Flat compass for marking large arcsand circles
OwnerAmaury D. Contrerasinventor
Life of this patent
Estimating the term…
Abstract
An improvement in a compass that marks large radius arcs is disclosed. The compass is for marking on flat surfaces like the ground and walls where higher degree of accuracy for the radius or circle is desired. More particularly, the present flat compass allows a person to create a virtually unlimited radius arc using a center point and a rigid arm with a marking tip. The flat compass uses a rigid flat ruler with an embeddable anchor, such as a nail, on one end and a marking tip on the other that keeps the rigid arm essentially parallel with the marking surface as the surface is being marked. The marking tip is movable along the length of the rigid flat ruler. Multiple rulers can be connected to increase the size of the arc that will be drawn.
Claims19
A flat compass for drawing large arcs comprising:
- an anchor having an elongated shank in combination with an enlarged flange having a means for the function of limiting how far the shank is set into an essentially flat surface;
- an elongated essentially flat beam secured on one elongated end to said anchor such that said elongated shank extends essentially perpendicular to the flat surface of said beam;
- said elongated essentially flat beam is configured to accept additional elongated essentially flat beam sections;
- said essentially flat beam has numeric marking that correspond to a known length or distance measurement system;
- said elongated shank is located at a zero location with said numeric marking, and
- a head that is adjustable securable on said essentially flat beam wherein said head has both a height adjustable marking means and a separate height adjustable tracking means that is spring loaded whereby said tracking means functions for maintaining said marking means in an essentially perpendicular relationship of said marking means with said essentially flat surface.
Dependencies are inferred from the claim text.