McGraw-Hill book Company, Incorporated, 1920 - Mechanical drawing - 147 pages

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### Contents

 CHAPTER 1 Detail Drawings 6 Scale 8 Title 10 Tracing 11 Blue Printing 12 Vandykes 13 Problems 14
 Line Shading 60 Special Cases 62 Problems 66 CHAPTER V 67 Examination 68 Problem 74 CHAPTER VI 75 Examples of Structural Drawings 79

 CHAPTER II 15 Pitch Diameter 17 Circular Pitch 18 Addendum Circle 19 Dedendum Circle 21 Tables of Tooth Parts 22 Velocity Ratio 23 Special Gears 25 Problems 30 CHAPTER III 31 Worm and Worm Wheel 36 Shop Drawing of Worm and Worm Wheel 38 Special Gears 39 Problems 46 CHAPTER IV 47 Cabinet Drawing 53 Shaded Drawings 57
 Templet Shop 83 Beam Shop 84 CHAPTER VII 86 Wire Size 87 Twowire Circuits 89 Threewire Circuits 90 Wiring Diagrams 93 Problem 97 CHAPTER VIII 100 Pipe Thread 101 Art Page 102 CHAPTER IX 114 Seams 121 CHAPTER X 132 Allowance for Thickness of Metal 139 Index 145 Copyright

### Popular passages

Page 68 - ... in such full, clear, concise, and exact terms as to enable any person skilled in the art or science to which it appertains, or with which it is most nearly connected, to make, construct, compound, and use the same; and in case of a machine, he...
Page 119 - Approximate Thickness In Fractions of an Inch Approximate Thickness In Decimal Parts of an Inch Weight per Square Foot In Ounces Avoirdupois Weight per Square Foot In Pounds Avoirdupois...
Page 18 - The circular pitch is the distance from the center of one tooth to the center of the next tooth, measured along the pitch circle.
Page 69 - The space for heading must then be reserved at the right and the signatures placed at the left, occupying the same space and position as in the upright views and being horizontal when the sheet is held in an upright position. One figure must not be placed upon another or within the outline of another.
Page 70 - ... all lines, however fine, to shading, and to lines representing cut surfaces in sectional views. All lines must be clean, sharp, and solid, and they must not be too fine or crowded. Surface shading, when used, should be open. Sectional shading should be made by oblique parallel lines, which may be about one-twentieth of an inch apart. Solid black should not be used for sectional or surface shading.
Page 38 - D, and p are calculated the same as for spur gears. T has the same value as the outside diameter of a spur gear of the same pitch and number of teeth. F will be sufficiently accurate when calculated from the formula in the parenthesis.
Page 69 - All views on the same sheet must stand in the same direction and should, if possible, stand so that they can be read with the sheet held in an upright position.
Page 17 - ... divide the number of teeth by the diametral pitch. Example : What is the pitch diameter of a gear having 66 teeth of 12 diametral pitch?
Page 121 - After the pattern has been developed on man ilia paper, which is generally used in the shop, it is placed on the tin plate and a few weights laid on top of the paper; then with a sharp scratch awl or prick punch and hammer, slight prick-punch marks are made, larger dots indicating a bend. The paper is then removed and lines scribed on the plate, using the scratch awl for marking the straight lines, and a lead pencil for the curved lines. After laps are added as required, it is ready to be cut out...
Page 69 - ... at the lower lefthand corner, all within the marginal line, but in no instance should they trespass upon the drawings.