Round Type polyphase (1899-1903)	Back	Up	Next
After Shallenberger's and Thomson's (GE) attempts at a workable polyphase meter, an engineer at Westinghouse (Paul McGahan) devised this polyphase meter which was simply two singlephase Round Type meters in a tall case with a common shaft and register. The terminals for this meter were on the back, at the top and bottom.
Westinghouse Handbook on Watthour Meters