Technikatörténeti szemle 11. (1979)
TANULMÁNYOK - Vajda Pál: Creative Hungarians in mathematics, astronomy, physics, chemistry, technical sciences and industry. A selected bio-bibliography
His greatest achievement was the classification of the energy conversion process in the cochlea. Keidel, W. D.: Georg von Békésy (— Umschau 1962. p. 2.), Current Biography 1962. p. 36—38., American Men of Science 10/1960—1962., Levi H.: George de Békésy (Nuclear Physics vol. A. 98/1967/ pp. 1—24.) WHC, CH, CRW, ABE BENEDIKT, Ottó (1897—1975). Electrical engineer. Ottó Benedikt invented in the thirties the 50-Hz, automatically compensated, single-phase commutator motor, known as the „Benedikt motor”. In 1948 he worked out a new method for the vector-diagramming of processes taking place in the phase-reversing units, and also found a means of abolishing the asymmetry brought about in the railway network by this machine. He invented the „commutator motor driven simultaneously by two frequencies”. By the help of the nomographical methods worked out by him problems of magnetic circuits — previously regarded as unsolvable ones — could be solved simply and quickly. In the field of amplifying machines the device „Autodin” invented by Benedikt is a very important achievement — this is an amplifying machine of a novel type that, contrary to all previous ones, does not require a driving motor. He elaborated the complete theory of the motor, including both stationary and transient conditions, a theory of considerable complexity. Sequenz H.: 80 Jahre Elektrische Maschinen (= Elektrotechnische Zeitschrift 1960. pp. 285—294.), Geszti, Otto P.: O. Benedikt 1899—1975 (= ATH 83/1976. pp. 1-3.) BÖLCSKEI, Elemér (1917—1977) civil engineer. Bölcskei’s name in connected with the first over fly made of aluminium in Europe; he was the first to apply V-shaped frames for supporting bridges and shell structures for foundations. The reinforced concrete bridge of largest span in Hungary was designed by him and he was the designer of the first Hungarian prestrained concrete stucture as well. In his theoretical research- work based on practical interest he achieved outstanding scientific results by determining the limit load beering of the axially compressed bar. The partial differential equation of second order for the deformation of membranes and the general membrane theory in rectangular coordinates were given by him. By introducing the theory of probabilities in the design of structures he provided the standards with an up-to-date basis. An aluminium bridge in Hungary (= Light Metals 18/1955. pp. 106—110), P. Csonka: E. Bölcskei (= ATH 86/1978. pp. 1—7.), Elemér Bölcskei (— VPMS Feb. 1958. pp. 2.), A. Beles—M. Soare: Das elliptische und hyperbolische Paraboloid im Bauwesen, Berlin. 1976. p. 97. BRÓDY, Imre (1891—1944). Physicist. The perfect incandescent lamp — the lamp filled with krypton gas is the invention of Imre Bródy (1937). The first plant in the world to produce krypton gas directly from the atmosphere in a quantity large enough to satisfy the demands of incandescent lamp manufacture was erected at Ajka in Hungary after Brody’s plans. Pálos J.—lllényi A.: Imre Bródy (= ATH 24 1959. pp. 221—229.), VPMS May 1960. p. 2., Vajda P.: The Hungarian Technical Calendar. Inventor of Krypton Lamp (= Hungarian Exporter 1964/no. 12. p. 5.) CH 54
