1840 Thorp and Angell's Patent Model of a Loom Heddle

Loom Heddles Patent Model
Patent No. 1,498, issued on February 26, 1840
John Thorp and William G. Angell of Providence, Rhode Island
These heddles, both wire and twine, were exhibited in the Patent Office in a round wooden frame. In the patent specification, Thorp and Angell described the dimensions of heddles for use on a common power loom. A chain of the heddles was formed by taking two pieces of wire or twine and tying them with a common square knot, “which will unite them in the same way and manner that a lady ties her apron strings or a child his shoestrings.” The placement of the knots resulted in the formation of the eyes of the heddles, which raise and lower warp threads in weaving cloth.
Thorp and Angell did not include a patent drawing with the specification. The 1841 Journal of the Franklin Institute remarked of this omission: “We must suppose . . . that the description, although to us somewhat obscure, would be clear to a professional weaver.”
Currently not on view
Object Name
loom heddle patent model
model constructed
before 1840-02-26
patent date
Thorp, John
Angell, William G.
Physical Description
wire (heddle material)
twine (heddle material)
wood (frame material)
associated place
United States: Rhode Island, Providence
ID Number
catalog number
accession number
patent number
Patent Models
Patent Models
Patent Models, Textile Machinery
See more items in
Home and Community Life: Textiles
Patent Models
Patent Models, Textile Machinery
Data Source
National Museum of American History, Kenneth E. Behring Center
Janssen, Barbara Suit. Patent Models Index

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