Patent ID: 7140117
Filing Date: 2006-11-28
Classification: F41J,Y10S

Abstract:
1. A method of measuring a relative height and distance from a dartboard mounted on a wall, the dartboard having a perimeter edge, said method comprising the steps of: providing a housing having a back wall, a front wall, a first side wall, a second side wall, a top wall and a bottom wall, said back wall being arcuate and having a contoured surface adapted for being abuttable against the perimeter edge of the dartboard; providing a distance measuring assembly being positioned in said bottom wall of said housing and being adapted for determining a distance from a center mark indicator to a selectable point spaced from said housing; providing a laser pointer being mounted on said first side wall and defining said center mark indicator, said laser pointer being adapted for directing a point of light away from said housing, said laser pointer being angled with respect to said housing such that said point of light strikes a floor surface spaced 7′ 9.25″ from said first side wall when said laser pointer is positioned 5′ 8″ above the floor surface; positioning said back wall against said perimeter edge of the dartboard such that said bottom wall faces downward and said laser pointer is horizontally aligned with a bull's-eye of the dartboard; positioning said dartboard such that said distance measuring assembly indicates said laser pointer is 5′ 8″ from the floor surface; and making a toe line marking at a point wherein said floor surface intersects said point of light.