STEAM-WINDING DKUMS FOE PLOUGHING, ETC. 



125 



this is the main cause of the breakage of drum flanges and 

 of the wear of the cable, the strands of which overlap each 

 other, become tangled, and cause distortion, flattening, &c. 

 In the machines designed for medium-sized properties, where 

 the proprietor wishes to avoid complicated machinery, it is 

 difficult to provide drums with winding guides (costly and 

 cumbersome), such as those of Fowler and Howard ; but it 

 is always easy to attach that shown in Fig. 80, which costs 

 very little to keep in repair, as the part subject to most wear 

 is easily replaceable, and only costs 4s. lOd. 



j. hread,ed shaft and sliding rod 



Fig. 80. Winding Guide. 



The principal part of the mechanism of this winding guide 

 is a shaft V, round which two threads are cut in opposite 

 directions, and opposite each drum, one winding to the right, 

 the other to the left. Above the shaft, and parallel to it, 

 are two cylindrical rods G serving as guides to a sliding 

 frame M, carrying inside it two steel rollers RR and on the 

 upper part the brass collar K. This collar revolves freely 

 in a block E, through which the rods Gr pass, on which the 

 block slides. Therefore it plays the part of a nut, and moves 



6279. 





