|  | 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, or sonic 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 |
( transferred to Fulltext... Hierarchy... Expanded...G01P 1/07, Fulltext... Hierarchy... Expanded...G01P 1/12 )

|  | G01P 1/07 |
· | Indicating devices, e.g. for remote indication (indicating measured values in general Fulltext... Hierarchy... Expanded...G01D; indicating working conditions of vehicles Fulltext... Hierarchy... Expanded...G07C 5/00) [3]

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

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

|  | G01P 1/11 |
· · · · | by the detection of the position of the indicator needle [3]

|  | G01P 1/12 |
· | Recording devices (recording measured values in general Fulltext... Hierarchy... Expanded...G01D; registering working conditions of vehicles Fulltext... Hierarchy... Expanded...G07C 5/00) [3]

|  | G01P 1/14 |
· · | for permanent recording [3]

|  | G01P 1/16 |
· · | for erasable recording, e.g. magnetic recording [3]

|  | 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 3/481 |
· · · · | of pulse signals [3]

|  | G01P 3/482 |
· · · · · | delivered by nuclear radiation detectors [3]

|  | G01P 3/483 |
· · · · · | delivered by variable capacitance detectors [3]

|  | G01P 3/484 |
· · · · · | delivered by contact-making switches [3]

|  | G01P 3/486 |
· · · · · | delivered by photo-electric detectors [3]

|  | G01P 3/487 |
· · · · · | delivered by rotating magnets [3]

|  | G01P 3/488 |
· · · · · | delivered by variable reluctance detectors [3]

|  | G01P 3/489 |
· · · · · | Digital circuits therefor [3]

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

|  | G01P 3/495 |
· · · · | where the indicating means responds to forces produced by the eddy currents and the generating magnetic field [3]

|  | 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 17/00)

|  | G01P 3/70 - G01P 3/78 |
( covered by Fulltext... Hierarchy... Expanded...G01P 3/00 )

|  | 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 5/01 |
· | by using swirlflowmeter [3]

|  | 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 5/07 |
· · · | with electrical coupling to the indicating device [3]

|  | 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

|  | G01P 5/165 |
· · · | Arrangements or constructions of Pitot tubes [3]

|  | G01P 5/17 |
· · · | Coupling arrangements to the indicating device [3]

|  | G01P 5/175 |
· · · · | with the determination of Mach number (analogue computers therefor Fulltext... Hierarchy... Expanded...G06G 7/57) [3]

|  | 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 13/04 |
· · | Indicating positive or negative direction of a linear movement or clockwise or anti-clockwise direction of a rotational movement [3]

|  | 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 15/03 |
· · | by using non-electrical means [3]

|  | 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 15/09 |
· · · | by piezo-electric pick-up [3]

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

|  | G01P 15/11 |
· · · | by inductive pick-up [3]

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

|  | G01P 15/125 |
· · · | by capacitive pick-up [3]

|  | G01P 15/13 |
· · · | by measuring the force required to restore a proofmass subjected to inertial forces to a null position [3]

|  | G01P 15/135 |
· · · | by making use of contacts which are actuated by a movable inertial mass [3]

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

|  | G01P 15/16 |
· | by evaluating the time-derivative of a measured speed signal [3]

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

|  | G01P 21/02 |
· | of speedometers