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 .. . 7^7^ J30 68 PATTERN MAKING half circular portion of the pattern c, Fig. only difficulty to be met with in makingthis pattern is the miter joint ^, which isfound by the intersection of parallel lines of equaldistance from each other on the straight side,with similar circular lines struck from the center .^^^^^^^^;^^^^^;^^^^
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 .. . 7^7^ J30 68 PATTERN MAKING half circular portion of the pattern c, Fig. only difficulty to be met with in makingthis pattern is the miter joint ^, which isfound by the intersection of parallel lines of equaldistance from each other on the straight side,with similar circular lines struck from the center .^^^^^^^^;^^^^^;^^^^^<^^. Ti^ 31 of the circular portion of the work. This is thecommon rule for mitering straight and curvedmouldings. Or the joint can be coped together,the circular part of the core box can be turnedinto the face of a plank of suitable size, which,when cut across the line of its diameter, formsthe circular part of the core box. The re- AND FOUNDRY PRACTICE 69 mainder will have to be carved out with gougesand the finished core box made as shown in It will be observed that in this pattern afull core box is required, that is to say, two halfcore boxes,made right andleft, and dow-eled together. The nextpattern treatedis that of adouble - flangedwheel, for useon an overheadtraveling toFig. 34, a and b, which shows an elevation and cross-section,will afford a clear idea of this wheel. There are so many ways to cast this wheelthat it makes a nice illustration. The first thingto be considered is how to get it out of the sand,which problem we think is best solved in themanner
Size: 1935px × 1292px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublisherchicagofjdrakeco
