L06 



MACH1M PKA'.viMi AND DESIGN 



views a few of the chief dimensions are marked. The details, fully 

 dimensioned, are shown separately in figs. 89, 90, and 91. 



Explain clearly how the centre is moved backwards and for 

 wards, and also how the spindle containing it is locked when it is 

 not required to move. 



Draw, half-size, the views shown in fig. 88, and from the left- 

 hand view project a plan. Draw also the detail of the locking 

 arrangement shown in fig. 89. 



XVIII. MISCELLANEOUS EXERCISES /rom Examina- 

 tion Papers set by the Department of Science and Art. 

 EXERCISE 90 : Hooke's Coupling. Draw the three views shown 

 (fig. 92), adding any omitted lines where the views are iii>ni|>K t< . 

 Scale 3 inches to a foot. 



Pio. tt. 



