Patent Model - Improvement in Tube-Expanders

Maker and role
Hugh Rooney, Patentee
Robert Newdasher, Patentee
Production date
Jul 18 1876
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Object detail

Iron, paint
3 1/2 x 12" (8.9 x 30.5cm)
Rooney and Newdasher's invention "consists, first, in the combination, with springs rigidly secured at one end, of a slotted cap or head and a mandrel, whereby the springs may be separated to fit tubes of different sizes; second in the combination, with the springs of a tube-expander, of detachable rollers; third, in certain details of construction..." (Patent Number 179,868)
Object number
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