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# Multi Input Fluid Logical Element

IP.com Disclosure Number: IPCOM000095644D
Original Publication Date: 1964-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 28K

IBM

## Related People

Truslove, DJ: AUTHOR

## Abstract

The device is for hydraulically performing majority logic. A cavity divided into two interconnecting parts X and Y by a constriction or porous plug R, has pressure inlets A...F and an outlet 0. The inlets and outlet are connected to the cavity through porous plugs. A globule of mercury M is disposed in one of the parts X and Y. When the globule M is in cavity X, the output pressure is zero (logical 0). If the globule is in cavity Y, the output pressure is positive (logical 1).

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Multi Input Fluid Logical Element

The device is for hydraulically performing majority logic. A cavity divided into two interconnecting parts X and Y by a constriction or porous plug R, has pressure inlets A...F and an outlet 0. The inlets and outlet are connected to the cavity through porous plugs. A globule of mercury M is disposed in one of the parts X and Y. When the globule M is in cavity X, the output pressure is zero (logical 0). If the globule is in cavity Y, the output pressure is positive (logical 1).

Let available input pressures be P or 0. If pressure is applied to A alone, the pressure on the globule is P/3, to A and B it is 2P/3, and to A, B and C it is P. If the switching pressure is very much less than P/3, the logical function at the output depends upon the pressure in cavity Y. Thus, if pressure in Y is zero, switching is effected by pressure at A, B or C. If pressure in Y is.P/3, pressure at any two combinations of A, B and C causes switching. If pressure in Y is greater than 2P/3 and less than P, pressure at A, B and C causes switching.

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