- Item 74517 - Westinghouse Round-type electric meter, 1904
- Contributed by Maine Historical Society
- Item 74517
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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.Show Details
H. P. Davis and Frank Conrad developed this light-weight and less expensive round-type meter.