US Patent No. 1,468, granted January 10, 1840 to Benjamin Benson of Smyrna, Delaware, for improvements in sericulture equipment. It describes a hurdle frame for feeding silkworms fitted with an endless revolving cloth apron that carries away waste, improving on Gamaliel Gay's 1835 patent. It also describes a lodgment frame with cloth covering and paper fringe strips on which the worms spin cocoons. The scan has two drawing sheets followed by the specification and two claims.