Abstract: An infrastructure monitoring assembly includes a nozzle cap, the nozzle cap comprising a metallic material; an antenna cover, the antenna cover attached to the nozzle cap, the antenna cover comprising a plastic material, the antenna cover defining an antenna cavity; and an antenna extending into the antenna cavity. An infrastructure monitoring assembly includes a fire hydrant, the fire hydrant defining a nozzle; a nozzle cap, the nozzle cap comprising a metallic material, the nozzle cap attached to the nozzle and sealing the nozzle; an antenna cover attached to the nozzle cap, the antenna cover comprising a plastic material, the antenna cover defining an antenna cavity; and an antenna disposed within the antenna cavity.

Abstract: An infrastructure monitoring assembly includes a nozzle cap, the nozzle cap comprising a metallic material; an antenna cover, the antenna cover attached to the nozzle cap, the antenna cover comprising a plastic material, the antenna cover defining an antenna cavity; and an antenna extending into the antenna cavity. An infrastructure monitoring assembly includes a fire hydrant, the fire hydrant defining a nozzle; a nozzle cap, the nozzle cap comprising a metallic material, the nozzle cap attached to the nozzle and sealing the nozzle; an antenna cover attached to the nozzle cap, the antenna cover comprising a plastic material, the antenna cover defining an antenna cavity; and an antenna disposed within the antenna cavity.

Abstract: A method and apparatus for measuring a fluid and determining a leak comprising the steps of providing a meter and a meter register coacting with the meter. When a leak is detected, a signal is transmitted from the meter register regarding fluid consumption. The transmitted signal indicates a leak either when the measured flow rate remains a fixed volume over a fixed period of time, or the measured flow rate exceeds a threshold value.

Abstract: A volumetric fluid meter has a cylindrical measuring chamber with a lateral wall, a bottom (1) and a lid (3), a lower cylinder (4) and an upper cylinder (5), having the same diameter, which is less than the diameter of the chamber. An inlet orifice and an outlet orifice (8) respectively admit fluid to and evacuate fluid from the chamber. A cylindrical piston (11) is disposed eccentrically and guided kinematically in the chamber and effects an oscillatory movement in the chamber as a result of the displacement of a volume of fluid. A fixed partition (9) between the inlet orifice and the outlet orifice, lies radially between the lateral wall and the lower and upper cylinders, and lies axially between the bottom and the lid. The meter further includes a vertical groove (17) extending at least partly along the lower and upper cylinders and is in communication with one of the inlet and outlet orifices, and is situated in the vicinity of said fixed partition.

Abstract: A piston-type quantity meter including a metering chamber having a bottom, a cylindrical chamber shell, a cover, a central journal, a guide ring, two inlet opening formed, respectively, in the chamber bottom and the chamber cover, and a radial outlet opening formed in the chamber shell, an annular piston located in the chamber interior and having a cylindrical piston skirt, guide slot means formed in the piston skirt and corresponding to a width of separation wall located in the metering chamber for pinning the piston on the separation wall, and a radial outlet opening associated with the outlet opening formed in the chamber shell, and a seal strip for sealing at least one of a slit formed between the inner surface of the chamber shell and an outer surface of the annular piston, and a slit formed between the inner surface of the piston and the guide ring.

Abstract: An oscillating flowmeter including a measuring chamber having a bottom, a cylindrical jacket, a central journal, a guide ring, a separating wall, and inlet and outlet openings, and a piston located in the measuring chamber and having a bottom, a cylindrical skirt, at least one pilot journal engageable with and rotatable about the central journal of the measuring chamber, and a guiding slot extending in the skirt and the bottom and up to separating wall of the measuring chamber, with at least one of the central journal of the measuring chamber and the pilot journal of the piston being formed as a resiliently pliable member.

Abstract: Device for measuring liquid volume in the manner of a cylindrical piston meter with a cylindrical measuring chamber with connecting channels running perpendicularly to the cylinder axis of the measuring chamber and with a cylindrical piston inserted eccentrically into the measuring chamber and performing a wobbling movement, said piston having an H-shaped cross section and a through opening for engagement into a separating wall projecting into the measuring chamber, with the characterizing feature that the cylindrical piston is hydraulically tensioned by the inflowing liquid in the measuring chamber and the pressure differential on the outer and inner jacket surfaces of the cylindrical piston tends toward zero.

Abstract: A measuring device for a liquid meter with oscillating piston comprises a hollow chamber pierced with two apertures and limited by a cylindrical side wall, a bottom and a lid; a piston enclosed in said chamber and held movably, along a partition wall about a well. This device further comprises at least one groove, made in the corners formed between the bottom and the side wall of the chamber or the well or the piston, that opens into the hollow of the chamber, in a space formed between the well and the side walls, and is designed to receive deposits of particles introduced into said device by the liquid to be metered. The device can be applied in particular to water metering. FIG.

Abstract: A volumetric water meter of the type having an eccentric piston oscillating in a cylindrical chamber has a drive peg (64) on the piston engaging a rotor arm (50) which rotates about the chamber axis to drive an external register or the like. The drive peg is offset from the piston axis by that amount necessary to compensate for the periodic variation in angular velocity of the piston. The likelihood of the peg becoming disengaged from the rotor arm is thus considerably reduced.

Abstract: A cylindrical chamber (1) for an oscillating piston type of liquid counter comprises notably a biconcave fixed partition wall (9) and grooves on the lower and/or upper edges of the piston and, as the case may be, on the small cylinders of the chamber 1. The disclosure can be applied to the metering of liquid and, especially, to the metering of water.

Abstract: A flowmeter measuring chamber having a generally cylindrical outer wall, a generally cylindrical inner wall, and a piston, having a tubular wall disposed between the inner and outer walls and arranged to oscillate within the outer wall, is provided with a mechanism for controlling movement of the tubular wall. That movement is controlled so that a capillary space is maintained between the tubular wall and the inner wall and between the tubular wall and the outer wall at all positions of the piston and contact between the tubular wall and the inner and outer walls is prevented.

Abstract: A modular oscillating piston-type fluid meter including a plurality of three or more oscillating piston measuring modules in stacked relationship to each other, each of the measuring modules having a piston operatively connected for synchronous, conjoint rotation with the pistons of adjacent measuring modules. The measuring modules are substantially identical to each other and include a body portion which defines a cylindrical chamber. Outlet and inlet ports communicate with the cylindrical chamber. Fluid is supplied to the ports by internal or external manifolding conduits.