Junk 12, 1SS5.] 



♦ KNOWLEDGE ♦ 



499 



A month's turnout in this department comprises upwards 

 of 300,000 jewels, the work of u\">0 employes. 



In the pinion department (Fis; 5) are also several inte- 

 resting operations, some of which may be studied at the 



The first tool then cuts this pinion off and commences 

 ancitliiT :is before. An arm passes over, seizes the partly- 

 made pinion, carries it over, and places it in position for 

 the pivot at the other end to be turned down by a tool 



Exhibition. The wire is there seen ia 18 in. lengths. One 

 of these lengths Ls inserted in an automatic lathe for 

 roughing the pinions into shape. The wire is urged through 

 a hollow mandril, and as it revolves it is brought into 

 contact with a stationary tool with a double-cutting edge, so 



somewhat similar to the others. It is then ejected into a 

 receptacle, whence it is taken to another lathe and reduced 

 automatically to exact dimensions. The ingenuity involved 

 in this machine is simply marvellous. When it is sta- 

 tionary, the pinion is held but loosely, but when at work. 



shaped as to cut off the previously-turned pinion and 

 at the same time to commence turning down the staff 

 of another pinion, which latter labour is completed on 

 the wire moving ^forward a little, by another tool. 



it is perfectly rigid. After this, the pinion is placed in 

 an automatic pinion leaf-cutting machine, where there 

 are three little circular tools, each of which approaches 

 the work in turn, and then commences to revolve rapidly. 



