Sturtevants Patent Model of a Hot Air Furnace ca 1869. This model was filed with the application to the Patent Office for Patent Number 95,281 issued to B. F. Sturtevant of Jamaica Plain, MA on September 28, 1869. Mr. Sturtevant’s patent involved recirculating the air being heated in a room or apartment.

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Size: 1938px × 1289px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: engineering, industry, work