Abstract: A picture retaining clip for use at the corners and along the sides of a back-loading picture frame. The clip may also serve as a means for hanging the frame. The clip is a strip of resilient material with a central portion having two ends bent away from it. When the clip is mounted at the corners of the frame, slots at each end of the clip mesh with a ridge at the rear of the frame. When the clip is mounted along the side, top or bottom of the frame, slots formed adjacent the central portion of the clip and slots formed at the ends of the clip mesh with raised ridges along the inside of the frame. A hole or slot in the central portion of the clip may receive hooks, nails, or wire for hanging the frame.

Abstract: A method is disclosed for the recovery of bitumen from a sludge. The sludge is diluted with water and subjected to high-shear agitation and aeration and the sludge settled to obtain an upper bitumen-containing froth layer and a lower sludge layer of reduced bitumen content. The recovery of bitumen is increased over that obtained with aeration and mixing with mild agitation or with aeration alone or with agitation alone.

Abstract: The disclosure concerns an arbor for securing a tool, or other rotating device to a chuck of a drill or the like. The arbor comprises a stamped member folded to have an upper wall with an opening therein to receive a screw in order to secure the tool to the upper wall, and side wings from opposite sides of the upper wall are bent down toward each other. The portions of the wings adjacent the upper wall are flat for being grasped by a tool, like a wrench. The upper portions of the wings further from the upper wall are curved to receive and guide the shaft of an inserted tool fastening screw. The lower portions of the wings shaped so that they meet each other along the lateral edges and so that they provide a chuck engaging member of hexagonal cross-section. The upper wall is cambered for driving the lower portions of wings together as the tool is tightened onto the arbor.

Abstract: A rotary stripper comprising a pair of spaced plates driven around a shaft and studs extending between the plates and radially spaced from the shaft; stripper members, each comprising generally hairpin shaped members, with the bend mounted around a stud and the legs extending past the shaft and beyond the periphery of the plates; the legs of each stripper member are respectively supported against excessive deflection by the drive shaft and on the other studs; retainer studs are provided radially outside the mounting studs to block separation of the stripper members from their respective mounting studs; the stripper members are laid down on annularly successive studs until the required height of the stripper is reached, whereby the stripper members are interleaved.