DIGITAL FLUID-PRESSURE COMPUTING DEVICES

Description

G06D covers computing or calculating devices that employ digital fluid-pressure systems, utilizing pneumatic or hydraulic signals to perform logical operations and arithmetic computations. These devices represent an alternative computing technology to purely electronic systems, operating through the controlled flow and pressure of fluids (air or liquid) to create binary logic states and perform calculations. Typical applications include pneumatic logic controllers, hydraulic computing circuits, and fluid-based automation systems developed before electronic computing became dominant. This subclass excludes purely mechanical computing devices (G06C) and electronic digital computers (G06F).