The Collaborative International Dictionary of English v.0.48:

Gimmal \Gim"mal\, n. [Prob. the same word as gemel. See Gemel,
   and cf. Gimbal.]
   1. Joined work whose parts move within each other; a pair or
      series of interlocked rings.
      [1913 Webster]

   2. A quaint piece of machinery; a gimmer. [Obs.]
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Gimmal \Gim"mal\, a.
   Made or consisting of interlocked rings or links; as, gimmal
   mail.
   [1913 Webster]

         In their pale dull mouths the gimmal bit
         Lies foul with chewed grass.             --Shak.
   [1913 Webster]

   Gimmal joint. See Gimbal joint, under Gimbal. Gimmer