The Eclipse Machine Company was an American bicycle and aircraft component manufacturer.

The Steel Pulley & Machine Company was founded in 1883 in Indianapolis, Indiana by Harmon H. Fulton.

It moved to Beaver Falls, Pennsylvania in 1892 and again in 1895 to Elmira, New York.

[4] During World War II, the company built timed anti-aircraft fuses and 20 mm aircraft cannon.

[5] This United States manufacturing company–related article is a stub.