Abstract: A chain of end support sections are foldably linked together and hang vertically from either side of a horizontal support beam. The beam is attached to a pair of suspension cables through two motorized grip hoists rigidly attached to the beam and the cables then hang downwardly along the chains of end support sections to the ground. Work platforms extend horizontally between the end support sections and can move vertically independently of the end support sections. Means are provided for selectively attaching the ends of any work platform to the cables or the end support sections thereby enabling the independent movement of the end support sections and the work platforms during erection and disassembly of the scaffold system.

Abstract: A scoop made of a single paperboard blank. A back wall, with a transverse slot, is folded upward. Two side portions, with rear tabs, are folded upward and the rear tabs are folded inward behind the back wall. The top of the back wall is folded down causing the corners of the rear tabs to extend through the slot. Thus, the scoop is locked into its assembled position. A flexible container may be provided as a receptacle for the offensive materials and the soiled scoop.

Abstract: Paint is removed from brick work without destroying the dense, protective outer surface portion of the bricks by first scraping away heat-loosened paint and then lightly etching the brick surface to remove uniformly the paint residue by combined action of a high-velocity water stream and a relatively low-velocity, smaller stream of granular abrasive material directed at an angle into the water stream. The concentration of abrasive particles entrained in the water stream is varied while directing the water stream against the brick surface by moving the nozzle delivering the abrasive material stream closer to or farther from the water stream.

Abstract: The operating rod of an automotive door lock is provided with a connector member which, in turn, is engaged by a knob having a cavity to receive the connector member. The outside dimensions of the knob are larger than the aperture in the casing, thus preventing the knob from being depressed. The cavity in the knob is sufficiently large to permit the connector member and thus, the rod, to be in its advanced, or unlocked position, while remaining entirely within the knob. This arrangement permits one to pull upwardly on the knob thereby unlocking the door, but prevents one from manually depressing the knob or the connector member and thus, the rod, to thereby lock the door. A car key, however, can be inserted through the top of the cavity to urge the connector member and the rod to the retracted, locked position.

Abstract: A mobile siding scaffold system which comprises a roof vehicle and a scaffold. The roof vehicle is mounted on castors. Attached to the vehicle frame and extending over the front of the frame are two telescoping booms. These booms are provided with cables and suspension beam connection points, and enable the scaffolding to be carried along the sides and around the outside corners of buildings without the need to disassemble the scaffold. Adjustable outriggers are mounted on the frame so as to be able to extend in front of the frame for stability to prevent the weight of the scaffolding from upending the frame. For further stability, telescoping arms provided with counterweights may be mounted on the frame, so as to extend out to the rear of the frame. The scaffold includes the following: A horizontal platform suspension beam, which may be fastened to the cables and fastened to the support beam connection points, has holes aligned with the cables to allow the cable to pass through.

Abstract: Nozzles are mounted on the face of the plunger of a conventional hay baler for injecting a fluid into the mass of hay as it is compacted. The nozzles are connected to a tank holding the fluid through control valves and a metering chamber which serve to limit the period of injection to the compression stroke of the plunger and to limit the quantity of fluid injected.

Abstract: A test fixture for a circuit board testing system having a plurality of probes, some of which are mounted on one platen and others on another within the fixture. The platens are selectively advanced by use of a vacuum and thereby the probes associated with each platen are advanced into contact with the circuit board under test.