Fischer & Porter Company

Harold W Metzger

Peter J Herzl

Richard L Crumley

A camming device for centering a meter or other instrument having a cylindrical body with respect to the upstream and downstream pipes of a flow line in which the meter is interposed. Each pipe is provided with an end flange having a circle of bolt holes, the pipe flanges being bridged by clamping bolts which pass through the holes to encage and compress the meter, the holes having clearances allowing limited bolt play. Rotatably mounted on the meter body is a camming device provided with a symmetrical array of camming edges that tangentially engage the bolts. When the device is turned on the meter body, it acts to force the bolts to their extreme hole positions, as a result of which the meter body is caused to assume a position concentric with the bolt circle that is centered with respect to the pipes.

Centering device for flowmeters interposed in flow line

A vortex-type flowmeter having a flow tube forming a conduit for the fluid to be metered and an obstacle assembly mounted therein capable of generating fluidic oscillations. These oscillations cause a deflectable section of the assembly which is cantilevered by a flexible beam from a fixed section mounted across the tube to vibrate at a corresponding frequency proportional to flow rate. These vibrations are mechanically transmitted to a coupling point outside the flow tube, whereby the flow rate may be read by means of an external force sensor engaging the coupling point. Vibration transmission is effected by a rod secured at one end to the deflectable section and passing through a bore in the flexible beam to join a probe which extends at right angles thereto. The probe is disposed within a bore in the fixed section and projects through an opening in the flow tube wall to terminate in the outside coupling point. The probe is held by a flexible diaphragm covering the flow tube opening and acting as a fulcrum, the outside portion of the probe being short in length relative to the inside portion, whereby the resultant lever affords mechanical advantage to amplify the force applied by the coupling point to the force sensor.

External-sensor vortex-type flowmeter

A flowmeter of the rotameter type wherein a thin-walled variable-area glass tube containing a float is encapsulated in a transparent plastic bar having upper and lower lateral bores therein. The bores communicate with the inlet and outlet ends of the tube and are adapted to receive retainer elements for attaching the bar to a meter frame and for coupling the flow passage to inlet and outlet pipe couplers.

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Willow Grove, PA, United States of America

Harold W Metzger