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Elementary Mechanical Drawing: Theory and Practice (Classic Reprint)
Charles William Weick
No preview available - 2015
1.—Make a drawing angle of 30 angle of 45 arc intersecting axis beam compass bell crank celluloid center line chord circular arcs circumference cross-section cubic inches cylinder diameter dimensions distance Divide draftsman draw a line draw an arc draw arc draw lines draw small arcs drawing showing edge ellipse end view erasure example Example.—Find front view Geometrical given line ground line H projection hidden lines horizontal lines horizontal plane inches from H inches long inclined instruments letters line drawn mechanical drawing mortise and tenon Note.—The number of equal orthographic projection paper parallel to H pencil Pentagonal Pyramid perpendicular plane figure planes of projection plate shows polygon practice prism Problem 1.—Draw Problem 1.—Make Projection Line protractor revolved section right angles second position shade lines shown side space square inches straight lines surface T-square tangent top view triangle triangular prism true length vertical plane weight width
Page 224 - PERIPHERY of a circle is its entire bounding line ; or it is a curved line, all points of which are equally distant from a point within called the center.
Page 189 - Draw two diameters AB and CD at right angles to each other. Bisect the radius eB.
Page 217 - An acute angle is less than a right angle.* -? An obtuse angle is greater than a right angle and less than a straight angle.
Page 195 - AB of the circle into as many equal parts as the polygon is to have sides. With the points A and B as centers and radius AB, describe arcs cutting each other at C.
Page 209 - ... possible ways to define the circumference of a circle. Statically, the circumference of a circle can be defined as the locus of all points in a plane a given distance from some point in the plane which we designate as the center. On the other hand, we could define the circumference kinematically as the curve generated by a point moving in a plane in such a way that it is always the same distance from some point in the plane designated as the center and it returns to the position of departure....
Page 212 - One of the conic sections, being a curve formed by the intersection of the surface of a cone with a plane parallel to one of its sides.
Page 229 - Find the length of the arc of a circle whose radius is 7.5 inches and the number of degrees subtended by the arc is 67° 15'.
Page 217 - Thus when it is said that the sum of the three angles of any triangle is equal to two right angles, this is a theorem, the truth of which is demonstrated by Geometry.