Recording devices

  title={Recording devices},
  author={C. Steinmetz},
  journal={Proceedings of the American Institute of Electrical Engineers},
  • C. Steinmetz
  • Proceedings of the American Institute of Electrical Engineers
The author calls attention to the importance of keeping records in electrical systems and points out that proper records can be secured only by automatic recording devices largely because of the uncertainty of the personal element in times of accident or stress. The three types of recording devices in general use are those having a revolving disk, those using an endless tape or photo-film, and multi-recording device on which no record is made of normal operations and on which the record sheet… Expand