FLUID LOGIC ELEMENTS,

There are several fluid amplification techniques that can be used in logic systems. This discussion is concerned with fluid elements using the technique of attaching a stream to a wall. In designing logic systems from such elements, there are two methods of connecting the elements to accommodate the flow. These are sometimes called the closed system and the bleed system. In the closed system, the successive elements are made larger and larger to accommodate all the flow of the previous stages. This type of system is employed for multistage flow and pressure amplifiers. All the fluid supplied at the inputs is available at the output for efficient use of power. Because the size of each unit must be adjusted to that of the preceding one, such a design is not practical for the more complex logic systems. When the bleed method is adapted to logic systems, it is desirable from the standpoint of simplicity that the fluid elements have the following characteristics 1 same size, 2 same pressure source, and 3 equal pressure drop across nozzle i.e., equal flow. Extracted