ENGINE STARTER DRIVES AND CONTROLS THEREFOR; [ MECHANICAL, ELECTRICAL AND VACUUM (AND ANY COMBINATION OF THE THREE) CLUTCHES, AND TRANSMISSION CONTROL; CARBURETORS AND FUEL FEEDING AND/OR METERING APPARATUS FOR INTERNAL COMBUSTION ENGINES, JET ENGINES, TURBINE ENGINES AND OTHER PRIME MOVERS; HYDRAULIC APPARATUS COMPRISING ACTUATORS AND SERVOS FOR POSITIONING AIRCRAFT CONTROL SURFACE SUCH AS AN AILERON, RUDDER OR ELEVATOR; THRUST VECTOR CONTROLS FOR ROCKET ENGINES; BRAKE MECHANISM FOR USE ON MACHINERY SUCH AS MINING RIGS, WINCHES, DERRICKS, AND FACTORY MACHINES; ] POWER ACTUATORS FOR BRAKE MECHANISMS, INCLUDING VACUUM-HYDRAULIC POWER UNITS; AIR PRESSURE HYDRAULIC UNITS AND AIR PRESSURE DIFFERENTIAL POWER CYLINDERS; [ POWER STEERING SYSTEMS FOR FARM TRACTORS; ROTARY TABLES FOR HOLDING OR POSITIONING WORK PIECES; ] VACUUM AND AIR PRESSURE PUMPS; [ UNIVERSAL JOINTS, VACUUM AND VACUUM-ELECTRIC GEAR SHIFTING MECHANISM; HYDRAULIC POWER APPARATUS USED IN ELECTRONIC CONTROL UNITS FOR MACHINE TOOLS; NUMERICALLY CONTROLLED MACHINE TOOLS; HYDRAULIC APPARATUS COMPRISING ACTUATORS; FILTERS, VALVES AND PUMPS; FUEL PUMPS, HYDROSTATIC TRANSMISSIONS; GRINDING MACHINES; DEBURRING MACHINES; ABRASIVE HOBBING MACHINES; DRILLS, REAMERS, CUTTERS, TAPS, TOOL BITS, DIES AND TOOL HOLDERS; FLEXIBLE DRIVE SHAFTS, FLEXURAL PIVOTS, ROTARY POWER TRANSMISSIONS; FLAME ARRESTORS FOR CARBURETORS; LPG FUEL SYSTEMS FOR MOTOR VEHICLES; CRYOGENIC FLUID HANDLING UNITS FOR AUTOMATICALLY MAINTAINING LIQUID NITROGEN AT A REQUIRED LEVEL IN HIGH-VACUUM BAFFLES; RECIRCULATING BALL SCREW ASSEMBLIES; VACUUM PUMPS AND HIGH-VACUUM COMPONENTS COMPRISING VALVES, CHAMBERS, TRAPS, BAFFLES, DISTILLATION UNITS AND EVAPORATION UNITS

FLUIDIC DEVICES EMPLOYING FLUID SIGNALS FOR ESTABLISHING FLUID CONTROL OR OUTPUT SIGNALS