122 



PATTERN MAKING 



used in the tenon of the branch to assist in keeping it in place. 

 In all small and moderate-sized valves, the flanges are hex- 

 agonal in shape as shown in Figs. 218 arid 220. The core for a 

 globe valve is made in two parts, and the core box for each part 

 must be made in upper and lower half, making four parts to the 



Pig. 224. 

 Fig. 223. 



core box. This is necessary in 'order to allow for the removal of 

 the core from the boxes. The internal shape of the boxes are 

 difficult to illustrate on paper, but if the drawings given in Figs. 

 222 and 223 are carefully studied in connection with the sectional 

 views of the valve shown in Fig. 219 their shape and construction 

 should be readily understood. 



22.1. 



. 220. 



Three additional illustrations of thecoiv as made in these boxes 

 are shown in Figs. 224, 225 and 226. 



In Fig. 222 there arc two views of the box in which the upper 

 part (' of the core shown in Fig. 224 is made. This box separates 

 along the two lines marked "Joint" (Fig. 2'2'2) and, as will be 



