![Burrito Justice on Twitter: "just noticed this trolley pole guide on Mission near 30th — assuming it's where a bus can switch from battery to electric? also didn't realize that “trolley” refers Burrito Justice on Twitter: "just noticed this trolley pole guide on Mission near 30th — assuming it's where a bus can switch from battery to electric? also didn't realize that “trolley” refers](https://pbs.twimg.com/media/ERb-tC3VUAI947F.jpg)
Burrito Justice on Twitter: "just noticed this trolley pole guide on Mission near 30th — assuming it's where a bus can switch from battery to electric? also didn't realize that “trolley” refers
![Trolleyville School - OPERATIONAL TROLLEY POLES FOR HO SCALE MODEL ELECTRIC STREETCARS AND INTERURBAN VEHICLES Trolleyville School - OPERATIONAL TROLLEY POLES FOR HO SCALE MODEL ELECTRIC STREETCARS AND INTERURBAN VEHICLES](https://www.trolleyville.com/tv/school/operational_trolley_poles/images/form11.jpg)
Trolleyville School - OPERATIONAL TROLLEY POLES FOR HO SCALE MODEL ELECTRIC STREETCARS AND INTERURBAN VEHICLES
![The Street railway journal . BRACKET-HANGER FOR TWO-WIRE SYSTEM. FIG. 7.—BRIDGING GAPS AT CROSS-OVERS Fir,. 8.—GUIDING TROLLEY WHEEL FIG 3.—FLAN OF THREE-WIRE SYSTEM FOR UNDER-RUNNING TROLLEY LINES ACROSS GAPS trolley having The Street railway journal . BRACKET-HANGER FOR TWO-WIRE SYSTEM. FIG. 7.—BRIDGING GAPS AT CROSS-OVERS Fir,. 8.—GUIDING TROLLEY WHEEL FIG 3.—FLAN OF THREE-WIRE SYSTEM FOR UNDER-RUNNING TROLLEY LINES ACROSS GAPS trolley having](https://c8.alamy.com/comp/2CPW0J8/the-street-railway-journal-bracket-hanger-for-two-wire-system-fig-7bridging-gaps-at-cross-overs-fir-8guiding-trolley-wheel-fig-3flan-of-three-wire-system-for-under-running-trolley-lines-across-gaps-trolley-having-two-horizontally-disposed-trolley-wheels-a-aas-shown-diagrammatically-in-figs-i-and-2-that-are-held-incontact-with-the-feed-and-return-trolley-wires-b-c-by-thelateral-separating-pull-exerted-by-the-insulated-spring-e-at-tached-to-the-trolley-pole-bases-the-trolley-poles-are-pivotallymounted-to-permit-the-coach-to-move-freely-from-one-side-ofthe-street-to-the-ot-2CPW0J8.jpg)