A Practical Course in Mechanical Drawing for Individual Study and Shop Classes, Trade and High Schools |
Common terms and phrases
altitude apothem base Bisect bisector bolt CHAPTER chords circle tangent circumference cone connecting rod Construction conventions curve cycloidal cylinder describe an arc describe arc determined develop diagonal diametral pitch draftsman draw the plan Draw three views drawn elliptic elliptic curve engineer epicycloidal figure freehand front axis front elevation frustum Gas Producer given circle given line height Heptagon horizontal ICE BOAT Illustrations Shop Notes inch interior angle involute isometric drawing letters line of penetration Maltese cross MECHANICAL DRAWING Molding NOTES Vol object revolves oblique to H Ogee Pages Vol parallel pattern patternmaker pencil perimeter perpendicular pipe plate polygon POPULAR MECHANICS Postpaid Problem projections protractor pyramid radial line radius right angles right section roof plane ruling-pen Scale screw thread sectional view shown side axis spiral square Taboret tangent thread tical tion tooth triangle true length truncated upper views and dimensions width workman
Popular passages
Page 41 - Cycloid. The cycloid is a curve generated by a point on the circumference of a circle which rolls on a straight line tangent to the circle.
Page 41 - A cycloid is the curve generated by the motion of a point on the circumference of a circle rolled in a plane along a straight line. If the circle is rolled on the outside of another circle, the curve generated is called an "epicycloid"; if rolled on the inside, it is called a "hypocycloid.
Page 12 - Fig. i. 7. The triangles, which are used to draw oblique and perpendicular lines, should rest upon the upper edge of the T square. Many and various combinations of angles may easily be made by combining both the 30-60 and 45-90. The oblique side of the triangle should always be to the right while in use, whether in inking or penciling.
Page 12 - ... instrument. 3. To get clean, sharp lines, pencils should be sharpened frequently, but under no circumstances must ridges be made on the drawing by heavy pressure on the pencil. 4. Use a soft gum eraser to clean the drawing before inking, that a glossy finish, to black lines may be retained. Use ink-erasers for pencil lines only in exceptional cases where the pencil has caused deep ridges in the paper. All division lines should be erased before inking. 5. All dimensions should be stepped off from...