Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . urther illustrated andexplained by the use of dotted lines, figures, let-ters, etc. For certain purposes mechanical draw-ings are sometimes made in perspective; but forpattern shop uses perspective effect is neveremployed. Two or more views of any object Fig. 00 treated should be given in a mechanical art of drawing i
Pattern making and foundry practice; a plain statement of the methods of wood pattern making, as practiced in modern pattern shops, with complete instructions for sweep work and notes on foundry practice, together with numerous drawings taken from actual patterns .. . urther illustrated andexplained by the use of dotted lines, figures, let-ters, etc. For certain purposes mechanical draw-ings are sometimes made in perspective; but forpattern shop uses perspective effect is neveremployed. Two or more views of any object Fig. 00 treated should be given in a mechanical art of drawing in a very high state of prac-tical usefulness is now taught by several cor-respondence schools, and it be readilyacquired by any ambitious person. Ordinary drawings for most patterns may bemade with a lead pencil, a pair of dividers with 40 PATTERN MAKING a pencil point, a pair of beam compasses ortrammel points and a steel square. Many oldpattern makers use no other tools and maketheir drawings on the surface of a smooth plank,which only needs planing off to be ready for thenext job. A much better way, however, for animportant job is to make the drawing on heavymanila paper, which can be filed away for futurereference. Where paper drawino-s are to be used. ris tt it will be found very convenient to have a fewregular drawing instruments. The drawingboard should be of any convenient size andmade of well-seasoned, clear, soft pine, perfectlystraight and square, with hardwood cleatsdriven snugly into dovetail gains or groovesacross the back of the board, as shown in The T-square is used for drawing parallellines, either way, across the board, and is made AND FOUNDRY PRACTICE 41 of any hard, straight-grained wood. Pear woodis excellent for this purpose; mahogany, cherryand maple also being used. A most excellentT-square is made for the trade with a trans-parent celluloid edge. A proper T-square forpattern shop use should have a blade at least y^rT^ three feet long, SX^y
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicagofjdrakeco
