Abstract:
A multi-store launch container is disclosed wherein a plurality of stores,aintained in a tandem configuration therein, can be sequentially ejected. The container is normally carried by a vehicle and receives the necessary charges, of for instance pressurized gas, at its breach end. A spring-biased cocking mechanism forces open a first port cover and maintains a second port cover in the closed position. After the first charge is fired, the cocking mechanism allows the port covers to pivot and the first port is now tightly shut and the second port open for the next charge.

Description:
STATEMENT OF GOVERNMENT INTEREST 
     The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor. 
    
    
     BACKGROUND OF THE INVENTION 
     The present invention discloses a fluid-actuated, multi-store dispenser wherein a spring-biased mechanical linkage causes sequential launching of stores from their tandem position inside a launch container. In some environments, it is desirable to dispense multiple stores from a launch vehicle, for instance sonobuoys, in dense patterns. Due to physical limitations of space in the dispensing vehicle, an effort was made to miniaturize the active components inside the store and therefore reduce the overall outer dimensions thereof. Once the size of the store was reduced, in order to meet the demands of the denser patterns, the inside of the individual launch containers were modified to allow each to hold and dispense more than one store. Any new type of launch container, in addition to maintaining the size requirement dictated by the transporting vehicle, must be operated by the vehicle&#39;s pneumatic gas and electrical systems. 
     SUMMARY OF THE INVENTION 
     It is therefore an object of the present invention to develop an internal mechanism that will allow the carriage and dispensing of a plurality of stores from within a single launch container. 
     It is a further object of the invention to develop such an internal mechanism that can easily be retrofitted into the existing inventory of launch containers. 
     It is a still further object of the present invention to develop an internal mechanism that will permit the carriage and dispensing of a plurality of stores from within a single container without interfering with the safety o the reliability of either the dispensing vehicle or the container. 
     It is a still further object of the present invention to develop such a internal mechanism that will be relatively simple to manufacture, install and maintain. 
     These and other objects of the invention are accomplished by a tubular store launch container, that is installed in a vehicle to receive a fluid charge into its breech end, that contains a biased mechanical linkage, two fluid ports for directing the fluid charge and a twin-seated valve cover that alternatingly opens for one port and then the other. The stores are loaded into the container in tandem positions and the inner end of the last to be loaded forces against the bottom part of spring-loaded cocking mechanism. The store is temporarily sealed into the container to cause the upper end of the cocking mechanism to sit inside a channel and force one half of a spring-biased flapper valve away from a first port and the second half over the second port. At a predetermined signal, a first charge of gas flows into the first port, down the channel and impacts against the inner end of the last-loaded store. The pressure forces the store out of the container thereby removing the resistance to the flapper valve. The first half of the valve is spring-force closed over the first port, allowing the second half to open up the second port. Whenever the vehicle is ready to dispense the second store, a second charge will now flow against the inner surface thereof to force it from the container. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 shows a cross-sectional elevation view of a launch container, modified by the instant invention, with two stores contained therein and after a first charge has been fired; 
     FIG. 2 shows a cross-sectional view, taken along lines II--II of FIG. 1, showing a view of the upper, inside of the breach end of the launch container when the flapper valve assembly has been removed; 
     FIG. 3 shows an isolated and enlarged view of the flapper valve shown in FIG. 1; 
     FIG. 4 shows a plan view of the flapper valve shown in FIG. 3; 
     FIG. 5 shows an enlarged and isolated elevation view of the action mechanism of FIG. 1; 
     FIG. 6 shows a cross-sectional elevation view, similar to FIG. 1, after one store has been ejected and depicting a second charge (shown by the dashed arrow) firing the innermost store; and 
     FIG. 7 shows a view similar to FIG. 6 depicting the resulting empty launch container after all stores have been ejected. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to the drawings wherein like characters designate like or corresponding parts throughout the several views, there is shown in FIG. 1, a cross-sectional elevation view of a standard-size launch container 20, connected into the transporting vehicle (not shown in FIG. 1), with two stores 22a, 22b contained therein and after a first fluid charge (denoted by the fluid flow dashed arrows) has been fired, as for instance from a multi-charge cartridge-activated device (CAD) (shown in phantom). The charge can be either a pneumatic gas charge, such as is detailed in U.S. Pat. No. 4,444,085  which is incorporated herein by reference, or an explosive charge from what is commonly called a cartridge-activated-device, or CAD, as is known in the art. Launch container 20 is connected to the transport vehicle at its breach end 24 by locking lugs 26a, 26b being inserted into receptacles (not shown) in the vehicle, as is known, to thereby leave its discharge end 28 open to the environment. Launch container 20 can be made from molded ABS plastic or aluminum sheet, formed into a tubular sleeve of predetermined diameter and length, with the components at the breach end, as will be more fully described below, being made from molded plastic or other suitable materials. FIG. 2 shows a sectional view of launch container 20 taken along lines II--II of FIG. 1, showing container 20 with the breach end cap 21 removed. 
     A plenum chamber 32 to receive fluid charges, in the form of a cup, with a fluid charge aperture 34 through the central portion of the bottom 35, is affixed inside the breach end 24 of cap 21, as by one or more fasteners 37. The charge supplying mechanism (such as, for instance, a CAD, as shown in phantom) can be conveniently attached thereto, as by mating threads therefrom to the threads 36 on the inner surface of the chamber walls. Fasteners 37, for instance a bolt and nut combination shown in FIG. 1, fix the side tab 39 of chamber 32 to cap 21 and to charge collection chamber housing 42. Chamber housing 42 is rigidly secured, near the breach end, to the inside of container 20, as shown, and consists of a centrally located alignment disc 43, a radially-located securing section to capture fastener 37 and the port section 44, also located along the circumference of container 20. Alignment disc 43, by its proximal surface, provides the resistance necessary to divert the charges, and by the ring 46 on its distil surface, provides a charge-deflecting guide to properly direct the charge around the outer perimeter of the innermost store to bring the firing force to bear evenly on the store as it is discharged from container 20. Each store 22b, 22a is inserted inside container 20 so that its upper rim 23b, 23c, respectively, forms a hermetic seal, to be broken only when sufficient charge pressure accumulates, between the inner surface of the walls of container 20 and the rim. If desired, a disc of foam padding can be inserted atop each store (not shown) to prevent damage to the top surface thereof while the store is being carried in container 20. Charge collection chamber 45, situated immediately below plenum chamber 32, collects and diverts the charge to different ports, such as port A or port B, as will be described. 
     Two of the key components of the present invention are the flapper valve assembly 50 and the action mechanism 80, both shown in FIG. 1 in their initial positions and (in phantom) in their reaction positions. Flapper valve assembly 50 is comprised of spring-loaded flapper valve 52, as shown in enlarged isolated and plan views in FIGS. 3 and 4, and the housing 60 for twin ports A and B, shown more clearly in FIG. 2. Valve 52 is comprised of a formerly flat, rectangular section of material that has two rounded corners 55a, 55b such that, on the one half 54, their contour conforms to the semiovular shape of the outer periphery of port A and on the opposite half 58, the squared-off corners cover the entire area of the opening of port B. Half 54 of the section is angled to approximately thirty degrees from the horizontal, thus forming an axis of oscillation at approximately midway between opposing edges, so that when valve 52 is set onto the island 58 between ports A and B, either one or the other, but not both, halves will seal off either port A or B as valve 52 is rocked back and forth, as will be explained. A pair of tubular members 60a, 60b are fixed along the axis and a pair of negator springs 63a, 63b positioned thereon by a bar 61 placed through the tubular pivots. Valve 52 is set over ports A and B with connecting hook 64 forced against the inner wall of cap 21, as shown, so that spring extensions 65a, 65b force half 54 to sealingly cover port A and leave an opening to port B. 
     Action mechanism 80, as more clearly seen in the isolated view of FIG. 5, is set into the narrow, radially-extending cavity directly under port A for a substantial length along container 20. Once mechanism 80 is set in place, a cavity cover 82 (shown partially cut-away in FIG. 5) is securely fastened to the container making the cavity airtight. Mechanism 80 consists of a two-piece flexible cable 84a, 84b, that acts as a force transferring means, as will be explained, and is joined at a midpoint by a coiled spring 86, and inserted substantially inside a tube 88, which tube is permanently fixed to its location in the cavity. Spring 86 is fixed to upper and lower sections 84a, 84b, respectively, by circular clamps 89a, 89b, as is known. The end section of tube 88 nearest the breach end of container 20 is bent slightly, at an angle of approximately forty-five degrees, to be positioned from the cavity inside cap 21. The distil end of cable 84b is fashioned into an elongated &#34;S&#34;-shaped probe 92, or sensing means, that is inserted through a slot 93 at a predetermined location in the container sidewall. As will be explained, when store 22a is loaded into container 20, probe 92 is caught by rim 23a and inward loading force exerted on store 22a moves probe 92, and cable 84, toward the breach end. 
     The action and reaction of the multi-store launch container can be more easily understood with reference to FIG. 1, 6 and 7. Launch container 20 is loaded with first store 22b and then store 22a. As probe 92 impacts upon rim 23a, it is forced toward the breach end of container 20 and that reaction moves it to a cocked position, as seen in solid line detail in FIGS. 1 and 5. Cable 84b, being rigidly connected to probe 92 and restricted in its lateral range of movement by tube 88, will, in turn, advance toward the breach end, thereby compressing spring 86 until the end of cable 84b contacts the end of cable 84a. Further movement of probe 92, and cable 84b, will now start moving cable 84a, which is also constrained in any lateral direction by tube 88, and which, in turn, now forces plunger 94 out of tube 88 against section half 54. The proximal end of tube 88 lies in a plane a very small, predetermined, distance, inside port A, below the completely closed plane created by section half 54 when valve 52 is first installed. The remaining movement of probe 92, cable halves 84b, 84a and plunger 94 forces section half 54 into the fully cocked position (as seen in FIG. 1) and forces section half 58 down, through the pivotal movement at bar 61, over port B. Port A is open to any fluid, such as compressed gas, charge and port B is completely closed. 
     When the first charge (as depicted by the dashed arrows) enters plenum chamber 32 and then colllection chamber 45, it is free to only proceed into the space immediately above section half 54 and, then, through port A and down the cavity. The charge will be forced through aperture 93 and around the perimeter of store 22a. The pressure from the charge will build until it is sufficient to overcome shear tabs (not shown) that are holding store 22a inside container 20. Store 22a will leave container 20 (as shown by the arrows at the lower end thereof depicting movement), and the force exerted by rim 23a against probe 92 will be removed. Now the stored u spring force in spring 86 will cause cable 84a to expand, thereby relieving the force against the end of cable 84b. This, in turn, will allow the upper end of cable 84b, and plunger 94, to be moved by the force generated by the overpowering spring force from spring extensions 65a,b against section half 54. The force from negator spring 63a,b will overcome the resistance of mechanism 80 and force section half 54 to completely close and seal port A, thereby completely opening port B, as seen in FIG. 6. As a design preference, port B can be made a predetermined amount larger in volume than port A. Now that port B is open, and port A is closed, a subsequent charge (as seen by the dashed arrows in FIG. 6) will flow through plenum chamber 32, into chamber 45 and out through port B. This charge will be diverted, once it reaches the inner surface of store 22b, by ring 46 to flow over the surface of the perimeter of store 22b. Once sufficient pressure, to overcome shear tabs (not shown) constraining store 22b inside container 20, builds up, the tabs will be broken and store 22b will be ejected. The empty launch container 20 is shown in FIG. 7. 
     Obviously, other embodiments and modifications of the present invention will readily come to those of ordinary skill in the art having the benefit of the teachings presented in the foregoing description and drawings. It is therefore to be understood that various changes in the details, materials, steps, and arrangements of parts, which have been described and illustrated to explain the nature of the invention, may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims.