Slovak Inventors Juraj Olejk Samo Majernk Jn Bah

Slovak Inventors Juraj Olejňák & Samo Majerník

Ján Bahýľ He is consiedered as a father of helicopter 1895 – presented his first concept of helicopter in Bratislava He was improving his invention for years till first real flight of his invention in 1901 Many other inventors used his concept and created their own

Ján Bahýľ Finally he could not get enough resources to build his invention in bigger scale Louis Brequet and Paul Cornu had found investor and now are official inventors of helicopter

Štefan Banič He was born on 28 th November, 1870 in Neštich and died on 2 nd of January, 1941 in Neštich 1907 - he moved to USA 1913 - he designed and constructed the first parachute on the principle of umbrella

Štefan Banič 1914 – he jumped from the 15 -floors high building in Washington and showed representatives of the Patent Office, that his parachute is His parachutes were used by American pilots in first World War. ´ working.

Jozef Karol Hell Important constructor of mine pumping machines Born on 15 th of May, 1713 in Banská Štiavnica In his 25, he build pumping machine made all from wood that could siphon 200 litres per minute into the height of 80 meters

Jozef Karol Hell He soon became main mechanical foreman in Štiavnice mines He was the first man who used compressed air in his machines His machines were used all around the world not just in mines but also in oil rigs

Jozef Murgaš He was born on 17 th February , 1864 in Tajov and died on 11 th May , 1929 in USA 1896 – he moved to USA 27 th April 1905 – He made a first radio transmission of the spoken word, so he actually invented a radio.

Jozef Murgaš 23 th November , 1905 he organized a radio communications that took place between the villages of Scranton and Wilkes-Barre, spaced 30 km. He also invented wavemeter, electrical transformer and Reel for fishing rod

Štefan Anián Jedlík One of the biggest names in electrotechnics in 19. century Born on 11 th of January, 1800 in Zemné 1828 – build small electromagnet for his experiments with elecrticity - which is basically electric motor He did not published his discovery so he did not became famous

Štefan Anián Jedlík He invented principe of electromagnetic rotations He invented many machines (some says around 80), like electric dynamo, electric locomotive, pipe lighting collector and how to make a soda water He is author of physics textbook

Jozef Maximilián Petzval Physicist, mathematician and inventor Jozef Maximilian Petzval is considered as the founder of modern optics. He was born in 1807 in Spišská Belá and died on 17 th September, 1891 in Vienna In 1840 he invented a photographic lens.

Jozef Maximilián Petzval He also proposed the concept of projectors, telescopes, and various improvements in labor microscope. His main contribution to modern optics was mainly the calculation of the correction optical systems.

Sources http: //www. slovenskivynalezcovia. webz. cz/index 2 osb nosti. htm http: //magazin. atlas. sk/techmag/najvacsie-slovenskevynalezy/793018. html

Thank you for your attention Juraj olejňák & Samo Majerník 3. A