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Method and apparatus for measuring direction

  • US 3,944,798 A
  • Filed: 04/18/1974
  • Issued: 03/16/1976
  • Est. Priority Date: 04/18/1974
  • Status: Expired due to Term
First Claim
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1. In combination,a support,a working head having a direction axis,an articulated arm mounting the head to the support for movement with components of rotation about a plurality of mutually angulated axes to diverse angular orientations, and means responsive to articulation of said arm for generating a set of signals that collectively define the angular orientation of the head direction axis.

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