a German-American immigrant who had a shop dealing in rubber products in Manhattan, New York City, United States. In 1845, he began supplying fittings and valves for rubber products made by the Goodyear Brothers, including air pillows and life preservers. He also made daguerreotype apparatus. Shortly thereafter, he went into partnership with Christian Baecher, a brass turner and finisher. After watching divers at work nearby, Schrader sought to improve the diving helmets of the era. In 1849, he created a new copper helmet. Later, his interest in diving led to him to design an air pump. Later, he created the Shrader valve for pneumatic tires, still used today.
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