<titlePart> <text>SECTION F <emdash/> MECHANICAL ENGINEERING</text> </titlePart> <titlePart> <text>LIGHTING</text> </titlePart> <titlePart> <text>HEATING</text> </titlePart> <titlePart> <text>WEAPONS</text> </titlePart> <titlePart> <text>BLASTING</text> </titlePart>

<titlePart> <text>SECTION F <emdash/> MECHANICAL ENGINEERING</text> </titlePart> <titlePart> <text>LIGHTING</text> </titlePart> <titlePart> <text>HEATING</text> </titlePart> <titlePart> <text>WEAPONS</text> </titlePart> <titlePart> <text>BLASTING</text> </titlePart> MACHINES positive displacement rotary or oscillating piston liquid and elastic fluid or elastic fluid liquid only reciprocating piston or other liquid and elastic fluid or elastic fluid liquid only non-positive displacement liquid and elastic fluid or elastic fluid liquid only ENGINES positive displacement rotary or oscillating piston liquid and elastic fluid or elastic fluid liquid only reciprocating piston or other liquid and elastic fluid or elastic fluid liquid only non-positive displacement liquid and elastic fluid or elastic fluid liquid only PUMPS positive displacement rotary or oscillating piston reciprocating piston or other non-positive displacement <titlePart> <text>ENGINEERING IN GENERAL</text> </titlePart> <titlePart> <text>FLUID-PRESSURE ACTUATORS</text> </titlePart> <titlePart> <text>HYDRAULICS OR PNEUMATICS IN GENERAL</text> </titlePart> <titlePart> <text>FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES</text> <entryReference>transducers <sref ref="F15B0005000000"/></entryReference> <entryReference>fluid dynamics in general <sref ref="F15D"/></entryReference> <entryReference>computers comprising fluid elements <sref ref="G06D"/>, <sref ref="G06G"/></entryReference> </titlePart> Attention is drawn to the Notes following the titles of class and subclass relating to "micro-structural devices" and "micro-structural systems". <titlePart> <text>Circuit elements having no moving parts</text> </titlePart> <titlePart> <text>Details</text> </titlePart> <titlePart> <text>Means for controlling fluid streams to fluid devices, e.g. by electric signals</text> </titlePart> <titlePart> <text>Constructional details</text> </titlePart> <titlePart> <text>Selection of specified materials</text> </titlePart> Group takes precedence over groups . <titlePart> <text>Boundary-layer devices, e.g. wall-attachment amplifiers</text> </titlePart> <titlePart> <text>for digital operation, e.g. to form a logical flip-flop, OR-gate, NOR-gate</text> </titlePart> <titlePart> <text>Multiple arrangements thereof for performing operations of the same kind, e.g. majority gates, identity gates</text> </titlePart> <titlePart> <text>Stream-interaction devices</text> </titlePart> <titlePart> <text>Momentum-exchange devices, e.g. operating by exchange between two orthogonal fluid jets</text> </titlePart> <titlePart> <text>Vortex devices, i.e. devices in which use is made of the pressure drop associated with vortex motion in a fluid</text> </titlePart> <titlePart> <text>Turbulence devices, i.e. devices in which a controlling stream will cause a laminar flow to become turbulent</text> </titlePart> <titlePart> <text>Direct-impact devices, i.e. devices in which two collinear opposing power streams are impacted</text> </titlePart> <titlePart> <text>Oscillators</text> </titlePart> <titlePart> <text>Circuit elements having moving parts</text> <entryReference>valves, construction of valves <sref ref="F16K"/></entryReference> </titlePart> Group takes precedence over groups . <titlePart> <text>using spool valves</text> </titlePart> <titlePart> <text>using diaphragms</text> <entryReference>connection of valves to inflatable elastic bodies <sref ref="B60C0029000000"/></entryReference> </titlePart> <titlePart> <text>using balls</text> </titlePart> <titlePart> <text>using reeds</text> </titlePart> <titlePart> <text>using nozzles or jet pipes</text> </titlePart> <titlePart> <text>the nozzle or jet pipe being movable</text> </titlePart> <titlePart> <text>the jet from the nozzle being intercepted by a flap</text> </titlePart> <titlePart> <text>Oscillators</text> </titlePart> <titlePart> <text>Circuit elements characterised by their special functions</text> </titlePart> <titlePart> <text>Manufacture of fluid-circuit elements</text> </titlePart> <titlePart> <text>Manufacture of assemblages of such elements</text> </titlePart> <titlePart> <text>Hybrid elements, i.e. circuit elements having features according to groups <sref ref="F15C0001000000"/> and <sref ref="F15C0003000000"/></text> </titlePart>