Hewitt Piston-Rod Packing, Patent Model

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Description
This model was submitted to the U.S. Patent Office with the application for the patent issued to John Hewitt, of St. Louis, Missouri, June 3, 1879, no. 216038.
The model represents a 2-piece, flange-and-gland stuffing box of the usual form, packed with malleable metal rings with beveled edges. The rings are alternately beveled in opposite directions so that adjoining surfaces match. The edges of the flange and gland are beveled so that when the parts are brought together and tightened the effect is of a number of double wedges sliding together and expanding between the stuffing box and the shaft.
Reference:
This description comes from the 1939 Catalog of the Mechanical Collections of the Division of Engineering United States Museum Bulletin 173 by Frank A. Taylor.
Location
Currently not on view
date made
1879
patent date
1879-06-03
inventor
Hewitt, John
place made
United States: Missouri
associated place
United States: Missouri, St. Louis
Physical Description
brass (overall material)
Measurements
overall: 3 in x 4 in x 7 in; 7.62 cm x 10.16 cm x 17.78 cm
ID Number
MC.309247
catalog number
309247
accession number
89797
patent number
216,038
See more items in
Work and Industry: Mechanical and Civil Engineering
Work
Industry & Manufacturing
Bulletin 173
Engineering, Building, and Architecture
Data Source
National Museum of American History, Kenneth E. Behring Center

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