B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
 B01 - 
B07
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION
Method
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/LIQUID OR SOLID/GAS SEPARATION
Method
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/SOLID SEPARATION
Method
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB07B
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
Apparatus
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB04B, B04C
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
  
SHAPING
 B23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR (punching, perforating, making articles by processing sheet metal, tubes, or profiles B21D; wire-working B21F; making pins, needles, or nails B21G; making chains B21L; grinding B24)
 B23

Note(s)

  1. This class covers:
    • operations not provided for in any other class;
    • combinations of operations covered by different subclasses of classes B21-B24, which combinations are covered by subclass B23P, with the exception of subsidiary operations performed in conjunction with main operations covered by a single subclass;
    • features, specific to machine tools, which relate to a requirement or problem of a nature which is not peculiar to a particular kind of machine tool, e.g. feeding work, which are covered by subclass B23Q, although the realisation of these features may differ according to the kind of machine tool concerned. The said subclass covers such features, in general, even if the feature or a specific function, in any particular case, is to some extent peculiar to, or is claimed only for, machine tools designed for one particular operation; only in exceptional cases are such features classified in the subclass for the machine tool concerned. Certain features of this general nature are, however, referred to subclasses relating to particular metal-working operations, especially B23B, in which case the subclasses in question are not restricted, in respect of those features, to the kind of machine tool with which they are primarily concerned.
  2. In this class, the following terms or expressions are used with the meanings indicated:
    • "metal-working" covers the working of other materials unless the context requires otherwise;
    • "kind of operations" and similar expressions relate to such metal-working operations as boring, drilling, milling and grinding;
    • "kind of machine" means a machine designed for a particular kind of metal-working operation (e.g. a lathe);
    • "form of machine" means a machine of a particular kind adapted or arranged for a particular way of working or for particular work, e.g. face-plate lathe, tailstock lathe, turret lathe;
    • "different machines" covers different forms of machines for performing the same type of metal-working operation, e.g. vertical and horizontal boring machines.
  3. If details, components, or accessories have no essential feature specific to machine tools, the more general class, e.g. F16, takes precedence.
 B23H
WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL (processes for the electrolytic or electrophoretic production of coatings, electroforming, or apparatus therefor C25D; processes for the electrolytic removal of material from objects C25F; manufacturing printed circuits using precipitation techniques to apply the conductive material to form the desired conductive pattern H05K 3/18)  [4]
 B23H

Note(s)

This subclass covers the working of metal described as "electroerosion".  [4]

 B23H
Subclass index
ELECTRICAL DISCHARGE MACHINING 1/00
ELECTROCHEMICAL MACHINING 3/00
COMBINED MACHINING 5/00
COMMON PROCESSES OR APPARATUS 7/00
MACHINING PARTICULAR OBJECTS OR OBTAINING SPECIAL EFFECTS OR RESULTS 9/00
AUXILIARY APPARATUS OR DETAILS 11/00
P:40 B23H 1/00
Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric  [4]
 B23H 1/02
·  Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges  [4]
P:30 B23H 3/00
Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte  [4]
P:10 B23H 5/00
Combined machining  [4]
P:20 B23H 7/00
Processes or apparatus applicable to both electrical discharge machining and electrochemical machining  [4]
 B23H 7/02
·  Wire-cutting  [4]
 B23H 7/04
·  ·  Apparatus for supplying current to working gap; Electric circuits specially adapted therefor  [4]
 B23H 7/06
·  ·  Control of the travel curve of the relative movement between electrode and workpiece  [4]
 B23H 7/08
·  ·  Wire electrodes  [4]
 B23H 7/26
·  Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode  [4]
P:0 B23H 9/00
Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects (heat treatment by cathodic discharge C21D 1/34)  [4]
P:50 B23H 11/00
Auxiliary apparatus or details, not otherwise provided for  [4]