František Křižík

František Křižík
František Křižík (most likely in 1902)
Born July 8, 1847
Plánice, Bohemia, Austrian Empire
Died January 22, 1941 (1941-01-23) (aged 93)
Stádlec, Protectorate of Bohemia and Moravia
Resting place Vyšehrad cemetery
Nationality Czech
Occupation Engineer, entrepreneur
Known for Arc lamp
Salary 24550

František Křižík (Czech: [ˈfraɲcɪʃɛk ˈkr̝̊ɪʒiːk]; July 8, 1847 – January 22, 1941) was a Czech inventor, electrical engineer, and entrepreneur.

Biography

Křižík was born into a poor family in Plánice, located at the time within the Austrian Empire. In spite of this, Křižík managed in 1866 to study engineering at the Technical University of Prague ČVUT.

Křižík is considered the pioneer in practical electrical engineering and in electrification of Bohemia (and Austro-Hungarian empire) and at the time was often compared to Thomas Edison. In 1878 Křižík invented a remotely operated signalling device to protect against collision between trains.[1] Křižík's cores are magnetic solenoids cores shaped so as to insure an approximately uniform pull in different positions in the solenoid.

His first experiments in Plzeň resulted in invention in 1880 of the automatic electric arc lamp, the so-called "Plzen Lamp" which was displayed at the International Exposition of Electricity in Paris in 1881. This lamp, with self-adjusting brushes, won the gold medal from among 50 similar devices.[1] Later he successfully defended his patent against Werner Siemens claim to have created it first. His lamps were successfully used in many cities for street lighting. The restored and fully functional patented arc lamp with automated electrode adjustment can be viewed at the Museum of Pilsen.

In 1895 Křižík build one of first electromobiles in Austrian empire.

In 1884 Křižík set up his own company building city lighting, tramway lines, street cars, power stations, and various electric equipment.

A Prague subway station was named after František Křižík – Křižíkova.

Electric railway Tábor – Bechyně

František Křižík built the first electric railway in the Austro-Hungarian empire in 1903. The track gauge was 1,435 mm (4 ft 8 1⁄2 in) standard gauge. The maximum speed was 50 km/h (31 mph).

Railroad Stations: Tábor – Horky u Tábora – Slapy – Libějice – Malšice – Čenkov u Malšic – Třebelice – Všechlapy – Bechyňská Smoleč – Sudoměřice u Bechyně – Bežerovice – Bechyně zastávka – Bechyně

Legacy

The main belt asteroid 5719 Křižík was named in his honor.[2]

References

  1. 1 2 František Křižík
  2. ↑ "JPL Small-Body Database Browser". NASA. Retrieved 2008-05-03.
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