Hewitt Piston-Rod Packing, Patent Model

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
Object Name
piston rod packing, model
patent model, piston rod packing
date made
1879
patent date
1879-06-03
inventor
Hewitt, John
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
place made
United States: Missouri
associated place
United States: Missouri, St. Louis
ID Number
MC*309247
catalog number
309247
accession number
89797
patent number
216,038
subject
Engineering, Building, and Architecture
Work
Industry & Manufacturing
Bulletin 173
See more items in
Work and Industry: Mechanical and Civil Engineering
Bulletin 173
Data Source
National Museum of American History, Kenneth E. Behring Center
Related Publication
Frank A. Taylor. Catalog of the Mechanical Collections of the Division of Engineering United States National Museum, Bulletin 173
Additional Media

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Image CAPTCHA
Enter the characters shown in the image.