Device for measuring the angle of orientation with reference to a known frame of reference between a first object having a first axis and a second remote destination

The present invention relates to devices for measuring the angle of orientation with reference to a known frame of reference between a first object having a first axis and a second remote destination, and more particularly to such devices used in the construction industry for installing water pipes, sprinkler pipes, drain pipes, electrical conduit, heating ducts, and the like, buildings, building frames and rafters, laying bricks, forming concrete work, and so on. A device for measuring the angle of orientation with respect to a known frame of reference between a first object having a first axis and a second remote destination comprises a first arm member defining a first longitudinal axis and an object engaging surface substantially parallel to the first longitudinal axis for engaging a first object. A second arm member is connected in pivotal relation to the first arm member at a primary joint for pivotal movement about a first transverse pivot axis intersecting the first longitudinal axis and defining a second longitudinal axis intersecting the first longitudinal axis and the first transverse pivot axis. A laser is mounted on the second arm member for projecting a laser beam along a laser beam axis parallel to the second longitudinal axis. A first angle measurer is mounted on the second arm member to measure and indicate the angle of the second longitudinal axis with respect to a fixed reference frame other than the first longitudinal axis.