Abstract: A straddle adapter includes first and second plates and a side end. The side end joins the first and second plates at an edge such that the first and second plates are spaced apart and substantially parallel to each other. An edge of a printed circuit board is received between inner surfaces of the first and second plates. The outer surfaces of the first and second plates include snap connectors or other structure for mounting separate first and second edge connectors thereto. The adapter maintains the edge connectors at a predetermined separation distance. The inner surfaces of the first and second plate include deformable rails that deform as the edge of the circuit board is inserted between the first and second plates. The deformable rails compensate for variations in thickness of the circuit board and secure the adapter to the circuit board.

Abstract: A jet impeller mixer-agitator having a shaft adapted for rotation by a power source, a hub communicating with the shaft and at least one hollow blade fixed to the hub, the hollow blade having a fluid entrance opening on the effective face of the blade and a fluid exit opening on the non-effective face of the blade with a fluid passage connecting the fluid entrance opening and the fluid exit opening so that upon rotation of the shaft the fluid is directly forced into the fluid entrance opening, through the fluid passage and out of the fluid exit opening.