24 



SPLINTER-BAR 



CH. Ill 



bar but little altered, the advantage of a moveable 

 swingle-tree is obtained. 



The general arrangement is seen in Fig. 8. The 

 details, with dimensions which should be somewhat 



X 



B 



M 



A 



D 



Q 



M 



Fig. 8. 



closely adhered to, are shown in Fig. 9, drawn to 

 one-quarter of the full size. The bolt which passes 

 through the splinter-bar should be not less than 

 three-quarters of an inch in diameter, the swelled 

 portion being welded upon it. It should be carefully 



turned in the lathe to the proper 

 fit, and the corners between the 

 swelled portion and the pin must be 

 left full, and not cut in sharply, since 

 it is here that the pin is most liable 

 to break. After the nut on the bot- 

 tom of the pin is screwed up, the 

 end of the pin should be hammered 

 over so that the nut cannot come 

 off; the top end of the bolt should 

 have a split pin passing through it over the nut. 

 The shackle, which is bolted to the back of the 

 splinter-bar, must be strong and of tough iron, be- 

 cause, should the pin break, all the strain will come 

 upon the shackle. Of course the objection may be 

 made to this arrangement that every additional 



Fig. 9. 



