Abstract: A process of producing a photoresist pattern on a circuit board including applying a casein based photoresist film of a thickness of at least 4.0 micrometers to a circuit board, air drying the film, exposing the dried film to actinic radiation through a photomask and developing the exposed photoresist film with soft water to wash away the unexposed areas of the film, thereby leaving an etch resistant pattern of photoresist on the circuit board.

Abstract: An automatic table height control for a combine harvester including a height sensing assembly and a control system. The height sensing assembly includes a finger support shaft rotatably journaled on the bottom of the table. A spring is provided to rotate the shaft in one direction. A plurality of ground engaging fingers are pivotally connected to the finger support shaft. A lost motion connection is provided to limit rotation of the finger support shaft relative to each finger. An iron vane is attached to one end of the finger support shaft. A pair of proximity switches are mounted on the crop harvesting table adjacent the path of movement of the iron vane. When the vane is close to both proximity switches, they are open. When one of the ground engaging fingers rotates the iron vane away from one proximity switch that switch closes and energizes a relay in the control system that energizes a solenoid on the header height control valve to raise or lower the table.

Abstract: A cargo container door construction is disclosed. The construction utilizes a relatively thin sheet metal door skin having a plurality of formed-in longitudinally extending stiffener grooves, with the door edge parallel to the grooves being formed into stiffener edges comprising a lip with a recess on its inner side. One such edge supports hinges which connect with a surrounding frame of a cargo container. The two remaining edges of each door lying perpendicular to the grooves, are each stiffened by an elongated bar and plate which are welded continuously to the edge of the skin and which form closed end walls on the grooves. The bar and plate establish edges which are similar to the lip and recess formed edges and the sides of the door, so that a uniform peripheral edge results. The lip and recess at each edge seat a gasket for sealing the door or pair of doors with a cargo container frame.