A system for assisting in guiding of an aircraft maneuvered by an aircraft tractor on the ground, the system including at least one projection device including a laser generating a laser beam fixed to an anchor point of the fuselage of the aircraft. A fixing mechanism is configured to fix the projection device to an anchor point of the fuselage, the laser beam from each laser projector then plotting a light trace on the ground to be used to assist in guiding the aircraft on the ground. A camera can film the light trace on the ground. A remote display device includes a screen, the display device being positioned on the aircraft tractor for the screen to be visible to an operator of the aircraft tractor, each projection device being connected to the display device, the display device being configured to display the image from each projection device camera.

A leveling device coupler assembly that includes a coupling head and a joint assembly coupled to the coupling head. The joint assembly can include a first and second rotatable coupling. The leveling device coupler assembly can also include a base coupler coupled to the joint assembly, with the base coupler and coupling head being coupled on opposing ends of the joint assembly. The leveling device coupler assembly can also include an electronic coupler assembly leveling device configured to at least detect a configuration status of the leveling device coupler assembly.

A leveling device coupler assembly that includes a coupling head and a joint assembly coupled to the coupling head. The joint assembly can include a first and second rotatable coupling. The leveling device coupler assembly can also include a base coupler coupled to the joint assembly, with the base coupler and coupling head being coupled on opposing ends of the joint assembly. The leveling device coupler assembly can also include an electronic coupler assembly leveling device configured to at least detect a configuration status of the leveling device coupler assembly.

The present invention provides a device (100) for suspending a plumb line over a corner region of a wall to be built, comprising an elongate support member (102) having a first end region (104) and a second end region (106); a first locating region (108) disposed proximal the first end region for locating the device on a first support surface; and a second locating region (112) disposed between the first end region and the second end region for locating the device on a second support surface, wherein the first locating region and/or the second locating region is/are selectively movable in at least a longitudinal direction relative to the elongate support member. A kit and method of suspending a plumb line over a corner region of a wall to be built are also provided.

The present invention provides a device (100) for suspending a plumb line over a corner region of a wall to be built, comprising an elongate support member (102) having a first end region (104) and a second end region (106); a first locating region (108) disposed proximal the first end region for locating the device on a first support surface; and a second locating region (112) disposed between the first end region and the second end region for locating the device on a second support surface, wherein the first locating region and/or the second locating region is/are selectively movable in at least a longitudinal direction relative to the elongate support member. A kit and method of suspending a plumb line over a corner region of a wall to be built are also provided.

A foundation shift detection device includes a foundation portion attached to a foundation to be monitored, a base portion attached to a base adjacent to the foundation and supporting the same, and a rotary indicator attached to the base portion and adapted for rotation responsive to displacement of the foundation relative to the base. The rotary indicator is visible to a casual or walking inspection from a moderate distance, as by a human inspector making a walking inspection of a number of such devices.

A laser level receives information describing a series of install points. The laser level than projects one or more laser beams at the install point(s), such as a planar laser beam along the run and a targeting laser beam at the point selected by the user. After the user finishes work on a first install point, the user can instruct the laser level to project the targeting laser beam at the next point, such as the user sending the instruction wirelessly.

A string line apparatus is disclosed. The apparatus may include a cylindrical elongated member having an elongated member body, an elongated member proximal end and an elongated member distal end. The elongated member may be shaped as a nail or a screw. The apparatus may further include one or more protruding arms that may be perpendicularly attached to the elongated member body. Each protruding arm may include an arm body, an arm proximal end and an arm distal end. An arm proximal end diameter may be greater than an arm body diameter. The apparatus may further include a fastener configured to removably attach to the elongated member body via the elongated member distal end.

A string line apparatus is disclosed. The apparatus may include a cylindrical elongated member having an elongated member body, an elongated member proximal end and an elongated member distal end. The elongated member may be shaped as a nail or a screw. The apparatus may further include one or more protruding arms that may be perpendicularly attached to the elongated member body. Each protruding arm may include an arm body, an arm proximal end and an arm distal end. An arm proximal end diameter may be greater than an arm body diameter. The apparatus may further include a fastener configured to removably attach to the elongated member body via the elongated member distal end.

The laser measuring device is a portable, battery-operated laser measuring tool that projects a plurality of illuminated dots when activated. The plurality of illuminated dots are arranged in a straight line and the laser measuring tool can be positioned so that the spacing between adjacent illuminated dots is 16 inches or 24 inches. The laser measuring tool can be aimed at a wall, floor, lumber or other object upon which it is desirable to have a plurality of evenly spaced illuminated dots projected.