Steam Cooker Patent Model

Steam Cooker Patent Model

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Full-size patent model (U.S. Patent No. 77,702) of a two-pot, vegetable steamer or cooker, made by Heinrich A. Zopff of Milwaukee, WI, and patented on May 5, 1868. The upper pot is double-walled with a perforated liner and covered conical bottom for catching the steam, while the lower pot has a copper pit bottom. Both are wire-rimmed with two, horizontal, arched strap handles and vertical folded seams. Concave cover has an arched strap handle, folded edge, and soft-soldered lapped-seam flange. Brass oval metal tag on upper pot is engraved in script "H.A. Zopff / Milwaukee / Wisconsin". Two darkened paper tags tied to one handle with red or purple (faded) wove ribbon and white string are printed and handwritten with the patent information.
Currently not on view
Object Name
cooker, steam
date made
ca 1868
patent date
place made
United States: Wisconsin, Milwaukee
place patented
United States: Wisconsin, Milwaukee
Physical Description
tinned sheet iron (overall material)
wire, iron (rims material)
copper (pit bottom material)
brass (maker's tag material)
overall: 11 5/8 in x 10 1/8 in x 8 in; 29.5275 cm x 25.7175 cm x 20.32 cm
ID Number
catalog number
accession number
patent number
See more items in
Cultural and Community Life: Domestic Life
Domestic Furnishings
Data Source
National Museum of American History
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