﻿642 
  

  

  Messrs. 
  E. 
  Bellini 
  and 
  A. 
  Tosi 
  

  

  on 
  a 
  

  

  station, 
  and 
  at 
  180° 
  from 
  this. 
  The 
  receiving 
  radiogonio- 
  

   meter 
  is 
  similar 
  in 
  construction 
  to 
  that 
  for 
  the 
  transmission. 
  

   The 
  fixed 
  windings 
  m, 
  n 
  (fig. 
  D) 
  are 
  connected 
  to 
  their 
  

   respective 
  aerial 
  circuits. 
  The 
  movable 
  winding 
  s 
  x 
  is 
  suitably 
  

   connected 
  up 
  to 
  the 
  detector, 
  through 
  two 
  brushes. 
  

  

  Fig. 
  D. 
  

  

  A* 
  

  

  Detector 
  

  

  The 
  oscillatory 
  currents 
  set 
  up 
  in 
  the 
  two 
  aerials, 
  when 
  

   these 
  latter 
  are 
  subjected 
  to 
  the 
  influence 
  of 
  an 
  electro- 
  

   magnetic 
  field, 
  create, 
  in 
  the 
  interior 
  of 
  the 
  fixed 
  windings, 
  

   a 
  resultant 
  magnetic 
  field 
  of 
  an 
  intensity 
  which 
  is 
  inde- 
  

   pendent 
  of 
  the 
  direction 
  of 
  the 
  transmitting 
  station. 
  When, 
  

   therefore, 
  the 
  movable 
  winding 
  is 
  perpendicular 
  to 
  this 
  re- 
  

   sultant 
  field, 
  that 
  is, 
  its 
  central 
  plane 
  is 
  oriented 
  towards 
  the 
  

   transmitting 
  station, 
  the 
  effect 
  on 
  the 
  detector 
  will 
  be 
  a 
  

   maximum. 
  In 
  this 
  position 
  the 
  reception 
  is 
  practically 
  

   limited 
  to 
  the 
  plane 
  containing 
  the 
  transmitting 
  station, 
  and 
  

   the 
  pointer 
  indicates 
  on 
  the 
  dial 
  the 
  direction 
  of 
  this 
  plane. 
  

   One 
  is, 
  however, 
  not 
  able 
  to 
  determine 
  ivliich 
  side 
  of 
  the 
  

   receiving 
  station 
  the 
  transmitting 
  station 
  is 
  located. 
  

  

  The 
  receiving 
  radiogoniometer 
  is 
  provided 
  with 
  special 
  

   contacts 
  for 
  tuning 
  the 
  fixed 
  windings 
  to 
  the 
  lengths 
  of 
  the 
  

   waves 
  to 
  be 
  received, 
  which 
  is 
  effected 
  by 
  varying 
  the 
  number 
  

  

  