Abstract: The safety shield of the invention consists of a plurality of vertical columns having horizontally disposed steps extending therefrom. The vertical columns are arranged in pairs along opposite walls of the trench. Horizontal sidewall members extend parallel to the walls of the trench and are located between the steps extending from the columns. Transverse bracing members are located between and supported by the columns of each opposed pair of columns. The transverse bracing members are pivoted at their midpoint and include pivotable clevises on opposite ends thereof to facilitate assembly and disassembly. Oversized holes formed on the steps of the vertical columns, horizontal sidewall members and transverse bracing members align with one another such that a single latchpin can be used to connect all three members together. Thus, the safety shield of the invention can be assembled quickly and easily.

Abstract: A body support apparatus including a pair of supporting implement for supporting the body weight of the user when in a seated position to relieve pressure on the spinal column, each implement including a base member, a height adjustable upright and an armrest carried by the upright, the upright being resiliently secured to the base, permitting universal movement of the upright, and the arm-rest, relative to the base.

Abstract: A disk harrow embodies a fore-and-aft extending center pole which hitches at one end to a tractor and has paired tool gang assembly units which extend laterally from opposite sides thereof. These units include tool gang carrying inner beams which are supported on transport wheels and are connected to said pole for horizontal adjustment about pivots spaced along the longitudinal axis of the pole, one behind the other. Adjustable length truss bars connected between the pole and the inner beams releasably lock said tool gang assembly units in a transport position generally perpendicular to the pole. The tool gang assembly units also include a tool gang carrying outer beam which is hinged to the inner beam to fold vertically thereover onto the pole when the units are perpendicular thereto. The spacing of the pivots provides sufficient clearance that the folded outer beams lie flat with their tools in close side-by-side relation on the pole for transport.