LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION Method General operations by centrifugal force, using centrifuges or free-vortex apparatus using magnetic or electrostatic effect Apparatus General operations by centrifugal force, using centrifuges or free-vortex apparatus , using magnetic or electrostatic effect SOLID/LIQUID OR SOLID/GAS SEPARATION Method General operations by centrifugal force using centrifuges or free-vortex apparatus using magnetic or electrostatic effect Apparatus General operations by centrifugal force using centrifuges or free-vortex apparatus , using magnetic or electrostatic effect SOLID/SOLID SEPARATION Method Dry methods material in bulk Individual sorting Screening, sifting, pneumatic sorting using pneumatic tables or jigs by magnetic or electrostatic effect by centrifugal force using centrifuges or free-vortex apparatus Wet methods General operations flotation, differential sedimentation screening Combinations Dry methods - wet methods Apparatus Dry methods material in bulk Individual sorting Screening, sifting, pneumatic sorting using pneumatic tables or jigs by magnetic or electrostatic effect by centrifugal force using centrifuges or free-vortex apparatus , Wet methods General operations flotation, differential sedimentation screening Combinations Dry methods - wet methods In this class, the following term is used with the meaning indicated: "vehicle" means all vehicles except those restricted to one of the following types of vehicles: rail vehicles, waterborne vessels, aircraft, space vehicles, hand carts, cycles, animal-drawn vehicles, and sledges, which are covered by the relevant subclasses of . Thus the term "vehicle" includes: vehicular characteristics which are common to more than one of the above-listed types; certain characteristics restricted to automobiles, road or cross-country trailers. The following exceptions to the above should be noted: subclass or embrace all vehicle wheels and tyres, except wheels for roller skates , wheels for model railway vehicles , and special adaptations of wheels or tyres for aircraft ; subclass embraces the connection of valves to inflatable elastic bodies in general, and in this respect it is not limited to vehicles; subclass embraces certain electric equipment of all electrically-propelled vehicles; subclass embraces certain power supply equipment for, but external to, any kind of electrically-propelled vehicle; subclass embraces safety belts or body harnesses used in all types of land vehicles; subclass relates to all kinds of vehicles, except the servicing of rail locomotives , ground equipment for aircraft , or cleaning apparatus peculiar to waterborne vessels , ; subclass includes brake control systems of general applicability, and in this respect it is not limited to vehicles. It also includes rail-vehicle power-brake systems and some other features of rail-vehicle brake systems. Attention is drawn to the Note following the title of class . WHEELS General structure , Characterised by the material Ornamental characteristics Particular structures: highly- resilient; multiple or multi-tyred; adhesion-increasing; rail-engaging ; ; ; Component parts spokes; rims ; , , hubs Other wheels AXLES; WHEEL-AXLE COMBINATIONS ; INCREASING WHEEL ADHESION, OTHERWISE THAN BY WHEEL STRUCTURE MOUNTING, HOLDING OR ASSEMBLING WHEELS , , CASTORS IN GENERAL In this subclass, the following term is used with the meaning indicated: "tyre" means a separate ground-engaging, continuous element outside the periphery of the wheel rim and includes the tyre casing, cover, or jacket and any insert, e.g. inner tube. In group , relating to connection of valves, the term "tyre" also includes inflatable elastic bodies other than tyres or inner tubes. Attention is drawn to the Note following the title of class . TYRES Characterised by material Characterised by transverse section General structure , , Parts; reinforcements; treads; walls; beads; other parts ; ; ; ; Particular devices , MOUNTING, INFLATION Inflating devices, pressure or temperature control , Apparatus or tools SUBJECT MATTER NOT PROVIDED FOR IN OTHER GROUPS OF THIS SUBCLASS Attention is drawn to the Note following the title of class . Attention is drawn to the Note following the title of class . RIGID SUSPENSION RESILIENT SUSPENSION General structures for single wheels; single sets of tandem wheels; pivoted suspension arms and accessories therefor ; ; for rigid axle or axle housing for two or more wheels Characterised by arrangement, location, or kind of: springs; vibration-dampers; or combined springs and dampers ; ; Characterised by adjustment SUSPENSIONS WITH MEANS FOR SENSING GROUND UNEVENNESS INTERCONNECTED SYSTEMS FOR RESILIENTLY-SUSPENDED WHEELS OTHER SUSPENSION ARRANGEMENTS Attention is drawn to the Note following the title of class . Windows, windscreens, non-fixed roofs, doors, or similar devices which are of general applicability, irrespective of whether described or claimed only for vehicles, are also classified in subclass . Attention is drawn to the Note following the title of class . In this subclass, the following terms or expressions are used with the meanings indicated: "auxiliary drives" means drives of auxiliary or external machines or devices from the propulsion unit, transmission, or other parts of the vehicle, and includes the control of such drives; "transmission" means all propulsion parts linking propulsion units, e.g. engines, to ultimate propulsive elements, e.g. wheels. Attention is drawn to the Note following the title of class . ARRANGEMENTS OF PROPULSION UNITS Electric; steam or gas; internal-combustion or jet-propulsion; plural diverse prime-movers ; ; ; Motor incorporated in, or adjacent to, traction wheel Other kinds Arrangements of control devices Safety devices ARRANGEMENT OF TRANSMISSIONS OR OF THEIR CONTROL DEVICES , ARRANGEMENT OF CHANGE-SPEED GEARING CONTROL DEVICES ARRANGEMENT IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST, OR FUEL SUPPLY, OF PROPULSION UNITS , , ARRANGEMENTS IN CONNECTION WITH POWER SUPPLY FROM FORCE OF NATURE AUXILIARY DRIVES KINDS OF CONTROL Fittings for automatically controlling vehicle speed INSTRUMENTATION, DASHBOARDS , This subclass covers, subject to the references following the title of the subclass: feeding of power to auxiliary circuits; current-collectors, arrangements thereof on rail or road vehicles or on vehicles in general; electrodynamic brake systems; electric propulsion of vehicles; control and regulation therefor. ELECTRIC PROPULSION With external or internal supply For monorail vehicles, suspension vehicles or rack railways; Magnetic suspension or levitation for vehicles Control CURRENT-COLLECTORS ELECTRIC SUPPLY TO AUXILIARY EQUIPMENT SAFETY ARRANGEMENTS ELECTRODYNAMIC BRAKING This subclass covers: overhead, overground, or underground power-supply lines; their crossings and points, erection and supervision; devices along rails and rail joints, for current-conduction and for insulation; safety devices along the route against earth currents and inductive interference with nearby communication lines. Attention is drawn to the Note following the title of class . Attention is drawn to the Note following the title of class . This subclass covers also arrangement or adaptation of lighting switches or signal-initiating means for vehicles. Attention is drawn to the Note following the title of class . LIGHTING Interior Other SIGNALLING Visual Acoustic Portable emergency devices Other , Attention is drawn to the Note following the title of class . VEHICLES OR VEHICLE PARTS OR ACCESSORIES NOT OTHERWISE PROVIDED FOR , ARRANGEMENTS Of optical viewing means Of steps or ladders ARRANGEMENTS OR ADAPTATIONS Of electric installations not otherwise provided for; of sanitation devices ; For advertising Of lubricating systems or devices ARRANGEMENTS OF FITTINGS FOR HOLDING OR CARRYING LUGGAGE OR OTHER ARTICLES PROTECTION OR SECURITY Arrangements concerning the vehicle or passengers; safety belts or body harnesses; anti- theft arrangements , ; ; BODY-FINISHING ELEMENTS OTHER VEHICLE FITTINGS Attention is drawn to the Note following the title of class . CLEANING , SERVICING, MAINTENANCE, REPAIR LIFTING OR MANOEUVRING Devices integral with, or separate from, vehicle , Vehicle modifications to receive separate devices In this subclass, the following expression is used with the meaning indicated: "brake control systems" includes brake control systems for vehicles or of general applicability. IMMOBILISATION Portable devices BRAKING Kind of braking and corresponding arrangements Vehicle modifications for cooling brakes Kinds of brake control initating means; varying braking force or its distribution according to road or load conditions ; continuous braking transmission of control between initiating means and brakes , Parts or accessories for fluid-pressure brake control: valve structure, disposition, and operation other parts or accessories In this subclass, the following expression is used with the meaning indicated: "air-cushion vehicles" includes all vehicles which are wholly or partly supported on land or water by air or other gaseous cushions. This subclass does not cover the control of a single sub-unit; such control is classified in the relevant place for the sub-unit, e.g. , . Where a single sub-unit is controlled by means of signals or commands from other sub-units, the control of this single sub-unit is classified in the relevant place for this sub-unit. For example, the control of variable-ratio gearing by means of signals from the engine or the accelerator is classified in the subclass for gearing, . Conjoint control of driveline units, e.g. engines, and variable-ratio gearing occurring only transiently during ratio shift and being also characterised by the control of the gearing is also classified in the subclass for gearing, . In groups , the first place priority rule is applied, i.e. at each hierarchical level, classification is made in the first appropriate place. When classifying in group , classification must also be made in groups in order to identify the purpose or use of the control. In this subclass, the following terms are used with the meanings indicated: "conjoint control" means that a programmed or condition-responsive automatic controller on board the vehicle, embodying control logic for vehicle sub-units of different type or different function, sends control signals to actuators of two or more vehicle sub-units, so that the sub-units act together to solve a particular problem or in response to a particular driving condition; "drive control system" means an electronic system in a road vehicle for automatically controlling the movement of that vehicle in order to take certain actions; "road vehicle" means a vehicle normally under the control of a human driver for transportation on roads, e.g. an automobile, truck or bus; "sub-unit" means one of the following vehicle systems: propulsion system, clutch system, change-speed gearing system, system for distributing drive torque between front and rear axles, axle differential system, brake system, steering system, suspension system, energy storage means, fuel cells or auxiliary equipment.