Patent Model - Improved Machine for Making Drain-Pipe

Maker and role
Robert Skinner (b.1821, d.1898), Patentee
Production date
May 12 1868
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Object detail

Brass, iron
12 x 2 1/4 x 2 1/4" (30.5 x 5.7 x 5.7cm)
Skinner's patent provides "an improved machine for making drains and water-pipes, and consists of a stationary cylinder, in which a core is placed. A follower, attached to a piston-head, moves up and down around the stationary core, passing through slots in a centre-block. A closely-fitting packing-ring is placed around the core, and slides up and down upon it by the action of the piston or follower." (Patent Number 77,925)
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