4. Railway switches and signals
  5. Electric automatic highway signals, mine doors, and gates
  6. Car-actuated controller
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Railroad crossing arm breakaway connector

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

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Railroad signal system

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

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Railway gate system

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

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Road-rail shunt

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

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