. The street railway review . a number of urban lines having an aggregate length of 12 km., ap-proximately, and suburban lines to Luynes, Saint Avertin andVouvray. The Diatto system is installed only in the heart of thecity, the remainder of the lines being equipped with the overheadtrolley system. The power house contains four boilers having aheating surface of 165 sq. m. each, giving 2,000 kg. of steam perhour. There are three simple condensing engines of 300 h. p., beltconnected each to a generator of 200 kw. capacity, giving currentsof 550 volts pressure. The system of distribution, which
. The street railway review . a number of urban lines having an aggregate length of 12 km., ap-proximately, and suburban lines to Luynes, Saint Avertin andVouvray. The Diatto system is installed only in the heart of thecity, the remainder of the lines being equipped with the overheadtrolley system. The power house contains four boilers having aheating surface of 165 sq. m. each, giving 2,000 kg. of steam perhour. There are three simple condensing engines of 300 h. p., beltconnected each to a generator of 200 kw. capacity, giving currentsof 550 volts pressure. The system of distribution, which is describedin La Nature, is comprised of cables buried directly in the groundfrom which are connected all the branches which operate throughthe surface contacts. On the surface of the road, between the rails, are placed surfacecontact blocks at short intervals apart, each having in its center ametallic piece E, Figs, i and 2, which is slightly raised above thesurface. In the interior of the block is a pipe connected with the. riC. 1. FIG. 2. branch I from the cable J coming from the power house. The carcarries an electromagnet .V which magnetizes the pieces B, C andD. These in gliding over the metallic surface piece attract a mova-ble piece in the interior of the pipe which establishes electrical com-munication between the bar B on the car and the cable J from thestation. The blocks are thus put in electrical connection with thecable only at the moment that the magnet bar of the car is abovethem, and the circuit is broken as scon as the car has passed. Theblocks are placed sufficiently close togetlier so that the magnetbar is always over one of them and the electrical connection be-tween the cable and the car remains continuous. The contact blockforming part of the pavement is made of asphalt, as shown in thetransparent design, Fig. 2, the middle of it being hollow and theopening to the surface containing a tube. At the upper part is afixed plug E, of anti-niagnctic metal havi
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
