History of A-C wave Form, Its Determination and Standardization

  title={History of A-C wave Form, Its Determination and Standardization},
  author={Frederick D. Bedell},
  journal={Transactions of the American Institute of Electrical Engineers},
  • F. Bedell
  • Published 1 December 1942
  • Physics
  • Transactions of the American Institute of Electrical Engineers
With the birth of the transformer and the first distribution of alternating currents, wave form assumed interest, and methods were developed for its determination, chiefly the point-by-point method of instantaneous contact, mechanical oscillograph, cathode-ray oscillograph, and the oscilloscope with stabilized time axis. The point-by-point method, by which were made the first major contributions, is now practically superseded by oscillograph and oscilloscope, each finding increasing use in its… 
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