Jaroslav Šafránek
Jaroslav Šafránek ( May 23 1890 Pilsen – Aug 22 1957 Prague ) was a Czech physicist who , in the second half of the 1930s , designed a system for the transmission of visual images by low-line mechanical television , which made the production of an authentic spatial impression of the picture , transmitted on the screen , possible . 
<triplet> Jaroslav Šafránek <subj> May 23 1890 <obj> date of birth