James Harry Keighly McCollum
1860-70 Born in Toronto
Before the first World War, he worked in Toronto as an electrician before moving on to internal combustion engines, including his version of the single-sleeve motor.
Possibly professor at Toronto University (needs confirmation)
1914 Visited England and had a meeting with Argyll Motors. Came to a sharing arrangement with Peter Burt concerning the Burt-McCollum sleeve-valve engine.
After WW1, it appears he may have moved to the U.S. to work with his brother or son, Henry John de Neville McCollum.
1930/38 Patent. VACUUM POWER CLUTCH. James Harry Keighley McCollum and Henry John De Neville McCollum, Long Branch, N. J., assignors to A. Parker-Smith, New York.[1]
He was married (wife's name possibly Florence) and had at least one male grandson.