Type DC, Plain and Sub A (1906 to 1912) Up
Up
Next
Next
 
Westinghouse was the last company to enter the market for DC meters and may only have done so to remain competitive. The first version of their Type DC (Direct Current) meter was similar in design to what GE and Duncan were building, except that the internal components were much closer together. The second version of the type DC meter (Sub A) was a different design with the brake magnets on top and a window for the disk. There is also an earlier version of the DC that was produced in a case similar to the early polyphase Type C meter, but I have no further info at this time.
 
Type DC, Plain
Westinghouse Handbook on Watthour Meters
Type DC, Sub A
Westinghouse Handbook on Watthour Meters