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WEAPON SIGHTS; AIMING (optical aspects thereof G02B)
Definition statement
This subclass covers:

Sighting devices.

Aiming and Laying means.

Elevating or traversing control systems for weapons.

Direction control systems for missiles or projectiles.

Relationship between large subject matter areas

F41G is a classification entry directed to applications.

Specificities relating to functions involved for achieving sighting and aiming are to be classified in the corresponding functional classification entries (e.g. G01 for measuring aspects, G02 for optical aspects, G05 for control and regulation aspects, G06 for computers aspects, G09 for simulation aspects).

Special rules of classification within this subclass

The classification is exclusively done on the basis of the CPC classes.

Specific details in given subgroups should be allocated as additional information.

Group F41G 1/387 is not in use. EC classification is to be given in group F41G 11/001: 'Means for mounting tubular or beam shaped sighting on firearms'. IPC F41G 1/387 must be allocated.

Though the title of subgroup F41G 3/00 refers to laying means, elevating or traversing control systems for weapons are classified in F41G 5/00.

Glossary of terms
In this subclass, the following terms (or expressions) are used with the meaning indicated:

Aiming

Bringing a weapon to a direction differing from the sighting direction by corrections in order that the projectile may hit the target

Sighting

Bringing into visual coincidence a direction defined by a so-called "sighting" device with the direction of a target

Laying

Setting a weapon in the correct position for hitting a target

Sighting devices (for indirect laying of fire F41G 3/16; bombsights F41G 3/24;{ structurally associated with laser telemeters F41G 3/065; mounting tubular or beam shaped aiming devices on firearms F41G 11/001})
Definition statement
This group covers:

Mechanical aspects of sighting devices, which are either fixedly or detachably mounted on weapons, i. e. iron sights, telescopic sights, periscopic sight as well as tube and bar sights. The group further includes means for protecting, adjusting and for testing of such mechanical sighting devices. This group further includes weapon mounted means for illuminating the sights or the the target.

References relevant to classification in this group
This group does not cover:

Means for mounting tubular or beam shaped sighting or aiming devices on firearms

Aiming means; Laying means

Structural association of sighting-devices with laser telemeters

Indirect laying of fire

Bombsights

Optical aspects of sighting devices

Shooting or aiming glasses

characterised by the visual combination effect of the respective geometrical forms of fore and rear sight (F41G 1/42 takes precedence)
References relevant to classification in this group
This subgroup does not cover:

Tube sights; Bar sights

Special rules of classification within this group

The present group is a combination of two distinct concepts, a document classified here should have parallel entries in F41G 1/02, F41G 1/06.

Foresights
Definition statement
This subgroup covers:

Sights mounted at the distal end of the weapon and having a small dimension parallel to the barrel axis.

adjustable
References relevant to classification in this group
This subgroup does not cover:

Tools for adjustment of sights

Rearsights
Definition statement
This subgroup covers:

Sights mounted at the proximal end of the weapon and having a small dimension parallel to the barrel axis.

with aperture; {tubular or of ring form; Peep sights(F41G 1/42 takes precedence)}
References relevant to classification in this group
This subgroup does not cover:

Tube sights; Bar sights

Adjusting mechanisms therefor; Mountings therefor
References relevant to classification in this group
This subgroup does not cover:

Tools for adjustment of sights

Reflecting-sights specially adapted for smallarms or ordnance (reflecting-sights in general G02B)
Definition statement
This subgroup covers:

Sights with light source projecting the image of an aiming point or a reticle into the eye of the shooter either via a half-mirror or direct.

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References relevant to classification in this group
This subgroup does not cover:

Illumination of the sights

Periscopic sights for smallarms

Informative references
Attention is drawn to the following places, which may be of interest for search:

Reflecting sights in general

Night sights, e.g. luminescent {(optical aspects of sighting devices G02B 23/00, G02B 27/00)}
Definition statement
This subgroup covers:

Also includes daylight sights with active illumination of target or sights.

References relevant to classification in this group
This subgroup does not cover:

Mounting of nightsights

Night vision devices

Informative references
Attention is drawn to the following places, which may be of interest for search:

Optical aspects of telescopes

Optical aspects of other sighting devices

{for illuminating the sights}
Definition statement
This subgroup covers:

Includes active illumination of the sights by a powered light source.

Includes passive illumination of the sights by gathering and guiding ambient light to the sights.

Includes fluorescent and chemoluminescent markers on iron sights.

References relevant to classification in this group
This subgroup does not cover:

Virtual image of a reticle or an aiming point projected in the eye of the shooter

for illuminating the target, {e.g. flash lights}
References relevant to classification in this group
This subgroup does not cover:

Laser pointers

Telescopic sights specially adapted for smallarms or ordnance (telescopic sights in general G02B); Supports or mountings therefor
Informative references
Attention is drawn to the following places, which may be of interest for search:

Optical elements, systems or apparatus

Optical aspects of telescopes

Mounting telescopic sights on smallarms
Special rules of classification within this group

This group is not in use.

EC classification is to be given in group F41G 11/001: 'Means for mounting tubular or beam shaped sighting on firearms'

IPC F41G 1/387 must be allocated.

Periscopic sights specially adapted for smallarms or ordnance (periscopic sights in general G02B); Supports or mountings therefor
Definition statement
This subgroup covers:

Includes sights enabling shooting around the corner.

References relevant to classification in this group
This subgroup does not cover:

Sighting devices adapted for indirect laying of fire using a TV-monitor

Informative references
Attention is drawn to the following places, which may be of interest for search:

Optical elements, systems or apparatus

Mounting periscopic sights on smallarms
Informative references
Attention is drawn to the following places, which may be of interest for search:

Mounting of tubular periscopic sights on smallarms

Tube sights; Bar sights ; {Combinations of tubular fore and rearsights}
Definition statement
This subgroup covers:

Tubular sights or cylindrical sights, the cross-section not being necessarily circular, functionning by the tunnel effect, void of any optical components.

References relevant to classification in this group
This subgroup does not cover:

Telescopic sights

{Bar sights}
Definition statement
This subgroup covers:

Open sights (as opposed to the tubular sights) with a substantial longitudinal dimension with respect to the barrel length. Either single sight so as to aim along its lenght or combination of fore and rear sight.

Special rules of classification within this group

If it is a combination of bar and tube sight, classify in F41G 1/42 and F41G 1/425.

Spirit-level adjusting means, e.g. for correcting tilt ; {Means for indicating or correcting tilt or cant}
Definition statement
This subgroup covers:

Means for indicating the spacial orientation of the firearm, the adjusting is done by the shooter himself.

for particular applications
Special rules of classification within this group

The present group is an application group, a document classified here should have parallel entries in F41G 1/01-F41G 1/425.

for bows
References relevant to classification in this group
This subgroup does not cover:

Accessories for bows (other than sights)

Telescope sights for bows

for lead-indicating or range-finding, e.g. for use with rifles or shotguns
References relevant to classification in this group
This subgroup does not cover:

Arrangements for maintaining the aiming of a weapon with respect to a moving target

Adaptations of rangefinders for combination with telescopes or binoculars

Devices for testing or checking; {Tools for adjustment of sights}
Definition statement
This subgroup covers:

Devices and tools to test the function of the sights and/or the parallelity of sight and barrel.

References relevant to classification in this group
This subgroup does not cover:

Arrangements for checking the straighness of gun barrels

Aiming means; Laying means (sighting-devices F41G 1/00; { mounting tubular or beam shaped aiming devices on firearms F41G 11/001;} determining direction, distance or velocity by use of radio or other waves G01S; computer G06; aerials H01Q)
Definition statement
This group covers:

Arrangements for the aiming of weapons.

Arrangements for teaching or practicing the aiming of weapons.

Arrangements for testing or checking weapon aiming means.

Relationship between large subject matter areas

Details relating to sensing elements determining distance, direction, attitude and velocity are classified in the relevant groups of G01S and G01C.

References relevant to classification in this group
This group does not cover:

Elevating or traversing control systems for guns

Informative references
Attention is drawn to the following places, which may be of interest for search:

Aircrafts of the remote controlled vehicle type, i.e. RPV

Means for inhibiting firing in a specified direction

Light- or radiation-emitting guns

Structural details of sighting devices

Sighting devices combined with light source for illuminating a target

Sighting devices for range-finding or lead indicating

Means for mounting tubular or beam shaped sighting or aiming devices on firearms

Elevating or traversing control systems for vehicle-borne weapons

Systems for guiding a craft to a correct firing position

Photo-electric hit-detector systems

Projectiles transmitting information to a remote location using optical or electronic means

Adaptation of rangefinders for combination with telescopes or binoculars

Projectile velocity measurements

LIDARS for meteorological use

Optical details of sighting devices

Simulators for teaching or training purposes, for military purposes and tactics

Special rules of classification within this group

This group contains aiming arrangements wherein an observing position is remotely situated from the firing position (e.g. targeting using a remote observation platform).

This group contains arrangements for aiming at multiple targets, or for firing at one or more targets with multiple projectiles fired from one or more firing positions. This includes in particular the coordination of multiple firing platforms, the resolution of the weapon/target assignation problem and the control of the spread of a shot

These groups contain aiming arrangements making use of range-finding sensors. In particular, these group contains the systems wherein the motion of a target and/or the ballistic trajectory of a projectile are compensated, in accordance with the distance to the target estimated using a range-finding arrangement.

Elevating or traversing control systems for guns ({means for inhibiting firing in a specified direction F41A 17/08}; gun mountings permitting traversing or elevating movement, e.g. gun carriages, F41A 27/00; computers G06)
Definition statement
This group covers:

Arrangements for setting a weapon in a predetermined firing position.

Arrangements for maintaining the aiming direction of a weapon with respect to a moving target.

Arrangements for maintaining the aiming direction of a weapon mounted on a mobile platform.

Arrangements for testing or checking elevating or traversing control systems for weapons

Though the title of the group refers to elevating or traversing control systems for guns, this group applies to elevating or traversing control systems for weapons in general (e.g. missile/rocket launchers).

Relationship between large subject matter areas

Specific details relating to sensing elements determining distance, direction and velocity are classified in the relevant groups of G01S.

References relevant to classification in this group
This group does not cover:

Gun mountings permitting traversing or elevating movement, e.g. gun carriages

Determining the aiming direction of a weapon

Details of sensors for the tracking of targets

Informative references
Attention is drawn to the following places, which may be of interest for search:

Means for inhibiting firing in a specified direction

Rocket or torpedo launchers

Aiming means for vehicle-borne armament, e.g. on aircraft

Systems for guiding a craft to a correct firing position

Direction control systems for self-propelled missiles (flight control B64C, G05D 1/00; { counter-measures against guided missiles F41H 11/02; spin-stabilised missiles F42B 10/26}; self-propelled or guided missiles having direction control systems only installed aboard F42B 15/01; rocket torpedoes F42B 17/00; marine torpedoes or sea-mines having self-propulsion means F42B 19/00; locating by use of radio or other waves G01S; computing aspects G06)
Definition statement
This group covers:

Arrangements for the determination of the relative position between a guided missile and a target.

Preparatory measures taken before the launching of the guided missiles.

Guided missiles training or simulation devices.

Devices or systems for testing or checking arrangements for the determination of the relative position between a self-propelled missile and a target.

Though the title of the group refers to self-propelled missiles, the group also relates to un-propelled guided projectiles such as guided artillery shells and glide-bombs.

Relationship between large subject matter areas

Specific details relating to sensing elements determining distance, direction and velocity are classified in the relevant groups of G01S.

References relevant to classification in this group
This group does not cover:

Flight control of aircrafts

Steering arrangements for missiles

The physical integration of arrangements for guidance or control in missiles

Proximity fuzes

The control of position or course of missiles

Informative references
Attention is drawn to the following places, which may be of interest for search:

Dropping, ejecting, releasing weapons in flight

Arrangements of military equipment, e.g. armaments, armament accessories, in aircraft

Rocket or torpedo launchers

Anti-guided missile defence installations or systems

Directed energy weapons, for blinding or dazzling, i.e. by overstimulating the enemy's sensor equipment

Spin stabilized missiles

Chaff dispensers

Testing of ammunition

Homing radars

Sonar systems specially adapted for specific applications

Lidar systems specially adapted for specific applications

Satellite radio beacon positioning systems receivers specially adapted for military applications

Optical direction finders

Anti-jamming means for radars

Means for jamming radar

Counter-measures or counter-counter-measures using electronic or electro-optical means

Special rules of classification within this group

This group contains guided missiles simulation devices, which can be used for training purposes or for the testing of launching platforms. Guided missile simulation devices, used for the testing of launching platforms should also be classified in the relevant subgoup of F41G 7/001.

This group relates to all procedures performed before the launching of the missile, such as for instance:

The pre-launch testing of a missile,

The in-flight verification of the proper firing condition of the missile,

The alignment or calibration of the missiles' sensors,

The acquisition of the target by the missile,

The transmission of data to the missile,

The weapon and target assignation in the case of multi-missile or multi-target systems.

This group relates to systems combining multiple different guidance systems (e.g. beam-riding and homing ; passive infrared homing and semi-active laser homing, etc.).

Systems combining multiple guidance systems should also be classified in the groups corresponding to the guidance systems considered individually.

Passive homing system (e.g. passive infrared homing sensors, passive radio homing sensors) do not, for the time being, have a dedicated group

and should be classified in the top group F41G 7/22 or in the sub-group F41G 7/2213 if applicable.

The group F41G 7/2206 relates to homing systems (i.e. wherein the target tracker and the guidance computers are situated in the missile ) establishing a communication link with a remotely situated system, for instance for:

the preliminary guidance in the case lock on after launch homing systems,

the remote designation of an aim point,

the remote processing of data picked up by the missile,

the transmission of assistance data.

Systems establishing a communication link with a remotely situated system, wherein the guidance computers or the target tracker are not situated in the missile, should be classified in the relevant subgroups of F41G 7/30.

Semi-active homing systems are systems wherein the reflection by a target of a signal transmitted by a remotely situated designator is tracked.

Beam-riding systems correspond to systems wherein a missile is guided in relation to a reference direction defined by a beam projected from a remotely situated system and received directly by the missile.

Systems making use of satellite navigation systems (e.g. GPS, GALILEO, GLONASS) do not, for the time being, have a dedicated group and should be classified in the top group F41G 7/34. Systems making use of a satellite navigation system receiver hybridized with an inertial measurement unit should be classified in the F41G 7/36 group.

Glossary of terms
In this group, the following terms (or expressions) are used with the meaning indicated:

Homing systems

Systems wherein the target tracker and the guidance computers are situated in the missile.

Command-link systems

System wherein the target tracker and/or the guidance computers are remotely situated from the missile (e.g. command to line-of-sight systems)

Beam-riding systems

Systems wherein a missile is guided in relation to reference direction defined by a beam projected from a remotely situated transmitter.

Synonyms and Keywords

In patent documents the following abbreviations are often used:

SAL

Semi-Active Laser : Systems wherein the reflection by a target of a laser signal transmitted by a remotely situated designator is tracked

PIR

Passive Infra-Red : Systems wherein the infrared signature of a target is tracked

DIRCM

Direct Infra-Red Counter Measure : Counter measure system wherein the infrared seeker of a missile is dazzled or disabled using an infrared radiation source

MWS

Missile Warning System

CLOS

Command to line of sight guidance systems

LOAL

Lock-on After Launch : Homing systems wherein the target is acquired and locked-on after the missile has been launched

LOBL

Lock-on Before Launch : Homing systems wherein the target is acquired and locked-on before the missile is launched

Systems for controlling missiles or projectiles, not provided for elsewhere
Definition statement
This group covers:

Arrangements for guiding a craft to a correct condition for firing or dropping a weapon.

Corresponding arrangements for training or teaching.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Safety arrangements for inhibiting firing in a specified direction, e.g. at a friendly person or at a protected area

Torpedo launching apparatus

Aiming arrangements for vehicle-borne armament, e.g. on aircraft

Bombsights

Elevating or traversing control systems for vehicle-borne weapons

Preparatory measures taken before the launching of the guided missiles

Acoustic homing guidance systems, e.g. for torpedoes

Details of sighting or aiming apparatus; Accessories {(Tools for adjustment of sights F41G 1/545)}
Definition statement
This group covers:

Details and accessories relevant to sighting apparatuses, not covered in F41G 1/00.

Special rules of classification within this group

Mounting for telescopic sights are classified in IPC-group F41G 1/387.

{Means for mounting tubular or beam shaped sighting or aiming devices on firearms}
Definition statement
This subgroup covers:

The devices being lamps, e.g. flashsights, telescopes or other tubular optical, optronic, electronic or electric devices mounted on smallarms.

Informative references
Attention is drawn to the following places, which may be of interest for search:

Miscellaneous attachments for smallarms; Accessories

Special rules of classification within this group

Documents need to be classified in IPC group F41G 1/387.

If the mounting means are also adapted for accessories other than sighting or aiming devices and is specifically for smallarms, consider classification in the generic accessories group F41C 27/00.

{Mountings with a dove tail element, e.g. "Picatinny rail systems"}
Definition statement
This subgroup covers:

Includes picatinny or weaver rails with integrated electric connections.

This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013