. The Street railway journal . e use of smokers. The 27-E-1 trucks havea wheel base of 6 ft., axles $y2 in. in diameter and 33-in. the cars are equipped with four 55-hp motors each. Weightof a straight passenger car, trucks and motors is about 43,000lbs,, and of a combination car is about 46,000 lbs. BALL-BEARING JACK As implied by its name, ball-bearings are extensively used inthis jack to overcome friction. The weight rests entirely onthe balls. Ball bearings are also used in each end of the wormscrew to catch the thrust in raising and lowering loads. Tofurther reduce friction vas
. The Street railway journal . e use of smokers. The 27-E-1 trucks havea wheel base of 6 ft., axles $y2 in. in diameter and 33-in. the cars are equipped with four 55-hp motors each. Weightof a straight passenger car, trucks and motors is about 43,000lbs,, and of a combination car is about 46,000 lbs. BALL-BEARING JACK As implied by its name, ball-bearings are extensively used inthis jack to overcome friction. The weight rests entirely onthe balls. Ball bearings are also used in each end of the wormscrew to catch the thrust in raising and lowering loads. Tofurther reduce friction vaseline is used for lubrication. Thisis kept in an automatic grease cup, held in place at the bottomof the jack by a set screw. The post can be quickly screwed up to the load by hand,thus saving time, because with other jacks it is necessary toturn the lever until the top of the post reaches the load. An-other time-saving feature of this jack is that as soon as theload is released the post goes down automatically to its original. PASSENGER CAR FOR JAMESTOWN position. Through the use of interchangeable posts and gearsthree speeds are obtainable—slow or two revolutions of thegear to the inch; medium or one revolution to the inch; fast orone revolution to 2 ins. The mechanism of the jack is very simple and durable. Thegear is made of Coe bronze, which is almost frictionless, andthe screw and worm are of cold-rolled steel. All parts areinterchangeable, and the cost of maintenance is said to be jack can be used in very close quarters, thereby insuringthe lifting of the weight in any place under which the head ofthe jack can be placed. It is to be hoped that there may be fewer interurban roadsbuilt which deserve the appellation bestowed upon them by awell-known engineer—monuments of efficient salesmanship. October 3, 1903.] STREET RAILWAY JOURNAL 671 THE CHICAGO UNION TRACTION COMPANYS NEW CARS The order for 100 new cars, which the receivers of theChicago Union Traction C
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
