4. Railway switches and signals
  5. Block-signal systems
  6. Automatic

Harry C. Nagel

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Electronic overload protection circuit

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
Patent

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Power transfer apparatus for railroad track circuits

Railway switches and signals – Block-signal systems – Automatic
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Pulse code system for railroad track circuits

Railway switches and signals – Block-signal systems – Automatic
Patent

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Vital safety monitoring circuit

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
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Profile ID: LFUS-PAI-P-632051

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