|  | G |
SECTION G — PHYSICS

INSTRUMENTS

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

|  | G01P |
MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT (monitoring speed or deceleration of electrically-propelled vehicles Fulltext... Hierarchy... Expanded...B60L 3/00; vehicle lighting systems adapted to indicate speed Fulltext... Hierarchy... Expanded...B60Q 1/54; determining position or course in navigation, measuring ground distance in geodesy or surveying Fulltext... Hierarchy... Expanded...G01C; combined measuring devices for measuring two or more variables of movement Fulltext... Hierarchy... Expanded...G01C 23/00; measuring velocity of sound Fulltext... Hierarchy... Expanded...G01H; measuring velocity of light Fulltext... Hierarchy... Expanded...G01J 7/00; by reception or emission of radio waves, other electromagnetic waves, and based on propagation time Fulltext... Hierarchy... Expanded...G01S; measuring speed of nuclear radiation Fulltext... Hierarchy... Expanded...G01T; measuring acceleration of gravity Fulltext... Hierarchy... Expanded...G01V)

|  | G01P |
Note(s) Attention is drawn to the notes immediately following the class title (Fulltext... Hierarchy... Expanded...G01).

|  | G01P 1/00 |
Details of instruments

|  | G01P 1/02 |
· | Housings

|  | G01P 1/04 |
· | Special adaptations of driving means

|  | G01P 1/06 |
· | Indicating or recording devices, e.g. for remote indication (indicating or recording in general Fulltext... Hierarchy... Expanded...G01D; registering or indicating working conditions of vehicles Fulltext... Hierarchy... Expanded...G07C 5/00)

|  | G01P 1/08 |
· · | Arrangements of scales, pointers, lamps, or acoustic indicators, e.g. in automobile speedometers

|  | G01P 1/10 |
· · · | for indicating predetermined speeds

|  | G01P 3/00 |
Measuring linear and angular speed; Measuring differences of linear and angular speeds (Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...G01P 5/00-G01P 11/00 take precedence; counting mechanisms Fulltext... Hierarchy... Expanded...G06M)

|  | G01P 3/00 |
Note(s) The sub-groups of this group are distinguished by the method of measurement which is of major importance. Thus the mere application of other methods for giving a final indication does not affect the classification.

|  | G01P 3/02 |
· | Devices characterised by the use of mechanical means

|  | G01P 3/04 |
· · | by comparing two speeds

|  | G01P 3/06 |
· · · | using a friction gear

|  | G01P 3/08 |
· · · | using differential gearing

|  | G01P 3/10 |
· · | by actuating an indicating element, e.g. pointer, for a fixed time

|  | G01P 3/12 |
· · | by making use of a system excited by impact

|  | G01P 3/14 |
· · | by exciting one or more mechanical resonance systems

|  | G01P 3/16 |
· · | by using centrifugal forces of solid masses (governors Fulltext... Hierarchy... Expanded...G05D 13/00)

|  | G01P 3/18 |
· · · | transferred to the indicator by mechanical means

|  | G01P 3/20 |
· · · | transferred to the indicator by fluid means

|  | G01P 3/22 |
· · · | transferred to the indicator by electric or magnetic means

|  | G01P 3/24 |
· · | by using friction effects (Fulltext... Hierarchy... Expanded...G01P 3/06 takes precedence)

|  | G01P 3/26 |
· | Devices characterised by the use of fluids

|  | G01P 3/28 |
· · | by using pumps

|  | G01P 3/30 |
· · | by using centrifugal forces of fluids

|  | G01P 3/32 |
· · · | in a rotary container communicating with a fixed container

|  | G01P 3/34 |
· · | by using friction effects

|  | G01P 3/36 |
· | Devices characterised by the use of optical means, e.g. using infra-red, visible, or ultra-violet light (Fulltext... Hierarchy... Expanded...G01P 3/68 takes precedence)

|  | G01P 3/38 |
· · | using photographic means

|  | G01P 3/40 |
· · | using stroboscopic means

|  | G01P 3/42 |
· | Devices characterised by the use of electric or magnetic means (Fulltext... Hierarchy... Expanded...G01P 3/66 takes precedence; measuring electric or magnetic values in general Fulltext... Hierarchy... Expanded...G01R)

|  | G01P 3/44 |
· · | for measuring angular speed (Fulltext... Hierarchy... Expanded...G01P 3/56 takes precedence)

|  | G01P 3/46 |
· · · | by measuring amplitude of generated current or voltage

|  | G01P 3/48 |
· · · | by measuring frequency of generated current or voltage

|  | G01P 3/49 |
· · · | using eddy currents

|  | G01P 3/50 |
· · | for measuring linear speed (Fulltext... Hierarchy... Expanded...G01P 3/56 takes precedence)

|  | G01P 3/52 |
· · · | by measuring amplitude of generated current or voltage

|  | G01P 3/54 |
· · · | by measuring frequency of generated current or voltage

|  | G01P 3/56 |
· · | for comparing two speeds

|  | G01P 3/58 |
· · · | by measuring or comparing amplitudes of generated currents or voltages

|  | G01P 3/60 |
· · · | by measuring or comparing frequency of generated currents or voltages

|  | G01P 3/62 |
· | Devices characterised by the determination of the variation of atmospheric pressure with height to measure the vertical components of speed (measuring pressure in general Fulltext... Hierarchy... Expanded...G01L)

|  | G01P 3/64 |
· | Devices characterised by the determination of the time taken to traverse a fixed distance

|  | G01P 3/66 |
· · | using electric or magnetic means (measuring short time intervals Fulltext... Hierarchy... Expanded...G04F)

|  | G01P 3/68 |
· · | using optical means, i.e. using infra-red, visible, or ultra-violet light (by reflection of waves Fulltext... Hierarchy... Expanded...G01S 9/62)

|  | G01P 3/70 |
· | Devices characterised by the combination of measuring means specified in two or more of sub-groups Fulltext... Hierarchy... Expanded...G01P 3/02, Fulltext... Hierarchy... Expanded...G01P 3/26, Fulltext... Hierarchy... Expanded...G01P 3/36, Fulltext... Hierarchy... Expanded...G01P 3/42 and Fulltext... Hierarchy... Expanded...G01P 3/62

|  | G01P 3/70 |
Note(s) Inventions are only to be classified in this group if no other single group can be selected as being predominantly applicable. In classifying a combination of two or more of the techniques specified, the first applicable one of the sub-groups below takes precedence over any others of these sub-groups.

|  | G01P 3/72 |
· · | using fluid means

|  | G01P 3/74 |
· · | using optical means, i.e. using infra-red, visible, or ultra-violet light

|  | G01P 3/76 |
· · | using electric or magnetic means

|  | G01P 3/78 |
· · | using the variation of atmospheric pressure with height to measure the vertical component of speed

|  | G01P 5/00 |
Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft (application of speed-measuring devices for measuring volume of fluids Fulltext... Hierarchy... Expanded...G01F)

|  | G01P 5/02 |
· | by measuring forces exerted by the fluid on solid bodies, e.g. anemometer

|  | G01P 5/04 |
· · | using deflection of baffle-plates

|  | G01P 5/06 |
· · | using rotation of vanes (measuring speed of rotating shafts Fulltext... Hierarchy... Expanded...G01P 3/00)

|  | G01P 5/08 |
· | by measuring variation of an electric variable directly affected by the flow, e.g. by using dynamo-electric effect

|  | G01P 5/10 |
· | by measuring thermal variables

|  | G01P 5/12 |
· · | using variation of resistance of a heated conductor

|  | G01P 5/14 |
· | by measuring differences of pressure in the fluid

|  | G01P 5/16 |
· · | using Pitot tubes, e.g. Machmeter

|  | G01P 5/18 |
· | by measuring the time taken to traverse a fixed distance

|  | G01P 5/20 |
· · | using particles entrained by a fluid stream

|  | G01P 7/00 |
Measuring speed by integrating acceleration (measuring travelled distance by double integration of acceleration Fulltext... Hierarchy... Expanded...G01C 21/16)

|  | G01P 9/00 |
Measuring speed by using gyroscopic effect, e.g. using gas, using electron beam (gyroscopes or turn-sensitive devices per se Fulltext... Hierarchy... Expanded...G01C 19/00)

|  | G01P 9/02 |
· | using rotary gyroscopes

|  | G01P 9/04 |
· | using turn-sensitive devices with vibrating masses, e.g. tuning-fork

|  | G01P 11/00 |
Measuring average value of speed (by determining time taken to traverse a fixed distance Fulltext... Hierarchy... Expanded...G01P 3/64, Fulltext... Hierarchy... Expanded...G01P 5/18)

|  | G01P 11/02 |
· | Measuring average speed of a number of bodies, e.g. of vehicles for traffic control

|  | G01P 13/00 |
Indicating or recording presence, absence, or direction, of movement (counting moving objects Fulltext... Hierarchy... Expanded...G06M 7/00; electric switches Fulltext... Hierarchy... Expanded...H01H)

|  | G01P 13/02 |
· | Indicating direction only, e.g. by weather vane

|  | G01P 15/00 |
Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration

|  | G01P 15/02 |
· | by making use of inertia forces (Fulltext... Hierarchy... Expanded...G01P 15/14 takes precedence)

|  | G01P 15/04 |
· · | for indicating maximum value

|  | G01P 15/06 |
· · · | using members subjected to a permanent deformation

|  | G01P 15/08 |
· · | with conversion into electric or magnetic values

|  | G01P 15/10 |
· · · | by vibratory strings

|  | G01P 15/12 |
· · · | by alteration of electrical resistance

|  | G01P 15/14 |
· | by making use of gyroscopes (gyroscopes per se Fulltext... Hierarchy... Expanded...G01C 19/00)

|  | G01P 21/00 |
Testing or calibrating of apparatus or devices covered by the preceding groups

|  | G01P 21/02 |
· | of speedometers