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Torque motor

  • US 5,473,298 A
  • Filed: 09/17/1993
  • Issued: 12/05/1995
  • Est. Priority Date: 09/18/1992
  • Status: Expired due to Term
First Claim
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1. In a force motor adapted to be mounted on a surface of a body, having an armature mounted for movement relative to said body along a line substantially parallel to said surface, having a magnetic structure, said structure having a first polepiece terminating in a first pole face arranged substantially perpendicular to said body and arranged in spaced facing relation to said armature to define a variable-length first working air gap therebetween, having a second polepiece terminating in a second pole face arranged substantially perpendicular to said body surface and arranged in spaced facing relation to said armature to define a variable-length second working air gap therebetween, and having a third polepiece terminating in a third pole face arranged substantially perpendicular to said first and second pole faces and arranged in spaced facing relation to said armature to define a fixed-length non-working air gap therebetween, a coil surrounding said third polepiece, and magnet means arranged in series with said first and second polepieces to oppositely polarize said first and second pole faces, the improvement which comprises:

  • clamping means operatively arranged between said structure and body for selectively permitting said structure to be slidably moved along said surface to adjust the lengths of said first and second working air gaps.

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