|  | G |
SECTION G — PHYSICS

INSTRUMENTS

|  | G01 |
MEASURING (counting Fulltext... Hierarchy... Expanded...G06M); TESTING

|  | G01M |
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

|  | G01M |
Note(s) Attention is drawn to the notes immediately following the class title (Fulltext... Hierarchy... Expanded...G01).

|  | G01M 1/00 |
Testing static or dynamic balance of machines or structures (balancing rotary bowls of centrifuges Fulltext... Hierarchy... Expanded...B04B 9/14; determining stability factors of ships Fulltext... Hierarchy... Expanded...B63B; stabilising of aircraft Fulltext... Hierarchy... Expanded...B64C 17/00; control systems for balancing automatically in operation Fulltext... Hierarchy... Expanded...G05; balancing rotors of dynamo-electric machines Fulltext... Hierarchy... Expanded...H02K 15/16)

|  | G01M 1/02 |
· | Details of balancing machines or devices

|  | G01M 1/04 |
· · | Adaptation of bearing support assemblies for receiving the body to be tested

|  | G01M 1/06 |
· · | Adaptation of drive assemblies for the body to be tested

|  | G01M 1/08 |
· · | Instruments for indicating directly the magnitude and phase of the unbalance (measuring electrical variables in general Fulltext... Hierarchy... Expanded...G01R)

|  | G01M 1/10 |
· | Determining the moment of inertia

|  | G01M 1/12 |
· | Static balancing; Determining position of centre of gravity (by determining unbalance Fulltext... Hierarchy... Expanded...G01M 1/14)

|  | G01M 1/14 |
· | Determining unbalance (Fulltext... Hierarchy... Expanded...G01M 1/30, Fulltext... Hierarchy... Expanded...G01M 1/38 take precedence)

|  | G01M 1/16 |
· · | by oscillating or rotating the body to be tested

|  | G01M 1/18 |
· · · | and running the body down from a speed greater than normal

|  | G01M 1/20 |
· · · | and applying external forces compensating forces due to unbalance

|  | G01M 1/22 |
· · · | and converting vibrations due to unbalance into electric variables (measuring vibrations in general Fulltext... Hierarchy... Expanded...G01H; transducers per se Fulltext... Hierarchy... Expanded...H04R)

|  | G01M 1/24 |
· · · | Performing balancing on elastic shafts, e.g. for crankshafts

|  | G01M 1/26 |
· · · | with special adaptations for marking, e.g. by drilling

|  | G01M 1/28 |
· · · | with special adaptations for determining unbalance of the body in situ, e.g. of vehicle wheels

|  | G01M 1/30 |
· | Compensating unbalance (Fulltext... Hierarchy... Expanded...G01M 1/38 takes precedence; counterweights Fulltext... Hierarchy... Expanded...F16F 15/28)

|  | G01M 1/32 |
· · | by adding material to the body to be tested, e.g. by correcting-weights (correcting-weights per se Fulltext... Hierarchy... Expanded...F16F 15/32)

|  | G01M 1/34 |
· · | by removing material from the body to be tested, e.g. from the tread of tyres

|  | G01M 1/36 |
· · | by adjusting position of masses built-in the body to be tested

|  | G01M 1/38 |
· | Combined machines or devices for both determining and correcting unbalance

|  | G01M 3/00 |
Investigating fluid-tightness of structures (investigating permeability of porous material, investigating the presence of flaws in general Fulltext... Hierarchy... Expanded...G01N)

|  | G01M 3/02 |
· | by using fluid or vacuum

|  | G01M 3/04 |
· · | by detecting the presence of fluid at the leakage point

|  | G01M 3/06 |
· · · | by observing bubbles in a liquid pool

|  | G01M 3/08 |
· · · · | for pipes, cables, or tubes; for pipe joints or seals; for valves

|  | G01M 3/10 |
· · · · | for containers, e.g. radiators

|  | G01M 3/12 |
· · · | by observing elastic covers or coatings, e.g. soapy water

|  | G01M 3/14 |
· · · · | for pipes, cables, or tubes; for pipe joints or seals; for valves

|  | G01M 3/16 |
· · · | using electric detection means (Fulltext... Hierarchy... Expanded...G01M 3/06, Fulltext... Hierarchy... Expanded...G01M 3/12, Fulltext... Hierarchy... Expanded...G01M 3/20, Fulltext... Hierarchy... Expanded...G01M 3/24, Fulltext... Hierarchy... Expanded...G01M 3/26 take precedence)

|  | G01M 3/18 |
· · · · | for pipes, cables, or tubes; for pipe joints or seals; for valves

|  | G01M 3/20 |
· · · | using special tracer materials, e.g. dye, fluorescent material, radioactive material

|  | G01M 3/22 |
· · · · | for pipes, cables, or tubes; for pipe joints or seals; for valves

|  | G01M 3/24 |
· · · | using infrasonic, sonic, or ultrasonic vibrations

|  | G01M 3/26 |
· · | by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors [2]

|  | G01M 3/28 |
· · · | for pipes, cables, or tubes; for pipe joints or seals; for valves [2]

|  | G01M 3/30 |
· · · · | using progressive displacement of one fluid by another [2]

|  | G01M 3/32 |
· · · | for containers, e.g. radiators [2]

|  | G01M 3/34 |
· · · · | by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines [2]

|  | G01M 3/36 |
· · | by detecting change in dimensions of the structure being tested

|  | G01M 3/38 |
· | by using light (Fulltext... Hierarchy... Expanded...G01M 3/02 takes precedence)

|  | G01M 3/40 |
· | by using electric means, e.g. by observing electric discharges

|  | G01M 5/00 |
Investigating the elasticity of structures, e.g. deflection of bridges, aircraft wings (Fulltext... Hierarchy... Expanded...G01M 9/00 takes precedence; strain gauges Fulltext... Hierarchy... Expanded...G01B)

|  | G01M 7/00 |
Vibration-testing of structures; Shock-testing of structures (Fulltext... Hierarchy... Expanded...G01M 9/00 takes precedence)

|  | G01M 9/00 |
Aerodynamic testing; Arrangements in or on wind tunnels (building aspects Section E; investigating properties of materials in general Fulltext... Hierarchy... Expanded...G01N)

|  | G01M 10/00 |
Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels (building aspects Section E; investigating properties of materials in general Fulltext... Hierarchy... Expanded...G01N)

|  | G01M 11/00 |
Testing of optical apparatus; Testing structures by optical methods not otherwise provided for

|  | G01M 11/02 |
· | Testing of optical properties

|  | G01M 11/04 |
· · | Optical benches

|  | G01M 11/06 |
· · | Testing of alignment of vehicle head-light devices

|  | G01M 11/08 |
· | Testing of mechanical properties

|  | G01M 13/00 |
Testing of machine parts (investigating the cutting power of tools Fulltext... Hierarchy... Expanded...G01N, e.g. Fulltext... Hierarchy... Expanded...G01N 3/58)

|  | G01M 13/02 |
· | Testing of gearing or of transmission mechanisms (measuring efficiency Fulltext... Hierarchy... Expanded...G01L)

|  | G01M 13/04 |
· | Testing of bearings

|  | G01M 15/00 |
Testing of engines (testing of internal-combustion engine ignition, e.g. timing, Fulltext... Hierarchy... Expanded...F02P 17/00)

|  | G01M 17/00 |
Testing of vehicles (Fulltext... Hierarchy... Expanded...G01M 15/00 takes precedence; testing tightness Fulltext... Hierarchy... Expanded...G01M 3/00; testing elastic properties of bodies or chassis, e.g. torsion-testing, Fulltext... Hierarchy... Expanded...G01M 5/00; testing alignment of vehicle head-lighting devices Fulltext... Hierarchy... Expanded...G01M 11/06; detecting or indicating knocks in internal-combustion engines Fulltext... Hierarchy... Expanded...G01L 23/22)

|  | G01M 17/02 |
· | Testing of tyre performance (tyre tread patterns Fulltext... Hierarchy... Expanded...B60C 11/00)

|  | G01M 17/04 |
· | Testing of suspension or of damping

|  | G01M 17/06 |
· | Testing of steering behaviour; Testing of rolling behaviour (measuring steering angles Fulltext... Hierarchy... Expanded...G01B; measuring steering forces Fulltext... Hierarchy... Expanded...G01L)

|  | G01M 19/00 |
Testing of structures or of apparatus, not provided for in the preceding groups

|  | G01M 19/02 |
· | Testing of sparking-plugs (testing electric properties Fulltext... Hierarchy... Expanded...G01R 31/00)