The Collaborative International Dictionary of English v.0.48:

Cog \Cog\, v. t.
   To furnish with a cog or cogs.
   [1913 Webster]

   Cogged breath sound (Auscultation), a form of interrupted
      respiration, in which the interruptions are very even,
      three or four to each inspiration. --Quain.
      [1913 Webster]