IPC 7 English version G01M !A-G01M 19/02

Testing static or dynamic balance of machines or structures (balancing rotary bowls of centrifuges B04B 9/14; apparatus characterised by the means for holding wheels or parts thereof B60B 30/00; determining stability factors of ships B63B; stabilising of aircraft B64C 17/00; control systems for balancing automatically in operation G05; balancing rotors of dynamo-electric machines H02K 15/16)

Details of balancing machines or devices

Adaptation of bearing support assemblies for receiving the body to be tested

Adaptation of drive assemblies for receiving the body to be tested

Instruments for indicating directly the magnitude and phase of the unbalance (measuring electrical variables in general G01R)

Determining the moment of inertia

Static balancing; Determining position of centre of gravity (by determining unbalance G01M 1/14)

Determining unbalance (G01M 1/30, G01M 1/38 take precedence)

by oscillating or rotating the body to be tested

and running the body down from a speed greater than normal

and applying external forces compensating forces due to unbalance

and converting vibrations due to unbalance into electric variables (measuring vibrations in general G01H; microphones or like acoustic electromechanical transducers H04R)

Performing balancing on elastic shafts, e.g. for crankshafts

with special adaptations for marking, e.g. by drilling

with special adaptations for determining unbalance of the body in situ, e.g. of vehicle wheels

Compensating unbalance (G01M 1/38 takes precedence; counterweights F16F 15/28)

by adding material to the body to be tested, e.g. by correcting-weights (correcting-weights per se F16F 15/32)

by removing material from the body to be tested, e.g. from the tread of tyres

by adjusting position of masses built-in the body to be tested

Combined machines or devices for both determining and correcting unbalance

Investigating fluid tightness of structures (investigating permeability of porous material, investigating the presence of flaws in general G01N)

by using fluid or vacuum

by detecting the presence of fluid at the leakage point

by observing bubbles in a liquid pool

for pipes, cables, or tubes; for pipe joints or seals; for valves

for containers, e.g. radiators

by observing elastic covers or coatings, e.g. soapy water

for pipes, cables, or tubes; for pipe joints or seals; for valves

using electric detection means (G01M 3/06, G01M 3/12, G01M 3/20, G01M 3/24, G01M 3/26 take precedence)

for pipes, cables, or tubes; for pipe joints or seals; for valves

using special tracer materials, e.g. dye, fluorescent material, radioactive material

for pipes, cables, or tubes; for pipe joints or seals; for valves

using infrasonic, sonic, or ultrasonic vibrations

by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors [2]

for pipes, cables, or tubes; for pipe joints or seals; for valves [2]

using progressive displacement of one fluid by another [2]

for containers, e.g. radiators [2]

by testing the possibility of maintaining the vacuum in containers, e.g. in can-testing machines [2]

by detecting change in dimensions of the structure being tested

by using light (G01M 3/02 takes precedence)

by using electric means, e.g. by observing electric discharges

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

Vibration-testing of structures; Shock-testing of structures (G01M 9/00 takes precedence)

Vibration-testing [5]

Monodirectional test stands [5]

Multidirectional test stands [5]

Shock-testing [5]

Aerodynamic testing; Arrangements in or on wind tunnels (building aspects section E; investigating properties of materials in general G01N)

Wind tunnels [5]

Details [5]

Measuring arrangements specially adapted for aerodynamic testing [5]

Aerodynamic models [5]

10/

Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels (building aspects section E; investigating properties of materials in general G01N)

11/

Testing of optical apparatus; Testing structures by optical methods not otherwise provided for

11/

Testing of optical properties

11/

Optical benches

11/

Testing of alignment of vehicle head-light devices

11/

Testing of mechanical properties

13/

Testing of machine parts (investigating the cutting power of tools G01N, e.g. G01N 3/58)

13/

Testing of gearing or of transmission mechanisms (measuring efficiency G01L)

13/

Testing of bearings

15/

Testing of engines (testing fuel-injection apparatus F02M 65/00; testing of internal-combustion engine ignition, e.g. timing, F02P 17/00; detecting or indicating knocks in internal-combustion engines G01L 23/22) [4]

17/

Testing of vehicles (G01M 15/00 takes precedence; testing fluid tightness G01M 3/00; testing elastic properties of bodies or chassis, e.g. torsion-testing, G01M 5/00; testing alignment of vehicle head-lighting devices G01M 11/06)

17/

007

of wheeled or endless-tracked vehicles (G01M 17/08 takes precedence) [6]

17/

013

of wheels [6]

17/

of tyres [6]

17/

of endless-tracks [6]

17/

of suspension or of damping [6]

17/

of steering behaviour; of rolling behaviour (measuring steering angles G01B; measuring steering forces G01L) [6]

17/

of railway vehicles [6]

17/

of suspensions, axles or wheels [6]

19/

Testing of structures or of apparatus, not provided for in the preceding groups

19/

Testing of sparking plugs (testing characteristics of the spark in internal-combustion engine ignition F02P 17/12; testing electric properties G01R 31/00)