Browse Prior Art Database

Gravity Operated Flow Sensor

IP.com Disclosure Number: IPCOM000092185D
Original Publication Date: 1968-Oct-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Baker, VO: AUTHOR [+3]

Abstract

This gravity-operated flow determining device employs a liquid level sensor for signaling a protective device. The arrangement consists of tubular shroud 12 into which liquid level sensor 14 fits. Hole A faces upward at one end of shroud 12. Another hole B, smaller than hole A, is located in the other end of shroud 12 facing downward. The flow sensor is mounted so that the end of the tube containing hole B is lower than the end containing hole A.

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Gravity Operated Flow Sensor

This gravity-operated flow determining device employs a liquid level sensor for signaling a protective device. The arrangement consists of tubular shroud 12 into which liquid level sensor 14 fits. Hole A faces upward at one end of shroud
12. Another hole B, smaller than hole A, is located in the other end of shroud 12 facing downward. The flow sensor is mounted so that the end of the tube containing hole B is lower than the end containing hole A.

Shroud 12 is positioned within reservoir 18 so that the return flow to such the reservoir 18 splashes down over and into hole A. Since hole A is larger than hole B, tube 12 fills up with the liquid until it overflows from hole A. Therefore, as long as the flow is maintained, sensor 14 within shroud 12 remains immersed and is cooled. However, as soon as the normal flow is interrupted, the flow into hole A ceases. The liquid already in the tube drains out of hole B under the action of gravity. When sensor 14 is exposed, an electrical circuit is completed through the contacts 16 sounding an alarm or energizing a protective device.

The flow determining device does not introduce any pressure loss into the system. Also, the desired sensor time constant can be adjusted by varying the tilt angle Y, the diameter of hole B, the inner diameter of shroud 12, or the length such shroud.

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