ARMATURE LAMINATIONS 39 



shear as that illustrated in Fig. 24. This machine is by Messrs 

 Daniel Smith & Co., 1 and will divide off annular rings of any 

 width up to 330 mm. (13 in.), and is capable of cutting blanks and 

 rings up to 1520 mm. (60 in.) in diameter in all thicknesses up to 

 1*65 mm. diameter (No. 16 B.W.G.). The machine consists of a 

 framework, at one end of which revolving disc cutters are placed, 

 which are driven by gearing, as shown. The cutters are not 

 placed in the same plane, but are inclined to each other at a con- 

 siderable angle, their spindles being connected through bevel 

 gearings. The top beam gives stiffness, and on it there is placed 

 an instantaneous eccentric lever "pallet grip, by means of which 



FIG. 25. Geared Rotary Shears for Armature Discs and Rings. 



blanks without central holes may be formed ; while, in the saddle, 

 which travels on the lower slide, there is a rotary stud for taking 

 discs which have been previously pierced in a press. The saddle 

 is moved by means of the hand-wheel shown in front of the bed ; 

 and in the top beam there is a longitudinal slot which allows the 

 gripping pallets to readily follow the saddle. 



A less elaborate type of circular shear for power drive, as 

 supplied by Messrs Neville Bros., is shown in Fig. 25; and a 

 machine to be manually operated and only suitable for small discs, 

 in Fig. 26. This latter machine is by the E. W. Bliss Co., as is 

 also the larger machine for power drive shown in Fig. 27. 



1 The description of this machine is taken from p. 117 of Engineering, for 

 27th January 1905. 



