APPENDIX. 65 



4.— The Telodynamic, or Wire-rope Transmission. 



FlGUEES 1 AND 3. 



For the present the first telodynamic cable of 765 metres (2,510 

 ft.) is ordered to be made after the pattern of that one which 

 the firm of Eicter & Co., of SchafFhausen, made, and of which 

 sort others have been in use elsewhere for many years. This 

 cable is to communicate motive power from the turbines, to the 

 extent of 300 horse-power, on to the plateau of Perolles, for the 

 use of the various industrial establishments that are already 

 erected or in progress of erection. For this purpose the cable is 

 made out of very strong wires, and is to be an endless cable, 

 which will play over suitable iron rollers fastened on to strong 

 stone pillars, which will have cast-iron bed plates (fig. 1) . These 

 will be put in motion by the turbines (fig. 3) ; and by this means 

 the motive power will be carried forward wherever wanted for 

 driving the machinery of the various industrial operations. The 

 whole length of the cable, from the turbine house in the valley 

 up to the saw-mills on the heights of Perolles, is divided into five 

 stations, of 158 metres each (510 ft.) The cable itself is a wire 

 rope of 3 centimetres (li inch), and runs over bearing rollers 

 of 4'5 metres (14^ ft.) in diameter. The supporting pillars for 

 the rollers are built of massive stones, and are of diff"erent 

 lengths, according to the various depressions or elevations on 

 the line ; the highest of these, which is at the 4th station, is 

 80f ft, high. In consequence of the great slope or declivity 

 on which it was necessary to conduct the wire rope transmission 

 from the valley of the Saane up to the various works, it became 

 necessary to fill up some depressions, and to make excavations 

 for the even course of the transmission power ; and even for 

 some distance the transmission had to be conducted through 

 rocks by means of a parabolic tunnel. By these precaiitions it 

 was rendered possible to have the traction on an even gradient 

 of only 10' 7 per cent. 



The first bearing roller is directly in the turbine house, and is 

 at an elevation of 10| feet over the surface of the water of the 

 outlet canal. The pillar of the first station, as may be seen by 

 the plan and fig. 1, was built on the rocks, between the old and 

 the new bed of the river Saane, and indicates an elevation of 

 29i ft. The support of the bearing roller of the second station 

 is borne by the rocks of the tunnel itself. The pillar of the 

 third station, although of an unimportant height, is being built 

 on a projecting rock ; the same of the pillar of the fourth 

 station, which is, as already stated, the highest of the whole, 

 and is 80| ft. The bearing roller for the 5th station is brought 

 direct into the building of the saw-mill. 



The bearing rollers and pillars for the three first stations 

 are intended for a second cable, and are reckoned to produce 

 E 



