Abstract: A gas metering valve is provided for selectively providing a series of different calibrated gas flow rates. The valve includes a valve body having a gas inlet, a gas outlet, a chamber situated between the gas inlet and gas outlet. The valve also includes a metering element located in the chamber. The metering element is formed to include a plurality of passageways for permitting gas flow from the gas inlet to the gas outlet. The metering element is movable relative to the valve body to position a selected passageway in communication with the gas inlet. The valve further includes a seal apparatus including a sealing disk in sliding contact with the metering element. The sealing disk has an aperture formed therethrough aligned with the gas inlet for sealing said chamber against the transmission of gas therethrough except when the metering element is oriented with the selected passageway in registry with the aperture in the sealing disk.

Abstract: A card edge connector 50 for electrically engaging a first and at least one other array of contact pads 46, 48 on a circuit board 40 comprises a first or inner subassembly 51 including housing member 52 having a first group of terminal members 20 disposed therein and a second or outer subassembly 71 including housing member 72 having at least one other group of terminal members 28 disposed therein. The first group of terminal members 20 is adapted to electrically engage the first array of contact pads 46 and the at least one other group of terminal members 28 is adapted to electrically engage the at least one other array of contact pads 48. The outer housing member 72 further including cavity means 86 adapted to receive the inner housing member 52 therein. In the preferred method of assembling connector 50, outer subassembly 71 is disposed over the inner subassembly 51 after the inner terminal members 20 have been electrically connected to their respective contact pads 46, typically by solder.

Abstract: A calibrated gas-metering valve is disclosed which includes a two-part valve body having a gas inlet, a gas outlet, and a metering element therebetween. The metering element has a first and a second hole therein, which first and second hole intersect and together define a passage for gas flow from the gas inlet to the gas outlet. A ball of a diameter approximately equal to the diameter of the first hole is press-fitted into the first hole so as to be positioned therein solely by the fitting engagement of its surface with the wall of the first hole. The ball is located adjacent the intersection of the first and second holes so as to define a region in the passage having a cross-sectional area less than the cross-sectional area of either the first or second holes. The position of the ball with respect to the intersection of the holes is fixed to achieve the desired gas-metering rate.