. The Street railway journal . CROSS SECTION THROUGH CENTER OF BOLSTER FOLDING DOOR folding door (illustrated herewith) which has received much at-tention from car builders. The most ingenious part of the deviceis the slot which automatically controls the movement of thedoor in opening and closing. Mr. Duner makes four claims inhis letters patent, allof which have beengranted. The North-western Elevated, ofChicago, first usedtwo doors for oneyear, demonstratingbeyond question themerits of the inven-tion, and two subse-quent orders have been placed for twenty-fivecars and forty-five cars, respe
. The Street railway journal . CROSS SECTION THROUGH CENTER OF BOLSTER FOLDING DOOR folding door (illustrated herewith) which has received much at-tention from car builders. The most ingenious part of the deviceis the slot which automatically controls the movement of thedoor in opening and closing. Mr. Duner makes four claims inhis letters patent, allof which have beengranted. The North-western Elevated, ofChicago, first usedtwo doors for oneyear, demonstratingbeyond question themerits of the inven-tion, and two subse-quent orders have been placed for twenty-fivecars and forty-five cars, respectively. The new type of folding door is also in useon several other roads. Among them are theLake Street Elevated, which has placed a con-siderable number of these doors on its cars,and the Calumet Electric Street Railway Com-pany has made a contract to equip all of its carswith the Duner door. As shown by the illustration, the device is somade that, in opening and closing, a minimum. I. The journal boxes are packed with wool waste and oil afterthe Pennsylvania Central Railways formula, and guaranteed torun cool. Among the companies using these trucks is the Detroit Con-struction Company, the assistant general manager of which saysthat the trucks frequently run from 55 miles to 60 miles per hour,and that they are giving excellent satisfaction under the cars onhis road. of platform room is required. There are very few, if any, roads inthis country which do not find it impossible to keep their platformsclear of passengers at all times. The feature which attracts therailway man most in the construction of the Duner door is, there-fore, the ease with which it can be opened and closed on crowdedplatforms, but the handsome appearance, excellent workmanship,practical design and durability have proved important factors to-ward its success. September 7, 1901.] STREET RAILWAY JOURNAL. 299 Double-Truck Rotary Snow Plow The Manhattan Railway Car Heaters Last month a view was p
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
