Wiegand Steam Boiler, Patent Model

Wiegand Steam Boiler, Patent Model

This model was submitted to the U.S. Patent Office with application for the patent issued to S. Lloyd Wiegand, of Philadelphia, Pennsylvania, August 6, 1867, no. 67621.
This model is of a boiler having water tubes made up of large tubes closed at the ends with smaller tubes suspended within the large tubes to provide a circulation of steam and water upward in the smaller tubes and of the cooler water down ward in the annular spaces between the larger and smaller tubes. The inventor suggests the use of tubes of different metals to produce a galvanic action for the purpose of preventing deposits of scale within the tubes.
The boiler represented by the model consists of a series of vertical tubes suspended into the furnace from a horizontal header across the top of the boiler setting. The tubes closed at their lower ends, and within each tube is one of smaller diameter. The smaller tubes are suspended from a plate within the header. The headers connecting each row of tubes across the boiler are, in turn, connected by a longitudinal drum above them.
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.
Currently not on view
Object Name
boiler, steam, model
patent model, generator, steam
Object Type
Patent Model
date made
patent date
Wiegand, S. Lloyd
place made
United States: Pennsylvania
associated place
United States: Pennsylvania, Philadelphia
overall: 9 1/8 in x 3 1/4 in x 6 7/8 in; 23.1775 cm x 8.255 cm x 17.4625 cm
overall-from catalog card: 8 in x 4 in x 6 in; 20.32 cm x 10.16 cm x 15.24 cm
ID Number
catalog number
accession number
patent number
See more items in
Work and Industry: Mechanical and Civil Engineering
Industry & Manufacturing
Bulletin 173
Engineering, Building, and Architecture
Data Source
National Museum of American History
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