4. Railway switches and signals
  5. Electric automatic highway signals, mine doors, and gates
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Model train crossing gate

Railway switches and signals – Electric automatic highway signals – mine doors – and gates – Car-actuated controller
Patent

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Multi-frequency railroad grade crossing termination shunt assemb

Railway switches and signals – Electric automatic highway signals – mine doors – and gates – Car-actuated controller
Patent

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Multiplexing means for motion detectors at grade crossings

Railway switches and signals – Electric automatic highway signals – mine doors – and gates – Normally open track circuit
Patent

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