Carl Roman Abt (16 July 1850 – 1 May 1933Herring, Peter (2000).) was a Swiss

mechanical engineer Mechanical may refer to: Machine * Machine (mechanical), a system of mechanisms that shape the actuator input to achieve a specific application of output forces and movement * Mechanical calculator, a device used to perform the basic operations of ...

, inventor and entrepreneur. He made groundbreaking innovations in rack-and-pinion railways, giving his name to one of the most widely used systems developed for mountain railways, the

Abt rack system A rack railway (also rack-and-pinion railway, cog railway, or cogwheel railway) is a steep grade railway with a toothed rack rail, usually between the running rails. The trains are fitted with one or more cog wheels or pinions that mesh with ...

Biography

Abt was born on 16 July 1850 in Bünzen. In 1882, while working in Paris, he designed and patented his rack-railway system that enabled at least one tooth of the rack to be permanently engaged. It was first used at the

Rübeland Railway The Rübeland Railway (german: Rübelandbahn) is a railway link from Blankenburg via Rübeland and Königshütte to Tanne in the German state of Saxony-Anhalt. It was built by the Halberstadt-Blankenburg railway (HBE) between 1880 and 1886 ...

in the

Harz The Harz () is a highland area in northern Germany. It has the highest elevations for that region, and its rugged terrain extends across parts of Lower Saxony, Saxony-Anhalt, and Thuringia. The name ''Harz'' derives from the Middle High German ...

mountains (Germany). Abt also developed the self-regulating Abt Switch for

funicular A funicular (, , ) is a type of cable railway system that connects points along a railway track laid on a steep slope. The system is characterized by two counterbalanced carriages (also called cars or trains) permanently attached to opposite en ...

railways and led the construction of 72

mountain railway A mountain railway is a railway that operates in a mountainous region. It may operate through the mountains by following mountain valleys and tunneling beneath mountain passes, or it may climb a mountain to provide transport to and from the sum ...

s worldwide including the Visp-Zermatt,

Gornergrat The Gornergrat ( en, Gorner Ridge; ) is a rocky ridge of the Pennine Alps, overlooking the Gorner Glacier south-east of Zermatt in Switzerland. It can be reached from Zermatt by the Gornergrat rack railway (GGB), the highest open-air railway in ...

, Furka Oberalp and Ferrovia Monte Generoso railways. The most famous railway built with the Abt system is the

Arica–La Paz railway The Arica–La Paz railway or Ferrocarril de Arica–La Paz (FCALP) was built by the Chilean government under the Treaty of Peace and Friendship of 1904 between Chile and Bolivia. The railway line was inaugurated on 13 May 1913 and is the short ...

Bolivia , image_flag = Bandera de Bolivia (Estado).svg , flag_alt = Horizontal tricolor (red, yellow, and green from top to bottom) with the coat of arms of Bolivia in the center , flag_alt2 = 7 × 7 square p ...

. In 1903, as president of the

Gotthardbahn The Gotthard railway (german: Gotthardbahn; it, Ferrovia del Gottardo) is the Swiss trans-alpine railway line from northern Switzerland to the canton of Ticino. The line forms a major part of an important international railway link between nort ...

company, Abt led buy-back negotiations with the

German Confederation The German Confederation (german: Deutscher Bund, ) was an association of 39 predominantly German-speaking sovereign states in Central Europe. It was created by the Congress of Vienna in 1815 as a replacement of the former Holy Roman Empire, w ...

during the

nationalisation Nationalization (nationalisation in British English) is the process of transforming privately-owned assets into public assets by bringing them under the public ownership of a national government or state. Nationalization usually refers to pri ...

of private railway companies. He received many honours, including an

honorary doctorate An honorary degree is an academic degree for which a university (or other degree-awarding institution) has waived all of the usual requirements. It is also known by the Latin phrases ''honoris causa'' ("for the sake of the honour") or ''ad hon ...

(Doctor honoris causa) from the

Technical University of Hannover Gottfried Wilhelm Leibniz University Hannover (german: Gottfried Wilhelm Leibniz Universität), also known as the University of Hannover, is a public research university located in Hanover, Germany. Founded on 2 May 1831 as Higher Vocational Sc ...

and the

John Scott Medal John Scott Award, created in 1816 as the John Scott Legacy Medal and Premium, is presented to men and women whose inventions improved the "comfort, welfare, and happiness of human kind" in a significant way. "...the John Scott Medal Fund, establish ...

in 1889. He was also a patron and connoisseur of the arts, a member of the Swiss Federal Art Commission from 1904-1907 and the President of the Swiss Art Association from 1905-1911.

Pastimes

Abt was a keen collector of hammered gold artwork; he would not let go of any coin or medal whose special beauty aroused his artistic interest. His coin and art collection was auctioned off after his death.

Abt switch

Bundesarchiv_Bild_183-1985-0927-007,_Dresden,_Standseilbahn

Abt switch is a

railroad switch A railroad switch (), turnout, or ''set ofpoints () is a mechanical installation enabling railway trains to be guided from one track to another, such as at a railway junction or where a spur or siding branches off. The most common ty ...

system invented by Carl Roman Abt. It is widely used in

railways. Railway vehicles used in the Abt switch don't have wheels with one flange as in ordinary railways, but instead use wheels with two flanges and wide wheels without flanges. Normally, two cars are used in a funicular, and it is a single track except for the

passing loop A passing loop (UK usage) or passing siding (North America) (also called a crossing loop, crossing place, refuge loop or, colloquially, a hole) is a place on a single line railway or tramway, often located at or near a station, where trains or ...

. Each vehicle always passes the track on the same side at the passing loop, using wheels with two flanges on the outer side and wheels without flanges on the opposite side. The rail on the outside of the passing loop is sandwiched by the two flanges same as the rail in the single track section, and there is no break. The inner rails have cuts where the cable and flanges of the outer wheels pass. Wide wheels pass the cuts without hindrance. Unlike an ordinary railway switch, an Abt switch has no moving parts.

Gallery

SMR Axle on display at Llanberis 05-07-24 20.jpeg, Abt rack system West Coast Wilderness Railway Mount Lyell No. 3.JPG,

Mount Lyell Mining and Railway Company Mount Lyell Mining and Railway Company was a Tasmanian mining company formed on 29 March 1893, most commonly referred to as ''Mount Lyell''. Mount Lyell was the dominant copper mining company of the West Coast from 1893 to 1994, and was based in ...

No. 3, an Abt type locomotive

References

Sources

*Herring, Peter (2000). ''Ultimate Train'', Dorling Kindersley Limited, London, 2000, p. 144. *Wägli, Hans G. (2005). ''Carl Roman Abt.'' In: ''Sieben Bergbahnpioniere.'' Zürich 2005. S. 23--34. Schweizer Pioniere der Wirtschaft und Technik. Bd. 81.

External links

*
Works about Carl Roman Abt
in the catalogue of the

Swiss National Library The Swiss National Library (german: Schweizerische Nationalbibliothek, french: Bibliothèque nationale suisse, it, Biblioteca nazionale svizzera, rm, Biblioteca naziunala svizra) is the national library of Switzerland. Part of the Federal Office ...

World Rack Railways
Deutsche Biographie {{DEFAULTSORT:Abt, Carl Roman 1850 births 1933 deaths People from Muri District 19th-century Swiss inventors Swiss mechanical engineers Swiss railway mechanical engineers Swiss railway pioneers Rack railways 20th-century Swiss engineers 19th-century Swiss engineers Swiss expatriates in France