Browse Prior Art Database

Liquid Measurement Device

IP.com Disclosure Number: IPCOM000092570D
Original Publication Date: 1966-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Shaw, DG: AUTHOR

Abstract

Liquid to be measured is conducted by input tube 1 to reservoir 2. The latter is connected to output tube 6 by U-shaped flexible tube 3 made of a material such as rubber or TYGON* plastic. Rotatable arm 10 supports rollers 13 and 14 which are positioned so as to pinch off 3. Stepping motor 9 is connected to drive 10 in 180 degrees increments. Control 8 energizes 9 in response to an input from photoelectric liquid level detector 7 whenever the liquid in 2 rises above the level indicated by arrow 15. Each measured volume dispensed by the device is that volume of liquid contained in the length beta of tube 3 between points A and B. One measured volume is passed to output tube 6 each half revolution of *Trademark of U. S. Stoneware Company. 10.

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Liquid Measurement Device

Liquid to be measured is conducted by input tube 1 to reservoir 2. The latter is connected to output tube 6 by U-shaped flexible tube 3 made of a material such as rubber or TYGON* plastic. Rotatable arm 10 supports rollers 13 and 14 which are positioned so as to pinch off 3. Stepping motor 9 is connected to drive 10 in 180 degrees increments. Control 8 energizes 9 in response to an input from photoelectric liquid level detector 7 whenever the liquid in 2 rises above the level indicated by arrow 15. Each measured volume dispensed by the device is that volume of liquid contained in the length beta of tube 3 between points A and
B. One measured volume is passed to output tube 6 each half revolution of *Trademark of U. S. Stoneware Company. 10. Counter 16 registers the number of half revolutions of 10 and thus provides a readout of the amount of liquid passed.

To initially prime the device, an amount of water or other priming liquid in excess of two measured volumes is placed in 2. Detector 7 activates 8 so that 9 rotates 10, filling section beta with priming liquid. Setting 16 to zero then readies the device for operation and tube 1 is connected to the source of input liquid to be measured.

It is important that the volume contained between point A and detector 7 be at least equal to one measured volume, section beta. If this is not so, section beta can become partially filled with air, rendering the measurement invalid. Detector 11 and alar...