. The Street railway journal . olted-inH pole construction has been adopted instead of the ^ cast-in poles, and many other features have beenmore fully developed. The above gives a general description of thevarious types of motors gotten out up until about1897, and covers only those which were given com-mercial tests. A number of experimental motors were built,especially about 1890-91, which were never put upon the mar-ket, and in some cases were simply built for obtaining cer-tain data. , About the time that the No. 1 motor was gotten out, sometests were made on driving street cars by means o
. The Street railway journal . olted-inH pole construction has been adopted instead of the ^ cast-in poles, and many other features have beenmore fully developed. The above gives a general description of thevarious types of motors gotten out up until about1897, and covers only those which were given com-mercial tests. A number of experimental motors were built,especially about 1890-91, which were never put upon the mar-ket, and in some cases were simply built for obtaining cer-tain data. , About the time that the No. 1 motor was gotten out, sometests were made on driving street cars by means of frictionwheels. A motor was built and placed upon a truck in theshop, for making such tests. This motor was of the consequent-pole type, similar to the well-known Weston type of machine,with four field coils and two consequent poles. The armaturewas geared to a countershaft, and to the countershaft was at-tached two friction rollers or wheels, which bore down uponthe car wheels, each roller lying between two car wheels. This. NO. 12-A ARMATURE construction was given certain shop tests, but was found to berather inflexible and was very noisy. It was decided that itwould not be a suitable article for commercial service, and wastherefore not given the outside tests. A series of tests was also made on the use of magnetic gear-ing. Grooved wheels were used, the grooves being in the shapeof Vs. By means of magnetizing coils on the axles or shaftsa magnetic field was set up between these driving gears. Testswere made to determine the power that could be transmitted bythis device, but it was found that it would be insufficient forthe torque which would be necessary for street car service. A considerable number of experiments were made with dif-ferent methods of street car regulation, such as commutatedfields, sectional field coils, etc. A series of tests was madewith commutated fields, three field coils being used in somewhatthe same manner as the Sprague system. This system of regu-
Size: 2632px × 949px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
