Abstract: A connector and gauge assembly for measuring liquid pressure and flow rate has an axially elongated integral tubular body with an externally threaded male end and an opposite female end. The tubular body defines an axial main conduit, and a test conduit generally transverse thereto. An internally threaded sleeve is rotatably mounted upon the body at the female end for connection of the main conduit to a source of liquid under pressure. A closure element is associated with the tubular body for resisting flow of liquid through the main conduit. A gauge of pressure and flow rate is mounted upon the tubular body in communication with the test conduit, the gauge having a display for indicating pressure and flow rate.

Abstract: In general, the invention features a spring assembly for a gauge comprising a hollow metal tube adapted to change in volume in response to differential pressures applied across its walls, the tube having a neck portion adapted to be connected to a fitting of the gauge, a body portion connected at one end to the neck portion, the walls of the body portions being flattened and their peripheral portions being compressed by cold working to a reduced thickness to thereby increase their yield point to a spring temper and their central portion being compressed relatively less than their peripheral portions to form an axially extending channel which provides for enhanced pressure transmission along the tube, and the other end of the body portion being sealed, the interior of the neck portion adapted to be in pressure communication with the fitting, and the interior of the body portion adapted to be in pressure communication through the channel with the interior of the neck portion, whereby a change in the pressure ap

Abstract: A pressure responsive spring element for a gauge is made from cold worked metal.