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 .. . ri^ -»o parting to the center of the pattern without theuse of the trowel. 78 PATTERN MAKING To make this pattern it is best to lay out on aplain board the design or outline, as shown inFig. 41, dividing the rim into any number ofequal parts. In this case there are six equalparts. One of these parts is a suitable patternfrom whic
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 .. . ri^ -»o parting to the center of the pattern without theuse of the trowel. 78 PATTERN MAKING To make this pattern it is best to lay out on aplain board the design or outline, as shown inFig. 41, dividing the rim into any number ofequal parts. In this case there are six equalparts. One of these parts is a suitable patternfrom which to saw out the rim, allowing a little extra woodon both sidesfor turningup. Hav-ing roughlysawed outthe parts ofthe rim, fitthe jointstogether, onthe drawingor outline, taking care that the parts of the rim are so fittedtogether that they will describe in the rough asnearly as possible a perfect circle. Then gluethe second layer on to the first, breaking jointswith the sections, so as to form a rough ring, asshown in Fig. 42. Next secure this preparedring to the face plate in proper position so that. Tis ^f AND FOUNDRY PRACTICE 79 the tool will cut as nearly even all around as pos-sible and turn up the ring so that it will be incross-section, as shown in Fig. 43, using a thinwood or metal pattern to secure the desiredshape. (See Fig. 43.) Now, with the turningchisel, mark the face plate lightly as a guide, in
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicagofjdrakeco
