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McIntosh & Seymour was an American manufacturer of steam and internal combustion engines during the late 19th and early 20th centuries.

The company was founded in 1886, and was based in Auburn, New York. It developed and sold a wide variety of steam engines through the end of the 1800s, and by 1910 had begun to build diesel engines to a design from the Swedish company Aktiebolaget Atlas. It primarily produced large engines for stationary generator and marine applications. In the 1920s, McIntosh & Seymour was an early builder of diesel engines for use in railroad locomotives, providing an engine to the American Locomotive Company (Alco) for an experimental locomotive. In 1929, Alco purchased McIntosh & Seymour, and operated it as a subsidiary for some time before the name vanished. Under Alco ownership, McIntosh & Seymour designed and built Alco's first production diesel engine, the 531.

The company's archives are held by the Smithsonian Institution, covering the period from circa 1886-1939.

References

1. ^ "History of an Engine Company: McIntosh & Seymour Corporation". Gas Engine Magazine. 2013. Retrieved February 18, 2017.
2. ^ Boyd, Jim (2000). Passenger Alcos In Color. Scotch Plains, NJ: Morning Sun Books. p. 5. ISBN 1-58248-029-X.
3. "Preliminary Guide to the McIntosh, Seymour and Company Records". Smithsonian Institution. Retrieved October 30, 2019.

• American companies established in 1886
• Manufacturing companies based in New York (state)
• Manufacturing companies disestablished in 1929
• Steam engine manufacturers
• Diesel engine manufacturers
• Locomotive engine manufacturers
• Engine manufacturers of the United States
• Auburn, New York