CA1060688A - Target screen assembly with synchronised movement - Google Patents
Target screen assembly with synchronised movementInfo
- Publication number
- CA1060688A CA1060688A CA241,937A CA241937A CA1060688A CA 1060688 A CA1060688 A CA 1060688A CA 241937 A CA241937 A CA 241937A CA 1060688 A CA1060688 A CA 1060688A
- Authority
- CA
- Canada
- Prior art keywords
- sheet
- roller
- take
- screen
- sheets
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
- F41J5/00—Target indicating systems; Target-hit or score detecting systems
- F41J5/10—Cinematographic hit-indicating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
- F41J1/00—Targets; Target stands; Target holders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
- F41J9/00—Moving targets, i.e. moving when fired at
- F41J9/14—Cinematographic targets, e.g. moving-picture targets
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Toys (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
Abstract of the Disclosure A screen assembly particularly suitable for use as part of gunnery training equipment is disclosed. The screen assembly comprises first feed and take-up rollers for moving a first sheet of material across a screen area, in a first plane, and second feed and take-up rollers for passing a second sheet of material across the screen area in a plane parallel to the first plane. This forms a screen of two overlapping layers over the screen area. The two sheets are moveable in different directions to alter the respective areas of the sheets in mutually overlapping relation.
So as to obliterate holes produced by previous shots.
So as to obliterate holes produced by previous shots.
Description
lO~Oti~3 This invention relates to screen assemblies and is concerned partic-ularly with screen assemblies forming part of gunnery training equipment.
A known form of gunnery training equipment comprises a projector which projects onto a screen area a moving image serving as a target for a trainee gunner or infantryman who fires his weapon at the moving target. Move-ment of the film ceases when the weapon is fired, such synchronisation being achieved by an acoustic detector (e.g. a microphone) or by electrical means linked to the trigger of the weapon. The position of a hole in the screen ~formed by the passage of a bullet from the weapon) in relation to the target, the image of ~hich is now stationar~ on the screen, provides an indication of marksmanship. As an aid to identifying the position of the hole, the latter is illuminated by lights which are positioned behind the screen and which are lit only during the assessment period when the image is stationary.
The presence of holes in the screen from previous shots can naturally be troublesome and misleading, and an object of the invention is to provide a screen assembl~ in which the holes from previous shots can be obliterated.
According to the invention there is provided a gunnery training aid comprising a projector for projecting a moving image of a target onto a screen assembl~, means for halting the projector when a weapon is fired at the target and a light for illuminating the side of the screen assembly opposite the pro-jector to reveal the position of a hole in the screen caused by the firing of the weapon, the screen assembly comprising a first feed roller and a first ta~ke-up roller for moving a first sheet of material from the first feed roller across a screen area and in a first plane to the first take-up roller, and a second feed roller and a second take-up roller for passing a second sheet of material from the second feed roller across the screen area and in a second plane to the second take-up roller, the first and second planes being substan-B
.
.. .. . . . . .... . . . ... . . .
.. . .. . ~ , .. . . .
. . . .;, .
.- . .. . .. . . ... . . . ..
tially parallel and spaced apart by a small distance so that the sheets form a screen of two overlapping layers over the screen area, with the first and second sheets being movable in different directions to alter the respective areas of the sheets in mutually overlapping relationship, and a third feed roller and a third take-up roller for moving a third sheet of material from the third feed roller across the screen area and in a third plane to the third take-up roller, the third plane being parallel and close to the first and second planes, the first and second sheets being movable in mutually opposite directions and the third sheet being movable in a direction perpendicular to said opposite directions3 the third sheet moving to prevent the chance coin-cidence of a hole in the first sheet and a hole in the second sheet from re-vealing a false hole on illumination of the screen assembly.
Gunnery training equipment representing a preferred embodiment of the invention will now be describedJ b~ way of example, with reference to the accompanying drawingsJ in which:-Figure 1 is a diagrammatic plan view of the gunnery training equipment;
Figure 2 is a rear perspective view of a screen assembly;
Figure 3 is a sectional viewJ on an enlarged scale and with certain parts omitted for clarityJ on the lines III^III of Figure 2; and ;~ :
2Q Figure 4 is a fragmentary view looking in the direction of the arrow A in Figure 3.
Referring to Figure 1, the training equipment comprises a projector 1 ~:
which projects on to the screen assembly 2 a moving image which serves as a target for trainee gunners or infantrymen 3 who fire their weapons in successionat the moving targetJ ~.
,-.
l~)tiO6bl~l 1 under the control and supervision of a range of~icer 4 The projector 1 is controlled by electrical control means having a console 5. Movement o~ the ~ ceases when each weapon is ~ired, such sy~chronisation being achieved by an electrical cable 6 linking the weapon and the console 5 or by audible sensing means, such as a microphone~
~ he screen assembly 2 comprises two sheets o~ whi~e paper, namely a first sheat 7 which extends between a ~irst vertical feed roller 8 on the right-hand side of ~he screen assembly 2 (considering the latter ~iewed from the front) and a first vertical take-llp roller 9 on the left-hand side of the screen assembly 2, and a second sheat 10 which extends between a second vertical feed roller 12 on the left-han~ side of the screen assembly 2 and a second take-up roller 13 on the right-hand~side of the screen assembly 2. The ~irst take-up roller 9 is rotatably dri~en by an electric motor 14 to cause the ~irst .
sheet.7 to be drawn horizontally (by small increments i~ step-wise fashi.on) from right to left across the screen, the first sheet 7 being drawn off the first feed roller 8 and onto the ~irst take-up roller 9. The second take-up roller 13 is associated with a seco~d electric motor 15 which enables the second sheet 10 to be drawn horizontally across the screen from le~t to right, also by s~all. increments in step-wise fashion.
- - Brakes 16 fitted to the feed rollers pre~ent the sheets ~ 7 and 10 from overrunning on cessation of rotatlon of the - respecti~e take-up rollers, ensuring ~hat the sheets spanning -' ' :,, ' :, ~ . . -,, ,; f . .. ... .. . .. .
., . ;. i , e screen area are -taut. The two sheets pass around respective vertical guide rollers (generall.y designated 17) positioned at the sides of the screen in such manner that the two sheets 7 and 10 span the screen area in closely spaced vertical planes.
A third sheet o paper 18 is arranged behind the two white sheets 7 and 10 and extends between a.horizontal feed roller 19 at the top of the screen and a horizontal take-up roller 20 at the ~ottom of the screen. The third sheet of paper 18 is black and, over the screen area~ occupies.a vertical plane spaced closely behind the plane occupied by the white sheet 10, as.
shown in Figure 3. Whilst the planes occupied by the three sheets 7, 10 and 18 are, strictly speakin~, spaced from one another the three sheets ~.ake light contact. A third electric motor 22 drives the horizontal take-up roller 20-and causes the black paper 18 to move vertically downwardly in small increments~
the black paper ~elng drawn off the horizontal feed roller 19 . -~passing through a nip between the latter and a trough 21) and thence around ~ horizontai guide roller 23. The black paper passes downwardly and passes partially around the driven horizontal take-up roller 20. At each of four positions along the driven horizontal take-up roller 20, there is disposed a pair of pressure rollers 24 carried by a cradle 2S supported by vertical compressi~n springs 26. The rollers 24 bear against respective sides of the driven horizontal take-up roller 20 and form nips throuah which the black paper 18 is driven. The described arran~e.~ent of pressure and guide rollers has the : .
.
effect of braking the black paper 18 and preventing slackness - .- ' ;, S
- ~
. . . . ~
... ~ . , .. ~ . f ~
in the black paper 18 over the screen area. Us2d black paper issuing from the driven horizontal -take-up roller 20 is cut of* wh~n necessary.
The-power drive to the three -take-up rollers 9, 13 and 20 can be disengaged. The roller 20 can be manually rotated by grippin~ the roller itself whilst handwheels 27 are provided on the ends of the take-up rollers 9 and 13. In the case of the two vertical take-up rollers 9 and 13, individual clutches 28 enable disengagement o the drive to be effected, whilst in the case of the horizontal take-up roller a dog drive may be disengaged.
The screen assembly is a collapsible, portable unit which is erected in front of the proiector 1 of the gunnery training equipment and is electrically linked by a lead 29 to the central console 5 governing operation o the complete gunnèry training equipment. After a bullet has punctured all three sheets of paper (the projector now projecting a stationary image which has been raised to compensate for projectile drop~
the back lighting is automatically switched on for an assessment period7 typically four seconds. The three motors 14, 15 and 22 are then energised for a short period, which is preselected by a timer unit7 each motor causing incremental linear movement of the corresponding sheet of paper by an amount between 1/4in. and 7/16in. The individual holes in the three sheets are thùs moved out of registration and the projector is re-started to project a moving image ready for~the next sequence.
The invention described herein may be used in a~sociation .
- . ': . :~ .
. - , .
~. . , ,- . .
with the invention disclosed in our co-pending Application No. 241,938.
.. ' ' ' . .'' ~:, " " .' ' . ': ' . ~ ''-,,'-,' .
. .....
....
~- ,.. ..
: . .
A known form of gunnery training equipment comprises a projector which projects onto a screen area a moving image serving as a target for a trainee gunner or infantryman who fires his weapon at the moving target. Move-ment of the film ceases when the weapon is fired, such synchronisation being achieved by an acoustic detector (e.g. a microphone) or by electrical means linked to the trigger of the weapon. The position of a hole in the screen ~formed by the passage of a bullet from the weapon) in relation to the target, the image of ~hich is now stationar~ on the screen, provides an indication of marksmanship. As an aid to identifying the position of the hole, the latter is illuminated by lights which are positioned behind the screen and which are lit only during the assessment period when the image is stationary.
The presence of holes in the screen from previous shots can naturally be troublesome and misleading, and an object of the invention is to provide a screen assembl~ in which the holes from previous shots can be obliterated.
According to the invention there is provided a gunnery training aid comprising a projector for projecting a moving image of a target onto a screen assembl~, means for halting the projector when a weapon is fired at the target and a light for illuminating the side of the screen assembly opposite the pro-jector to reveal the position of a hole in the screen caused by the firing of the weapon, the screen assembly comprising a first feed roller and a first ta~ke-up roller for moving a first sheet of material from the first feed roller across a screen area and in a first plane to the first take-up roller, and a second feed roller and a second take-up roller for passing a second sheet of material from the second feed roller across the screen area and in a second plane to the second take-up roller, the first and second planes being substan-B
.
.. .. . . . . .... . . . ... . . .
.. . .. . ~ , .. . . .
. . . .;, .
.- . .. . .. . . ... . . . ..
tially parallel and spaced apart by a small distance so that the sheets form a screen of two overlapping layers over the screen area, with the first and second sheets being movable in different directions to alter the respective areas of the sheets in mutually overlapping relationship, and a third feed roller and a third take-up roller for moving a third sheet of material from the third feed roller across the screen area and in a third plane to the third take-up roller, the third plane being parallel and close to the first and second planes, the first and second sheets being movable in mutually opposite directions and the third sheet being movable in a direction perpendicular to said opposite directions3 the third sheet moving to prevent the chance coin-cidence of a hole in the first sheet and a hole in the second sheet from re-vealing a false hole on illumination of the screen assembly.
Gunnery training equipment representing a preferred embodiment of the invention will now be describedJ b~ way of example, with reference to the accompanying drawingsJ in which:-Figure 1 is a diagrammatic plan view of the gunnery training equipment;
Figure 2 is a rear perspective view of a screen assembly;
Figure 3 is a sectional viewJ on an enlarged scale and with certain parts omitted for clarityJ on the lines III^III of Figure 2; and ;~ :
2Q Figure 4 is a fragmentary view looking in the direction of the arrow A in Figure 3.
Referring to Figure 1, the training equipment comprises a projector 1 ~:
which projects on to the screen assembly 2 a moving image which serves as a target for trainee gunners or infantrymen 3 who fire their weapons in successionat the moving targetJ ~.
,-.
l~)tiO6bl~l 1 under the control and supervision of a range of~icer 4 The projector 1 is controlled by electrical control means having a console 5. Movement o~ the ~ ceases when each weapon is ~ired, such sy~chronisation being achieved by an electrical cable 6 linking the weapon and the console 5 or by audible sensing means, such as a microphone~
~ he screen assembly 2 comprises two sheets o~ whi~e paper, namely a first sheat 7 which extends between a ~irst vertical feed roller 8 on the right-hand side of ~he screen assembly 2 (considering the latter ~iewed from the front) and a first vertical take-llp roller 9 on the left-hand side of the screen assembly 2, and a second sheat 10 which extends between a second vertical feed roller 12 on the left-han~ side of the screen assembly 2 and a second take-up roller 13 on the right-hand~side of the screen assembly 2. The ~irst take-up roller 9 is rotatably dri~en by an electric motor 14 to cause the ~irst .
sheet.7 to be drawn horizontally (by small increments i~ step-wise fashi.on) from right to left across the screen, the first sheet 7 being drawn off the first feed roller 8 and onto the ~irst take-up roller 9. The second take-up roller 13 is associated with a seco~d electric motor 15 which enables the second sheet 10 to be drawn horizontally across the screen from le~t to right, also by s~all. increments in step-wise fashion.
- - Brakes 16 fitted to the feed rollers pre~ent the sheets ~ 7 and 10 from overrunning on cessation of rotatlon of the - respecti~e take-up rollers, ensuring ~hat the sheets spanning -' ' :,, ' :, ~ . . -,, ,; f . .. ... .. . .. .
., . ;. i , e screen area are -taut. The two sheets pass around respective vertical guide rollers (generall.y designated 17) positioned at the sides of the screen in such manner that the two sheets 7 and 10 span the screen area in closely spaced vertical planes.
A third sheet o paper 18 is arranged behind the two white sheets 7 and 10 and extends between a.horizontal feed roller 19 at the top of the screen and a horizontal take-up roller 20 at the ~ottom of the screen. The third sheet of paper 18 is black and, over the screen area~ occupies.a vertical plane spaced closely behind the plane occupied by the white sheet 10, as.
shown in Figure 3. Whilst the planes occupied by the three sheets 7, 10 and 18 are, strictly speakin~, spaced from one another the three sheets ~.ake light contact. A third electric motor 22 drives the horizontal take-up roller 20-and causes the black paper 18 to move vertically downwardly in small increments~
the black paper ~elng drawn off the horizontal feed roller 19 . -~passing through a nip between the latter and a trough 21) and thence around ~ horizontai guide roller 23. The black paper passes downwardly and passes partially around the driven horizontal take-up roller 20. At each of four positions along the driven horizontal take-up roller 20, there is disposed a pair of pressure rollers 24 carried by a cradle 2S supported by vertical compressi~n springs 26. The rollers 24 bear against respective sides of the driven horizontal take-up roller 20 and form nips throuah which the black paper 18 is driven. The described arran~e.~ent of pressure and guide rollers has the : .
.
effect of braking the black paper 18 and preventing slackness - .- ' ;, S
- ~
. . . . ~
... ~ . , .. ~ . f ~
in the black paper 18 over the screen area. Us2d black paper issuing from the driven horizontal -take-up roller 20 is cut of* wh~n necessary.
The-power drive to the three -take-up rollers 9, 13 and 20 can be disengaged. The roller 20 can be manually rotated by grippin~ the roller itself whilst handwheels 27 are provided on the ends of the take-up rollers 9 and 13. In the case of the two vertical take-up rollers 9 and 13, individual clutches 28 enable disengagement o the drive to be effected, whilst in the case of the horizontal take-up roller a dog drive may be disengaged.
The screen assembly is a collapsible, portable unit which is erected in front of the proiector 1 of the gunnery training equipment and is electrically linked by a lead 29 to the central console 5 governing operation o the complete gunnèry training equipment. After a bullet has punctured all three sheets of paper (the projector now projecting a stationary image which has been raised to compensate for projectile drop~
the back lighting is automatically switched on for an assessment period7 typically four seconds. The three motors 14, 15 and 22 are then energised for a short period, which is preselected by a timer unit7 each motor causing incremental linear movement of the corresponding sheet of paper by an amount between 1/4in. and 7/16in. The individual holes in the three sheets are thùs moved out of registration and the projector is re-started to project a moving image ready for~the next sequence.
The invention described herein may be used in a~sociation .
- . ': . :~ .
. - , .
~. . , ,- . .
with the invention disclosed in our co-pending Application No. 241,938.
.. ' ' ' . .'' ~:, " " .' ' . ': ' . ~ ''-,,'-,' .
. .....
....
~- ,.. ..
: . .
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A gunnery training aid comprising a projector for projecting a moving image of a target onto a screen assembly, means for halting the projector when a weapon is fired at the target and a light for illuminating the side of the screen assembly opposite the projector to reveal the position of a hole in the screen caused by the firing of the weapon, the screen assembly comprising a first feed roller and a first take-up roller for moving a first sheet of mater-ial from the first feed roller across a screen area and in a first plane to the first take-up roller, and a second feed roller and a second take-up roller for passing a second sheet of material from the second feed roller across the screen area and in a second plane to the second take-up roller, the first and second planes being substantially parallel and spaced apart by a small distance so that the sheets form a screen of two overlapping layers over the screen area, with the first and second sheets being movable in different directions to alter the respective areas of the sheets in mutually overlapping relation-ship, and a third feed roller and a third take-up roller for moving a third sheet of material from the third feed roller across the screen area and in a third plane to the third take-up roller, the third plane being parallel and close to the first and second planes, the first and second sheets being movable in mutually opposite directions and the third sheet being movable in a direc-tion perpendicular to said opposite directions, the third sheet moving to pre-vent the chance coincidence of a hole in the first sheet and a hole in the second sheet from revealing a false hole on illumination of the screen assembly.
2. A gunnery training aid according to claim 1, wherein the first, second and third planes are all vertical planes, the first and second sheets being movable in mutually opposite horizontal directions and the third sheet being movable vertically downwardly.
3. A gunnery training aid according to claim 1, wherein the first and second sheets are sheets of white paper and the third sheet is a sheet of black paper.
4. A gunnery training aid according to claim 1, wherein the take-up rollers are driven by electric motors.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2678575A GB1522832A (en) | 1975-06-24 | 1975-06-24 | Gunnery training aids having screen assemblies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060688A true CA1060688A (en) | 1979-08-21 |
Family
ID=10249165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA241,937A Expired CA1060688A (en) | 1975-06-24 | 1975-12-17 | Target screen assembly with synchronised movement |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1060688A (en) |
| FR (1) | FR2315708A1 (en) |
| GB (1) | GB1522832A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015056212A3 (en) * | 2013-10-15 | 2015-06-18 | Zen Technologies Limited | A device configuration to provide gunnery training and method of assembly |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2445505A1 (en) * | 1978-12-26 | 1980-07-25 | Serec | Gun cartridge for training marksman - houses battery, bulb and lens producing beam of light focussed on to moving image of target |
| DE2944156A1 (en) * | 1979-11-02 | 1981-05-14 | Mechanische Weberei Gmbh, 4792 Bad Lippspringe | Servo driven large projection screen - has screen unwound over alignment roller for even hanging |
| CH665901A5 (en) * | 1984-03-16 | 1988-06-15 | Polytronic Ag | IMAGE PROJECTION SHOOTING SYSTEM. |
| FR2649477B1 (en) * | 1989-07-07 | 1994-03-25 | Arachequesne Patrick | SHOOTING TRAINING DEVICE |
| US5823779A (en) * | 1996-05-02 | 1998-10-20 | Advanced Interactive Systems, Inc. | Electronically controlled weapons range with return fire |
| WO2001013172A1 (en) * | 1999-08-11 | 2001-02-22 | Barco N.V. | Projection screen and methods of transport and erection of the same |
| FR2911952A1 (en) | 2007-01-29 | 2008-08-01 | De Boisanger Antoine Breart | Target e.g. animated image for e.g. infantryman, has screen made of geotextile material e.g. polyester, and another screen made of paper, where support has hanging frame with longitudinal posts, which support former screen |
| FR2911966B1 (en) * | 2007-01-31 | 2009-10-02 | Thales Sa | PROJECTION SCREEN AND VIDEO SYSTEM TRANSPORTABLE PROJECTION. |
| CN103257520A (en) * | 2013-05-27 | 2013-08-21 | 苏州和氏设计营造股份有限公司 | Large-breadth horizontal curtain pulling device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR776093A (en) * | 1935-07-12 | 1935-01-16 | Gen La Cinematographie Francai | Improvements to animated shooting cabinets |
| DE1018337B (en) * | 1954-05-26 | 1957-10-24 | Siemens Ag | Cinematographic target wall |
| FR1194904A (en) * | 1957-06-06 | 1959-11-13 | Bauer Eugen Gmbh | projection screen for cinematographic shooting installations |
-
1975
- 1975-06-24 GB GB2678575A patent/GB1522832A/en not_active Expired
- 1975-12-17 CA CA241,937A patent/CA1060688A/en not_active Expired
-
1976
- 1976-03-04 FR FR7606105A patent/FR2315708A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015056212A3 (en) * | 2013-10-15 | 2015-06-18 | Zen Technologies Limited | A device configuration to provide gunnery training and method of assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1522832A (en) | 1978-08-31 |
| FR2315708A1 (en) | 1977-01-21 |
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