{"version":"1.0","type":"link","title":"Trolley pole - Newikis","description":"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.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/f/f2/Trolley_Wheel.jpg/1200px-Trolley_Wheel.jpg","thumbnail_width":1200,"thumbnail_height":800}