Title:
Ice cannon combined with frozen projectile supply structure and target structure
United States Patent 3921980
Abstract:
A target shooting apparatus having a shooting station and a target station separated by a range area with a projectile launcher at the shooting station adapted to discharge frozen particles in a controlled trajectory at the target station. The projectile launcher is provided with a frozen projectile supply having a refrigeration plant for the freezing of an aqueous medium into a plurality of frozen projectiles and transport facilities are provided for delivering the frozen projectiles to the shooting station. In a typical embodiment, the refrigeration plant is a conventional ice cube maker with a suitable dispenser and pnuematic transport facilities for dispensing and delivering ice cubes to the breech of a simulated artillery piece such as a cannon for launching at a target such as a ship in an aquatic environment. The artillery piece has an outer housing which simulates the barrel of a cannon with an internal, resonator sleeve supported at its discharge end in which the barrel of the frozen projectile launcher is supported. The launcher is powered with a compressed gas and the resonator sleeve acoustically amplifies the release of air pressure from the barrel. The launcher is also provided with a breech body having a central, transverse bore in which is rotatably mounted a plug member. The plug member has a projectile chamber which, when the plug is rotated between loading and firing positions, assumes a generally coaxial extension with radial bores in the breech body.
US Patent References:
Pneumatic amusement machine gun
Feltman - February 1943 - 2312244
Gun-training apparatus
Swisher - April 1946 - 2398813
Ball projecting machine
Foster et al. - October 1950 - 2526018
Snowball gun
O'Dell - August 1952 - 2607333
Snowball maker and launcher
Smith - August 1960 - 2948275
Pneumatic amusement machine gun
Feltman - February 1943 - 2312244
Gun-training apparatus
Swisher - April 1946 - 2398813
Ball projecting machine
Foster et al. - October 1950 - 2526018
Snowball gun
O'Dell - August 1952 - 2607333
Snowball maker and launcher
Smith - August 1960 - 2948275
Application Number:
05/494723
Publication Date:
11/25/1975
Filing Date:
08/05/1974
View Patent Images:
Export Citation:
Assignee:
Walt, Disney Productions (Burbank, CA)
Primary Class:
Other Classes:
62/331, 473/569, 124/73, 124/77
International Classes:
A63F9/02; F25C5/00; F41B11/00; F41J1/18; F41J1/00; A63B65/12; F41J9/04; F41F1/04
Field of Search:
124/5,11R,27 273/101,105.4,105.5,16R 62/1,331,340
US Patent References:
| 3159011 | Apparatus for manufacture of flying targets | December 1964 | Kaluzny et al. | |
| 3359001 | Frangible target compacted of particulate ice or carbon dioxide | December 1967 | Silva | |
| 3371505 | Auger icemaker | March 1968 | Raver et al. | |
| 3434716 | SINKABLE TOY TARGET | March 1969 | Schwartz | |
| 3640081 | HOLLOW SPHERICAL ICE BODIES AND METHOD OF MAKING THE SAME | February 1972 | Hadden |
Primary Examiner:
Apley, Richard J.
Assistant Examiner:
Stouffer R. T.
Attorney, Agent or Firm:
Fulwider, Patton, Rieber, Lee & Utecht
Claims:
I claim
1. A target shooting apparatus comprising:
2. The target shooting apparatus of claim 1 wherein:
3. The target shooting apparatus of claim 2 wherein:
4. The target shooting apparatus of claim 1 wherein said projectile launching means comprises:
5. The target shooting apparatus of claim 4 wherein:
6. The target shooting apparatus of claim 5 wherein:
7. The target shooting apparatus of claim 5 wherein:
8. The target shooting apparatus of claim 1 wherein said dispensing means comprises a vibratory feeder having a vibrating pan bearing a spiral track on its inside perimeter discharging to a dispensing port communicating with said transport means.
9. The target shooting apparatus of claim 8 wherein said transport means comprises a conduit and blower means therein to pneumatically convey said frozen projectiles through said conduit.
10. The target shooting apparatus of claim 8 wherein said dispensing means includes a shuttle block reciprocally carried by a housing and having a cavity to receive frozen projectiles from said dispensing port and transfer said projectiles singly into said conduit of said transport means.
1. A target shooting apparatus comprising:
2. The target shooting apparatus of claim 1 wherein:
3. The target shooting apparatus of claim 2 wherein:
4. The target shooting apparatus of claim 1 wherein said projectile launching means comprises:
5. The target shooting apparatus of claim 4 wherein:
6. The target shooting apparatus of claim 5 wherein:
7. The target shooting apparatus of claim 5 wherein:
8. The target shooting apparatus of claim 1 wherein said dispensing means comprises a vibratory feeder having a vibrating pan bearing a spiral track on its inside perimeter discharging to a dispensing port communicating with said transport means.
9. The target shooting apparatus of claim 8 wherein said transport means comprises a conduit and blower means therein to pneumatically convey said frozen projectiles through said conduit.
10. The target shooting apparatus of claim 8 wherein said dispensing means includes a shuttle block reciprocally carried by a housing and having a cavity to receive frozen projectiles from said dispensing port and transfer said projectiles singly into said conduit of said transport means.
Description:
BACKGROUND OF THE INVENTION
1. Field of the Invention:
This invention relates to target shooting apparatus and, in particular to target shooting amusement devices.
2. Description of the Prior Art:
Target shooting apparatuses commonly found in amusement parks and the like are usually shooting galleries having small, hand guns where the cost of the projectiles and the labor in policing the target area and recovering the projectiles is relatively minor. Shooting apparatuses employing larger scale projectile launching means such as simulated artillery pieces, mortars, cannons, rock throwing machines, rocket launchers and the like have not found acceptance, despite their obvious attractiveness, because of the large expense associated with the manufacture and supply of the necessary projectiles as well as the labor in policing the target station and retrieving or removing the spent projectiles. Accordingly, there has not previously been provided any target shooting apparatus having a shooting station and a target station separated by a range of substantial distance and simulated artillery pieces.
SUMMARY OF THE INVENTION
This invention comprises a target shooting apparatus which employs frozen projectiles, preferably ice cubes, balls and the like, that can be launched by projectile launching means which simulate artillery pieces such as mortars, guns, cannons, rock throwing machines, rocket launchers and the like. In its preferred embodiment, the simulated artillery piece comprises an ice cannon and is used in combination with nautical targets such as boats, ships and the like which are supported at a target station, surrounded by an aquatic medium. The use of the frozen projectiles in the shooting apparatus eliminates the labor that would otherwise be required for the retrieving of spent projectiles, eliminates the need to interrupt the use of the apparatus for such retrieval, and also avoids the unsightly littering of the target station with spent projectiles. In the preferred embodiment, the frozen projectiles are manufactured with conventional refrigeration equipment such as an ice cube maker, thereby reducing, substantially, their cost of manufacture and providing inexpensive, expendable projectiles which degrade to innocuous waste products that disappear entirely into the target area environment.
The projectile launching means employed in the shooting apparatus, preferably, has a tubular housing which simulates the barrel of an artillery piece with a tubular, resonator member carried from its forward end and extending rearwardly and coaxially with the housing and terminating therein with a closed end plate. The barrel of the projectile launching means is mounted within the tubular housing with its forward end extending through and supported by the end plate of the resonator member. This construction provides means for acoustically amplifying the noise from the release of the compressed gas used in discharging the frozen projectile from the breach of the launching means.
The breach of the launching means is preferably provided with a plug member rotatably mounted therein and having a cross bore that forms the projectile chamber. The breach body includes two bores radially extending from the transverse bore which are aligned with the barrel of the launching means and with the frozen projectile delivery means so that the plug member can be rotated between loading and firing positions. Preferably, the projectile chamber of the plug bears a plastic liner to prevent the frozen particles from adhering to the surfaces of the chamber.
The delivery means for transporting the frozen projectiles from the site of their manufacture to the breech of the projectile launching means comprises a blower with conduit means extending from the blower discharge through the projectile dispensing means at the refrigeration site and conduit means extending from the dispensing means to the breech of the projectile launching means. In its preferred embodiment, the intake of the blower is connected to an exhaust port in the breech body whereby the projectiles are facilitated in their transport by the reduced pressure on the intake side of the blower.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the target shooting apparatus;
FIGS. 2-4 illustrate the frozen projectile dispensing means employed in the invention;
FIG. 5 is a cross-sectional, elevation view of the projectile launching means;
FIGS. 6-9 illustrate the breach mechanism employed in the projectile launching means; and
FIG. 10 illustrates the electrical and pneumatic controls employed in the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings and particularly FIGS. 1-3 thereof, a preferred form of ice cannon apparatus embodying the present invention includes a simulated cannon C that receives ice cube projectiles 11 from a cold storage chest S by means of a delivery conduit 12. The ice cubes are made by a conventional ice cube maker 13 mounted upon cold storage chest S. The cannon C shoots the ice cubes 11 at a target 14 surrounded by an aquatic environment 14a, as indicated by trajectory line 15. The ice cubes are transported from cold storage chest S through delivery conduit 12 pneumatically, such conduit 12 being in communication with the discharge of an air source A disposed in chest S and a return line 16 connected to the suction of air source A. The ice cubes 11 are propelled from cannon C by air pressure, such cannon being connected by pipe 18 to a source of compressed air 19.
More particularly, ice cube maker 13 may be of the type manufactured by Queen Products Division, King-Seeley Thermos Co., Albert Lea, Minnesota, and sold by Sears, Roebuck & Co. under the trademark "Scotsman." Such an ice cube maker makes ice cubes 11 of cylindrical cross-section. As shown in FIGS. 2 and 3, the lower portion of ice cube maker 13 is provided with a discharge chute 20 through which ice cubes 11 fall into the bowl 42 of a conventional vibratory parts feeder V, such as that sold by Syntron Division, FMC Corporation, Homer City, Pennsylvania, under the trademark "Syntron" (Model Series EB). The vibratory parts feeder V is disposed within the cold storage chest S. Bowl 42 is formed with a spirally inclined track 44 on the inside perimeter thereof. For the particular use contemplated by the present invention, bowl 42 is modified to include a vertical terminal port 46 of cylindrical cross-section dimensioned to receive the ice cubes 11 on the extreme radially outer end of the track 44. This port is aligned substantially normal to the surface of bowl 42. Immediately adjacent port 46, bowl 42 is further modified to include an end stop 48 which directs ice cubes 11 into the upper end of the port.
connected to the lower surface of port 46 is the upper end of a vertical, flexible transparent feeder hose 50 of a cylindrical transverse cross-section slightly larger than the cross-sectional dimension of ice cubes 11. The lower end of hose 50 is attached to the upper end of a cavity 52 of a shuttle block 53 that is slidably carried within a housing 54, shown in detail in FIG. 4. Shuttle block 53 is actuated by a conventional slave air cylinder and plunger unit 56 secured to the base 60 of cold storage chest S. Shuttle block 53 serves to transfer ice cubes 11 from feeder hose 50 to an aperture 58 formed in housing 54 in alignment with and interposed in delivery conduit 12, when shuttle block 53 is shifted from its solid outline position of FIG. 4 to its dotted outline position of such figure under the influence of cylinder and the plunger unit 56. An ice cube 11 a is then moved through the section of delivery conduit 12 below shuttle block housing 54 into cannon C by air pressure. Shuttle block housing 54 is provided with a horizontally slidable plate 62 below cavity 52 which is selectively retracted to the left from its closed position of FIGS. 2, 3 and 4 by a conventional solenoid actuator unit 64 in these figures whereby unused ice cubes (not shown) remaining in bowl 42 may be dumped. In this manner, bowl 42 is periodically emptied to receive a new charge of fresh ice cubes 11 as substitutes for ice cubes which have deteriorated with time within the bowl.
Referring now to FIGS. 5-9, delivery conduit 12 extends from aperture 58 to the bottom of caisson 68 of cannon C and then upwardly to a vertical bore 70 extending upwardly from the bottom surface of a loader, generally designated 72. At the upper front surface of loader 72, return fitting 16 is connected to a horizontal bore 104 that intersects bore 70. Loader 72 directs ice cubes into the actual barrel 84 of cannon C and includes a breech body 86 wherein are formed bores 70 and 74. Body 86 pivotally supports a metallic swivel plug 88 by bearings 90. Swivel plug 88 is formed with a bore 91 wherein is disposed a synthetic plastic cup 92 having dimensions just slightly larger than those of ice cubes 11 to define a frozen projectile chamber. Cup 92 is of plastic construction rather than metallic construction to insure ice cubes will not stick therein. A loader arm 94 is keyed to a sideward extension 96 of swivel plug 88 by means of which such plug can be swung from its ice cube-receiving position of FIGS. 7 and 9 to its cube-firing position of FIGS. 6 and 8. Loader arm 94 is pivotally connected to the push rod of a slave air cylinder 96, which air cylinder is actuated by a master cylinder unit to be described hereinafter for swinging loader arm and hence the swivel plug 88 between its cube-receiving and cube-firing positions. An aperture 98 is coaxially formed in the closed end of cup 92 and a rubber bumper ring 99 is secured within such closed end.
Horizontal bore 74 is aligned with actual barrel 84 of cannon C, as shown in FIGS. 6 and 8. Swivel plug 88 is formed with a port 100 that intersects cup aperture 98 when such block is in its loading position of FIGS. 7 and 9. At this time port 100 and aperture 98 are also aligned with a by-pass passage 102 formed in body 86 of loader 72, as seen in FIGS. 7-9. The upper end of by-pass passage 102 is in communication with return line 16 by a branch passage 104, shown particularly in FIGS. 8 and 9, whereby the reduced pressure of the air blower A intake can be applied to facilitate movement of the ice cubes into the chambers in plug 88. With continued reference to FIGS. 8 and 9, loader 72 is also formed with a horizontal supply port 105 aligned with actual barrel 80 and intersecting bores 70 and 74. Port 105 is connected to an air line 106 that extends rearwardly within cannon C to an air valve 108 shown in FIG. 5. A small vacuum line 114 intersects air line 106 adjacent loader 72 for a purpose to be described hereinbelow.
Referring again to FIG. 1 and additionally to FIG. 5, the cannon C includes a simulated barrel 116 which houses the aforementioned actual barrel 84. The front end of actual barrel 84 terminates inwardly of the front end of simulated barrel 116. A cylinder 118 coaxially surrounds actual barrel 84. The rear end of such cylinder is closed by a cap 120. This arrangement provides a resonant structure for acoustically amplifying the noise accompanying the sudden release of compressed air that propels the ice cubes 11 along the trajectory 15 towards target 14.
The elevation and azimuth of cannon C may be controlled in a conventional manner so as to permit the cannon user to aim the cannon at target 14. A trigger 121 shown in FIG. 1 extends from the rear portion of simulated barrel 116. Such trigger is connected to the actuating lever 122 of air valve 108 by a lanyard 126. Disposed rearwardly of air valve 108 within simulated barrel 116 is an air storage container 128 connected to air valve 108 by a short pipe 130. Air accumulator 128 receives compressed air through a tube 131 which is shown broken in FIG. 5 in the interest of clarity. As indicated in FIG. 5, the lower end of tube 131 is connected is connected to a T-fitting 132 positioned within the lower portion of caisson 68. The lower end of T-fitting 132 is connected to the aforementioned air supply pipe 18 which is shown connected to compressed air source 19 in FIG. 1. Forwardly of T-fitting 132 caisson 68 supports an auxiliary air storage tank 134, such tank receiving air from the center outlet of the T-fitting. The front end of tank 134 is connected to a master cylinder and piston unit 136, the latter being in communication with the aforementioned slave cylinder and plunger unit 96 by tubing 138 and 140.
Referring now additionally to FIG. 10, in the operation of the aforedescribed ice cannon apparatus there is provided a source of electrical power E (such as 24 volts AC) which is connected across a coin box 150 of conventional construction. The coin box includes a switch 151 which is adapted to be closed upon receipt of a predetermined value of coin. When the coin box switch 151 is closed the output therefrom energizes one set of terminals of two parallel push-to-close switches S-1 and S-4. Switch S-1 is disposed to be closed by the placement of the firing arm 124 in the "fire" position. In this position switch S-1 energizes both a "ready" light 152 indicating that the cannon C is ready to be fired and the contactor of a series-connected switch S-3. Switch S-3 is operatively connected to be closed by the actuation of trigger 122 to energize a coil 153 which pulls in the armature of air valve 108 thereby suddenly discharging the compressed air within accumulator 128. This charge of compressed air travels forwardly through air line 106 to loader 142. At this time swivel block 88 is disposed in its "fire" position of FIGS. 6 and 8. Accordingly, the ice cube 11 b disposed within cup 92 will be shot forwardly through actual barrel 84 along trajectory 15 towards target 14.
Also connected from the output of switch S-3 is the solenoid coil 154 of aforedescribed master control cylinder 134, which controls the operation of the aforedescribed slave cylinder 96. When energized through coil 154 the master control cylinder 134 rotates loader arm 94 and hence swivel block 88 to its "load" position of FIGS. 7 and 9. Upon reaching such "load" position, loader arm 94 depresses push-to-close switch S-4 also connected to outlet of coin box 150 which in turn energizes a coil 156 of a switching relay 157 to initiate a count in a conventional timer 159. At the completion of the count of timer 159 a firing coil of the master control cylinder 134 is energized to activate the loader arm 94 and hence swivel block 88 to its "fire" position of FIGS. 6 and 8. When the swivel block 88 has been disposed in proper "fire" position, loader arm 94 closes switch S-1 as described hereinabove.
Also connected to the output of switching relay 157 is a shuttle control coil 160 disposed to activate a master control cylinder 161 that controls the operation of aforedescribed cylinder and plunger unit 56 to thereby drive the shuttle block 53 from its solid outline position of FIG. 4 to its dotted outline position thereof whereby cavity 52 will be aligned with aperture 58. The ice cube 11 a shown in FIG. 4 will then be driven through delivery line 12 towards the loader 72. At the completion of the delay provided by timer 159 a return coil 162 on master cylinder 161 is energized so as to return shuttle block 53 to its solid outline position of FIG. 4 wherein another ice cube may fall into the cavity 52. The output signal of timer 159 also energizes a coil 170 on control valve 155 to move loading arm 94 and hence swivel block 88 to the "fire" position of FIGS. 6 and 8.
Timer 159 may be any conventional timer selectively set to provide a time delay that allows sufficient time for an ice cube to progress from shuttle block housing 54 to loader 72. Timer 159 may further include a conventional counter (not shown) which at the completion of a predetermined count of timing cycles disables the control system. In this manner a user of the cannon C will be provided with a plurality of shots for the coins dropped into coin box 150.
The invention has been described with reference to the presently preferred and illustrated mode of practice thereof. It is not intended that the invention be limited by the illustrated and preferred embodiment. Instead, it is intended that the invention be defined by the means and their obvious equivalents set forth in the following claims.
1. Field of the Invention:
This invention relates to target shooting apparatus and, in particular to target shooting amusement devices.
2. Description of the Prior Art:
Target shooting apparatuses commonly found in amusement parks and the like are usually shooting galleries having small, hand guns where the cost of the projectiles and the labor in policing the target area and recovering the projectiles is relatively minor. Shooting apparatuses employing larger scale projectile launching means such as simulated artillery pieces, mortars, cannons, rock throwing machines, rocket launchers and the like have not found acceptance, despite their obvious attractiveness, because of the large expense associated with the manufacture and supply of the necessary projectiles as well as the labor in policing the target station and retrieving or removing the spent projectiles. Accordingly, there has not previously been provided any target shooting apparatus having a shooting station and a target station separated by a range of substantial distance and simulated artillery pieces.
SUMMARY OF THE INVENTION
This invention comprises a target shooting apparatus which employs frozen projectiles, preferably ice cubes, balls and the like, that can be launched by projectile launching means which simulate artillery pieces such as mortars, guns, cannons, rock throwing machines, rocket launchers and the like. In its preferred embodiment, the simulated artillery piece comprises an ice cannon and is used in combination with nautical targets such as boats, ships and the like which are supported at a target station, surrounded by an aquatic medium. The use of the frozen projectiles in the shooting apparatus eliminates the labor that would otherwise be required for the retrieving of spent projectiles, eliminates the need to interrupt the use of the apparatus for such retrieval, and also avoids the unsightly littering of the target station with spent projectiles. In the preferred embodiment, the frozen projectiles are manufactured with conventional refrigeration equipment such as an ice cube maker, thereby reducing, substantially, their cost of manufacture and providing inexpensive, expendable projectiles which degrade to innocuous waste products that disappear entirely into the target area environment.
The projectile launching means employed in the shooting apparatus, preferably, has a tubular housing which simulates the barrel of an artillery piece with a tubular, resonator member carried from its forward end and extending rearwardly and coaxially with the housing and terminating therein with a closed end plate. The barrel of the projectile launching means is mounted within the tubular housing with its forward end extending through and supported by the end plate of the resonator member. This construction provides means for acoustically amplifying the noise from the release of the compressed gas used in discharging the frozen projectile from the breach of the launching means.
The breach of the launching means is preferably provided with a plug member rotatably mounted therein and having a cross bore that forms the projectile chamber. The breach body includes two bores radially extending from the transverse bore which are aligned with the barrel of the launching means and with the frozen projectile delivery means so that the plug member can be rotated between loading and firing positions. Preferably, the projectile chamber of the plug bears a plastic liner to prevent the frozen particles from adhering to the surfaces of the chamber.
The delivery means for transporting the frozen projectiles from the site of their manufacture to the breech of the projectile launching means comprises a blower with conduit means extending from the blower discharge through the projectile dispensing means at the refrigeration site and conduit means extending from the dispensing means to the breech of the projectile launching means. In its preferred embodiment, the intake of the blower is connected to an exhaust port in the breech body whereby the projectiles are facilitated in their transport by the reduced pressure on the intake side of the blower.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 illustrates the target shooting apparatus;
FIGS. 2-4 illustrate the frozen projectile dispensing means employed in the invention;
FIG. 5 is a cross-sectional, elevation view of the projectile launching means;
FIGS. 6-9 illustrate the breach mechanism employed in the projectile launching means; and
FIG. 10 illustrates the electrical and pneumatic controls employed in the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings and particularly FIGS. 1-3 thereof, a preferred form of ice cannon apparatus embodying the present invention includes a simulated cannon C that receives ice cube projectiles 11 from a cold storage chest S by means of a delivery conduit 12. The ice cubes are made by a conventional ice cube maker 13 mounted upon cold storage chest S. The cannon C shoots the ice cubes 11 at a target 14 surrounded by an aquatic environment 14a, as indicated by trajectory line 15. The ice cubes are transported from cold storage chest S through delivery conduit 12 pneumatically, such conduit 12 being in communication with the discharge of an air source A disposed in chest S and a return line 16 connected to the suction of air source A. The ice cubes 11 are propelled from cannon C by air pressure, such cannon being connected by pipe 18 to a source of compressed air 19.
More particularly, ice cube maker 13 may be of the type manufactured by Queen Products Division, King-Seeley Thermos Co., Albert Lea, Minnesota, and sold by Sears, Roebuck & Co. under the trademark "Scotsman." Such an ice cube maker makes ice cubes 11 of cylindrical cross-section. As shown in FIGS. 2 and 3, the lower portion of ice cube maker 13 is provided with a discharge chute 20 through which ice cubes 11 fall into the bowl 42 of a conventional vibratory parts feeder V, such as that sold by Syntron Division, FMC Corporation, Homer City, Pennsylvania, under the trademark "Syntron" (Model Series EB). The vibratory parts feeder V is disposed within the cold storage chest S. Bowl 42 is formed with a spirally inclined track 44 on the inside perimeter thereof. For the particular use contemplated by the present invention, bowl 42 is modified to include a vertical terminal port 46 of cylindrical cross-section dimensioned to receive the ice cubes 11 on the extreme radially outer end of the track 44. This port is aligned substantially normal to the surface of bowl 42. Immediately adjacent port 46, bowl 42 is further modified to include an end stop 48 which directs ice cubes 11 into the upper end of the port.
connected to the lower surface of port 46 is the upper end of a vertical, flexible transparent feeder hose 50 of a cylindrical transverse cross-section slightly larger than the cross-sectional dimension of ice cubes 11. The lower end of hose 50 is attached to the upper end of a cavity 52 of a shuttle block 53 that is slidably carried within a housing 54, shown in detail in FIG. 4. Shuttle block 53 is actuated by a conventional slave air cylinder and plunger unit 56 secured to the base 60 of cold storage chest S. Shuttle block 53 serves to transfer ice cubes 11 from feeder hose 50 to an aperture 58 formed in housing 54 in alignment with and interposed in delivery conduit 12, when shuttle block 53 is shifted from its solid outline position of FIG. 4 to its dotted outline position of such figure under the influence of cylinder and the plunger unit 56. An ice cube 11 a is then moved through the section of delivery conduit 12 below shuttle block housing 54 into cannon C by air pressure. Shuttle block housing 54 is provided with a horizontally slidable plate 62 below cavity 52 which is selectively retracted to the left from its closed position of FIGS. 2, 3 and 4 by a conventional solenoid actuator unit 64 in these figures whereby unused ice cubes (not shown) remaining in bowl 42 may be dumped. In this manner, bowl 42 is periodically emptied to receive a new charge of fresh ice cubes 11 as substitutes for ice cubes which have deteriorated with time within the bowl.
Referring now to FIGS. 5-9, delivery conduit 12 extends from aperture 58 to the bottom of caisson 68 of cannon C and then upwardly to a vertical bore 70 extending upwardly from the bottom surface of a loader, generally designated 72. At the upper front surface of loader 72, return fitting 16 is connected to a horizontal bore 104 that intersects bore 70. Loader 72 directs ice cubes into the actual barrel 84 of cannon C and includes a breech body 86 wherein are formed bores 70 and 74. Body 86 pivotally supports a metallic swivel plug 88 by bearings 90. Swivel plug 88 is formed with a bore 91 wherein is disposed a synthetic plastic cup 92 having dimensions just slightly larger than those of ice cubes 11 to define a frozen projectile chamber. Cup 92 is of plastic construction rather than metallic construction to insure ice cubes will not stick therein. A loader arm 94 is keyed to a sideward extension 96 of swivel plug 88 by means of which such plug can be swung from its ice cube-receiving position of FIGS. 7 and 9 to its cube-firing position of FIGS. 6 and 8. Loader arm 94 is pivotally connected to the push rod of a slave air cylinder 96, which air cylinder is actuated by a master cylinder unit to be described hereinafter for swinging loader arm and hence the swivel plug 88 between its cube-receiving and cube-firing positions. An aperture 98 is coaxially formed in the closed end of cup 92 and a rubber bumper ring 99 is secured within such closed end.
Horizontal bore 74 is aligned with actual barrel 84 of cannon C, as shown in FIGS. 6 and 8. Swivel plug 88 is formed with a port 100 that intersects cup aperture 98 when such block is in its loading position of FIGS. 7 and 9. At this time port 100 and aperture 98 are also aligned with a by-pass passage 102 formed in body 86 of loader 72, as seen in FIGS. 7-9. The upper end of by-pass passage 102 is in communication with return line 16 by a branch passage 104, shown particularly in FIGS. 8 and 9, whereby the reduced pressure of the air blower A intake can be applied to facilitate movement of the ice cubes into the chambers in plug 88. With continued reference to FIGS. 8 and 9, loader 72 is also formed with a horizontal supply port 105 aligned with actual barrel 80 and intersecting bores 70 and 74. Port 105 is connected to an air line 106 that extends rearwardly within cannon C to an air valve 108 shown in FIG. 5. A small vacuum line 114 intersects air line 106 adjacent loader 72 for a purpose to be described hereinbelow.
Referring again to FIG. 1 and additionally to FIG. 5, the cannon C includes a simulated barrel 116 which houses the aforementioned actual barrel 84. The front end of actual barrel 84 terminates inwardly of the front end of simulated barrel 116. A cylinder 118 coaxially surrounds actual barrel 84. The rear end of such cylinder is closed by a cap 120. This arrangement provides a resonant structure for acoustically amplifying the noise accompanying the sudden release of compressed air that propels the ice cubes 11 along the trajectory 15 towards target 14.
The elevation and azimuth of cannon C may be controlled in a conventional manner so as to permit the cannon user to aim the cannon at target 14. A trigger 121 shown in FIG. 1 extends from the rear portion of simulated barrel 116. Such trigger is connected to the actuating lever 122 of air valve 108 by a lanyard 126. Disposed rearwardly of air valve 108 within simulated barrel 116 is an air storage container 128 connected to air valve 108 by a short pipe 130. Air accumulator 128 receives compressed air through a tube 131 which is shown broken in FIG. 5 in the interest of clarity. As indicated in FIG. 5, the lower end of tube 131 is connected is connected to a T-fitting 132 positioned within the lower portion of caisson 68. The lower end of T-fitting 132 is connected to the aforementioned air supply pipe 18 which is shown connected to compressed air source 19 in FIG. 1. Forwardly of T-fitting 132 caisson 68 supports an auxiliary air storage tank 134, such tank receiving air from the center outlet of the T-fitting. The front end of tank 134 is connected to a master cylinder and piston unit 136, the latter being in communication with the aforementioned slave cylinder and plunger unit 96 by tubing 138 and 140.
Referring now additionally to FIG. 10, in the operation of the aforedescribed ice cannon apparatus there is provided a source of electrical power E (such as 24 volts AC) which is connected across a coin box 150 of conventional construction. The coin box includes a switch 151 which is adapted to be closed upon receipt of a predetermined value of coin. When the coin box switch 151 is closed the output therefrom energizes one set of terminals of two parallel push-to-close switches S-1 and S-4. Switch S-1 is disposed to be closed by the placement of the firing arm 124 in the "fire" position. In this position switch S-1 energizes both a "ready" light 152 indicating that the cannon C is ready to be fired and the contactor of a series-connected switch S-3. Switch S-3 is operatively connected to be closed by the actuation of trigger 122 to energize a coil 153 which pulls in the armature of air valve 108 thereby suddenly discharging the compressed air within accumulator 128. This charge of compressed air travels forwardly through air line 106 to loader 142. At this time swivel block 88 is disposed in its "fire" position of FIGS. 6 and 8. Accordingly, the ice cube 11 b disposed within cup 92 will be shot forwardly through actual barrel 84 along trajectory 15 towards target 14.
Also connected from the output of switch S-3 is the solenoid coil 154 of aforedescribed master control cylinder 134, which controls the operation of the aforedescribed slave cylinder 96. When energized through coil 154 the master control cylinder 134 rotates loader arm 94 and hence swivel block 88 to its "load" position of FIGS. 7 and 9. Upon reaching such "load" position, loader arm 94 depresses push-to-close switch S-4 also connected to outlet of coin box 150 which in turn energizes a coil 156 of a switching relay 157 to initiate a count in a conventional timer 159. At the completion of the count of timer 159 a firing coil of the master control cylinder 134 is energized to activate the loader arm 94 and hence swivel block 88 to its "fire" position of FIGS. 6 and 8. When the swivel block 88 has been disposed in proper "fire" position, loader arm 94 closes switch S-1 as described hereinabove.
Also connected to the output of switching relay 157 is a shuttle control coil 160 disposed to activate a master control cylinder 161 that controls the operation of aforedescribed cylinder and plunger unit 56 to thereby drive the shuttle block 53 from its solid outline position of FIG. 4 to its dotted outline position thereof whereby cavity 52 will be aligned with aperture 58. The ice cube 11 a shown in FIG. 4 will then be driven through delivery line 12 towards the loader 72. At the completion of the delay provided by timer 159 a return coil 162 on master cylinder 161 is energized so as to return shuttle block 53 to its solid outline position of FIG. 4 wherein another ice cube may fall into the cavity 52. The output signal of timer 159 also energizes a coil 170 on control valve 155 to move loading arm 94 and hence swivel block 88 to the "fire" position of FIGS. 6 and 8.
Timer 159 may be any conventional timer selectively set to provide a time delay that allows sufficient time for an ice cube to progress from shuttle block housing 54 to loader 72. Timer 159 may further include a conventional counter (not shown) which at the completion of a predetermined count of timing cycles disables the control system. In this manner a user of the cannon C will be provided with a plurality of shots for the coins dropped into coin box 150.
The invention has been described with reference to the presently preferred and illustrated mode of practice thereof. It is not intended that the invention be limited by the illustrated and preferred embodiment. Instead, it is intended that the invention be defined by the means and their obvious equivalents set forth in the following claims.