THE WOULD 'S ADVANCE 



381 



Views of the Exterior and Interior of the Inductive Tuner, showing the Location of the Different Parts. 



ing the same to the right. 



In Fig. 2 there is shown the front ele- 

 vation of the instrument drawn to scale. 

 It will be noted that the lower right hand 

 arm of the fixed tuner switch is made to 

 act as a pointer and lines are engraved 

 on the front of the case corresponding 

 to the different switch points. Adjacent 

 to these lines may be placed the call let- 

 ters of the different stations standardized 

 in the instrument, and thus it will be an 

 easy matter to pick out the tuner for any 

 particular station. 



Fig. 3 gives a side elevation of the 

 cabinet, showing the secondary control- 

 ling handle and the binding posts. 



Fig. 4 is a front elevation of the in- 

 strument with the front panel removed 

 to show the interior arrangement. Here 

 may be seen the receiving transformer 

 mounted in the front part of the cabinet 



and also the twelve fixed tuners in the 

 back of the same. The receiving trans- 

 former is mounted in an extremely sim- 

 ple though quite effective way. As will be 

 seen, the primary coil of the same is sup- 

 ported entirely upon the left-hand end of 

 the cabinet to which is screwed the 

 wooden disk fastened in that end of the 

 coil form. The secondary, as usual, 

 slides backward and forward upon two 

 metal rods which extend the full width 

 of the cabinet and at the left-hand or 

 primary end are supported in holes in 

 the primary coil disk above mentioned, 

 while at the right they are held in holes 

 in a small piece of wood provided for the 

 purpose and which is screwed to the 

 right-hand end of the cabinet. The sec- 

 ondary switch mounted on the end of 

 the secondary coil can also be seen, as 

 well as the rod at its center passing 



