The history of the Sewing Machine By daisy1098765 Apr 18, 1845 elais howe invented april 1845 how the lock stich works Period: May 1, 1845 to Apr 18, 2011 time line After five years of continuous experimenting he succeeded in completing his invention in May. 1845 Aug 12, 1851 the treadle instead of a turn crank it became a foot treadle