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Westinghouse Round-type electric meter, 1904

Westinghouse Round-type electric meter, 1904

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Oliver Shallenberger had developed an integrating-type watt-hour meter for Westinghouse that fit well with the industry’s need for a watt-hour meter, but it was heavy and expensive.

H. P. Davis and Frank Conrad developed this light-weight and less expensive round-type meter.

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