Title:
Frequency responsive light target
United States Patent 3918714
Abstract:
A simulated target shooting apparatus comprising a source of modulated light having a pre-set frequency. The light takes the form of a target image. A weapon facsimile is provided which cooperates with a receiving device comprising a photocell and a detector adapted to select one one of the different signals sent-out by said photocell when hit by light rays. The signals so generated are forwarded to supply a hit target indicating signal.
US Patent References:
Target projection apparatus
Arizpe - October 1960 - 2957695
Photosensitive light gun
Glaser - September 1964 - 3151248
Photoelectric target practice pistol
Rabinowitz - September 1966 - 3271032
LIGHT PROJECTING AND SENSING DEVICE AND TARGET PRACTICE APPARATUS
Lemelson - March 1970 - 3499650
LASER MARKMANSHIP TRAINER
Sensney - January 1972 - 3633285
Target projection apparatus
Arizpe - October 1960 - 2957695
Photosensitive light gun
Glaser - September 1964 - 3151248
Photoelectric target practice pistol
Rabinowitz - September 1966 - 3271032
LIGHT PROJECTING AND SENSING DEVICE AND TARGET PRACTICE APPARATUS
Lemelson - March 1970 - 3499650
LASER MARKMANSHIP TRAINER
Sensney - January 1972 - 3633285
Application Number:
05/470525
Publication Date:
11/11/1975
Filing Date:
05/16/1974
View Patent Images:
Export Citation:
Primary Class:
Other Classes:
250/233
International Classes:
F41G3/26; F41J5/02; F41G3/00; F41J5/00; F41J5/02
Field of Search:
250/233,217 273/101.1,101.2,105.3
US Patent References:
Primary Examiner:
Pinkham, Richard C.
Assistant Examiner:
Siskind, Marvin
Attorney, Agent or Firm:
Threedy, Edward C.
Parent Case Data:
This is a continuation of application Ser. No. 243,603 filed Apr. 13, 1972 and now abandoned.
Claims:
I claim
1. A simulated target-shooting apparatus having a light source adapted to be projected upon a screen and a means within a simulated gun adapted to receive a light signal projected upon the screen from the light source, comprising
1. A simulated target-shooting apparatus having a light source adapted to be projected upon a screen and a means within a simulated gun adapted to receive a light signal projected upon the screen from the light source, comprising
Description:
BACKGROUND
This invention concerns an equipment for simulating a target shooting and can be utilized both for a game rifle range and, due to high shooting accuracy thereof, for sham target practice, said apparatus comprising a light source and photo-electric means for picking-up the light of said light source and supplying a hit target indicating and/or control signal.
Already known apparatuses of the above defined type usually comprise means for emitting a timed light beam in cooperation with a weapon facsimile, as well as a photocell associated with a target and adapted to be excited by the light beam sent-out by said weapon. Said known apparatuses have inherent drawbacks in that their photocell may become excited by a light source different from said light beam sent-out by the weapon, and accordingly said photocell must be set each time according to environmental light conditions in order to prevent wrong hit target signals. Moreover, the light beam sent-out by the weapon should have a minimum of light power in order to be able to excite the set photocell and therefore said beam cannot be narrowed at will to increase the shooting accuracy.
Therefore, an object of this invention is to provide a simulated target shooting apparatus of the type referred to, wherein said hit target indicating and/or control signal is supplied only when said photo-electric means are hit by the light rays of said light source, independently from the environmental conditions, as well as from the setting of said photo-electric means.
A further object of this invention is to provide an apparatus of the type referred to, wherein an unusually high fire accuracy can be obtained, and wherein the width of a light beam that is able to hit said photo-electric means may be adjusted at will in order to simulate different types of shooting.
SUMMARY
The above and further objects of this invention can be achieved by an apparatus of the type as above stated, wherein said light source is adapted to send-out a light modulated according to a pre-set frequency, and wherein said photo-electric means cooperate with detecting means adapted to select, amongst different signals sent-out by said photo-electric means when hit by different light rays, the signals generated by said modulated light and forward the same in order to supply said hit target indicating and/or control signal.
According to a preferred embodiment of this invention, said modulated light source is in the form of a target image, while said photo-electric means are associated with a weapon facsimile and are adapted to cooperate with optics and/or light ray guide means to narrow at will the max width of a light beam that is able to hit said photo-electric means, and then define the simulated shooting accuracy, shutter or switching means being provided for timing a picking-up period during which said detecting means are adapted to receive signals from said photo-electric means.
DRAWING
FIG. 1 is a diagrammatic view of a device for forming a target image.
FIG. 2 is a diagrammatic view of a receiving device, as associated with a rifle facsimile.
FIG. 3 is a diagrammatic view of photo-electric means and light beam guide and narrowing optics of said receiving device.
FIG. 4 is a perspective view of a component of said target image forming device.
PREFERRED EMBODIMENT
Referring to the drawing, the shown apparatus comprises a device adapted to form a light source having particular features (FIG. 1), as well as a receiving device (FIG. 2) sensitive to light signals from said source, the former device being associated with a target, whilst the latter device is associated with a rifle facsimile or the like.
Referring now to FIG. 1, the target forming device comprises a lamp 10 or other suitable light source and an optical reflector 12 by which the light of said lamp 10 is focused onto the focus F of a projector set 14. Within the same focal plane F is a plate 16 wherein at least one suitably shaped orifice is formed, through which the light focused by said reflector 12 is allowed to pass in order to be then projected onto a screen 20 in the form of a target image 18. Said screen 20 may be both of a transparent or a reflective type and said image 18 is formed accordingly on the right or reverse side of the same screen 20.
The light as sent-out by the lamp 10 is modulated e.g. by means of a slotted disc 22, which is positioned in such a manner as to interfere with the light beam focused by said reflector 12 and is driven by a motor 24 at a suitable angular speed, e.g. in such a manner as to obtain a frequency of 1,000- 2,000 interruptions per second. Such a frequency cannot be perceived by an human eye and a steady image is then seen, while said modulated light cannot be mistaked for other possible pulsating light sources.
Referring now to FIG. 2, a receiving device comprises a rifle facsimile 26 or the like, having a barrel 28 to which is associated a receiving photocell optics, adapted to forward signals to detecting means electrically connected therewith. More detailedly, when a rifle trigger 30 is pulled, a camera-type shutter fitted in front of a photocell is opened, or a switch 32 located downstream the same photocell is closed for a pre-set time. In both cases, signals are sent by same photocell through a lead 34 connected with detecting and selecting means, e.g. in the form of a conventional AC amplifier 36 which is set in such a manner as to amplify and forward only the signals coming from the photocell and modulated according to the frequency of the light sent by said target image 18. Thus, the apparatus cannot be influenced by the environmental light conditions and the amplified signal can be forwarded to a hit target indicating and metering device 38, as well as, if required, to a projector controlling apparatus 40, by which e.g. a solenoid 42 can be energized (see FIG. 4) in order to shift said plate 16 within guide means 44 and project an image of hit target (orifices 48) in substitution of a plain target image (orifice 46).
The optical and photo-electric receiving means as shown in FIG. 3 comprise a photocell 50, positioned in the focus of the lens 52 having an optical axis substantially coincident with the rifle aim line. Between said photocell 50 and lens 52 (that may consist of a lens set) is a diaphragm 54, having an opening 56 adapted to limit the visual angle from the photocell to said lens, and thus the width of a light beam by which said photocell can be hit. As it can be readily appreciated, by suitably varying the position of diaphragm 54 and/or the size of opening 56 and/or the focal length of lens 52, the width of said light beam can be adjusted at will, whereby to simulate different types of shooting, as e.g. a precision shooting with single ball cartridges or a shooting with small shot cartridges.
Both the photocell and the optical set may be fitted on movable supports (not shown) for an adjustment of the aim line. On the other hand, the target forming device, as shown in FIG. 1, may be movably fitted to form a movable image 18. Moreover, many changes may be made in the afore described devices, e.g. by providing a light modulation at different frequencies and suitable filtering means in the receiving device in order to have different shooting types easily selectable.
This invention concerns an equipment for simulating a target shooting and can be utilized both for a game rifle range and, due to high shooting accuracy thereof, for sham target practice, said apparatus comprising a light source and photo-electric means for picking-up the light of said light source and supplying a hit target indicating and/or control signal.
Already known apparatuses of the above defined type usually comprise means for emitting a timed light beam in cooperation with a weapon facsimile, as well as a photocell associated with a target and adapted to be excited by the light beam sent-out by said weapon. Said known apparatuses have inherent drawbacks in that their photocell may become excited by a light source different from said light beam sent-out by the weapon, and accordingly said photocell must be set each time according to environmental light conditions in order to prevent wrong hit target signals. Moreover, the light beam sent-out by the weapon should have a minimum of light power in order to be able to excite the set photocell and therefore said beam cannot be narrowed at will to increase the shooting accuracy.
Therefore, an object of this invention is to provide a simulated target shooting apparatus of the type referred to, wherein said hit target indicating and/or control signal is supplied only when said photo-electric means are hit by the light rays of said light source, independently from the environmental conditions, as well as from the setting of said photo-electric means.
A further object of this invention is to provide an apparatus of the type referred to, wherein an unusually high fire accuracy can be obtained, and wherein the width of a light beam that is able to hit said photo-electric means may be adjusted at will in order to simulate different types of shooting.
SUMMARY
The above and further objects of this invention can be achieved by an apparatus of the type as above stated, wherein said light source is adapted to send-out a light modulated according to a pre-set frequency, and wherein said photo-electric means cooperate with detecting means adapted to select, amongst different signals sent-out by said photo-electric means when hit by different light rays, the signals generated by said modulated light and forward the same in order to supply said hit target indicating and/or control signal.
According to a preferred embodiment of this invention, said modulated light source is in the form of a target image, while said photo-electric means are associated with a weapon facsimile and are adapted to cooperate with optics and/or light ray guide means to narrow at will the max width of a light beam that is able to hit said photo-electric means, and then define the simulated shooting accuracy, shutter or switching means being provided for timing a picking-up period during which said detecting means are adapted to receive signals from said photo-electric means.
DRAWING
FIG. 1 is a diagrammatic view of a device for forming a target image.
FIG. 2 is a diagrammatic view of a receiving device, as associated with a rifle facsimile.
FIG. 3 is a diagrammatic view of photo-electric means and light beam guide and narrowing optics of said receiving device.
FIG. 4 is a perspective view of a component of said target image forming device.
PREFERRED EMBODIMENT
Referring to the drawing, the shown apparatus comprises a device adapted to form a light source having particular features (FIG. 1), as well as a receiving device (FIG. 2) sensitive to light signals from said source, the former device being associated with a target, whilst the latter device is associated with a rifle facsimile or the like.
Referring now to FIG. 1, the target forming device comprises a lamp 10 or other suitable light source and an optical reflector 12 by which the light of said lamp 10 is focused onto the focus F of a projector set 14. Within the same focal plane F is a plate 16 wherein at least one suitably shaped orifice is formed, through which the light focused by said reflector 12 is allowed to pass in order to be then projected onto a screen 20 in the form of a target image 18. Said screen 20 may be both of a transparent or a reflective type and said image 18 is formed accordingly on the right or reverse side of the same screen 20.
The light as sent-out by the lamp 10 is modulated e.g. by means of a slotted disc 22, which is positioned in such a manner as to interfere with the light beam focused by said reflector 12 and is driven by a motor 24 at a suitable angular speed, e.g. in such a manner as to obtain a frequency of 1,000- 2,000 interruptions per second. Such a frequency cannot be perceived by an human eye and a steady image is then seen, while said modulated light cannot be mistaked for other possible pulsating light sources.
Referring now to FIG. 2, a receiving device comprises a rifle facsimile 26 or the like, having a barrel 28 to which is associated a receiving photocell optics, adapted to forward signals to detecting means electrically connected therewith. More detailedly, when a rifle trigger 30 is pulled, a camera-type shutter fitted in front of a photocell is opened, or a switch 32 located downstream the same photocell is closed for a pre-set time. In both cases, signals are sent by same photocell through a lead 34 connected with detecting and selecting means, e.g. in the form of a conventional AC amplifier 36 which is set in such a manner as to amplify and forward only the signals coming from the photocell and modulated according to the frequency of the light sent by said target image 18. Thus, the apparatus cannot be influenced by the environmental light conditions and the amplified signal can be forwarded to a hit target indicating and metering device 38, as well as, if required, to a projector controlling apparatus 40, by which e.g. a solenoid 42 can be energized (see FIG. 4) in order to shift said plate 16 within guide means 44 and project an image of hit target (orifices 48) in substitution of a plain target image (orifice 46).
The optical and photo-electric receiving means as shown in FIG. 3 comprise a photocell 50, positioned in the focus of the lens 52 having an optical axis substantially coincident with the rifle aim line. Between said photocell 50 and lens 52 (that may consist of a lens set) is a diaphragm 54, having an opening 56 adapted to limit the visual angle from the photocell to said lens, and thus the width of a light beam by which said photocell can be hit. As it can be readily appreciated, by suitably varying the position of diaphragm 54 and/or the size of opening 56 and/or the focal length of lens 52, the width of said light beam can be adjusted at will, whereby to simulate different types of shooting, as e.g. a precision shooting with single ball cartridges or a shooting with small shot cartridges.
Both the photocell and the optical set may be fitted on movable supports (not shown) for an adjustment of the aim line. On the other hand, the target forming device, as shown in FIG. 1, may be movably fitted to form a movable image 18. Moreover, many changes may be made in the afore described devices, e.g. by providing a light modulation at different frequencies and suitable filtering means in the receiving device in order to have different shooting types easily selectable.