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Two Plane Protractor and Display Device

  • US 20160061576A1
  • Filed: 08/27/2015
  • Published: 03/03/2016
  • Est. Priority Date: 08/27/2014
  • Status: Abandoned Application
First Claim
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1. A two plane protractor for use in combination with a pair of trim pieces to determine miter and bevel angles for installing adjoining pieces of molding and trim, said device comprising:

  • a base;

    a pair of wall angle measurement arms pivotably mounted to said base and interconnected to one another through a gear assembly that allows said wall angle measurement arms to be angularly adjusted in unison relative to one another in a first degree of freedom;

    a pair of spring angle measurement arms attached respectively to said wall angle measurement arms for rotating in a second degree of freedom about respective longitudinal axes of said wall angle measurement arms, each spring angle measurement arm for attaching to and holding a respective trim piece;

    a first sensor for measuring angular displacement between said first and second wall angle measurement arms, which represents the wall angle of two adjoining walls with which said wall angle measurement arms are respectively engaged;

    a second sensor for measuring rotational tilt of one of at least one said spring angle measurement arms about said longitudinal axis of said wall angle measurement arm to which said spring angle measurement arm is attached, which measured rotational tilt represents the spring angle between a ceiling and a pair of adjoining walls with which the trim pieces held by said spring angle measurement arms are respectively engaged;

    a processor for calculating bevel and miter angles based upon the sensed wall and spring angles; and

    an electronic display communicating with said first and second sensors and said processor for displaying the measured wall and spring angles and calculated bevel and miter angles.

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