Browse Prior Art Database

Vacuum Pressure Flow Detector with Multiple Sense Levels

IP.com Disclosure Number: IPCOM000084184D
Original Publication Date: 1975-Oct-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Beistle, RG: AUTHOR

Abstract

The device as depicted schematically is a flowmeter which gives incremental indication of linear flow. Flowmeter 10 comprises housing 1 with stepped design cavity 12. Opaque sphere 2 is loosely confined within stepped cavity 12. Travel limit shoulder 3 controls the height to which sphere 2 can rise within cavity 12. A plurality of light-emitting sources 4 are positioned along the longitudinal axis of flowmeter 10. A corresponding plurality of light-sensitive detectors 5 are positioned on opposite sides of flowmeter 10.

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Vacuum Pressure Flow Detector with Multiple Sense Levels

The device as depicted schematically is a flowmeter which gives incremental indication of linear flow. Flowmeter 10 comprises housing 1 with stepped design cavity 12. Opaque sphere 2 is loosely confined within stepped cavity 12. Travel limit shoulder 3 controls the height to which sphere 2 can rise within cavity 12. A plurality of light-emitting sources 4 are positioned along the longitudinal axis of flowmeter 10. A corresponding plurality of light-sensitive detectors 5 are positioned on opposite sides of flowmeter 10.

In operation, if vacuum, pressure or diffcrential pressure is applied in such a way as to cause flow in the direction shown by arrow 14, and the flow is increased from a no-flow condition gradually to an amount adequate to cause the sphere to be lifted in cavity 12, sphere 2 will rise to position #1, where it will remain until the pressure is again changed. At this point light from light source 4 to light detector 5 at position #1, will be blocked, thus signaling a low-flow (pressure/ vacuum) condition.

If the flow is then increased, a new value of flow will be found which will cause sphere 2 to be lifted to position #2. At this time the position #2 detector will signal an intermediate or normal flow (pressure/vacuum). Likewise if the flow is again increased, a third flow value will be found whereby sphere 2 will be lifted to position #3, causing the detector at position #3 to signal a high-f...