526 



AN ELECTRIC VEHICLE CHARGING PLANT. 



accomplished as regards the ammeter by using double-thrower 

 lever switches, and. as regards the voltmeter, by means of poten- 

 tial plugs and receptacles. These circuit instruments enable the 

 operator to ascertain at any time the voltage and current supplied 

 to any battery under charge. There is a series rheostat for each 

 circuit for regulating the charging rate. These are easily manipu- 

 lated by a rod from the floor level. ... 



Plate 19a shows the charging circuits fastened to the garage 

 ceiling, and also a number of vehicles on charge. 



13 t p 460 V i .V. a rt r wi rn 



tNOCQNlACr 4.\D3tuO T I. 



WIT ft L V ffCi.CAS£ AfiD CPCCAt 

 GRIDS ___^_ 



SALANCfff SET 4 RCn f5f1/? aOOR.PM /15V USA t3HW-900RPM. 



Fig. 1. 



The advantage of using a balancer set is that its units need 

 be no larger than the requirements of the largest vehicle to be 

 charged. That being so, it is exceedingly efficient in operation. 



Plate i()b shows an electrically-operated still (also of local 

 design and manufacture) for producing the water necessary for 

 the storage batteries. It is equipped with eight i.ooo-watt heat- 

 ing units. These are wired in 'four sets of two in series on 460 

 volts, each pair being controlled by a snap switch. The capacity 

 is about two gallons per hour, and after once being switched on 

 and the inlet cock adjusted to give the best relation of cooling 

 water to the product, it requires no further attention. The still 

 is of sheet copper, thoroughly tinned on all surfaces in contact 

 with the water. Its operation has been highly satisfactory. 



