Trolley pole
Trolley poles are usually tapered cylindrical poles of wood or metal, used to transfer electricity from a "live" overhead wire to the control and propulsion equipment of a trolley car, tram or trolley bus. This system of current collection was an invention of Frank J. Sprague.
Related Topics:
Wood - Metal - Electricity - Trolley car - Tram - Trolley bus - Frank J. Sprague
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~ Table of Content ~
| ► | Introduction |
| ► | Origin of the term |
| ► | Description of the device |
| ► | Single and double pole usage |
| ► | Decline in usage |
| ► | See also |
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