Trolley pole
A trolley pole is a tapered cylindrical pole of wood or metal, used to transfer electricity from a "live" overhead wire to the control and propulsion equipment of a tram or trolley bus. The use of overhead wire in a railway electrification system is said to be the 1880 invention of Frank J. Sprague.[1]
Trolley Pole Media
Trolley pole on a Toronto streetcar, tipped with a trolley shoe
Machining spare trolley pole wheels
Modern trolley poles as installed on Vancouver's low-floor trolley buses
Trolley retrievers on the back of a 1949 trolleybus
Pantograph(left) and trolley pole in use on Queens Quay West, Toronto
Overhead over a switch in Toronto: Two runners for pantographs flank the trolley pole frog.
Classic PCC streetcars with trolley poles are still used in Boston
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Related pages
References
- ↑ Dr. Romin Koebel. Boston Transit Milestones. MIT Open Courseware (2005). Retrieved 2006-10-24.
