Abstract: A valve comprising a valve housing having a flow passage extending through the valve housing and a cavity communicating with the flow passage, a valve seat in the flow passage, a diaphragm extending across the cavity to define a control chamber on one side of the diaphragm and a valve element for controlling the flow of fluid through the flow passage. The valve element is mounted for pivotal movement about primary and secondary pivotal axes. The opening and closing of the valve element is controlled by the pressure in the control chamber.

Abstract: An automatic controller comprising a supporting structure, a plurality of adjustable contacts, and a selector mounted for movement on the supporting structure for sequentially engaging each of the contents. The adjustable contacts are mounted on the supporting structure for movement relative to each other along a path from a relatively stacked condition to a relatively fanned out condition. In the fanned out condition, each adjustable contact can project beyond at least one adjacent adjustable contact a variable amount so that the extent of exposure of each adjustable contact can be adjusted. The selector sequentially engages the exposed portions of the contacts to sequentially make and break a plurality of circuits.