The Collaborative International Dictionary of English v.0.48:

Crampoons \Cram*poons"\ (kr[a^]m*p[=oo]nz"), n. pl. [F. crampon,
   fr. OHG. chramph crooked; akin to G. krampf cramp. See
   Cramp,n., and cf. Crampon.]
   1. A clutch formed of hooked pieces of iron, like double
      calipers, for raising stones, lumber, blocks of ice, etc.
      [1913 Webster]

   2. Iron instruments with sharp points, worn on the shoes to
      assist in gaining or keeping a foothold.
      [1913 Webster]