![]() ![]() ![]() Unshelled nuts are still popular in China, where a key device is inserted into the crack in walnuts, pecans, and macadamias and twisted to open the shell. A design, similar to a car jack, that gradually increases pressure on the shell to avoid damaging the kernel inside is used by the Crackerjack, patented in 1947 by Cuthbert Leslie Rimes of Morley, Leeds and exhibited at the. The spring-jointed nutcracker was patented by in 1913. Alternative designsIn the 17th century, screw nutcrackers were introduced that applied more gradual pressure to the shell, some like a. After the 1960s, the availability of pre-shelled nuts led to a decline in ownership of nutcrackers and a fall in the tradition of nuts being put in children's. ![]()
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