Abstract: A multicoil tube type pressure gauge arranged for direct drive of the gauge pointer and for safely handling overpressure in the event of Bourdon tube rupture comprising a casing of round configuration defining a planar upright main chamber, with the casing being indented rearwardly adjacent the axial center of the gauge to define a supplemental chamber, a mounting plate that is common to all the working parts of the gauge secured to the gauge casing over the supplemental chamber and mounting cantilever fashion a tubular spool journaling the gauge pointer shaft, a multicoil Bourdon tube encircling the spool having its sealed end secured to the shaft within the supplemental chamber, and a pressure connection fitting in the form of a connection block anchored to the mounting plate and having a pressure cavity to which the Bourdon tube other end is sealingly secured with its bore in communication with the fitting pressure cavity, with the Bourdon tube direct driving the gauge pointer shaft; the working parts of t

Abstract: A pressure transducer in the nature of a differential pressure transmitter including an instrument housing defining a chamber in which is mounted a sensing transducer one of several known types powered to provide a gauge signal that is to be supplied to instrumentation such as a controller or recorder, with the pressure sensing arrangement of the instrument being in the form of two oppositely coiled bourdon tubes mounted one on either side of the sensing transducer, with like ends of the tubes each mounting an output lever, which levers are respectively resiliently connected to the movable element of the transducer and in an oppositely acting manner, with the other ends of the respective tubes being separately connected to a mounting block arranged to provide for connection of the respective tubes to separate, externally located, sources of pressure fluids, and with one of the output levers being adjustable as to length for calibrating the instrument so that the action of the two tubes on the sensing transduc

Abstract: A differential pressure gauge of the type comprising a controlling magnetic helix device carrying a pressure indicating pointer, the position of which is controlled by a magnet magnetically coupled to same and mounted on the free end of a helically coiled bourdon tube exposed to differential pressures within the gauge and anchored in the gauge housing at its other end for this purpose. The magnet has a planar pole face paralleling the axis of the helix and defines a magnetic axis that is normal to and intersects the helix axis. The gauge housing defines an integral one piece pressure wall that separates and physically seals the helix from the magnet and bourdon tube and defines within the gauge housing pressure cavity an operating space within which the magnet and its supporting bourdon tube are mounted and operate.

Abstract: A pressure gauge having two coaxial helical bourdon tubes interconnected at the pointer ends and coupled to the pointer, with an inlet line for each tube permitting fluid flow through both tubes. A valving arrangement for operation as a pressure gauge by blocking one inlet line retaining the fluid under pressure in the tubes, and for flushing the tubes by opening both inlet lines and moving a fluid through the tubes.