Patent ID: 6508006
Filing Date: 2003-01-21
Classification: G01C

Abstract:
An apparatus for marking grade stakes driven into the ground for the purpose of facilitating formation of a level string line to establish a horizontal foundation for the construction of a masonry wall, said apparatus comprising:a) stake engaging means securable upon a stake and having retaining means to slidably accommodate and secure a vertically moveable member, b) a straight positioning rod elongated between top and bottom extremities defining the length thereof, and having a uniform rectangular cross-sectional configuration with consequently formed elongated flat surfaces including a front surface and contiguous stake-directed side surface, c) track means in lengthwise association with said stake-directed side surface and interactive with said retaining means to permit vertical sliding movement of said positioning rod, d) a scale of linear measurement indicia associated with said front surface, said scale facilitating repeat measurements of constant length, e) a rod-eye slidably associated with said front surface and adapted to receive a leveling beam from a distantly located laser transmitter and produce a visual and/or audible signal in response to receipt of said leveling beam, said signal dictating the elevational distance of said positioning rod above said horizontal foundation, and f) marking guide means associated with the bottom extremity of said positioning rod to facilitate placement of a mark upon said grade stake representing the location for tying a level string that tautly extends between sequentially contiguous stakes.