Patent ID: 9127935
Filing Date: 2015-09-08
Classification: G01B,G01C

Abstract:
1. A device comprising: a housing; a center light source mated to the housing configured to generate a center reference light line projected onto a surface; a left light source configured to generate a left reference light line projected onto the surface wherein the left light source is connected to a left rotational element; a right light source configured to generate a right reference light line projected onto the surface wherein the right light source is connected to a right rotational element; a power source for providing power to the center light source, left light source, and right light source; a gear system within the housing which controls the rotation of the left rotation element and right rotational element configured to move the left rotational element and right rotational element in unison and in opposite rotational directions; and wherein the movement of the left rotational element and right rotational element cause the left reference light line and the right reference light line to move in equal increments away from or towards the center reference light line.