Patent Model - Improvement in Sand-Sifting Machines
Maker and role
Joseph Hobbs, Patentee
Production date
Apr 08 1879
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Object detail
Media/Materials
Wood, iron
Measurements
9 x 7 x 6" (22.9 x 17.8 x 15.2cm)
Description
Hobbs' patent "relates to machines for sifting sand; and has for its object to provide a machine, to be operated by a crank, that will be easy of movement and thorough in its work. It consists in a sieve and sieve-frame operated by a cam-wheel, and arranged in connection with slotted and rocking bars and an oscillating bar provided with prongs, which enter the sand in the hopper..." (Patent Number 214,040)
Collection
Object number
2015.14.2843a,b
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