- 1819:
- The Siebe company formed by Augustus Siebe, a British inventor who developed one of the first diving helmets
- 1856:
- Saxby registers the first patent for Interlocking of Points and Signals in the UK
- 1860:
- Saxby & Farmer become the world's first Signalling Manufacturer
- 1869:
- George Westinghouse patents the air brake and establishes the Westinghouse Air Brake Company in USA
- 1875:
- Westinghouse Continuous Brake Co opens first UK depot at Kings Cross
- 1881:
- Westinghouse Brake Co Ltd established
- 1914:
- George Westinghouse dies aged 67 after founding 60 companies and granted 361 US patents in his lifetime
- 1920:
- Westinghouse Brake Co Ltd combines with Saxby & Farmer Ltd
- 1968:
- Westinghouse is a central player in the introduction of the world's first fully automated passenger railway, the Victoria Line on London's Underground
- 1979:
- Westinghouse acquired by Hawker Siddeley Group
- 1984:
- Westinghouse selected for Singapore Metro
- 1985:
- Westinghouse installs the word's first electronic interlocking system, the SSI, at Leamington Spa in the UK
- 1989:
- Westinghouse wins first contract for Beijing Metro
- 1999:
- BTR and Siebe merge to create Invensys
- 2001:
- Invensys Rail Group created
- 2003:
- Westinghouse wins the largest signalling contract ever awarded (in excess of £1 billion) as part of the London Underground PPP
- 2003:
- Dimetronic wins its first ERTMS contract for Spains High Speed network
- 2004:
- Invensys agrees a £2.7 billion refinancing, and begins to move towards its present structure
- 2005:
- Ulf Henriksson is appointed Chief Executive of Invensys
- 2007:
- Invensys Rail Systems renamed as Invensys Rail Group
- 2007:
- Westinghouse Rail Systems India becomes newest member of Invensys Rail Group
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