Trans. E. S. C, 1891. 



D. H. keel; 

 INTERCHANGEABLE WAY-WIRE 



MAIN LINE. 





<#)^ 



TERMINAL OFFICE. 





PLAN OF CIRCUITS SHOWING METHOD OF OPERATION 



The local circuits, dischai^e plates, and the adjuncts of the polarized 

 revolved synchronously by motors governed by the receivers Ra, Rb, w 

 The main line currents are presented at both ends concurrently ; + at c 

 receivers respond to the alternations. The keys, upraised and depressed 

 of the current in their respective circuits. The movements of a given key 

 in its circuit. 



To illustrate Mr. F. N. Gisborne's Paper on 



Sec. III. Plate I. 



:y's 

 MULTIPLEX SYSTEM 



receivers, are here omitted. ■ The arms A, A, A, A, are 

 hich are alternately actuated at every half revolution 

 me end and — at the other, alternately. Normally, the 

 operate to interrupt the path of one phase or the other 

 are therefore reproduced in all of the receivers included 



Multiplex Telegraphy. 



