1371 in J. Raine (1859) 7 Et in..j sokeiren, j pari belowes,..emptis.
1844 H. Stephens I. 415 The share is always formed from a plate forged for the express purpose at the iron-mills, and known in the trade by the term sock-plate.
1893 in s.v These were wood plews,..an' hed a sock-guard to prevent t' sock comin' off.