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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
of permitting them to be cast into the scrap-heap, is one of the most beautiful triumphs of modern mechanism. It has proved itself capable of adaptation to large as well as small machinery, and is now applied to the locomotives of the Pennsylvania Central Railroad, whose parts are made interchangeable. The first notice in this country of this excellent mode of manufacturing a number of articles designed to be exactly similar, is the breech-loading rifle of John H. Hall, of North Yarmouth, Massachusetts, patented May 21, 1811, and which he refers to in the following terms in a letter to the War Department: Only one point now remains to bring the rifles to the utmost perfection, which I shall attempt if the government contracts with me for the guns to any considerable amount, namely, to make every similar part of every gun so much alike that it will suit every gun, so that if 1,000 guns are taken apart and the limbs thrown promiscuously together in one heap, they may be taken pro
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
knob on the muzzle, by bringing which into line with the object the line of fire is directed. Trigger-plate; the iron plate in which the triggers work. Worm; the screw at the end of the ramrod. Of the gun-lock the parts are the Bridle.Sear-spring. Chain, or swivel.Spring-cramp. Cock, or hammer.Trigger. Lock-plate.Tumbler. Main-spring.Tumbler-screw. See gun-lock. Sear. The first patent in the United States for a breechloading fire-arm was to Thornton and Hall of North Yarmouth, Mass., May 21, 1811. Between that time and 1839 more than 10,000 of these arms were made and were issued to the troops in garrison and on the frontier. This gun is represented at N, Plate 16, and had a breech-block, which was hinged on an axial pin at the rear, and tipped upwardly at front to expose the front end of the charge-chamber. The flint-lock and powder-pan were attached to the vibrating breech-block. The arm is shown and described in detail in General Norton's American breech-