Abstract: A damper valve includes a base, a valve blade pivotally mounted on the base and two serially arranged valve seats. Each valve seat comprises adjustable valve seat portions on opposite sides of a pivot axis of the valve blade, the valve seat portions being positioned on opposite sides of the blade. Each valve seat portion includes a stationary member fixed to the base, an adjustable element movable relative to the stationary member, and bolts fixing the adjustable element to the stationary member. Adjustment devices are provided for moving each adjustable element toward the valve element to provide a precise fit along the entire length of the valve seat. The valve seats and the valve blade define an annulus which can contain gas at a higher pressure than the fluid controlled by the valve, so that none of the controlled fluid flows past the valve.

Abstract: A damper valve includes a base, a valve element pivotally mounted on the base and adjustable valve seat portions on opposite sides of a pivot axis, the valve seat portions being positioned on opposite sides of the blade. Each valve seat portion includes a stationary member fixed to the base, an adjustable element movable relative to the stationary member, and bolts fixing the adjustable element to the stationary member. In addition, adjustment devices are provided for moving the adjustable element toward the valve element to provide a precise fit along the entire length of the valve seat.

Abstract: An apparatus for inserting a socket into a printed circuit board comprising a supporting structure, first and second resilient fingers attached to the supporting structure, and a socket holding mechanism. The resilient fingers are adapted to receive and releasably retain a socket therebetween at a socket retaining station. The socket holding mechanism is mounted on the supporting structure for movement from a first position on the side of the socket retaining station remote from the printed circuit board toward the printed circuit board along a path which passes through the socket retaining station and between the resilient fingers. As the socket holding mechanism passes through the socket retaining station, the socket is removed from the resilient fingers and coupled to such mechanism so the socket holding mechanism can move the socket to the circuit board.

Abstract: A universal joint is disclosed for rotationally coupling a pair of shafts, comprising identical yoke members having paired diametrically opposed axially extending arms telescoped into overlapped but circumferentially spaced relation, and coupling block means interposed between the arms and providing pivotal driving connection therebetween through stub shafts fixedly carried by the block means, the stub shafts projecting into bearing sleeves removably retained in apertures in the arms of the yoke members to permit articulation of the yoke arms relative to the stub shafts of the coupling block in transmitting rotary motion from one yoke member to the other.