Robert McCormick invented a hempbrake, but it was his son Cyrus who came up with this machine
[DOC] [TLE] Cyrus McCormick - Wikipedia [PAR] Cyrus Hall McCormick (February 15, 1809  May 13, 1884) was an American 
inventor and ... McCormick claimed he had really invented his machine in 1831, 
but the ... Their products came onto the market just as the development of 
railroads ... Cyrus McCormick was an uncle of Robert Sanderson McCormick (
son-in-law of... [DOC] [TLE] Cyrus McCormick | American industrialist and inventor | Britannica.com [PAR] Oct 21, 2016 ... McCormick was the eldest son of Robert McCormicka farmer,... ... reaping 
machine.