

MA MINI: IKAWIN<; ANI M 



is necessary that tin- nuts should !>< turned toother. This is 

 (1-M i,- in a simple and ingenious manner. One-half of each 

 nut is provide*! with teeth. and these gear with a toothed 

 wheel vhieh has a rim only ; this rim is held up l.y a rinu' < '. 

 When one nut is turned, all the rest follow in diree 



tlOTL 



EXEK< tn <;; : ai.mii nm/.sv 



Ciflintlt-r i'.mjinr. The lower view in li^'. 04 is a half plan 

 looking npuards. and a half section of the u'land looking ilowi. 

 The upper view is a vertical section. Complete all these views and 

 add an elevation. Scale 8 inches to a 1 



Note. The large nuts, the wheel, the supporting ring, and small 

 gland are made of brass. 



JtiiHi-niiniH* n/Muffing-bofe* ami fi!.- 



fi = diameter of rod. 



//, = diameter of box (inside). 



/ = length of stuffing-box bush. 



/, = length of packing space. 



/, = length of gland. 



t = thickness of metal in stuffing- 



lK)X. 



r , = thickness of staffing box 



flange. 



f., - thickness of gland flange, 

 r, = thickness of bushes in box 



and gland. 



</ 2 = diameter of gland bolts. 

 n - number of bolt*. 



!! 



iii 



m 



us 





'1 he proportions of glands and .stutlin#-l>oxes vary consi- 

 d. ral.ly, but the above table represents average practice. 



EXKI n ' 7. -Make the necessary working drawings for a 

 gland and stuffing-box for a locomotive engine piston rod 2$ 

 inches in diameter, to the dimensions given in the table. 



