Abstract: An expansion dowel assembly is adapted to secure fastening plates in spaced relation onto a structure. The expansion dowel assembly includes an axially extending sleeve-like member including an expansion section arranged to be secured into the structure and a collar section. The collar section engages the facing plate between a bearing and an abutment. An axially extending part of the collar section between the bearing and the abutment is arranged to collapse in the axial direction so that the space between the bearing and the abutment corresponds to the wall thickness of the facing plate. The axially collapsible part permits the expansion dowel assembly to be used with facing plates of different thicknesses.

Abstract: A device for adjustably mounting facing plates on a structure includes an elongated L-shaped supporting member made up of a first leg or web and a second leg or web. One surface on each of the first and second legs of the supporting member is toothed. An abutment also having a toothed surface is arranged to intermesh with the toothed surface on the first leg of the supporting member. The toothed surface of the second leg extends in the long direction of the supporting member and intermeshes with a similar toothed surface on a supporting plate. Supporting bolts are connected to the supporting plate and project into receiving holes in the facing plates. The second leg of the supporting member has an opening through which one of the supporting bolts can pass. For aligning adjacent facing plates the transversely extending dimensions of the opening in the second plate are selected as multiples of the diameter of the supporting bolts.

Abstract: A rotating unbalanced weight vibrator is provided. The vibrator comprises a vibrator housing defining and lying on a first axis, and a motor housing having two ends and being normally generally nonconcentrically arranged within the vibrator housing so as to define and lie on a second axis normally inclined relative to the first axis. The motor housing includes a stator extending radially outwardly from the second axis, a drive shaft extending through the stator along the second axis, and a rotor connected to the drive shaft at one of the ends of the motor housing. A universal joint coaxial with one of the axes connects the vibrator housing with the other end of the motor housing so as to preclude rotational movement of the housings relative to each other while permitting orbital movement of the one end of the motor housing about the first axis in response to rotation of the rotor.