NERVOUS DISCHARGES 



27 



trie transmitters and with electro magnets controlling the slide 

 valve of the hydraulic cylinder. 



Figure 4 shows the construction of a coupling gang which is 

 an appliance for working groups of transmitters in combination. 

 In this particular coupling gang there are 5 transmitters operated 

 by two key rods. Each key rod opens 3 transmitters. When a 

 key rod is moved downward the motion is communicated through 

 the connecting bell-cranks to the spur rods which move horizon- 



Si 



115- 



121 



CL 



121 



Bh 



122 



122 



CL 



CL 



S2 



123 



117 



"} 



CL 



116 

 II7n 



120 



Q. 



119 



120- 



CL 



we/ 



120' 



CL 



118' 



123 



Figure 4. Side view of a coupling gang for 5 transmitters. 



tally. Spur rod 19 for transmitter S6n is moved by either key 

 rod by means of slotted holes for the bell-crank pins. Each 

 spur rod pushes against and works the spur valve of a trans- 

 mitter. 



It is evident that a coupling gang on this order may be used 

 to control all the transmitters of a given stream meter. Or a 

 coupling gang may be used to co-ordinate the movements of 

 several hydraulic cylinders through their respective transmit- 

 ters and' stream meters. 



