Patent Model Adder by Milton W. Hinkle
date: label: date made
content: 1878
name: label: patentee
content: Hinkle, Milton W.
label: maker
content: Hinkle, Milton W.
notes: label: Description
content: This patent model for an adder has wooden sides and a brass strip that covers the front, bottom, and back. The top of the instrument is curved at the front to the shape of two wheels that rotate inside it. A strip of wood between the wheels has the digits from 1 to 9 marked on it. Each wheel has the digits from 0 to 9 marked on it three times. A pin protrudes from the wheel between each digit, and each tenth pin is slightly longer than the others. The spacing of the digits is the same as that on the case. The large wheels are linked to two smaller toothed wheels at the back of the instrument. These wheels are marked with the numbers from 0 to 13, and are meant to move forward every time the large wheel passes a “10” pin, recording numbers that should be carried. There are no separate wheels for registering results.
label: Description
content: A mark on the right side reads: Milton W. Hinkle (/)] INVENTOR (/) Memphis Tenn (/) 1877. Another mark there reads: 27-101.
label: Description
content: Compare to Burns addometer (308911) and Ballou adding machine (309323).
label: Description
content: There was a Milton Washington Hinkle Jr., born January 8, 1848, in Carrollton, Carroll County, Kentucky, with parents Jacob and Nancy Kennedy Hinkle. Whether this is the same Milton Washington Hinkle is unclear.
label: Description
content: This machine was once in the collection of L. Leland Locke and was exhibited at the Museums of the Peaceful Arts in New York City.
label: Description
content: References: U.S. Patent 200911, January 11, 1878. Munn & Co. attorneys for patent.
label: Description
content: William Sumner Junkin, Minnie Wyatt Junkin, <I>The Henckel genealogy. . .</I>, New Market, Va., Henckel Family Association, 1964, p. 109.
label: Location
content: Currently not on view
place: label: place made
content: United States: Tennessee, Memphis
label: place patented
content: United States: Tennessee, Memphis
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Adder
label: See more items in
content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of L. Leland Locke
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MA.311956
label: accession number
content: 155183
label: catalog number
content: 311956
objectType: label: Object Name
content: adder
physicalDescription: label: Physical Description
content: wood (overall material)
label: Physical Description
content: brass (overall material)
label: Measurements
content: overall: 9.6 cm x 3 cm x 13.5 cm; 3 25/32 in x 1 3/16 in x 5 5/16 in