. Electric railway journal . as 1722 trips were made over the line. In the four-teen months of service the only failures were twentybroken carbon contacts caused by the impact of the arma-tures. After considerable experimenting Le Carbonebrushes were adopted, as they were found in perfect condi-tion after a test of more than 300,000 contacts. As the result of this test the Lewisburg & Tyrone branchof the Pennsylvania Railroad, 10 miles long, was equippedwith the system early in 1911 and has been in operationfor the last six months. The contact boxes used in thisinstallation are made of reinfor
. Electric railway journal . as 1722 trips were made over the line. In the four-teen months of service the only failures were twentybroken carbon contacts caused by the impact of the arma-tures. After considerable experimenting Le Carbonebrushes were adopted, as they were found in perfect condi-tion after a test of more than 300,000 contacts. As the result of this test the Lewisburg & Tyrone branchof the Pennsylvania Railroad, 10 miles long, was equippedwith the system early in 1911 and has been in operationfor the last six months. The contact boxes used in thisinstallation are made of reinforced concrete molded underpressure. The lid is made of cast iron with a brass con-tact piece inserted on the top surface. The boxes can bemade for less than $3 each. These boxes are bolted ontop of the ties between the rails at intervals of 10 ft. andare connected to a copper strand, paper-insulated, lead-covered cable inclosed in a 1^4-in. iron pipe conduit. Thecar used on this branch is equipped with the type of magnet. Arrangement of Wooden Guard Rails at Switch bars and collector shoe described above. It is a single-truck car weighing 8 tons and equipped with two GE-1000motors. A J^-kw hand generator is mounted on each plat-form of the car to enable the motorman to energize anauxiliary magnet in order to operate the contact switchesand pick up the current after it has been temporarily cutoff at the power house. The Lewisburg & Tyrone branch has six switches leadinginto sidings over which the car must pass. In order toprevent the loss of current while passing over the lead railof a switch an auxiliary stud is placed in the center of thetrack between the adjacent contact boxes. This stud isenergized automatically when the car passes ever the switchby means of a solenoid switch mounted in a box on ashort post at one side of the track. To preventa short circuit between the collector shoe andthe lead rail two wooden guard rails are construction is shown in one of the ac
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
