Popular Sricficc Motithhi 



An Adjustable Radius Turning Tool 

 for Lathes 



EVERY mechanic has at some time 

 experienced trouble in making a true 

 radius on a lathe. The tool illustrated, 

 was designed for this special work and 



A revolving turret on the tool which is con- 

 trolled by a worm on the rod with crank 



has proven a success, especially for tool 

 room mechanics. The holder is made to 

 receive the small high speed steel cutter 

 in a revolving turret controlled by a worm 

 on a shaft through the arm or tool post 

 end of the holder. The shaft is turned 

 by a small crank on the back end. 



With this tool the stock may be roughed 

 out, then turned to the radius for which 

 it is set. The setting of the small tool in 

 the turret determines the radius to be 

 turned. This may be done by measuring 

 from the tool point to the curved surface 

 of the turret. Its diameter having been 

 determined the exact radius may be easily 

 obtained. — H, E. Anderson. 



Protecting the Soles of Shoes with 

 Ordinary Varnish 



WITH the ever-increasing cost of foot- 

 wear, it behooves the user to get as 

 much service from his shoes as possible. 

 To do this the leather must be protected. 

 The soles are the first to suffer, but if the 

 uppers are not impervious to water they 

 wull get damp even when the walks are not 

 very wet, and will eventually crack. 



Chamber's Journal is responsible for 

 an article describing how to apply an 

 inferior type of cop:.! varnish to the soles 

 to keep out the water. 



The leather must be quite dry and bare 

 when the varnish is applied. New bo )ts 

 should therefore be worn for a day before 

 treatment, so as to remove the black var- 

 nish from the soles. The operation is car- 

 ried out by brushing on the varnish at in- 

 tervals of half an hour, until the leather 



617 



will not soak up any more. This condi- 

 tion may be recognized from the surface 

 remaining shiny all over, instead of be- 

 coming dull in places. After being hung 

 up to dry for about twelve hours the boots 

 are ready for wear. 



A Metal Clip Formed with One Die 

 and One Operation 



DUPLICATE parts are quickly made 

 in a punch press by several opera- 

 tions, but how many persons would think 

 that a piece like the one shown in Fig. 1 

 could be made with one tool in one 

 operation? Such a shaped piece of metal 

 is used as a catch on breast pins, class pins 

 and similar jewelry. The clip is cut and 

 formed from a strip of metal as shown in 

 Fig. 2. 



The punch and die for punching and 

 shaping the metal are shown in Fig. 3. 

 The die consists of a piece of steel with a 

 rectangular hole cut in it the width and 

 length necessary to bend the metal in 

 the shape shown. The punch has a 



o 



ng2 



Fig.i 



The shape of the 

 tool forms the 

 clip as it is cut 

 from the metal 



wedge-shaped point A which punctures 

 the metal first, cutting along the line F-G 

 in Fig. 2. Then as the surface A-B, Fig. 

 3, enters the metal, it cuts along F-I and 

 G-H, Fig. 2. As the punch cuts these 

 edges, the metal rolls into a curve. The 

 part D-E on the punch. Fig. 3, cuts the 

 metal along the lines J- K, K-M and M-L 

 and bends it in the line J-L, Fig. 2, then 

 when the part B-C, Fig. 3, reaches the 

 metal it cuts out the remainder, leaving 

 the holes N-O-P-Q, Fig. 2, in the metal, 



