KENNELLY AND PIERCE. 



TELEPHONE RECEIVERS. 



121 



nals, the damped resistance as a function of the angular velocity is 

 expressible by the equation 



i? = 71 + 0.0234 CO — 0.456 X lO-^co^ ohms, (1) 



in which R is the damped resistance, and co is the angular velocity in 

 radians per second. 



TABLE IV. 



Resistance and Reactance of Watch-case Receiver, at Different 

 Freqifencies, with 0.3 Volt at Terminals of Receiver. 



For the bipolar "watch-case," at 20° C, and with 0.3 volts applied, 



R = 81.4 -f 0.0214 CO — 0.505 X 10-V ohms. (2) 



In these equations, 71 and SI. 4 are the respective resistances of the 

 two instruments to steady currents; the other constants of each 



