Cock Grinding Machine Patent Model
date: label: date made
content: 1880
label: patent date
content: 1880-01-13
name: label: inventor
content: Hayden, Joseph L.
notes: label: Description
content: Patent: US223507
label: Description
content: This is a patent model for a machine for grinding cocks, invented by Joseph L. Hayden of Cambridgeport, Massachusetts, patented on January 13, 1880.
label: Description
content: This invention automated the precise fitting of stopcock plugs into their barrels. The plug underwent two simultaneous motions: it slowly rotated while rapidly oscillating back and forth, which allowed uniform grinding and fitting. The barrel was mounted on a carriage that moved toward the spinning plug and was pressed into place using adjustable weights to control the grinding pressure. Once the plug was properly seated, a cam mechanism automatically disengaged the barrel from the plug, freeing it for removal.
label: Location
content: Currently not on view
place: label: place made
content: United States: Massachusetts, Cambridgeport
label: associated place
content: United States: Massachusetts, Cambridgeport
setName: label: See more items in
content: Work and Industry: Mechanical and Civil Engineering
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: MC.308833
label: catalog number
content: 308833
label: patent number
content: 223,507
label: accession number
content: 89797
objectType: label: Object Name
content: patent model, grinding machine, cock
physicalDescription: label: Measurements
content: overall: 10 in x 12 1/8 in x 6 3/4 in; 25.4 cm x 30.7975 cm x 17.145 cm