Part 2
mechanical means of determining the balance of rotary parts .. 109 A novel plan of balancing long cylinders - - - o i - - L111 Balancing bars for the workshop .. . . - - . + . « Ill CONTENTS. SAWS AND SAWING MACHINERY. The antiquity of reciprocating or parallel saws .. . The circular saw with rotary action, the reason of its later discovery... Reciprocating timber-sawing machinery .. Forest sawing machinery used in America Extent of the lumber traftic in America The gang-saw mill and its capacity oe Local conditions that affect the plans of lumber ‘mills ; in n America The change in the value of lumber in America . - Steel as a material for saw frames The “ Muley ” saw mill of America i - - - oe - - Single-geared Muley saw mills .. - - - - we oe Single-geared or direct-geared circular-saw mill .. ) Saw mills, horizontal reciprocating saws. Circular-saw mills for forest use .. Wood framing for circular-saw mills The manufacture of circular-saw mills in America Steam-engines for portable saw mills Recent application of circular saws to cutting large timber The difficulty of operating circular lumber-saws . i Circular saws require a specific speed to give the best results .. The influence of high speed on circular-saw plates Means of guiding circular saws and holding the plates by lateral quid Packing-boxes for circular saws, and their advantages .. End motion for the spindles of circular lumber-saws RE-SAWING MACHINERY. The difference between the lumber traffic in Europe and America The great waste of the American system of lumber traffic Kerf waste in timber sawing in America . Waste from warping, dirty surfaces, and the breakage and cost of handling .. - The relation that re-sawing machinery bears to wood-working mills or factories, Borope Circular saws for re-sawing lumber An example of a circular re-sawing machine at Cincinnati, U. 8. Splitting-saws for narrow planks and boards The difference in the width of lumber to be re-sawed in 1 Europe and America THE BAND SAW AND BAND SAWING. The present interest felt in band sawing .. The principles of its operation, and its advantages compared with other saws . The mechanical difficulties to be encountered in its application - The fracturing of band-saw blades - - . - Resisting the back-thrust of band-saw blades The blades, their temper and means of testing them Teeth of band saws for power-feeding machines Setting the teeth of band saws - . Joining band-saw blades .. The manufacture of band saws Perin and Co.’s band-saw blades .. PAGE 113 118 115 115 117 117 117 121 128 127 127 129 131 131 133 133 133 135 135 187 137 189 141 141 141 141 143 147 147 147 149 149 149 --. 161 151 153 155 157 159 161 161 X1V CONTENTS. BAND SAWING MACHINERY. Hand-feeding or scroll-cutting band sawing machines .. Framing of band-saw machines, its rigidity and strength Elasticity of the straining or tension mechanism The degree of tension, conflicting opinions, and examples Guides and supports for the blades . A novel expedient for resisting the back-thrust of band-saw blades Lateral or side guides for band saws - . Description of a large band-saw mill at New York - ee JIG SAWS. The endless modifications of the jig saw . es The reason that it has not assumed a standard form of construction Means of straining web saws by positive connections and springs Torsional or twisting springs for jig saws Unstrained web saws SLITTING AND CROSS-CUTTING SAWS. Saw-benches, their changes and improvement - Proportions for pulleys and belts for driving hand-feeding saws American saw-benches, their imperfect character as compared with those used i in ‘England and on the Continent The economy of labour, and the economy ‘of material i in ‘cutting out with Saws Cross-cutting saws for hand feed . Crown saws and tubular saws Description of a tubular sawing machine for making troughs and tubes of wood CUTTING AND CUTTERS. Cutting, the principle ofall operations in wood conversion Cutting-edges considered as an application of the wedge Cross-cutting and splitting the fibre of wood i Propositions containing the general principles of wood cutting .. Cutters for moulding and planing machines Thin or flexible cutters for planing machinery . Helical cutters of M. Arbey, of Paris... - Machinery for grinding the cutters of planing machinery The angle of cutting-edges Conditions to be considered in determining the angle of cutters: Description of, and remarks upon, the machinery used °Y the Ohio Tool ol Company General remarks upon the angle of cutters PLANING MACHINERY. Carriage-planing machines Parallel-planing machines .. gurface-planing machines .. ° Remarks on carriage-planing machines, with traversing and parallel cutters . PAGE 163 168 165 165 167 171 171 178 175 175 177 179 179 181 181 183 185 185 187 187 191 191 191 193 195 195 197 197 199 . 199 201 205 207 207 209 209