Shop Mathematics ...: Prepared in the Extension Division of the University of Wisconsin, Τόμος 1

McGraw-Hill book Company, Incorporated, 1924

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Περιεχόμενα

 CHAPTER 1 To find the L C D 12 CHAPTER III 19 CHAPTER IV 27 Addition 28 Multiplication 29 Reducing dollars to cents 30 Reducing cents to dollars 31
 Mechanical advantage 146 The wheel and axle 147 Efficiency 150 CHAPTER XIII 155 Differential pulleys 158 The use of inclined planes 159 The wedge 161 The jack screw 162

 Wage calculations 32 CHAPTER V 37 Addition and subtraction 39 Multiplication 40 Short cuts 41 Reducing common fractions to decimals 43 Complex decimals 44 The decimal fraction in machine work 47 CHAPTER VI 53 The uses of percentage 55 Efficiencies 57 Classes of problems 58 1 63 Formulas 64 Circumferential speeds 66 1 66 Grindstones and emery wheels 68 Cutting speeds 70 Pulleys and belts 72 CHAPTER VIII 75 Proportion 76 Inverse proportion 78 Speeds and diameters of pulleys 79 CHAPTER IX 83 Gear and pulley trains 84 Compound gear and pulley trains 85 Screw cutting 87 CHAPTER X 93 Extracting the square root 94 Square roots of mixed numbers 95 Square roots of decimals 96 Rules for square root 97 The law of right triangles 98 The value of tables 100 CHAPTER XI 127 Area of a circle 129 Measure of volume 132 Finding the volume 133 Weights of metals 136 Short rule for plates 137 Finding dimensions from weights or volumes 138 CHAPTER XII 141 Three classes of levers 144 ART PAGE 87 Compound levers 145
 CHAPTER XIV 167 Power 168 Horsepower of belting 169 Widths of belts 171 Rules for belting 172 CHAPTER XV 177 Gas engines 180 Air compressors 181 Brake horsepower 182 Frictional horsepower 183 Mechanical efficiency 184 CHAPTER XVI 187 Transmission of pressure through fluids 189 The hydraulic jack 190 Hydraulic machinery 193 Steam and air 195 CHAPTER XVII 197 Temperatures 198 Expansion and contraction 202 Allowances for shrink fits 205 Unit of heat 206 CHAPTER XVIII 209 Unit stress 210 Ultimate strength 211 Strengths of bolts 212 Strengths of hemp ropes 214 Columns 215 CHAPTER XIX 219 Use of logarithmic tables 220 Interpolation 221 Antilogarithms 223 Division by garithms 224 Roots and powers 225 CHAPTER XX 231 Calculation by logarithmic scale 233 The simple slide rule 236 Description of a slide rule 240 Slide rule setting 241 Roots and powers 246 Decimal point 249 INDEX 251 Πνευματικά δικαιώματα

Δημοφιλή αποσπάσματα

Σελίδα 129 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30j square yards = 1 square rod (sq.
Σελίδα 8 - TIME 60 seconds (sec.) = 1 minute (min.) 60 minutes =1 hour (hr.) 24...
Σελίδα 163 - Fig. 49. We will solve this problem partly graphically and partly by calculation. The first step is to find how fast the crank pin D is moving. For one turn of the crank, D travels through a distance equal to the circumference of a circle whose radius is R, that is, a distance of 2'ffTi.
Σελίδα 3 - An Improper Fraction is one whose numerator is equal to, or greater than, the denominator; as, f, f.
Σελίδα 41 - To divide by 10, move the decimal point one place to the left. To divide by 100, move the decimal. point two places to the left, and so on for other powers of 10.
Σελίδα 5 - When the numerator is less than the denominator, the value of the fraction is less than 1. 5th. When the numerator is equal to the denominator, the value of the fraction is equal to 1. 6th. When the numerator is greater than the denominator, the value of the fraction is greater than 1.
Σελίδα 76 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 41 - To multiply by 10, move the decimal point one place to the right, annexing a zero if necessary.
Σελίδα 2 - Definition of a Fraction. — A Fraction is one or more of the equal parts into which anything may be divided.