WO2008093135A1 - Lunette de visee pour la peche - Google Patents

Lunette de visee pour la peche Download PDF

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Publication number
WO2008093135A1
WO2008093135A1 PCT/GB2008/050047 GB2008050047W WO2008093135A1 WO 2008093135 A1 WO2008093135 A1 WO 2008093135A1 GB 2008050047 W GB2008050047 W GB 2008050047W WO 2008093135 A1 WO2008093135 A1 WO 2008093135A1
Authority
WO
WIPO (PCT)
Prior art keywords
gun
viewer
target
sight
water surface
Prior art date
Application number
PCT/GB2008/050047
Other languages
English (en)
Inventor
Trevor Graham Maddison
Original Assignee
Revcad Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Revcad Ltd filed Critical Revcad Ltd
Publication of WO2008093135A1 publication Critical patent/WO2008093135A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/38—Telescopic sights specially adapted for smallarms or ordnance; Supports or mountings therefor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K81/00—Fishing with projectiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B11/00—Compressed-gas guns, e.g. air guns; Steam guns
    • F41B11/80—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes
    • F41B11/83—Compressed-gas guns, e.g. air guns; Steam guns specially adapted for particular purposes for launching harpoons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B7/00—Spring guns
    • F41B7/04—Spring guns adapted to discharge harpoons
    • F41B7/043—Accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • F41G3/08—Aiming or laying means with means for compensating for speed, direction, temperature, pressure, or humidity of the atmosphere
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
    • G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight

Definitions

  • the 'Fishing Scope' (hereafter also referred to as the 'scope') is a design invention for the outdoor pursuits and survival, or hunting and fishing application.
  • the design is a special telescopic gun-sight designed to be fitted to a gun for surface to underwater target shooting (or fishing) using a gun, or some other means of firing a projectile (hereafter referred to as the 'gun').
  • the 'Fishing Scope' is a type of gun-sight with special modifications to overcome the problem of water surface-to-air light refraction when shooting underwater targets.
  • the design implements an automatic relative angular alignment adjustment between the scope viewer and the gun in response to its integrated instrumentation such that the scope viewer can be pointed directly at the refracted image of the underwater target whilst the gun is pointed directly at the physical underwater target.
  • Gun, Bow & Crossbow The proposed design is an accessory to gun, bow, crossbow and other missile projection technology. As an accessory to these devices it does not include any of the technology or prior art of hunting and shooting devices.
  • Telescopic Viewer or Gun-Sight
  • Telescopes or telescopic viewers use lens technology and have been used in various application for many years, dating back as far a Galileo and before. In more modern times they have been widely used in hunting and military applications.
  • the focal lengths of the viewers are relatively short and in this respect are more akin to technology used in cameras than in hunting applications.
  • the viewer is a constitutional part of the proposed design. It is also possible to implement the proposed design using electronic viewer alternatives as are commonly used on modern digital cameras.
  • Distance Measurement - Telescopic sights have also been used in surveyors instruments and other devices for measuring a distance to a target. This forms part of the prior art of the design. More modern alternatives for measuring distance are also available. This includes the laser technology for distance measurement, now used in many applications (e.g. industrial reverse engineering, robotics, golf distance reading).
  • the proposed design is not specifically applied to any one distance measuring instrument, but is more general in that it simply covers the use of a distance-to-target measuring instrument.
  • the best mode of invention describes the use of focal distance as the means of measurement but other methods can be equivalently applied to the design. In the case of focal distance measurement - technology exists to implement automatic focus adjustment - as used in modern cameras. Auto-focus would constitute an enhancement of the proposed design and could therefore form part of the prior art.
  • the proposed design includes a device to measure the distance to the water surface.
  • the best mode of invention proposes the use of a height differential gauge. This may consist of a tube rilled with fluid and a pressure gauge fitted in the lower end. The height between the two ends of the tube is then determined from the fluid pressure.
  • the proposed design is not restricted to this type of device for height measurement.
  • the distance to the water surface can alternatively be measured using a laser measurement technology or some other instrument (note: either the vertical or slant distance to the water surface are acceptable readings for the device to work).
  • the fishing scope design addresses an ancient problem of shooting and hitting an underwater target (e.g. fishing) using a harpoon, gun or spear gun to spear a fish (or target) by shooting a projectile from above the water surface.
  • the difficulty in the practice arises from the effects of water surface-to-air light refraction which bends the light as it passes through the water surface, thus displacing the visual image of a target from its true position.
  • Hunters have attempted to overcome the problem by simply estimating the refraction, or in the case of spear fishermen by the method of dipping the spear to allow them to see the angle of refraction and use it to help them determine the required projectile direction of the spear to hit the target.
  • the target When the target is viewed at an angle to the water surface (other than the perpendicular) light refraction occurs as the image of the target passes through the water surface and this makes the target appear to be in a different location to its actual location from the point of view of an observer stationed above the water surface. In other words the target has an apparent location to the observer which differs from the real location. If a projectile is launched at the apparent image, as it would be using a conventional gun-sight, then the projectile will miss the target.
  • the design proposed here solves this problem by using a special gun-sight with various sensors and adjustment mechanisms that allow the observer to aim at the apparent target with a gun-sight viewer but automatically make the necessary compensations to shoot at the real target rather than the apparent one.
  • the Tishing Scope' is a type of gun-sight that differs from a normal gun-sight in that the viewer is not rigidly aligned with the gun barrel or projectile direction but is mounted on a pivot and has an angular displacement servo mechanism or other adjustment device that is able to adjust the relative angle between the gun-sight viewer and the gun barrel (i.e. the projectile direction).
  • the fishing scope is therefore able to automatically adjust to a relative vertical angle of alignment with the gun barrel to allow for the effects of surface refraction of light as the target image passes through the water surface.
  • the adjustment is made automatically via the servo, or other adjustment mechanism, in response to the readings of various sensors attached to, or integrated with, the gun-sight (see details for the description of sensors).
  • the sensor readings are processed through a computer, or dedicated electronic chip, to determine the displacement (or position) of the servo required to achieve a calculated relative vertical angle between the projectile target direction and the sight direction.
  • a computer or dedicated electronic chip
  • the design enables surface to underwater fishing or target shooting by removing the problem of estimating the effects of water surface-to-air light of refraction.
  • the design is applicable to rivers, lakes and sea fishing. It can be mounted on a gun, crossbow, bow or any other means of aiming and firing a projectile.
  • the viewer also has a focus mechanism with a sensor to read the current focal distance of the viewer. The user focuses the viewer on the target (or auto focus) then a sensor reads the focal distance and feeds it to the computer. The focal distance is one of the parameters used to determine the servo mechanism response in order to achieve the required 'delta' angle.
  • Gun Typical gun, crossbow or other aimer device for shooting a projectile.
  • the proposed design does not include the gun itself but just the carriage which is mounted on the gun.
  • Servo The servo mechanism is driven by the computer and is used to pivot the viewer to a relative angle to the gun such that the viewer points at the apparent image of the underwater target while the gun points directly at the target.
  • Differential Pressure Gauge - Sensor device usually a tube filled with fluid
  • the lower end has a float that floats on the water and may simply contain a pressure sensor to allow it to determine the height to the other end of the instrument.
  • the higher end is attached to the height datum point on the gun.
  • the line extending from the gun shows the path of the projectile to the target.
  • the lines extending from the viewer show the path of the light from the target, refracted through the water surface and into the viewer.
  • the Delta angle has been set by the onboard computer or chip, based on the instrument readings, to make the two lines converge in the fishing scope at the same time.
  • the main components of the design are a telescopic or electronic viewer mounted on horizontal hinged connection (or pivot) to the 'carriage'.
  • the carriage is designed to be mounted rigidly on the gun and aligned with the projectile direction, the carriage should contain the electronics and the power pack to drive the electronics.
  • a linear servo mechanism should be located between the viewer and the carriage so that any adjustment of the servo position setting will change the relative angle of orientation between the viewer and the carriage.
  • the instruments outlined below should be mounted on either the viewer or the carriage (Note: the mathematical model used to determine the required adjustments must take account of the specific configuration) - See Fig 1.
  • the gun-sight requires several physical/geometrical parameters (angles and distances) to be read by the on-board instrumentation for the design to work. These are:
  • the tilt angle of the viewer can be read by a standard gravity based device for measuring tilt. Generally this type of device would work by gravity and use an eccentric weight mounted on a spindle with very free rotation. The rotation angle is then read using an angular measuring device attached to the spindle. Other gravity based tilt measuring devices may be used.
  • the tilt device should be integral to the fishing scope such that it is rigidly mounted on the viewer side of the pivot between the viewer and the gun. This allows the viewer 'tilt angle' in the vertical plane to be read by the tilt instrument.
  • the vertical height of the scope above the water surface is read using a tubular instrument filled with fluid.
  • a tubular instrument filled with fluid On one end of the tube is a float and in the float is a pressure sensor. To use the gun the float must be placed in the water and allowed to float on the surface of the water. The pressure sensor in the float reads the pressure of the fluid at the water surface, which is then used to determine the vertical height position of the other end of the tube.
  • the free end of the tube should be attached to the fishing scope via an electrical connection.
  • the pressure reading is passed through a wire in the tube or tube wall from the pressure sensor in the float to an electrical socket on the fishing scope. The reading this instrument gives is therefore the height of a datum point on the scope above the surface of the water.
  • the rotation of the focus mechanism should be calibrated to the focal distance, therefore allowing the rotation of the focus mechanism to be converted to a focal distance. If the target is brought into focus (either manually or by auto focus) then the distance from the gun sight to the target can be read by the instrument.
  • the distance from the viewer to the target could be read by using a laser distance measuring device. Tests are required to make sure that readings can be made through the water surface and considerations should be given to the possibility of the laser disturbing the target (in the case offish or similar) for this method to be a feasible alternative.
  • the above readings provide all the information required to calculate the necessary delta angle between the projectile and the scope viewer in order to direct the gun projectile directly at the underwater target when the viewer is focussed on the target.
  • the nearer to the perpendicular to the water surface the gun is held the lower will be the relative angle.
  • the lower the angle of incidence of the viewer to the water surface i.e. the higher the angle from the vertical position
  • the higher the projectile adjustment angle is required.
  • the design requires some means of attaching a fishing line to the projectile and dispensing the line with low resistance when the projectile is fired. Means of reeling in the line may also be required. The inclusion of a modified fishing reel is a possibility. This is not part of the design patent but is a requirement for a functional fishing design in order to retrieve both the projectile and the catch.
  • the projectile may be a crossbow bolt or an arrow. In these case a barb on the projectile may be required to retain the speared fish. This is also not part of the design patent.
  • a switch of some kind may be required to start and/or stop the automatic adjustment mechanism from operating in order to prevent the scope from adjusting when simply being carried or moved.
  • the user should be able to hold down a conveniently mounted, spring loaded button, or to throw a switch to initiate the delta angle adjustment once he has focused the viewer on an underwater target.
  • the tilt instrument measures the angle of the viewer (not the gun).
  • the height datum is located on the viewer side of the pivot.
  • Viewer coordinates assume the pivot to be the origin, the viewer direction to be the H axis and the vertically up perpendicular to the viewer direction to be the V axis.
  • Gun coordinates assume the pivot to be the origin, the projectile direction to be the H axis and the vertically up perpendicular to the projectile direction to be the V axis.
  • Geometrical Constants p2fH — Horizontal distance from the pivot to the focal point (in viewer coords). ⁇ 2fV - Vertical distance from the pivot to the focal point (in viewer coords). ⁇ 2hH - Horizontal distance from the pivot to the height datum point (in viewer coords). p2hV - Vertical distance from the pivot to the height datum point (in viewer coords). p2gV - Offset distance from the projectile line to the delta pivot (in gun coordinates).
  • the AppEQ function tests if the value is approximately zero within tolerance. This calculation assumes a configuration of the device where the tilt angle and the height datum exist on the viewer side of the pivot. Other configurations with one or both these sensors operating on the gun side of the pivot are possible but the above model must be modified to suit. If a linear servo mechanism is used to adjust the delta angle then the angle must be converted to a linear displacement according to the geometrical location of the servo mechanism end pivots.
  • the fishing scope is mounted on a gun, crossbow or other means of aiming and launching a projectile.
  • the differential pressure gauge is attached to the fishing scope and the float on the end of the tube is placed in the water. This is an instrument that allows the fishing scope to measure its vertical height from the water surface. The float ensures that the water surface is the datum height of the measurement.
  • the gun is aimed at the underwater target using the fishing scope viewer and is therefore pointed at the water surface with some angle of incidence (i.e. the angle that the view direction strikes the water surface).
  • the target is then brought into focus by either manual or automatic adjustment of the focus screw mechanism on the viewer.
  • a sensor on the viewer focus adjustment mechanism now allows the fishing scope to measure the linear distance to the target using the focal length setting of the fishing scope viewer.
  • the laser is simply aimed at the target and a distance reading can be automatically read by the scope sensor using laser distance reading technology.
  • a tilt sensor instrument is installed integrally with the scope to provide an 'angle of tilt' measurement reading as a parameter for electronic input. This parameter is the tilt angle of the gun to the horizontal.
  • the fishing scope responds to the various input parameters (i.e. tilt of scope, height to water, distance to target, geometry of gun and scope — see later) and automatically adjusts the viewer alignment, via the servo mechanism, to the necessary calculated 'delta' angle (the angle between the alignment of the viewer and the alignment of the gun).
  • the user must now respond by raising or lowering the aim of the gun to realign the viewer to the target and therefore repeat the procedure from step 2. As the user makes these adjustments the aim of the gun will settle down so no more automatic adjustments are made by the fishing scope.
  • the viewer is now aimed at the apparent position of the target and the gun is aimed directly at the real target.
  • the fishing scope adjustment will be continuous. It is therefore necessary for the user to home in on the target, adjusting the gun aim until the automatic adjustments are corroborated with the manual adjustments (of tilt and focal length) and the aim settles down (i.e. ceases adjusting automatically).

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  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Optics & Photonics (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Animal Husbandry (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne une lunette de visée pour la pêche, constituée par un viseur canon conçu pour être monté sur un fusil, un arc, une arbalète ou un dispositif de projection de missile, permettant à un sportif ou à un chasseur de tirer avec précision sur des cibles immergées depuis une position au-dessus de la surface de l'eau. Ce modèle comprend un mécanisme destiné à compenser la réfraction entre la surface de l'eau et l'air, qui se produit lorsque l'image de la cible traverse la surface de l'eau. Cette compensation signifie que la lunette de visée peut être focalisée sur l'image apparente de la cible immergée, alors que le projectile de fusil est ciblé directement sur la cible immergée réelle. Le principe de ce modèle est l'incorporation d'un pivot entre le chariot de montage de viseur canon et la lunette de visée, et d'un servomécanisme servant à régler l'angle d'alignement entre le chariot et la lunette. Le servomécanisme est entraîné par un ordinateur ou un dispositif électronique embarqué utilisant une réponse de servomécanisme basée sur les lectures de plusieurs instruments intégrés et un modèle mathématique géométrique implémentés dans l'ordinateur ou la puce. Les trois instruments sur lesquels la réponse de servomécanisme est fondée fournissent des lectures de : (a) l'inclinaison du viseur canon; (b) la distance du viseur canon par rapport à la surface de l'eau (c); la distance entre le viseur canon et la cible. L'inclinaison est mesurée par une jauge d'inclinaison incorporée. La hauteur est mesurée par un manomètre différentiel ou un mécanisme similaire relié au viseur canon à une extrémité et placé dans un flotteur sur l'eau à l'autre extrémité. La distance jusqu'à la cible est mesurée à partir d'un réglage de distance de focalisation ajustable de la lentille télescopique de la lunette. Les composants principaux de ce modèle sont présentés dans la figure 1. L'invention concerne un servomécanisme effectuant un ajustement angulaire dans le plan vertical situé entre un viseur optique et un fusil au moyen d'instruments servant à mesurer les trois paramètres suivants : distance jusqu'à la cible, inclinaison vers l'horizontal et hauteur au-dessus de l'eau. Des revendications spécifiques portent sur cet appareil pourvu d'un manomètre différentiel destiné à mesurer la distance jusqu'à la surface de l'eau ou l'utilisation d'un détecteur électronique d'inclinaison permettant de mesurer l'inclinaison du viseur canon par rapport à la surface de l'eau.
PCT/GB2008/050047 2007-01-29 2008-01-24 Lunette de visee pour la peche WO2008093135A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0701694.2 2007-01-29
GB0701694A GB2446206A (en) 2007-01-30 2007-01-30 Fishing scope

Publications (1)

Publication Number Publication Date
WO2008093135A1 true WO2008093135A1 (fr) 2008-08-07

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ID=37872982

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Application Number Title Priority Date Filing Date
PCT/GB2008/050047 WO2008093135A1 (fr) 2007-01-29 2008-01-24 Lunette de visee pour la peche

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GB (1) GB2446206A (fr)
WO (1) WO2008093135A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8464700B2 (en) 2010-08-18 2013-06-18 Kinsey Archery Products, Inc. Bowfishing method and apparatus
WO2014167276A1 (fr) * 2013-04-11 2014-10-16 Rowan Engineering Limited Appareil pour l'utilisation avec un viseur télescopique
CN108917644A (zh) * 2018-07-19 2018-11-30 工极（北京）智能科技有限公司 三维立体测量系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778139A (en) * 1955-04-04 1957-01-22 Furnari Paul Attachment for underwater harpoon guns
GB790269A (en) * 1955-11-25 1958-02-05 Francis Philip Whaley Improvements in or relating to harpoon guns and like devices
US3872853A (en) * 1971-10-29 1975-03-25 Suwa Tekko Sho Co Ltd Elastic band harpoon projecting device
DE9207429U1 (fr) * 1992-06-02 1992-10-22 Heller, Wolfgang, Dipl.-Holzw., 3250 Hameln, De
US20020026741A1 (en) * 2000-04-27 2002-03-07 Aguilar Rafael Javier Laser sub

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5448936A (en) * 1994-08-23 1995-09-12 Hughes Aircraft Company Destruction of underwater objects

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2778139A (en) * 1955-04-04 1957-01-22 Furnari Paul Attachment for underwater harpoon guns
GB790269A (en) * 1955-11-25 1958-02-05 Francis Philip Whaley Improvements in or relating to harpoon guns and like devices
US3872853A (en) * 1971-10-29 1975-03-25 Suwa Tekko Sho Co Ltd Elastic band harpoon projecting device
DE9207429U1 (fr) * 1992-06-02 1992-10-22 Heller, Wolfgang, Dipl.-Holzw., 3250 Hameln, De
US20020026741A1 (en) * 2000-04-27 2002-03-07 Aguilar Rafael Javier Laser sub

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8464700B2 (en) 2010-08-18 2013-06-18 Kinsey Archery Products, Inc. Bowfishing method and apparatus
WO2014167276A1 (fr) * 2013-04-11 2014-10-16 Rowan Engineering Limited Appareil pour l'utilisation avec un viseur télescopique
CN108917644A (zh) * 2018-07-19 2018-11-30 工极（北京）智能科技有限公司 三维立体测量系统

Also Published As

Publication number Publication date
GB2446206A (en) 2008-08-06
GB0701694D0 (en) 2007-03-07

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