Patent Model - Improvement in Fluting-Machines

Maker and role
John Donovan (b.1850, d.1900), Patentee
Production date
Jun 08 1875
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Object detail

Brass, metal, wood
9 3/8 x 12 x 9" (23.8 x 30.5 x 22.9cm)
Donovan's invention consists "in the first part, of a certain particular device for depressing the lower roller-frame and returning it into mesh with the upper one, the device being so constructed as to fully support the frame during adjustment. My invention consists, in the second part, in peculiar devices for regulating the power of the spring; and in the third part, in a device for securing the lower roll at the lowest point of its adjustment, to prevent the return by the spring, when necessary." (Patent Number 164,272)
Object number
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