Identifier: mechanicaldrawin04leed (find matches)
Title: Mechanical drawing for trade schools
Year: 1909 (1900s)
Authors: Leeds, Charles Carley, 1870- (from old catalog)
Subjects: Mechanical drawing
Publisher: New York, D. Van Nostrand company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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sshown, as this is sufficient and much time and labor are saved thereby. When building engine-type generators, it is often customary forone firm to build the engine and another firm to build the generator.The builders of the engine usually furnish the shaft, the sizes of whichare indicated in the stock order furnished the generator builders. For the con^•enience of the student, he may show bores E, F, andG to scale for a diameter of 6 inches, and the keyway may be shownwith W equal to i^ inches and H equal to ^ inch. The dovetail surface of the spider is turned to suit a gauge ortemplet made to suit this particular size and type of machine. \\Tien laying out this drawing, study for yourself the relation be-tween the spider and the parts detailed on the previous lessons, asthis information will be of value in the following lesson. Lay this lesson out half-size on an A sheet (22X3o), as it is apoor plan to make a drawing to a small scale when it means a sacrificeof clearness to do so.
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Top for §s1ijd IB holes equa/ly spaced Section A-B \ Core for 6 shaft For H&Wsee 5.0. Sec f ion C-D For bores E.FSGsee Stock Order CL^ss Indusfnat trade Machinist NAuc John W.Roberfs date Jan.B6-09. THE CARNEGIE TECHNICAL SCHOOLS PITTSBURGH, RA\. School of Appif£:i\mcES aind Joui^seyuen MECHANICAL. DRAWING Armature: Spider SCALE ji. Size DiVG. vo. C_I044- LESSON No. 50. COMMUTATOR ASSEMBLY.—On Drawings C-1041, C-1042,C-1043, and C-1044 are shown the main details of the commutatorfor an electric generator. From these drawings and the followinginformation it is expected that the student will lay out an assemblydrawing of the commutator. On this assembly drawing it is nesessary to show but one view—alengthwise sectional view similar to Section C-D on Drawing C-1044. The main purpose of these later assembly drawings given in thiscourse of lessons, aside from the general knowledge of the subjectnecessary in the drafting room, is to teach the student to think forhimself. To lay ou

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