Browse Prior Art Database

Fluid Operated Diaphragm Logic Devices

IP.com Disclosure Number: IPCOM000075087D
Original Publication Date: 1971-Jul-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Helsinski, EF: AUTHOR

Abstract

his fluid logic element has a flexible diaphragm dividing a compartment into a bias chamber on one side of the diaphragm and a plurality of smaller signal chambers on the opposite side. fluid pressure is continuously supplied to the bias chamber to bias the diaphragm to isolate the signal chambers from one another. The bias pressure is overcome by applying fluid pressure signals to the opposite side of the diaphragm. When the combined fluid pressure signal forces are greater than the bias pressure force, a fluid channel is opened between the input signal chambers and the output signal chamber.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 57% of the total text.

Page 1 of 2

Fluid Operated Diaphragm Logic Devices

his fluid logic element has a flexible diaphragm dividing a compartment into a bias chamber on one side of the diaphragm and a plurality of smaller signal chambers on the opposite side. fluid pressure is continuously supplied to the bias chamber to bias the diaphragm to isolate the signal chambers from one another. The bias pressure is overcome by applying fluid pressure signals to the opposite side of the diaphragm. When the combined fluid pressure signal forces are greater than the bias pressure force, a fluid channel is opened between the input signal chambers and the output signal chamber.

Drawing A shows the fluid logic element arranged to operate as an AND gate. Flexible, fluid impervious diaphragm 10 is sandwiched between elements 11 and 12 to form bias chamber 13 and signal chambers 14, 16 and 18. Chambers 14, 16 and 18 are separated by projections 15 and 17. Duct 19 is connected to a source of pressurized fluid to bias diaphragm 10 into sealing contact with projections 15 and 17. Pressurized fluid sources P1 and P2 are connected to chambers 14 and 16 through valves 20 and 22. P1 and P2 individually apply less bias force than the bias pressure, but when combined apply a greater force than the bias pressure. Chamber 18 is vented to the atmosphere through duct 24. Duct 25 provides output pressure signals to a sensing device (not shown) in response to changes in pressure in output Chamber 18. In operation, opening of ei...