|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G12 |
INSTRUMENT DETAILS

|  | G12B |
DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR

|  | G12B |
Note(s) This sub-class includes only details which are not restricted to measuring instruments or to any other apparatus covered by a single class. Details which are covered by any other sub-class in Section A, F, G, or H are classified in the relevant sub-class. In particular, details which are restricted to measuring instruments are covered by the relevant sub-class of class Fulltext... Hierarchy... Expanded...G01, e.g. Fulltext... Hierarchy... Expanded...G01D. Constructional details restricted to electric apparatus, e.g. casings, screenings, are covered by sub-class Fulltext... Hierarchy... Expanded...H05K or the relevant sub-class in Section H. Attention is drawn to the notes on page 7 of this Section, in particular to the definition of "measuring" in Note (2).

|  | G12B 1/00 |
Sensitive elements capable of producing movement or displacement for purposes not limited to measurement; Associated transmission mechanisms therefor

|  | G12B 1/02 |
· | Compound strips or plates, e.g. bimetallic

|  | G12B 1/04 |
· | Hollow bodies having parts which are deformable or displaceable under pressure, e.g. Bourdon tube, bellows (bellows in general Fulltext... Hierarchy... Expanded...F16J 3/00)

|  | G12B 3/00 |
Details of movements not otherwise provided for (damping of shock or vibrations in general Fulltext... Hierarchy... Expanded...F16F; avoiding out-of-balance forces Fulltext... Hierarchy... Expanded...F16F 15/00; testing balance Fulltext... Hierarchy... Expanded...G01M)

|  | G12B 3/02 |
· | Caging of movements, i.e. locking of movements when not in use

|  | G12B 3/04 |
· | Suspensions (bearings Fulltext... Hierarchy... Expanded...F16C)

|  | G12B 3/06 |
· | Reducing effects of friction, e.g. by vibration (by lubrication Fulltext... Hierarchy... Expanded...F16N)

|  | G12B 3/08 |
· | Damping of movements, e.g. to promote rapid non-oscillatory movement to a final reading

|  | G12B 3/10 |
· · | using eddy currents

|  | G12B 5/00 |
Adjusting position or attitude, e.g. level, of instruments or other apparatus, or of parts thereof (levels per se Fulltext... Hierarchy... Expanded...G01C 9/00); Compensating for the effects of tilting or acceleration, e.g. for optical apparatus

|  | G12B 7/00 |
Compensating for the effects of temperature (by cooling Fulltext... Hierarchy... Expanded...G12B 15/00)

|  | G12B 9/00 |
Housing or supporting of instruments or other apparatus

|  | G12B 9/02 |
· | Casings; Housings; Cabinets (sealing arrangements for transmission members Fulltext... Hierarchy... Expanded...F16J, particularly Fulltext... Hierarchy... Expanded...F16J 15/50)

|  | G12B 9/04 |
· · | Details, e.g. cover

|  | G12B 9/06 |
· · · | Metal casings

|  | G12B 9/08 |
· | Supports; Devices for carrying

|  | G12B 9/10 |
· · | Instrument boards; Panels; Desks; Racks; Frameworks

|  | G12B 11/00 |
Indicating elements; Illumination thereof

|  | G12B 11/02 |
· | Scales; Dials

|  | G12B 11/04 |
· | Pointers; Setting-mechanisms therefor

|  | G12B 13/00 |
Calibrating of instruments and apparatus (calibrating of measuring instruments Fulltext... Hierarchy... Expanded...G01)

|  | G12B 15/00 |
Cooling (by refrigeration, e.g. circulation of refrigerated fluid, Fulltext... Hierarchy... Expanded...F25D; heat-exchange or heat-transfer details of general application Fulltext... Hierarchy... Expanded...F28F)

|  | G12B 15/02 |
· | by closed-cycle fluid-circulating systems

|  | G12B 15/04 |
· | by currents of fluid, e.g. air, in open cycle

|  | G12B 15/06 |
· | by contact with heat-absorbing or radiating masses, e.g. heat-sink

|  | G12B 17/00 |
Screening (insulation or other protection of buildings Fulltext... Hierarchy... Expanded...E04B; emergency protection of apparatus in general Fulltext... Hierarchy... Expanded...F16P 7/00; in connection with acoustic waves Fulltext... Hierarchy... Expanded...G10K 11/00; in connection with nuclear radiation Fulltext... Hierarchy... Expanded...G21F)

|  | G12B 17/00 |
Note(s) This group covers (a) the protection of instruments or other apparatus from external radiation or other influences, (b) the prevention of the emission of undesirable radiation or other influences by instruments or other apparatus.

|  | G12B 17/02 |
· | from electric or magnetic fields, e.g. radio waves

|  | G12B 17/04 |
· | from visible, ultra-violet, or infra-red light (screening of lighting devices Fulltext... Hierarchy... Expanded...F21V; optical filters Fulltext... Hierarchy... Expanded...G02B 5/20)

|  | G12B 17/06 |
· | from heat (Fulltext... Hierarchy... Expanded...G12B 17/04 takes precedence; cooling Fulltext... Hierarchy... Expanded...G12B 15/00)

|  | G12B 17/08 |
· | from influences producing mechanical damage, e.g. caused by blast, by external object, by person (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...G12B 17/02-G12B 17/06 take precedence)