Abstract: A retrofit system includes a body, a cup and a valve. The body has a top wall and a plurality of side walls defining a opening and a chamber and is configured to be connected to a gas meter such that the chamber is in fluid communication with a chamber of the gas meter. An inlet channel is configured to be in fluid communication with an inlet of a diaphragm disposed within the gas meter and an outlet channel configured to be in fluid communication with an outlet of the diaphragm. The cup is disposed within an aperture located in the top wall and defines compartment configured to receive a radio frequency (RF) controller and a power supply. The valve is connected to one of the inlet or outlet channels and is electrically coupled to the RF controller and the power supply. The valve is configured to close in response to receiving an electrical signal from the RF controller.

Abstract: A retrofit system includes a body, a cup and a valve. The body has a top wall and a plurality of side walls defining a opening and a chamber and is configured to be connected to a gas meter such that the chamber is in fluid communication with a chamber of the gas meter. An inlet channel is configured to be in fluid communication with an inlet of a diaphragm disposed within the gas meter and an outlet channel configured to be in fluid communication with an outlet of the diaphragm. The cup is disposed within an aperture located in the top wall and defines compartment configured to receive a radio frequency (RF) controller and a power supply. The valve is connected to one of the inlet or outlet channels and is electrically coupled to the RF controller and the power supply. The valve is configured to close in response to receiving an electrical signal from the RF controller.

Abstract: An adjustable tangent assembly for a positive displacement diaphragm gas meter is provided with a cam on the stroke adjuster. Use of the cam results in a linear relationship between angular movement of the stroke adjuster and the stroke adjustment.

Abstract: A temperature compensated fluid meter includes a temperature transducer with a bellows that expands and contracts. Movement of a rod attached to a movable end of the bellows is coupled to a transmission assembly which includes a cylinder and a cone that have a transfer ring mounted between them. The actuator rod is interconnected with the transfer ring to move it substantially linearly and continuously along the axis of the cylinder in response to changes in the temperature of the fluid being measured. This changes the speed of rotation of the cone with respect to the cylinder for a particular volume of fluid as the temperature of the fluid changes. A cone shaft in which the cone is mounted is interconnected with the compensated index within the register so as to substantially linearly and continuously cause the index to record a temperature compensated fluid volume.

Abstract: A conformal coating and method for applying same to a printed electrical circuit board, components and leads for providing corrosion resistance. In a preferred embodiment, the conformal coating comprises a first coating layer of parylene which is vacuum deposited and removably bonded onto an ultra-clean surface of a printed circuit board including attached components and leads. Additionally, a second coating layer of a corrosion inhibiting viscous fluid is deposited onto the first coating layer to form a continuous, stratified, conformal coating which is sealed and corrosion resistant.

Abstract: A mounting adaptor for coupling a gas pressure regulator outlet to a gas meter inlet includes a plate having through-bores alignable with internally threaded blind holes which surround the meter inlet in the meter wall. The plate has a planar surface surrounding the outlet opening of the regulator and is adapted for contact engagement with a planar surface on the meter exterior wall surrounding the inlet opening. A groove in the planar surface of the plate holds a sealing ring to effect a seal. In an alternate construction, a tube extends from the plate into the meter inlet opening and an annular groove on the tube exterior holds a sealing ring for engagement with a cylindrical wall extending into the meter from the inlet opening.

Abstract: A diaphragm-type gas pressure regulator wherein the valve subassembly is constructed as a drop-in unit. The valve subassembly includes a diaphragm lever and a plunger valve. A seat disk is inserted in a cavity at a first end of the plunger valve and the rounded pivot end of the lever is inserted in a groove at the other end of the plunger valve. The plunger valve is then inserted into a valve guide and a lever pin is installed through the guide and the lever, thereby capturing the subassembly. This subassembly is then placed into the regulator body and a mounting plate of the valve guide is screwed down into the regulator body. The lever is lifted up and its actuator end is inserted through an opening at the bottom of the valve stem of the regulator's diaphragm assembly. An orifice member is then threadedly installed into the regulator body inlet, the end of the orifice member having a valve seat which becomes seated in the end of the plunger valve guide.

Abstract: A conformal coating and method for applying same to a printed electrical circuit board, components and leads for providing corrosion resistance. In a preferred embodiment, the conformal coating comprises a first coating layer of parylene which is vacuum deposited and removably bonded onto an ultra-clean surface of a printed circuit board including attached components and leads. Additionally, a second coating layer of a corrosion inhibiting viscous fluid is deposited onto the first coating layer to form a continuous, stratified, conformal coating which is sealed and corrosion resistant.

Abstract: A turbine meter used for measuring the volume of fluid flowing through a conduit includes an elongated housing having an upstream end and a downstream end and a rotor mounted within the housing. A plurality of turbine blades are mounted on the rotor at an angle with respect to the axis of rotation of the rotor which causes each of the rotor blades to have a high pressure surface which faces toward the upstream end of the housing. Each of the rotor blades also has a trailing edge closest to the downstream end of the housing. An extension is included at approximately the trailing edge on the high pressure surface of at least one and preferably a plurality of the rotor blades. The extension has a length and forms an angle with respect to the high pressure surface of the rotor blade on which it is mounted which causes the percentage of error of the accuracy of the meter across a chosen operating range of the meter to be within predetermined limits.

Abstract: The present invention relates to a pulse conditioning circuit including a first switch terminal having a first leg connected to a DC power source and a second leg. A second switch terminal is also provided having a first leg connected to an electrical ground and a second leg electrically connected to the second leg of the first switch. Pulses resulting from switch closures at the switch terminals are provided at the node where the second legs of both switch terminals are coupled. This node is preferably coupled to a low-pass filter, which is further coupled to a latch circuit providing a conditioned pulse output. The latch circuit is adapted to provide a first logic state output when the input of the latch is provided with a high logic state and a second logic state output when the input of the latch is provided with a low logic state. The high logic state input is provided when a switch connected to the first switch terminal is closed.

Abstract: An improved rotary fluid meter is provided having expansion chambers for conditioning pressure pulses that may occur in the flow of fluids. The pressure pulses, which inhibit the meter's ability to accurately measure, may originate from within a metering device or from without it. The pressure pulses may be generated upstream of the meter. Fluid flows into the meter through a fluid flow conduit. At least one flow conditioning chamber which is of such a volume and a shape as to enable it to substantially dampen pressure pulses so as to improve the accuracy of the rotary meter is provided along the fluid flow conduit.

Abstract: A valve arranged for radial fluid flow from its inlet to its outlet has a spring-loaded diaphragm covering a valve cage member having a central opening communicating with the valve inlet surrounded by a plurality of peripheral openings communicating with the valve outlet. The valve cage member is downwardly concave and a valve top member closing off the valve body has an upwardly concave surface which is substantially the inverse of the concave surface of the valve cage member. Accordingly, the diaphragm moves from a zero flow configuration against the valve cage member to a full flow configuration against the valve top member symmetrically without stretching.

Abstract: A gas turbine meter includes a measuring cartridge which has a measuring rotor that rotates in one direction at a speed approximately proportional to the velocity of gas flowing through the meter and a reference rotor mounted downstream of the measuring rotor which rotates in the opposite direction from the measuring rotor. An inlet flow straightener upstream of the measuring rotor causes gas to flow substantially axially within the meter, and a reference flow straightener mounted between the measuring rotor and the reference rotor also causes gas to flow substantially axially within the meter. The inlet flow straightener and the reference flow straightener are constructed so that a measurement of the accuracy of the meter can be conducted without measuring differences in pressure and temperature between the locations of the measuring rotor and the reference rotor.

Abstract: An arrangement and method for processing a cyclically varying signal to determine the time between equivalent points of successive signal cycles. A comparator receives the signal at one of its differential input terminals, the other input terminal receiving a reference voltage generated by a computer. The output of the comparator is coupled to a timer toggling input. The computer generates the reference voltage at either a trigger level or a level below the range of the signal. At first, the reference voltage is provided at the trigger level and after the comparator changes state, thereby starting the timer, the computer changes the reference voltage to the low level below the signal range. The computer changes the reference voltage back to the trigger level after a predetermined number of signal cycles, so that the next time the signal reaches the trigger level the timer is stopped.