Depth Gauge, Patent Model, 1867
date: label: date made
content: 1867
label: patent date
content: 1867-07-02
name: label: inventor
content: Hurd, Ivory A.
notes: label: Description
content: This model is that of a depth gauge patented under U.S. patent No. 66,239 by Ivory A. Hurd on July 2, 1867. It is made of black sheet-iron with a bright steel screw. There is a streak of white paint on one side, and the other side of the same face reads, “A. Hurd, Boston Mass.” Hurd’s innovation came with combining the wings to a screw spindle and check nut. The spindle can be adjusted to a given distance below the edge of the wing, and is then used as a gauge to measure depth in holes or for the thickness of a plate of metal on a planning machine.
label: Location
content: Currently not on view
place: label: associated place
content: United States: Massachusetts, Boston
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.308921
label: catalog number
content: 308921
label: patent number
content: 66,239
label: accession number
content: 89797
objectType: label: Object Name
content: patent model, gauge, depth
physicalDescription: label: Measurements
content: overall: 4 5/8 in x 3 7/8 in; x 11.7475 cm x 9.8425 cm