Patent Model - Centrifugal Fan

Maker and role
Friedrich Pelzer, Patentee
Production date
Nov 26 1889
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Object detail

Tin, paint
5 x 4 1/4" (12.7 x 10.8cm)
Pelzer states, "To obtain the desired end the invention consists of a centrifugal fan or ventilator comprising a wheel having a closed end, with the spokes or arms thereof forming discharge-passages, and wings forming a screw for conducting the air to said passages..." (Patent Number 416,070)
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