RICHARD J MILLER
Plumbers in Foxborough, MA

3972232, Aug 3, 1976

Apr 24, 1974

5/463522

Richard W. Miller - Foxboro MA
Gerald L. Felton - North Attleboro MA
Kenneth W. Petros - Norton MA

The Foxboro Company - Foxboro MA

G01F 132

73194VS

A vortex-shedding flow-sensing instrument comprising a flat-faced vortex-generating plate integral with a downstream sensor-bar having flat sides set back laterally with respect to the rows of vortices shed from the edges of the vortex-generating plate. The side surfaces of the plate are tapered inwardly at a moderate angle, and extend down a short distance to rear surfaces at right angles with respect to the direction of fluid flow. The downstream end of the sensor bar comprises a tail piece the side surfaces of which are tapered inwardly at a moderate angle, and extend downstream a short distance to a rear surface perpendicular to the direction of fluid flow. The sensor bar carries on oil-filled capsule having as side walls a pair of flexible diaphragms effectively in the plane of the sensor-bar side surfaces. These diaphragms transmit alternating vortex pressure pulses interiorly of the capsule to a sensing element in the form of a ceramic disc having piezo-electric properties. The resulting alternating voltage signal developed by this element is coupled through lead wires to an amplifier arranged to produce a flow signal suitable for transmission over relatively long distances.

4523477, Jun 18, 1985

Aug 4, 1983

6/520359

Richard W. Miller - Foxboro MA

The Foxboro Company - Foxboro MA

G01F 132, G01F 188

7386102

A vortex-shedding mass flowmeter which includes a shedding body mounted in a pipe containing a flowing fluid, a first detecting element that responds to the vortices generated when the fluid flows past a surface of the shedding body for producing a velocity signal proportional to the flow rate of the fluid, a second detecting element for sensing in a measuring plane that includes the surface of the shedding body where vortices are generated a moving fluid characteristic dependent on the product of fluid density and the square of the fluid flow rate, and electronic circuitry coupled to the outputs of the first and second detecting elements for producing therefrom a mass flow rate signal. In one preferred embodiment, the second detecting element is a pitot-type head device which senses a pressure differential between static and dynamic pressures existing at two locations on the measuring plane. In another preferred embodiment of the present invention, the second detecting element includes a drag body flow device which responds to the force being applied thereto by the flowing fluid.

4517847, May 21, 1985

Oct 27, 1982

6/437062

Richard W. Miller - Foxboro MA

The Foxboro Company - Foxboro MA

G01F 140, G01F 128

7386174

A target flowmeter includes a target body with an aperture through its impact surface, to equalize the forces generated on the target under both laminar and turbulent fluid flow conditions, as well as in the transition region therebetween. In a particular embodiment, the target body has an annular shape and is centered about the pipe center line, the size of the aperture being such that the target is acted upon by only those portions of the laminar and turbulent flow profiles having substantially similar shapes. Since the annular body is unaffected by the high velocity peak of the parabolic laminar profile, the force versus velocity relationship in the laminar flow range is approximately the same as in the turbulent flow range. This results in a more consistently accurate flow velocity measurement across the two flow regimes. Specific dimensional relationships between the size of the aperture and that of the pipe serve to optimize these results.