Brandt Industries, Inc.

Other

Robert O Brandt

A method and apparatus are described for accurately measuring the weight of a moving stream of particulate material at different flow volumes. The apparatus includes a dynamic measurement device with a deflectable curved pan for measuring the amount of material flowing along a pathway; a supply source for discharging material along the pathway; and a gate valve having an inclined gate member with a leading edge controlling the volume of material discharged from the supply source, the valve reducing the height of discharge of the material above the dynamic measurement device proportional to the increase in the flow volume of material being discharged. A gate valve is also described that includes a gate member with a fully open position and a fully closed position, the valve aperture being open a width determined by the bridging characteristics of the particulate material being discharged when the gate member is in the fully closed position.

Precision dynamic measurement apparatus

The present invention entails a transverse type pressure averaging primary device that is designed to be mounted within a duct and designed to sense both total and static pressures of fluid flow passing within the duct. More particularly, the pressure averaging primary system of the present invention includes high and low pressure lines that extend transversely across the duct and which generally includes multiple pressure sensing points along the lines for sensing both total and static pressure. In the case of the high pressure line, the respective total pressure sensing points thereof are appropriately confined within cylindrical shrouds. Selected cylindrical shrouds include extensions that extend to and are secured to the low or static pressure line for structurally integrating and reinforcing the spans of the high and low pressure lines.

Transverse-duct insertion type pressure averaging primary

A nozzle pitot primary for effectively sensing and measuring differential or velocity pressure of a system of air or gas flowing within a duct or conduit. By determining differential or velocity pressure, it is appreciated that the air or gas flow can be readily determined. The nozzle pitot primary of the present invention comprises a nozzle designed to be installed within a duct or conduit with the nozzle including a constricting throat area relative to the duct or conduit in which the same is installed. Air or gas passing through the duct or conduit is directed through the nozzle so as to produce a generally uniform and predictable velocity profile within the nozzle downstream from the throat area therein. An array of static and total pressure pitots are provided in association with the nozzle and are spaced inwardly across a constricted area where the velocity profile is relatively uniform. Because of the relative uniform velocity profile about the area of the pitots, it follows that an accurate indication of fluid flow can be determined without the necessity of sensing differential pressure at multiple points across the nozzle's cross sectional area.

Nozzle pitot averaging primary

The present invention entails a branch averaging pitot system for sensing differential pressure within a system of air or gas and providing a differential flow signal to a flow transmitter forming a part of the air monitoring system of the present invention. The branch averaging pitots include an array of shrouded total pressure pitots strategically spaced about the cross sectional area of an air receiving duct assembly and down stream from a honeycomb type air flow straightening section. In addition, an array of static pressure pitots are also provided, and wherein the respective static and total pressure pitots are communicatively connected by separate manifolds internally within the air receiving duct assembly. Openings in the pitots are relatively small (0.030 inches to 0.060 inches), and said transmitter is adapted to continuously direct a flow of purging air therefrom back to and through the pitots in order to keep them open at all times.

Averaging pitot primary system

The present invention relates to a pneumatic flow measuring system for measuring fluid flow. More particularly, the disclosed preferred embodiment of the present invention is referred to as a square root extractor as the device basically functions to compute the square root of a pneumatic input signal by producing an output signal that is linear with flow or fluid velocity of a system being measured. Thus, although flow between two points may be basically defined as a square root function of a differential pressure between the same two points, the flow measuring device of the present invention utilizes a differential pressure input signal to produce an output signal that is linear with flow.

Pneumatic flow measuring system

The present invention relates to a pneumatic amplifier of the type having a main internal chamber with a thin imperviable member extending thereacross. The thin imperviable member responds to and amplifies a wide range of pressure input signals supplied to the main internal chamber of the pneumatic amplifier valve. In effect, the imperviable member separates the main internal chamber into two compartments. The first compartment receives the pressure input signals which are to be amplified, and the other compartment on the opposite side of the imperviable member receives a steady flow of air from an air supply. Consequently, the imperviable member assumes an operative profile or contour due to the air pressure present in each of the two compartments. A portion of the compartment channeling the air supply through the valve represents a positive and linear amplification of the particular pressure gain signal being applied to the valve. It was discovered that the particular gain of the pneumatic of the present invention could be varied and changed by effecting a change in the operative contour or profile of the imperviable member. To accomplish this, the pneumatic valve of the present invention includes a threaded shaft having a generally rounded head secured to the interior end thereof. By adjustably moving the threaded shaft, the generally rounded head engages the imperviable member and depresses or changes the contour of the valve to effectuate a change or varyance in gain.

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Garner, NC, United States of America

Robert O Brandt