Abstract: A plumb post apparatus for retaining a mason's line for laying a brick course, the apparatus comprising two vertical posts each having two legs of adjustable length that pivot outward to form stabilizers. The legs are secured to adjacent sides of the posts, thus extending at right angles to each other. The posts can be secured via spikes through base plates at the bottoms of the posts and the legs are secured in place via stakes that are pivotally secured to the ends of the legs and which can be driven into a ground surface. Levels on adjacent sides of the posts indicate when the apparatus is in level disposition.

Abstract: The present invention is used to detect the grade on all slopes in highway construction using a degree gauge.

Abstract: An adaptable tip sensor is useful for detecting the angular tipping of an object relative to a selected frame of reference. The sensor comprises a case that defines a two dimensional straight sided V-groove in which a disk can roll. A sensing device detects the presence or absence of the disk within the apex of the V-groove. As long as the object does not tip to a predetermined angle, the disk remains in the V-groove apex, and the sensing device produces a first signal. If the object tips to the predetermined angle, the disk rolls out of the V-groove apex, and the sensing device produces a different signal. Fluid in the case damps spurious vibrations. A labyrinth and air bubble in the case enhance desired rolling of the disk when the predetermined tipping has occurred.

Abstract: A T-square attachment that is designed for use in conjunction with a conventional tape measure. The square is attached to the case of the tape measure in such a way that it forms a right angle with the extended tape, so as to enable a user to mark two parallel straight lines in a perpendicular direction at selected distances measured from the end of the tape. In order to complement the size of standard lumber used in construction in the United States, the ruler portion of the T-square is approximately 1 and 1/2 inches wide and about 8 inches long. These dimensions enable a user to mark both top and bottom plates with two parallel lines to delineate the exact location for the placement of each stud. A centrally located notch in the ruler is provided to line it up with the desired markings on the blade of the extended tape measure.

Abstract: A method of adjustment, by use of a gravity-operated angle measuring device, of the azimuth and/or elevation of the major axis of a light fixture having a normal operating position located at an inaccessible height, as on a tower holding runway approach lights. The method includes lowering the tower by rotating it about its base to a position wherein the light fixtures are accessible; measuring the vertical angle of the tower axis in the lowered position; adjusting the fixture to the desired angle relative to the tower axis by attaching the measuring device directly to the fixture; elevating the tower with the device still attached to the fixture; locking the angle shown on the device in the elevated position of the tower; again lowering the tower to read the angle locked on the device; and making any necessary adjustment of the light fixture axis relative to the tower axis so that the axis of a beam emanating from the fixture is directed at a predetermined azimuth and elevation.