Abstract: A body is provided including opposite ends, opposite sides and a top and a bottom. A pair of upstanding levers are pivotally secured, intermediate their upper and lower end portions, to opposite end portions of the body for limited oscillation about axes transverse to the levers and the body. Spring structure is provided for yieldingly biasing the upper ends of the levers apart and the body includes opposite side rows of elongated longitudinally spaced relatively insulated contacts projecting endwise outwardly and downwardly from opposite side portions of the bottom of the body. The lower ends of the levers include coacting opposite side depending conductive hooks opening longitudinally of the body toward the remote levers and corresponding side hooks of the levers are spaced apart in planes spaced slightly inwardly of the corresponding side contacts.

Abstract: Suction pressure is applied to a desirable location by a valve assembly having a flat gate element elastically deformed by a selectively controlled cam actuator to unblock a flow passage between inlet and manifold portions of the valve body. A sealing gasket is peripherally mounted on the manifold portion in enclosing relation to an area larger than the flow area of the inlet portion. A vent passage to the manifold portion is unblocked when the gate element is closed, to re-pressurize the manifold chamber.