The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . Fig. understand the proper angle for a cutter to mill, or burr the stock, sothat it will bend into the proper angle andmake it a right joint. Fig. 210 will conveya very good idea of the proper shapes or anglesfor such cutters. The angle of the cutter onthe number of sides the article is to have, andcan always be determined by rule. The ruleis a simple one, which is to divide 360° by thenumber of sides to the angle, i. e., 360-7-4 = MILLING FIXTURE. This atta
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . Fig. understand the proper angle for a cutter to mill, or burr the stock, sothat it will bend into the proper angle andmake it a right joint. Fig. 210 will conveya very good idea of the proper shapes or anglesfor such cutters. The angle of the cutter onthe number of sides the article is to have, andcan always be determined by rule. The ruleis a simple one, which is to divide 360° by thenumber of sides to the angle, i. e., 360-7-4 = MILLING FIXTURE. This attachmentis fitted to the slide rest and holds the wirechuck vertically under the center of the lathe,so that articles held in the chucks can be fed under mills or saws heldin the saw arbor. Fig. 211. 245 Miter Gears. MITER GEARS. Gears whose shafts are at right angles to eachother and whose diameters are equal. All miter gears are bevel gears,but all bevel gears are not miter gears MOINET, LOUIS. A clever watchmaker and writer of was born at Bourges, in 1768 and died in 1853. MOMENT OF ELASTICITY of a spring is its power of resist-ance. It varies directly as the modulus of elasticity of the material, andas the breadth and the cube of the thickness of the spring when its sec- * tion IS rectangular. Mo= E —— is Mr. T. D. Wrights formula, E rep- resenting the modulus of elasticity, b the breadth, and t the thickness of the spring. The moment of elasticity must not be confounded with the bending moment. The bending moment is a measure of the resistanc
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