The "How-to-do-it" Books
Reading edition
PRACTICAL MECHANICS FOR BOYS
THE "HOW-TO-DO-IT" BOOKS PRACTICAL MECHANICS FOR BOYS In language which every boy can understand and so arranged that he may readily carry out any work from the instructions given. WITH MANY ORIGINAL ILLUSTRATIONS By J. S. ZERBE, M.E. Author of CARPENTRY FOR BOYS ELECTRICITY FOR BOYS M. A. DONOHUE & COMPANY CHICAGO :: NEW YORK
Copyright, 1914, by THE NEW YORK BOOK COMPANY
Made in U. S. A.
CONTENTS
Introductory Page 1
I. On Tools Generally Page 7
Varied Requirements. List of Tools. Swivel Vises. Parts of Lathe. Chisels. Grinding Apparatus. Large Machines. Chucks. Bench Tools. Selecting a Lathe. Combination Square. Micrometers. Protractors. Utilizing Bevel Protractors. Truing Grindstones. Sets of Tools. The Work Bench. The Proper Dimensions. How Arranged.
II. How to Grind and Sharpen Tools Page 26
Importance of the Cutting Tool. The Grinder. Correct Use of Grinder. Lathe Bitts. Roughing Tools. The Clearance. The Cutting Angle. Drills. Wrong Grinding. Chisels. Cold Chisels. System in Work. Wrong Use of Tools.
III. Setting and Holding Tools Page 34
Lathe Speed. The Hack-saw. Hack-saw Frame. The Blade. Files. Grindstones. Emery and Grinding Wheels. Carelessness in Holding Tools. Calipers. Care in Use of Calipers. Machine Bitts. The Proper Angle for Lathe Tools. Setting the Bitt. The Setting Angle. Bad Practice. Proper Lathe Speeds. Boring Tools on Lathe. The Rake of the Drill. Laps. Using the Lap. Surface Gages. Uses of the Surface Gage.
IV. On the First Use of the File Page 48
The First Test. Filing an Irregular Block. Filing a Bar Straight. Filing Bar with Parallel Sides. Surfacing Off Disks. True Surfacing. Precision Tools. Test of the Mechanic. Test Suggestions. Use of the Dividers. Cutting a Key-way. Key-way Difficulties. Filing Metal Round. Kinds of Files. Cotter-file. Square. Pinion. Half-round. Round. Triangular. Equalizing. Cross. Slitting. Character of File Tooth. Double Cut. Float-cut. Rasp Cut. Holding the File. Injuring Files. Drawing Back the File.
V. How to Commence Work Page 61
Familiarity with Tools. File Practice. Using the Dividers. Finding Centers. Hack-saw Practice. Cutting Metal True. Lathe Work. First Steps. Setting the Tool. Metals Used. The Four Important Things. Turning Up a Cylinder. Turning Grooves. Disks. Lathe Speeds.
VI. Illustrating Some of the Fundamental Devices Page 68
Belt Lacing. Gears. Crown Wheel. Grooved Friction Gearing. A Valve which Closes by the Water Pressure. Cone Pulleys. Universal Joint. Trammel for Making Ellipses. Escapements. Simple Device to Prevent a Wheel or Shaft from Turning Back. Racks and Pinions. Mutilated Gears. Simple Shaft Coupling. Clutches. Ball and Socket Joints. Tripping Devices. Anchor Bolt. Lazy Tongs. Disk Shears. Wabble Saw. Crank Motion by a Slotted Yoke. Continuous Feed by Motion of a Lever. Crank Motion. Ratchet Head. Bench Clamp. Helico-volute Spring. Double helico-volute. Helical Spring. Single Volute Helix Spring. Flat Spiral, or Convolute. Eccentric Rod and Strap. Anti-dead Center for Lathe.
VII. Properties of Materials Page 79
Elasticity. Traction. Torsion. Flexure. Tenacity. The Most Tenacious Metal. Ductility. Malleability. Hardness. Alloys. Resistance. Persistence. Conductivity. Equalization. Reciprocity. Molecular Forces. Attraction. Cohesion. Adhesion. Affinity. Porosity. Compressibility. Elasticity. Inertia. Momentum. Weight. Centripetal Force. Centrifugal Force. Capillary Attraction. The Sap of Trees. Sound. Acoustics. Sound Mediums. Vibration. Velocity of Sound. Sound Reflections. Resonance. Echos. Speaking Trumpet. The Stethoscope. The Vitascope. The Phonautograph. The Phonograph. Light. The Corpuscular Theory. Undulatory Theory. Luminous Bodies. Velocity of Light. Reflection. Refraction. Colors. The Spectroscope. The Rainbow. Heat. Expansion.
VIII. How Draughting Becomes a Valuable Aid Page 95
Lines in Drawing. Shading. Direction of Shade. Perspectives. The Most Pronounced Lines. Direction of Light. Scale Drawings. Degree, and What it Means. Memorizing Angles. Section Lining. Making Ellipses and Irregular Curves. Focal Points. Isometric and Perspective. The Protractor. Suggestions in Drawing. Holding the Pen. Inks. Tracing Cloth. Detail Paper. How to Proceed. Indicating Material by Section Lines.
IX. Treatment and Use of Metals Page 112
Annealing. Toughness and Elasticity. The Process. Tempering. Tempering Contrasted with Annealing. Materials Used. Gradual Tempering. Fluxing. Uniting Metals. Alloying Method. Welding. Sweating. Welding Compounds. Oxidation. Soldering. Soft Solder. Hard Solder. Spelter. Soldering Acid. The Soldering Iron.
X. On Gearing, and How Ordered Page 121
Spur and Pinion. Measuring a Gear. Pitch. Diametral Pitch. Circular Pitch. How to Order a Gear. Bevel and Miter Gears. Drawing Gears. Sprocket Wheels.
XI. Mechanical Power Page 128
The Lever. Wrong Inferences from Use of Lever. The Lever Principle. Powers vs. Distance Traveled. Power vs. Loss of Time. Wrongly-Directed Energy. The Lever and the Pulley. Sources of Power. Water Power. Calculating Fuel Energy. The Pressure or Head. Fuels. Power from Winds. Speed of Wind and Pressure. Varying Degrees of Pressure. Power from Waves and Tides. A Profitable Field.
XII. On Measures Page 139
Horse Power. Foot Pounds. Energy. How to Find Out the Power Developed. The Test. Calculations. The Foot Measure. Weight. The Gallon. The Metric System. Basis of Measurement. Metrical Table, Showing Measurements in Feet and Inches.
XIII. Useful Information for the Workshop Page 148
Finding the Circumference of a Circle. Diameter of a Circle. Area of a Circle. Area of a Triangle. Surface of a Ball. Solidity of a Sphere. Contents of a Cone. Capacity of a Pipe. Capacity of Tanks. To Toughen Aluminum. Amalgams. Prevent Boiler Scaling. Diamond Test. Making Glue Insoluble in Water. Taking Glaze Out of Grindstone. To Find Speeds of Pulleys. To Find the Diameters Required. To Prevent Belts from Slipping. Removing Boiler Scale. Gold Bronze. Cleaning Rusted Utensils. To Prevent Plaster of Paris from Setting Quickly. The Measurement of Liquids with Spoons.
XIV. Simplicity of Great Inventions and of Nature's Manifestation Page 152
Invention Precedes Science. Simplicity in Inventions. The Telegraph. Telephone. Transmitter. Phonograph. Wireless Telegraphy. Printing Telegraph. Electric Motor. Explosions. Vibrations in Nature. Qualities of Sound. The Photographer's Plate. Quadruplex Telegraphy. Electric Harmony. Odors. Odophone. A Bouquet of Vibrations. Taste. Color.
XV. Workshop Recipes and Formulas Page 160
Adhesives for Various Uses. Belt Glue. Cements. Transparent Cement. U. S. Government Gum. To Make Different Alloys. Bell-metal. Brass. Bronzes. Boiler Compounds. Celluloid. Clay Mixture for Forges. Modeling Clay. Fluids for Cleaning Clothes, Furniture, etc. Disinfectants. Deodorants. Emery for Lapping Purposes. Explosives. Fulminates. Files, and How to Keep Clean. Renewing Files. Fire-proof Materials or Substances. Floor Dressings. Stains. Foot Powders. Frost Bites. Glass. To Frost. How to Distinguish. Iron and Steel. To Soften Castings. Lacquers. For Aluminum and Brass. Copper. Lubricants. Paper. Photography. Plasters. Plating, Coloring Metals. Polishes. Putty. Rust Preventives. Solders. Soldering Fluxes. Steel Tempering. Varnishes. Sealing Wax.
XVI. Handy Tables Page 178
Table of Weights for Round and Square Steel. Table of Weight of Flat Steel Bars. Avoirdupois Weight. Troy Weight. Apothecaries' Weight. Linear Measure. Long Measure. Square Measure. Solid or Cubic Measure. Dry Measure. Liquid Measure. Paper Measure. Table of Temperatures. Strength of Various Metals. Freezing Mixtures. Ignition Temperatures. Power and Heat Equivalents.
XVII. Inventions and Patents, and Information About the Rights and Duties of Inventors and Workmen Page 188
The Machinist's Opportunities. What is an Inventor? Idea Not Invention. What an Invention Must Have. Obligation of the Model Builder. Paying for Developing Devices. Time for Filing an Application. Selling an Unpatented Invention. Joint Inventors. Joint Owners Not Partners. Partnerships in Patents. Form of Protection Issued by the Government. Life of a Patent. Interference Proceedings. Concurrent Applications. Granting Interference. Steps in Interference. First Sketches. First Model. First Operative Machine. Preliminary Statements. Proving Invention. What Patents Are Issued For. Owner's Rights. Divided and Undivided Patents. Assignments. How Made. What an Invention Must Have. Basis for Granting Patent in the United States. Reasons for Granting Abroad. Original Grants of Patents. International Agreement. Application for Patents. Course of Procedure. Costs. Filing a Matter of Secrecy.
Glossary of Words Page 195
Index Page 213
LIST OF ILLUSTRATIONS
FIG. PAGE
1. Bench vise 8
2. Pipe grip for vise 9
3. Swivel vise 10
4. Speed lathe 11
5. Calipers 12
6. Engine lathe 13
7. Center gage 14
8. Pocket screw and wire gage 15
9. Handy bench vise 16
10. Combination square 17
11. Uses of the combination square 18
12. A quick adjusting micrometer 19
13. Universal bevel protractor 20
14. Uses of universal bevel protractor 21
15. Grindstone truing device 22
16. Set of tools and case 23
17. The work bench 24
18. Hook tool 28
19. Parting tool 28
20. Knife tool 28
21. Right-hand side tool 28
22. Internal tool 28
23. Left-hand side tool 28
24. Tool for wrought iron 29
25. Tool for cast iron 29
26. End view of drill 31
27. Side view of drill 31
28. Hack-saw frame 35
29. Hack-saw blade 35
30. Plain hook tool 38
31. Plain straight tool 38
32. Proper angles for tools 39
33. Angles for tools 39
34. Angles for tools 39
35. Set of the bitt 40
36. Correct angle 41
37. Wrong angle 41
38. Too low 42
39. Improper set 42
40. Internal set 43
41. Set for brass 43
42. Surface gage 44
43. Uses of surface gage 46
44. Rounded surface 49
45. Winding surface 49
46. Hexagon nut 51
47. Laying off hexagon nut 51
48. Cutting key-way 52
49. Key-seat rule 54
50. Filing metal round 54
51. Filing metal round 54
52. Making a round bearing 55
53. Making a round bearing 55
54. Cross section of file 56
55. Files 58
56. Correct file movement 59
57. Incorrect file movement 60
58. Belt lacing 69
59. Belt lacing 69
60. Belt lacing 69
61. Belt lacing 69
62. Bevel gears 71
63. Miter gears 71
64. Crown wheel 71
65. Grooved friction gears 71
66. Valve 71
67. Cone pulleys 71
68. Universal joint 71
69. Trammel 73
70. Escapement 73
71. Device for holding wheel 73
72. Rack and pinion 73
73. Mutilated gears 73
74. Shaft coupling 73
75. Clutches 75
76. Ball and socket joints 75
77. Fastening ball 75
78. Tripping devices 75
79. Anchor bolt 75
80. Lazy tongs 75
81. Disc shears 75
82. Wabble saw 76
83. Continuous crank motion 76
84. Continues feed 76
85. Crank motion 76
86. Ratchet head 76
87. Bench clamp 76
88. Helico-volute spring 77
89. Double helico-volute 77
90. Helical spring 77
91. Single volute-helix 77
92. Flat spiral or convolute 77
93. Eccentric rod or strap 77
94. Anti dead-centers for lathes 77
95. Plain circle 95
96. Ring 96
97. Raised surface 96
98. Sphere 96
99. Depressed surface 96
100. Concave 97
101. Forms of cubical outlines 98
102. Forms of cubical outlines 98
103. Forms of cubical outlines 98
104. Forms of cubical outlines 98
105. Shading edges 99
106. Shading edges 99
107. Illustrating heavy lines 100
108. Illustrating heavy lines 100
109. Lines on plain surfaces 101
110. Lines on plain surfaces 101
111. Illustrating degrees 102
112. Section lining 103
113. Drawing an ellipse 104
114. Perspective at angles 106
115. Perspective of cube 107
116. Perspective of cube 107
117. Perspective of cube 107
118. Protractor 108
119. Using the protractor 109
120. Section-lining metals 110
121. Spur gears 122
122. Miter gear pitch 123
123. Bevel gears 124
124. Laying of miter gears 125
125. Sprocket wheel 128
126. Simple lever 129
127. Lever action 130
128. The pulley 132
129. Change of direction 133
130. Change of direction 133
131. Steam pressure 135
132. Water pressure 135
133. Prony brake 141
134. Speed indicator 142