Patent Model - Machine for Threading Sheet-Metal Pipes
Maker and role
Wellsly Crane, Patentee
Nov 29 1881
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Brass, steel, wood
9 1/4 x 9 x 5 3/4" (23.5 x 22.9 x 14.6cm)
The design of Crane's invention is "to enable screw-threads to be pressed or rolled into the ends of sheet-metal pipes, so as to permit sections of such pipe to be connected together." (Patent Number 250,209)
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