Patent Model - Burring-Machine

Maker and role
Thomas Washburn, Patentee
Production date
Oct 11 1845
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Object detail

Wood, iron, brass, paint
10 1/4 x 12 x 16" (26 x 30.5 x 40.6cm)
Washburn claims as his invention "1. The peculiar manner in which the grate bars are made, so as to operate in connection with the cylinders; viz, triangular in cross section, and so as to present an acute angular or sharp edge, for the teeth of the cylinders to act against, in order to remove the bur or burs..." and "2. a toothed fan I, and grate K, in combination with the main and picker cylinders F and G and grate H, the whole being arranged and used in connection with a feeding apparatus..." (Patent Number 4,230)
Object number
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