PC PASSENGER-BRAKE EQUIPMENT 295 



to the reduction-limiting chamber Y. Port x leads to cham- 

 ber K, the large end of the service-reservoir charging valve; 

 port y, to chamber E of the release slide-valve chamber; port /, 

 to chamber C, the application chamber, and the front of 

 application piston; port c', to the emergency reservoir; port/, 

 to the pressure chamber Z; and port t, to chamber F of the 

 small equalizing piston. The slotted tail-port in the end of 

 the valve is shown at d. 



The equalizing slide valve is shown in Fig. 11, (a) being a view 

 of the face of the valve and (b) a view of the top of the valve. 



PIG. 13 



There are so many ports in this valve and they are so inter- 

 twined that it is impossible to make one illustration that will 

 show the relations of all the ports. The views in Fig. 11, there- 

 fore, will be used to show the exact relation of the ports on the 

 two faces of the slide valve, and those in Fig. 12, to show the 

 ports that connect with each other and at the same time show 

 how they are situated in the valve. Fig. 1 2 (a) shows how the 

 ports b, c', d, and z pass from the lower to the upper face of 

 the valve without connecting with any other port or passage. 



