The Allied Chemical & Dye Corporation originated with the 1920 merger of five chemical companies: Barrett Chemical Company (est. 1858), General Chemical Company (est. 1899), National Aniline & Chemical Company (est. 1917), Semet-Solvay Company (est. 1895), and the Solvay Process Company (est. 1881), with the backing of chemist William Nichols, who became concerned about dependence on the German chemical industry during World War I, and financier Eugene Meyer. The company renamed itself the Allied Chemical Corporation in 1958, then simply the Allied Corporation in 1981. Allied merged with the Bendix Corporation in 1983, beginning the company's involvement in aerospace.
The merger of Allied and Signal made aerospace the new company's largest business sector. The combined company adopted the name Allied-Signal on September 19, 1985. It dropped the hyphen to become AlliedSignal in 1993 to reinforce a one-company image and signify the full integration of all of its businesses. On December 1, 1999, AlliedSignal acquired Honeywell and took its more-recognizable name.
LHTEC (Light Helicopter Turbine Engine Company) is a joint venture between Rolls-Royce and Honeywell founded in 1985. The company was originally a partnership between the Allison Engine Company and AlliedSignal Aerospace . In 1995 Rolls-Royce acquired Allison, and AlliedSignal merged with Honeywell in 1999, and adopted its name.
By 1999, the headquaters were inMorristown, New Jersey, the net income was US$ 1.3 billion, revenue US$ 15.1 billion, from 70400 employees.
AlliedSignal was a member of the Dow Jones Industrial Average for all of its existence until February 19, 2008.