Abstract:
A miniature spacecraft is constructed using modular features so as to provide a wide range of possible sizes with a choice of physical attributes. Radially directed bays are arranged around a central cylindrical element which may be used for storing a propulsion tank or canister. Octagonal or other configurations provide rigidity and strength through the use of triangular planetary cylinders which form outwardly facing bays for storage.

Description:
[0001]    This application claims the filing date of a previously filed provisional patent application having serial No. 60/106,340 and an assigned filing date of Oct. 30, 1998 as well as Disclosure Documents having Ser. Nos. 442,563, 448,685, 448,677 and 448,678 having filing dates of Jul. 23, 1998, Dec. 15, 1998, Dec. 15, 1998 and Dec. 15, 1998 respectively, which applications and disclosures containing subject matter substantially the same as that described and claimed in the present application. 
     
    
     
       BACKGROUND OF THE INVENTION  
         [0002]    1. Field of the Invention  
           [0003]    This invention relates generally to aircraft and particularly to craft designed for operation in a low gravity environment such as space craft, and more particularly to a miniature space craft of specific modular construction adapted for structural expansion for a variety of applications.  
           [0004]    1. Description of Related Art  
           [0005]    The following art defines the present state of this field:  
           [0006]    Devlin, U.S. Pat. No. 3,709,447 describes a satellite apparatus whereby a plurality of experiments may be monitored in a single satellite for a plurality of different organizations. The satellite has modular casings for placement on a frame and adapted to place experimental components therein with instrumentation facing a centrally located scanner which transmits data on the experiments to a receiving station.  
           [0007]    Perkins et al., U.S. Pat. No. 5,271,582 describes multiple subsidiary small payloads connected to standard mechanical and electrical interfaces provided by an expendable or recoverable modular mother satellite bus (MMSB) and launched into space as an assembly acting as a common carrier providing low unit launch costs for the attached subsidiary payloads and also providing a variety of electrical, pointing, and thermal control services for these payloads after reaching orbit. These services include but are not necessarily limited to controlled separation of free-flying satellites or re-entry vehicles, regulated electric power at a variety of voltages, telemetry, computer control, payload control via time delayed pre-programmed instructions, optional real-time payload control via direct radio communication or transmission through geostationary or other communication satellite links, time-driven or event-driven control logic, mass data memory, encryption and decryption of data and commands, payload pointing augmented heat rejection, and interconnection between subsidiary attached payloads through the data bus.  
           [0008]    Anderson, U.S. Pat. No. 3,596,853 describes a space capsule including heat source devices individually recoverable in which each heat source device includes a combined pyramidal-type reentry body and heat reflector and a radioisotopic heat source disposed in a hollow or concave portion of the body.  
           [0009]    Cappa et al., U.S. Pat. No. 5,848,767 describes a single piece frame for a spacecraft, the frame manufactured as fiber composite sheets overlay a core. The core is preferably made of aluminum and formed with a honeycomb cross-section. The frame provides a mounting structure to which payload, spacecraft equipment, and boost vehicle are attached. The frame can be reinforced locally by varying the core density or the wall thickness so as to resist concentrated or localized loads. The orientation of the fiber in the composite sheets may also be varied so as to so as to strengthen the frame in a desired location.  
           [0010]    Esch et al., U.S. Pat. No. 3,258,225 describes a satellite structure comprising, a frame comprising a plurality of frame sections, side panels carried by the frame and supported in said frame sections, a top panel closing the upper end of the frame, a bottom panel closing the lower end of the frame and having a central opening, a metallic base plate closing the opening, and satellite instrumentation supporting means mounted on the base plate and having its upper end secured to the top panel.  
           [0011]    Chatelain, U.S. Pat. No. 3,153,235 describes a reflector antenna having a hollow, expansible polyhedral body consisting of a plurality of inwardly extending recesses.  
           [0012]    Kamm, U.S. Pat. No. 3,168,263 describes a satellite vehicle orientation device comprising a satellite vehicle, a rigid, elongated tubular member having one end fastened to said satellite vehicle, a reel for storing said tubular member and means for deploying said tubular member.  
           [0013]    The prior art teaches various spacecraft construction schemes. However, the prior art does not teach that a miniature spacecraft may be constructed with a central cylindrical bay having radially oriented triangular bays for forming open bay areas facing outwardly. The present invention fulfills these needs and provides further related advantages as described in the following summary.  
         SUMMARY OF THE INVENTION  
         [0014]    The present invention teaches certain benefits in construction and use which give rise to the objectives described below.  
           [0015]    The present invention provides a miniature spacecraft constructed using modular features so as to provide a wide range of possible sizes with a choice of physical attributes. Radially directed bays are arranged around a central cylindrical element which may be used for storing a propulsion tank or canister. Octagonal or other configurations provide rigidity and strength through the use of triangular planetary cylinders forming outwardly facing bays for storage.  
           [0016]    A primary objective of the present invention is to provide a miniature spacecraft having advantages not taught by the prior art.  
           [0017]    Another objective is to provide such a craft having octagonal symmetry for strength and adaptability.  
           [0018]    A further objective is to provide such a craft having radial constructional features for strength.  
           [0019]    A still further objective is to provide such a craft having triangular wall structures for rigidity.  
           [0020]    A yet further objective is to provide such a craft having a central cylindrical bay capable of storing a payload such as a propulsion canister.  
           [0021]    Other features and advantages of the present invention will become apparent from the following more detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWING  
       [0022]    The accompanying drawings illustrate the present invention. In such drawings:  
         [0023]    [0023]FIG. 1 is an exploded perspective view of the preferred embodiment of the present invention; and  
         [0024]    [0024]FIG. 2 is a perspective view thereof showing the invention as assembled. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0025]    The above described drawing figures illustrate the invention, a miniature spacecraft apparatus  10  comprising a rigid structural and symmetrical body portion  20  including plural walls  30  arranged to form an open central cylindrical wall enclosure  40 . The preferable materials used in the present invention are high strength composite sheet stock. Appended to, and extending radially outwardly from the central cylindrical wall enclosure  40  are a plurality of spaced apart planetary cylindrical wall enclosures  50  best seen in FIG. 1. The planetary cylindrical wall enclosures  50  are arranged for defining generally rectangular volumes  55  therebetween, the rectangular volumes  55  being positioned for access from at least four opposing sides of the apparatus  10  as shown in FIGS. 1 and 2. A top  60  and a bottom  70  plates are engaged with the body portion  20  and the planetary wall enclosures  50  in positions for enclosing the central cylindrical wall enclosure  40  and the planetary cylindrical wall enclosures  50 . The plates  60 ,  70  provide partial enclosure also to the rectangular volumes  55  such that these volumes are accessible only from the apparatus&#39; periphery as can best be seen in FIG. 2. Bonding agents are used to fasten the various elements of the invention to one another in a permanently attached fashion. A cylindrical storage pod  80  is positioned within the central cylindrical wall enclosure  40 , the storage pod  80  providing a means for lateral structural reinforcement  82 ; the three flanges shown in FIG. 1, such that forces applied to the storage pod  80  are transferred through the lateral reinforcement means  82  to the cylindrical wall enclosure  40 . A closed cylindrical storage vessel  90  is enclosed within the storage pod  90  by the top and bottom plates  60 ,  70  the storage vessel  90  providing a fluid valving means  95  extending outwardly from a pass-through means  100  in at least one of the plates  60 ,  70  as shown. The fluid valving means  95  shown is only one possible propulsion device useful in conjunction with the present space craft and is intended to show how such a means may be enabled. The capping device  110  illustrates a means for structurally supporting the valving means  95 .  
         [0026]    The planetary cylindrical wall enclosures  50  each inventively comprise a triangular arrangement of structural wall sections  52  providing a highly rigid structure. The storage pod  80  comprises a circular wall element  81  integral with the plurality of lateral reinforcement means  82  which extend radially outwardly therefrom. The top and bottom plates  60 ,  70  and the planetary cylindrical wall enclosures  50  are of such conformation as to establish the apparatus preferably with eight sides of equal length and arranged symmetrically about a longitudinal axis  56  of the apparatus  10 . The top and bottom plates  60 ,  70  and the planetary cylindrical wall enclosures  50  may alternately be of such conformation as to establish the apparatus  10  with a circular exterior shape or a polygon configuration other than an octagon. Clearly, the apparatus may be constructed in alternate perspective, i.e., with a smaller or larger relative height dimension. Also, the instant basic construction lends itself to a modular adaptation, so that, for instance, two of body portion  20  may be used to erect a space craft of twice the height shown in FIG. 2. Such a craft would utilize two of storage pod  80  as well and a storage vessel  90  with approximately twice the length as the vessel shown in FIG. 1.  
         [0027]    Because of its basic and modular construction, the spacecraft of the present invention may be used for a very wide range of applications. The volumes  55  (storage bays) may be used for equipment or general storage and the other interior spaces may be utilized for necessary equipment and systems for enabling useful spacecraft functions. In such utilization a method is herein defined for equipping the spacecraft with operational components, said method including: providing the instant spacecraft with its centrally located equipment bay surrounded by the plurality of radially oriented equipment bays, through placement, interconnection or other accommodation, both mechanical and electrical, and by any of the well known prior art interconnection means and techniques: a modular electrical power package, a modular propulsion package, a modular communications package, a modular sensory and monitoring package, a modular deployable vehicle package and a modular attitude control package, each of the foregoing in at least one of the equipment bays. It should be noted that these items are listed here for reference purposes only and do not constitute an exhaustive or comprehensive list of such items. The items are also, of any of the well known types so that further details of construction, function or interconnectivity ae not herein provided. The method further provides for fastening the top and bottom plates to the body portion by a plurality of removable fasteners so as to enable replacement of the plates with alternative spacecraft equipments such as space sails, solar panels, antennas and other related exterior spacecraft systems.  
         [0028]    While the invention has been described with reference to at least one preferred embodiment, it is to be clearly understood by those skilled in the art that the invention is not limited thereto. Rather, the scope of the invention is to be interpreted only in conjunction with the appended claims.