Coat of arms of Coys

The blazon

sa. on a chev. betw. three spears heads ar. as many cross crosslets of the first. — Crest, on a wreath, clouds ppr. issuing rays or, out of which an arm, erect, grasping a snake, entwined round the arm, all ppr.

A blazon is the description of a coat of arms in the technical language of heraldry. The drawing comes from that text, and from nothing else.