In 1914, Prószyński marries Dorothy Abrey. Soon, the couple welcomes their two children to the world: Kazimierz Junior and Irena. The family moves to the USA, where Prószyński works on his new invention: a camera he calls Oko (Polish for ‘an eye’), the great-grandfather of today’s GoPro cameras.
A box the size of an A4 sheet and just 4 inches wide is enough for Prószyński to fit a system that can record films onto a tiny film tape. The light and portable device can do more than just record films: equipped with a special 450W bulb, the camera also doubles as a film projector.
In 1923, after Prószyński’s return to Poland, mass production of the Oko camera takes off, but the device never enjoys commercial success. Only 100 camera-projectors are released on the market, and not a single one gets sold.
World War II finds the inventor in Warsaw. Prószyński is working on his new ideas. One of them is the autolektor, the precursor to the modern audiobook. The device can record books on the old film tapes for the blind to listen to. Prószyński patents his invention in 1943, but it never becomes popular.
In August 1944, the Warsaw Uprising begins. Prószyński, his wife and daughter are arrested by the Germans. He is taken to the camp in Pruszków, and then to Gross-Rosen and Mauthausen concentration camps. He dies on 13th March 1945.
Translated by Agata Zano