trolley wheel वाक्य
उदाहरण वाक्य
मोबाइल
- Curiously, Philadelphia did not convert its trolley wheels on its remaining streetcars until 1978.
- For this reason, the pole was tipped with a metal plate rather than a shoe or trolley wheel.
- Although a streetcar with a trolley wheel may evoke an antique look, the trolley shoe is modern and more practical as well as economical.
- In 2012, the museum adopted a cat, called Frank the Trolley Cat, after Frank J . Sprague, the inventor of the trolley wheel.
- Doc Brown could disconnect a section of overhead wire from the system and connect it to the clock tower, and fit the pole on the DeLorean with a trolley wheel.
- The grooved trolley wheel was used on many large city systems through the 1940s and 1950s; it was generally used on systems with " old " style round cross sectional overhead wire.
- The trolley wheel was problematic at best; the circumferential contact of the grooved wheel bearing on the underside of the overhead wire provided minimal electrical contact and tended to figure 8 " cross section.
- The first successful electric streetcars in the United States used a system devised by Frank J . Sprague, in which a spring-loaded trolley pole pushed a small trolley wheel up against an overhead wire to collect electricity for the motors.
- Experiments were tried in fitting carbon skids for current collection instead of trolley wheels, and five cars were experimentally fitted : these were reputed to be nos . 74, 121, 136, 147 and 160; the last three definitely had skids.
- In 1896, the former Rock Creek line experimented with a new power system on U Street NW between 9th Street NW and 18th Street NW . The Love system transmitted electricity through a set of trolley wheels running on underground conduit rails instead of through the sliding shoe used elsewhere.
- The section of railroad on which this system has been operated was only 2 miles long, in which distance the curves were considerable, but, although they were mostly in one direction, the indications of wear upon the traction wheels, and upon the guide rail and trolley wheels, were hardly perceptible.
- Both were fitted to the top of the car and were spring-loaded in order to keep, respectively, a small trolley wheel or grooved lubricated " skate " mounted at the top of the pole or a steel rod forming the top of the bow firmly in contact with the underside of the overhead wire.
- In a true line with, and fifteen feet directly above, the face of the track rail was the lower face of a guide rail, supported from posts arranged along the side of the track, and on the sides of this guide rail run pairs of rubber-faced trolley wheels attached to the top of the locomotive and the cars.
- Credit for development of the first working trolley pole is given to Charles Joseph Van Depoele, a Belgian engineer who moved to the United States in 1869 . Van Depoele made the first public demonstration of the spring-loaded device on a temporary streetcar line installed at the Toronto Industrial Exhibition ( now the CNE ) in autumn 1885 . and Sprague employed trolley-pole current collection on an electric streetcar system he installed in Richmond, Virginia, in 1888, also improving the trolley wheel and pole designs.
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