those "particular components which were essential" to the firing of the shell, the edict in due course went forth to the effect that "all fired cases should be returned at the first opportunity," for the very reason that with comparatively little trouble and at a minimum of cost (especially when the railway companies began devoting their attention to the task) these cases could be repaired, and that not only once, but frequently as many as half a dozen times before they were finally rejected as being totally and permanently unfit for further military service, in fact dangerous.

Cartridge cases varied, of course, in depth and diameter according to the type of shell, whether shrapnel or H.E., to which they were destined to be fitted, and to the type of gun, whether field gun or howitzer, within the breech of which they were to be fired. Thus the field gun with its long range and well-nigh flat trajectory (i.e. the curve described by the shell on its flight) required a heavier propellant charge with a high velocity than did the howitzer or high-angle gun, which throws a shell at a shorter range and with a high trajectory.

The "marks" of cartridge cases treated in Crewe Works were those appertaining to the 18-pounder gun and the 4·5 howitzer, and it so happened that just at the time of the formation of the Coalition Government in May, 1915, when, under the auspices of Mr. Lloyd George as Minister of Munitions, in the words of Sir J. French, "to organise the nation's industrial resources upon a stupendous scale was the only way if we were to continue with success the great struggle which lay before us," cartridge cases, bruised, and mud-bespattered, first commenced to make their appearance at Crewe. The earliest arrivals were the 18-pounder long or shrapnel shell cartridge cases, and the 30,000 odd of these cases which were repaired may be regarded as a foretaste of what was to follow, and were to some extent indicative of the then prevailing position in regard to the supply of ammunition to the B.E.F. in France. "As early as the 29th of October," writes Sir John French in his remarkable production entitled "1914," "the War Office were officially told that during the most desperate period of the first battle of Ypres, when the average daily expenditure of 18-pounder ammunition had amounted to 81 rounds per gun, and in some cases the enormous total of 300 rounds, the state of the ammunition supply had necessitated the issue of an order restricting expenditure to 20 rounds, and that a further restriction to 10 rounds would be necessary if the supply did not improve."

Actually during the winter 1914-1915 the number of rounds per 18-pounder gun fell to less than five! Shrapnel (which it is interesting to remember was first used in the Peninsular War of 1808-14, and of which the older form of shell was filled merely with gunpowder as compared with the modern filling of bullets) was, however, "ineffective against the occupants of trenches, breastworks, and buildings," consequently guns required 50 per cent. of high-explosive shell "to destroy many forms of fortified localities that the enemy constructs, more particularly his machine-gun emplacements"; and in a secret memorandum despatched by Sir John French to the War Office in the spring of 1915 it was urged that "large quantities of high-explosive shells for field guns have become essential owing to the form of warfare in which the Army is engaged." Evidently the "Talking Men" at the back were beginning to feel a little uncomfortable, if nothing else, in face of the reports which the "Fighting Men" at the front were sending home with a firm persistence, for in spite of "the disinclination of the War Office prior to the war to take up seriously the question of high explosives" due to the assumption that their true nature and the correct particulars which govern their construction were not properly understood, as they (the War Office) "had too little experience of them," and perhaps because of the fact, for instance, that "the battle (of Neuve Chapelle) had to be broken off after three days' fighting because we were brought to a standstill through want of ammunition," occasional consignments of 18-pounder long cases at Crewe grew less and less until they finally ceased altogether, being thereafter superseded by the shorter cases of the 4·5-inch high-explosive shell, which, as time went on, were showered on the Works in ever-increasing quantities; in fact, a total of close on two million had been dealt with when the All-Highest finally "threw up the sponge" and accomplished his memorable "bunk" into Holland.

To pick a cartridge case up and look at it, one would say that there was literally nothing in it; yet on second thoughts it is surprising what a number of features are embodied in its hollow and simple form.

It is solid drawn, of a substance the colour of brass called yellow metal, which is composed of 60 per cent. electrolytic copper and 40 per cent. zinc, and which costs actually £25 per ton less than brass. The base is integral and thick, with an external rim, behind which a clip automatically engages as the breech of the gun closes, for the purpose of extracting the case after the gun is fired. Into a hole in the centre of the base is screwed the percussion cap, which acts virtually in the capacity of a "sparking plug" to the gun, differing only from the familiar petrol-engine sparking plug, in that the spark which fires the propellant charge inside the cartridge case is created, not by the break of an electric current, but by the sudden shock or percussion of a striker against a cap in which is contained a thin, albeit highly explosive layer of fulminic acid and gunpowder.

The walls of the case are thin, thereby expanding against the walls of the breech of the gun, and preventing any escape of the propellent gases; and for the purpose of easy extraction they (the walls of the case) are slightly tapered to within about 1/2 inch of the mouth which fits parallel over the end of the shell.

Rolling out Dents in 4.5-inch Fired Cartridge Case

Rolling out Dents in 4·5-inch Fired Cartridge Case.

[To face p. 89.

Upon receiving a returned, or fired, cartridge case in the Works, the primer is first of all removed, then the case is boiled in a solution of caustic soda for the purpose of removing grease and dirt. What is known as a "hardness" test follows next in order of sequence, this to determine whether the metal of the case is still good for further service, and is performed by a little instrument known as a sclerometer (derived, as our classical contemporaries will tell us, from the Greek word (s??????, hard), consisting of a tube marked with a graduated scale down which a tiny metal ball is dropped on to the side of the case; the ball should rebound to a point on the scale approximating a height of two inches, anything below this proving that the metal has become too soft for further use, when the case is accordingly scrapped. The cases which show a requisite degree of hardness are then annealed or suitably tempered round the mouth, this process ensuring a subsequent loose fit round the end of the shell.

Rolling the mouth to internal limit gauges is effected by means of a specially improvised apparatus rigged up on the bed of an engine lathe, consisting of two fixed housings inside which runs a belt-driven sleeve bored to the correct taper of the cartridge case, and in which the latter is carried. A duplex ball-bearing roller running on a central spindle secured in a pad fixed to a cross-slide, and operated transversely by a pedal, applies pressure against the walls of the cartridge case, the dents and bruises being thus gently removed and an even surface obtained.

It should be borne in mind that the entire process of repairing these cartridge cases (with the exception of brazing by coppersmiths with an acetylene flame any cracks or splits which already existed or became apparent in the repairing operations) was carried out by female labour working three eight-hour shifts, and one of the neatest of the diverse mechanical requisites which the girls were called upon to operate and which was the immediate outcome of managerial forethought and ingenuity was an adaptation of an hydraulic press for the purpose of correctly reforming the taper walls of the cartridge case to the true form of the gun chamber or breech. A cast-iron block with recesses cored in (in which are fitted a rocking lever pivoted in the centre, and two hardened cast-steel dies, one on either side) repose on rolling bearings arranged on the bed of the press.

At each end of the rocking lever is attached an adjustable ejector ram acting centrally inside the cast-steel dies, which latter are bored taper to the required shape of the cartridge case. Upon inserting a cartridge case in each die, the cast-iron block is pushed transversely by hand across the bed of the press, bringing one of the cases central with the ram, which, when applied, forces the case home into the die, thereby pressing and reforming the walls to their true and original shape. The ram being withdrawn, the cast-iron block is pulled back so that the second cartridge case in its turn comes central with the ram and the effect of pressing it home in its own particular die is to push back the pivoted arm, the other end of which, advancing automatically, expels the previous and finished case; cartridge cases being inserted and ejected in this manner ad infinitum.

The cast-steel dies naturally become affected by constant use, more especially on the protruding shoulder against which the thickest part of the case (viz. where the walls rounded into the base) is pressed, this necessitating the shoulder being re-radiused perhaps every fortnight, and a slight readjustment of the die in the block.

To allow for expansion of the walls of the case when being ejected after compression, the dies are turned slightly smaller (say 3/1000 parts of an inch) than the required finished size.

After being pressed, the primer holes of the cartridge case (known as the plain and platform holes respectively) are rectified by a double-reamer, the case revolving in a sleeve bored to correct taper of the outside diameter of the case, this assuring concentricity of the two holes, and ensuring that the primer face and percussion cap lie flush with the base of the case. A forming tool, having a non-cutting face which acts as a depth guide against the base, corrects the outer rim and shoulder.

A hand-tapping machine clamped centrally to a suitable fixture on a bench was devised for re-tapping primer-holes. This consists of a floating bracket which accurately guides the tap into the existing thread, at the end of the tap being fixed a hand-operated capstan wheel, and on the tap a stop to regulate the depth of the screw.

A similar apparatus fitted with a sliding screw-driver removes the primers; the cartridge case in either event being securely held and easily fixed or released in a central clamp.

Finally, after being immersed for a couple of minutes in a solution of sulphuric acid, the cartridge case is polished with sand and sawdust on a wooden pad covered with tapestry and revolving in a lathe at 300 or 400 revolutions per minute.

The result of garnering in and renovating these cartridge cases instead of turning them adrift in the battle area, reckoned in figures of pounds, shillings, and pence, was undoubtedly very considerable; for apart altogether from the saving effected in the cost of labour when repairing old cartridge cases as compared with the manufacture of new ones, the weight of metal alone contained in a couple of million cases may be taken at approximately 1500 tons; and with yellow metal costing £82 12s. 0d. per ton, the saving in metal alone amounts to no less than £123,900.


                                                                                                                                                                                                                                                                                                           

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