Abstract: A machine and method for forming line pipe is disclosed wherein small diameter roll elements not exceeding five times the thickness of the blank form a tube. The roll elements positioned in a pyramid roll assembly are dynamically adjustable toward and away from each other to provide different size line pipe, or similar tubular articles. The segments of the upper roll elements are mounted on cantilever arms, the leading edge of blank being deflected against the upper curved surface of the arms during the final stages of forming. The deflection is maintained within the elastic recovery limit of the metal. A rigid frame mounts the cantilever arm and other components. The frame includes a plurality of vertical bed plates and corresponding upper frame plates and cross tie members. A pusher mechanism pushes the sheet blank through the pyramid roll assembly. A multi-walled tube may be formed by providing the required additional length to the blank and continuation of the forming beyond 360.degree..

Abstract: A roadway pole carrying an overhead luminarie or the like is mounted on a support comprising a stationary, hollow base member anchored to the roadway with hardware located within the base. The lower end of the pole is secured to the base by an upstanding collar, and the interior wall of the pole adjacent the collar is reinforced with a pair of sleeve members. Access to the mounting hardware is provided by an opening formed in the sidewall of the base. The opening is sealed by an access door that requires a special tool for its removal. In a break-away version of the support, the collar is secured to a wedge-shaped, break-away coupling. The coupling in turn is mounted in a seat formed on the stationary base member. The wedge-shaped coupling and seat constitute a locking angle and are held together by friction. An optional shear pin may be provided across the coupling-base interface to more securely seat the coupling.