Milk Boiler Patent Model

Full-size patent model (U.S. Patent No. 181,687) of a milk boiler to prevent milk from boiling over, made by John H. Kinsman of Salem, MA, and patented on August 29, 1876. Consists of two, shallow, wide-necked, funnel-like pieces - one with a row of large cutout circles and the other serrated or notched with semicircles along its rim - that friction fit together at their necks, the perforated one at top and the notched one at bottom, to form one unit to be placed in a boiler or pot. Both pieces made in two parts with soft-soldered lapped seams. Tinned interiors. No marks. Darkened paper tags tied through the two pieces with red or purple (faded) wove ribbon and white string are printed and handwritten with patent information.
Currently not on view
Object Name
boiler, milk
patent date
Kinsman, John H.
Physical Description
iron (overall material)
tin (overall material)
overall: 2 1/4 in x 5 5/8 in; 5.715 cm x 14.2875 cm
place made
United States: Massachusetts, Salem
associated place
United States: Massachusetts, Salem
ID Number
catalog number
patent number
accession number
See more items in
Home and Community Life: Domestic Life
Domestic Furnishings
Group 1
Data Source
National Museum of American History, Kenneth E. Behring Center
Additional Media

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