# American Simplex > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/American_Simplex > Markdown URL: https://mediated.wiki/source/American_Simplex.md > Source: https://en.wikipedia.org/wiki/American_Simplex > Source revision: 1322134957 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) Defunct American motor vehicle manufacturer Not to be confused with [Crane-Simplex](/source/Crane-Simplex). This article needs more citations. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "American Simplex" – news · newspapers · books · scholar · JSTOR (February 2024) (Learn how and when to remove this message) Amplex Motor Car Co. Plant (1913) 1906 American Simplex Touring Car American Simplex 30-50 Hp Motor (1910). American Simplex 30/50 Hp Limousine Car (1910). American Simplex 30/50 Hp Chassis (1910). The **American Simplex** was an American [automobile](/source/Car) manufactured in [Mishawaka, Indiana](/source/Mishawaka%2C_Indiana), from 1906 to 1915 by the **Simplex Motor Car Company**; the company shortened its product's name to **Amplex** in 1910 to avoid confusion with the better-known, New York-based Simplex car, made by the Simplex Automobile Company. This change also coincided with a reorganization of the company. Originally the company manufactured a [two-stroke](/source/Two-stroke) [four-cylinder](/source/Four-cylinder) 50[hp](/source/Horsepower) at 900 rpm from 6435 cc with 127 mm bore and 127 mm, later upsized to 6.8 liters and still rated at 50 hp. The top speed was 97 km/h (60 Miles per Hour). The wheelbase was 117 inches = 2972 mm. The gasoline tank held 20 gallons = 76 liters.[1] In 1910, three open-roof models and two enclosed models were offered, costing up to $5,400; the newly introduced 30/50 hp Toy Tonneau, a long, sleek four-door touring car, sold for $4,300. The Amplex's most distinctive feature was its valveless motor, which the company claimed would offer more continuous pulling power and greater reliability. The 1910 models also offered self-starting, a feature that would not be available from major competitors, such as Cadillac, for another year or two.[2] They were expensive cars, a limousine being offered at as much as $5,600. Yet the firm kept using the two-stroke engine after it had become obsolete; a four-stroke was offered unsuccessfully in 1913. Gillette Motor Co took over the Amplex manufacturing facilities in 1916, but refused to manufacture conventional engine-valving, persisting with a rotary [sleeve valve](/source/Sleeve_valve) engine. ## References 1. **[^](#cite_ref-1)** ["American 30/50 Hp"](https://babel.hathitrust.org/cgi/pt?id=mdp.39015069975962&seq=32). American Simplex. 1910-01-01. Retrieved 2025-05-01. 1. **[^](#cite_ref-2)** Floyd Clymer, Historical Motor Scrapbook Number Four, (1952), p.80 This article about a brass-era automobile produced between 1905 and 1915 is a stub. You can help Wikipedia by adding missing information. - [v](https://en.wikipedia.org/wiki/Template:Brass-auto-stub) - [t](/source/Template_talk%3ABrass-auto-stub) - [e](https://en.wikipedia.org/wiki/Special:EditPage/Template:Brass-auto-stub) --- Adapted from the Wikipedia article [American Simplex](https://en.wikipedia.org/wiki/American_Simplex) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/American_Simplex?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.