Browse Prior Art Database

Liquid Level Detector and Pump Control Circuit

IP.com Disclosure Number: IPCOM000092743D
Original Publication Date: 1967-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Moore, JA: AUTHOR [+2]

Abstract

Liquid which is to be measured for volume is channeled into buffer reservoir 1. When the liquid level rises above A, float 9 interrupts the beam passing from light source 8 to photodetector 11 and thus causes the output from 11 to drop. This sets latch 5, activating relay 7 and turning stepping motor 2 on. The latter operates in 180 degrees clockwise increments to drive metering pump 10. This lowers the liquid level in 1. Each time-2 completes a stepping increment, magnetic emitter disk 3 closes reed switch 4 so that a signal is transmitted to an external volume metering counter and to And 6. When 10 lowers the level of liquid below A, 9 drops below the light beam and the output from 11 returns positive. This causes 6 to reset 5, stopping motor 2.

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Liquid Level Detector and Pump Control Circuit

Liquid which is to be measured for volume is channeled into buffer reservoir
1. When the liquid level rises above A, float 9 interrupts the beam passing from light source 8 to photodetector 11 and thus causes the output from 11 to drop. This sets latch 5, activating relay 7 and turning stepping motor 2 on. The latter operates in 180 degrees clockwise increments to drive metering pump 10. This lowers the liquid level in 1. Each time-2 completes a stepping increment, magnetic emitter disk 3 closes reed switch 4 so that a signal is transmitted to an external volume metering counter and to And 6. When 10 lowers the level of liquid below A, 9 drops below the light beam and the output from 11 returns positive. This causes 6 to reset 5, stopping motor 2.

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