About Twine Street Term
During the campaign for municipal elections, and fenottes gons have not failed to read numerous projects on the existing road tunnel Street End, once the railway of the Red Cross, more commonly known as the string. Logical when you know how a cable made of 252 steel son 2 mm in diameter each, like one of those strings that can just as easily attach a package of your pants Poreau. So we were right for several weeks of promises that could lead to rise faster Vélov, strollers and baby bottles to climb slopes wind comforters and our will smoke to relax Bamban exhausting. Well, in a few days, when our elected officials have chosen their offices, found the right key to enter and set up their family photos, we ask what exactly they were. A platform? A breast butt? An escalator? A cable? We'll see. Meanwhile, it can help, we offer them the opportunity to discover exactly what that famous String, String, one day, a mayor, decided to remove the car at once can access our charming plateau. We were at that time very little to show our disagreement on this measure. So ... Not only
String rendered immense service to Lyon and Croix-Rousse but also was a considerable technical prowess. The proof: In 1863, the Parisian journal L'Année Scientifique et Industrielle de Louis Figuier, a collection which brings knowledge the public the science, inventions, and applications to industry and arts of the year, published a long article on not'Ficelle! Some excerpts:
"was inaugurated in 1862 in Lyon, a small railway to link the street to the term plateau of the Croix-Rousse, and has a provision as bold and new. The angle of 4 cm per meter has never been exceeded on any railway, the ramp is 16 cm here. A little more and the cars would climb angles, like lizards along a wall.
Railways Red Cross does makes use of locomotives, it is fixed traction, such as railways inside the mines. The train is pulled upwards by a cable that wraps around a capstan and huge serves to raise the long boom: the descent is by the conduct of the same cable that holds the convoy and moderates the speed of the fall.
Each train consists of only two cars, but the dimensions of these cars are such that they can each hold 100 passengers. A steam engine of 100 horse power rotates a drum 4 and a half meters in diameter, around which the cable is wound. The piston travel Steam machines is 2 meters; boilers are tubular and forced air flow. A fan, operated by a steam engine of 10 horse power, constantly sending air under the home, to enable combustion.
We had to make the greatest attention to the design of the cable for supporting the entire weight of the train. This cable is made of the meeting of 252 steel son of 2 millimeters in diameter. IT would be able, based on authentic tests that have been made to bear a weight of 100,000 kilograms, while supporting the effort to climb the train reaches to 10 000 kilograms. (...) The authority wanted the new railway cars brakes were armed with sufficient power to stop the train rushed on the slope of the track, in the case of a broken cable.
These brakes have been built by engineers of the company and Mr Molinos Pronnier and upon receipt of the railway from Lyons to the Red Cross, they have suffered, before the official commission, a series of trials of the most conclusive . Here are the rules adopted by Messrs. Molinos and Pronnier for this important and difficult result.
The railway has a uniform slope of 165 mm by meters. A train left on the slope, all wheels halted, taking still slip through his enormous weight considerable speed. To avoid all the dangers of a cable break, it is not enough to equip vehicles with regular brakes, they must add an additional brake whose action, coupled with the jamming of the wheels, produces a stop infallible. To this end, each truck carries two brake systems, to act automatically by the fact of the cable break. (...) Experience has fully demonstrated the effectiveness of these provisions. Twelve times in the presence of the Committee of receipt the cable break was simulated by means of a click, the train down to walking at 2 meters per second (speed limit); stop happened every time without appreciable shock, after a slip of 3 m 50: the car fully loaded weighed 18,000 kilograms each. (...)
The establishment of the Gare de Lyon has necessitated the opening of a trench 11 meters, surrounded by steep houses 4 to 5 floors, whose support has made the biggest house difficultés.Une 4 floors placed straddling the line was preserved: the tunnel which was literally carved bears in the cellars of this house, without compromising its strength. Other houses on a large tunnel, were kept under similar conditions. In a word, the difficulties of any kind had to be overcome to achieve the realization of this new and elegant company. Their number and importance, make it more remarkable that the complete success has crowned the work, including the happy idea, as well as the full execution, is the highest honor the two company engineers MM. Molinos and Pronnier. "
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