Treatise on the Construction and Manufacture of Ordnance in the British Service. Prepared in the Royal Gun Factory |
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Treatise On the Construction and Manufacture of Ordnance in the British ... John Fletcher Owen No preview available - 2022 |
Treatise on the Construction and Manufacture of Ordnance in the British ... John Fletcher Owen No preview available - 2018 |
Common terms and phrases
9-inch guns angle Armstrong artillery axis Blank block breech coil breech end breech-piece breech-screw calibre Carronades cascable cast iron CHAP charge Committee common shell construction converted guns copper cylinder defects diameter distance drill elastic elastic limit elevating employed experimental experiments field guns fire fore sight forged friction tube Fuze gauge grooves gun metal guns and upwards gutta-percha hammer heavy guns hole howitzer inch inner barrel iron guns jacket LENGTH OF BORE lever machine manufacture Mark Mark II means mortars muzzle NOMINAL LENGTH pattern pieces plate powder chamber pressure projectile R.M.L. guns range rifled guns Rifled M.L. Gun round S.B. guns Scale screw Shoeburyness shot shunt side siege slot socket steam hammer steel barrel steel tube studs TABLE tangent sight thread TOTAL LENGTH trunnion ring trunnion sights tube toughened steel twist velocity vent-piece vide weight welded Woolwich wrought iron yards
Popular passages
Page 115 - It is then raised vertically again and a punch or mandrel rather over half the length and a little larger than the interior diameter of the coil, is hammered down its own length ; the coil is next placed on its side and hammered round, that half of its length thus being made very compact...
Page 117 - To weld them together, the coils have to be faced (turned smooth at the ends) and reciprocally recessed ; that is, a projection (spigot) is formed at one end of a coil, while a recess (faucet) is bored in the corresponding end of another coil. The height of the shoulder is a little greater than the depth of the recess, in order that a close joint may be obtained on the interior. The recess is then expanded by heat and shrunk over the projection, so that the two coils are attached securely enough...
Page 373 - If there be no convenience on service for the performance of the steaming process, simple washing may have to be employed instead. The whole object is to get rid of oil which may remain on the surface of the iron, and hence the water should be as hot as can be borne by the operator, who will rub vigorously all over the exterior surface with a clean hard brush ; a little hard soap should be used, and the water should be frequently changed BO as to ensure its perfect cleanness.
Page 168 - The formation of a heavy coil is a simple forge operation, but great expense is saved by its means, as there is much less surface to be bored and turned, for each coil having to be made as smooth as possible, and at the same time true to gauge (to a thousandth of an inch), it follows that it must be cheaper to have a few thick ones in lieu of many thin ones. For the same reason there is also less waste of material ; for although the turnings are afterwards worked up into bars, iron in its scrap state...
Page 117 - ... through a furnace so constructed that intense heat acts on the joint while the remote ends project outside. When the joint arrives at a welding heat, a stout iron bar is passed right through the tube; this bar is keyed at one end, and by means of a screw-nut, worked by a long lever at the other end, the two coils are pressed and thus welded together.
Page 117 - ... in a reverberatory furnace at a low temperature). It is then raised up by a travelling crane overhead, and dropped over the part on to which it is to be shrunk, which is placed vertically in a pit ready to receive it, and where the tube and jacket cool oft'.
Page 115 - ... prop, is loosened and slips down toward the narrow end of the mandrel. The mandrel is then lifted up by a crane and the coil drops off. For the welding, which, especially in tubes for lining guns, must be...
Page 2 - Malleability is the property of being permanently extended in all directions without rupture by pressure (as in rolling) or by impact (as in hammering). It is opposed to brittleness, which is the tendency to break more or less readily under compression either gradual or sudden.
Page 168 - ... follows that it must be cheaper to have a few thick ones in lieu of many thin ones. For the same reason there is also less waste of material ; for although the turnings are afterwards worked up into bars, iron in its scrap state is only worth one-third of its forged value. Moreover, time and labour are also saved in having fewer pieces to move from workshop to workshop ; for instance, in the case of a gun of original construction, when a coil was shrunk on, the mass had to be moved from the shrinking...