×

Digital protractor

  • US 20090038168A1
  • Filed: 03/10/2008
  • Published: 02/12/2009
  • Est. Priority Date: 03/09/2007
  • Status: Active Grant
First Claim
Patent Images

1. A digital protractor for measuring an angular displacement from a reference surface, said protractor comprising:

  • a substantially congruent pair of pivotally interconnected upper and lower arms, which arms are superposable upon one another, each arm having a pair of substantially parallel engagement edges extending longitudinally of said arm, one of said arms being engagable along an engagement edge thereof with the reference surface;

    an electronic sensor secured to said lower arm; and

    a digital readout device secured to said upper arm for operatively cooperating with said electronic sensor to measure and display the angular displacement from the arm engaging the reference surface to the other arm.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×