656 



SUMMARY OF CURRENT RESEARCHES RELATING- TO 



slider-support. Instead of a backward and forward motion of the 

 knife, the author proposes a lateral movement (vide arrow x in figs. 

 155 and 156), in order to present to the object the parts of the razor 



6 



Fig. 154. 



previously unused. The indispensable pieces of construction are shown 

 in fig. 155. The rectangular plate A, with two fillets, R and R', along 

 its greatest sides, is pierced by a rectangular hole, whose longest axis 



Fig. 155. 



indicates the direction of the new lateral displacement, as shown by the 

 arrow x. Through this hole passes the stem V of the raising and 

 lowering gear, its head (as dotted) having a firm rest behind the plate 



