Abstract: A percussion drum assembly comprising, in combination an annular shell having a vertical axis, and upper and lower flanges extending toward that axis; upper and lower drum heads and annular retainers for the heads; vertically extending adjustment members operatively threadably connected to the flanges; and shoulders that are displaced vertically to bear on the retainers.

Abstract: A percussion drum assembly comprising, in combination an annular shell having a vertical axis, and upper and lower flanges extending toward that axis; upper and lower drum heads and annular retainers for the heads; vertically extending adjustment members operatively threadably connected to the flanges; and shoulders that are displaced vertically to bear on the retainers.

Abstract: A multiple gauge assembly for establishing vehicle wheel rim and tire sizes to prevent interference with vehicle structure facing the wheel, as during directional turning of the wheel on a vehicle wheel mount, about a pivot axis angled relative to the wheel axis, comprising a first adjustable gauge to establish a rim edge radial dimension, from the wheel axis, a second adjustable gauge to establish a rim offset (back spacing) dimension in a direction generally parallel to the wheel axis, and a third adjustable gauge to establish a tire peripheral dimension generally parallel to the wheel axis, whereby clearance between the wheel and vehicle structure can be predictively ascertained, as during wheel turning, prior to installation of the wheel on the mount.

Abstract: A multiple gauge assembly for establishing vehicle wheel rim and tire sizes to prevent interference with vehicle structure facing the wheel, as during directional turning of the wheel on a vehicle wheel mount, about a pivot axis angled relative to the wheel axis, comprising a first adjustable gauge to establish a rim edge radial dimension, from the wheel axis, a second adjustable gauge to establish a rim offset (back spacing) dimension in a direction generally parallel to the wheel axis, and a third adjustable gauge to establish a tire peripheral dimension generally parallel to the wheel axis, whereby clearance between the wheel and vehicle structure can be predictively ascertained, as during wheel turning, prior to installation of the wheel on the mount.

Abstract: A guard for placement in front of, or across, a swimming pool skimmer opening to prevent leaves and other floating debris from entering the skimmer opening. The guard is an elongate body of open mesh-like material having fastening tabs on opposite ends for attachment of the body across the swimming pool skimmer opening, and traps leaves and other floating debris to prevent the debris from entering the skimmer opening.

Abstract: A lightweight but strong two-piece wheel has an outer annular rim with a separate center section secured therein by separate fasteners which are hidden from view when the wheel is in use. The preferred fasteners are threaded bolts extended through openings in the rim and into pre-tapped holes in the center section, but bolt and nut assemblies or rivets may be used in alternate embodiments. The annular rim and center section preferably are made of lightweight materials, including aluminum and plastic. The construction enables the center section to be fastened to the rim in different axial positions within the rim, and permits inexpensive substitution of different center section designs in a common rim design. The process of making the wheel includes heat shrinking the rim onto the center section in a desired axially adjusted position and then applying the fasteners to secure the rim and center section together.