Abstract:
Exemplary embodiments are directed to tool bit holders that generally include a tool bit cartridge defined by side walls located opposite and facing away from each other, and at least one end wall that defines a curved, angled or staggered geometry. The exemplary tool bit holders generally include a pivot point located on the side walls of the tool bit cartridge. The tool bit cartridge includes tool bit storage holes in the at least one end wall. The tool bit cartridge generally rotates about the pivot point within a cavity of a device.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application is a continuation application that claims the benefit of a co-pending, non-provisional patent application entitled “High Density Tool and Locking Mechanism,” which was filed on Jun. 8, 2010, as Ser. No. 12/796,262, which claims priority benefit to three (3) provisional patent applications, as follows: (i) a first provisional application entitled “Split Tools,” which was filed on Jun. 9, 2009, as Ser. No. 61/268,135; (ii) a second provisional application entitled “Split Tools,” which was filed on Sep. 11, 2009, as Ser. No. 61/276,376; and (iii) a third provisional application entitled “High Density Tool and Locking System,” which was filed on Apr. 12, 2010, as Ser. No. 61/342,375. The entire content of the foregoing applications is incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    This invention relates to better methods of producing hand tools that store and make readily accessible a greater quantity of tools to perform a given task. The noted objectives are realized by unique techniques of tool storage and retrieval from within the space provided in the handles of both manual hand tools and power hand tools. 
       BACKGROUND OF THE INVENTION 
       [0003]    Hand toolkits consisting of folding elongated tools and hand toolkits comprised of a handle with a driver shaft that accept interchangeable tool bits have long benefited tradesmen, hobbyist and homeowners alike. These toolkits generally include a plurality of related tools arranged in an assortment of sizes for a given tool type, such as screwdrivers, hex wrenches and Torx drivers, or arranged as a variety of tools each with different functions that might be used to perform a given undertaking, such as sets of common tools for repairing a bicycle or tools commonly used by fishermen. It is conceivable that manual or power hand toolkits of this nature can be produced to benefit any conceivable sport, hobby or trade. 
         [0004]    Although tradesmen, hobbyists and homeowners are benefited with the convenience of an organized set of tools situated in a common holder to perform the task at hand, often they have had to depend on the relatively small assortment of tools contained in a toolkit before accessing additional tools to finish a task from a separate toolbox or storage device. An example might be that to perform a given task, the user may not know by visual inspection if a metric or fractional-inch (SAE) hex wrench is needed or might require a set of both metric and SAE hex wrenches and would presently have to rely on two separate toolkits. 
         [0005]    Thus, a need exists for improved toolkits and systems that better meet the needs of tradesmen, hobbyists and/or homeowners. Such needs are satisfied according to the present disclosure through advantageous toolkits and systems. Thus, in exemplary embodiments, the present disclosure provides toolkits/systems that are able to accommodate both a full set of common metric and SAE hex wrenches in one toolkit. Additional advantages of this invention include mechanisms for retaining stored tools in location for storage, selection and use using either semi-secure or positive locking mechanisms. Additional advantageous features, functions and benefits of the present invention will be apparent from the description which follows, particularly when read in conjunction with the accompanying figures. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention is generally directed to a hand tool/system that includes a handle with access from one or more sides to provide tool storage and retrieval. The hand tool/system also generally includes one or more multi-chambered tool bit cartridges that are either fixed or pivoting for tool storage and one or more tool drivers that are either fixed or pivoting. In addition, semi-secure and/or positive engagement locking mechanisms can be applied to the design of the multi-chambered tool bit cartridge and/or tool driver depending upon the design specifications and/or desired functional operation of implementations hereof. 
         [0007]    The object of this invention pertains to optimizing the greatest quantity of fastener tool bits and extended folding tools that can be stored and carried in an organized fashion within the confines of a standard size tool handle, including features that allow greater flexibility in how they are used. The purpose of which is to provide the user of a given hand tool, regardless if it&#39;s a manual hand tool or a power hand tool, the means to perform a given task right in the palm of his/her hand, minimizing the need to retrieve additional similar tools or tool bits from a separate storage device. A standard size tool handle is defined as what has been found through decades of hand tool design to be a comfortable size that fits in the average size hand of a tradesman or do-it-yourselfer. 
         [0008]    To achieve this stated objective, it is important to define the type or function, size range, access and arrangement of the tool bits or extended tools that can be comfortably accommodated within the confines of a tool handle. In that tool bits such as ¼ inch hex bit that has a function as a slotted, Phillips, hex, Torx, square or posi driver bit offer overall geometric dimensions that are relatively uniform in size for a given length, ¼ inch hex bits that function as nut drivers as well as sockets range considerably in the overall diameter in comparison to the size of the drive connection as well as from one another as they relate to the size of the specific fastener they are used for. For these reason different approaches to the design of multi-chambered tool bit cartridge has to be considered. Both fixed and pivoting multi-chambered tool bit cartridges are required to achieve an appropriate solution and to accomplish the stated object of this invention. Additionally, a feature that makes possible multiple size tool bit drivers to accommodate multiple size tool bit drive connections in the same size hand tool assembly without consuming additional space will equally apply to extended folding tools and therefore is also included as a solution to the stated objective of this invention. 
         [0009]    To accumulate and access the maximum quantity of fastener tools it is important to first design a storage device that will keep each fastener tool in close proximity to each other as well as aligning each tool along the common geometric consistencies that exist between each tool in a X, Y, Z matrix that exploits these consistencies. Second it is important to provide access great enough to be able to pluck a given tool from the storage device given the limitations imposed in selecting and securely grasping a relatively small object. Thirdly, assuming that there is sufficient room within the confines of the hand tool handle, access to a second matrix on the reverse side of the storage device provides for the accumulation of additional fastener tools. Fourthly, considerations for strengthening a tool handle that has a large open portion in its center to accommodate a multi-chambered tool bit cartridge. Complying to the parameters of these four imposed design conditions and to accommodate the greatest selection of fastener tools the storage device must provide tool retrieval and storage in a three dimensional matrix of multiple columns and rows located on selective planes and that provides access from one or more sides. Additionally, depending upon the swing radius imposed by the geometry of the tools also influences the geometry of the tool holder; the tool holder can be of a flat design fixed within the tool handle or of a pivoting design that rotates from a secure home position for storage to an open and exposed position for selection. 
         [0010]    The various objectives and advantages described in this summary of this present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    To assist those of ordinary skill in the art in making and using the disclosed toolkits/systems, reference is made to the accompanying figures, wherein: 
           [0012]      FIG. 1  Depicts a folding toolkit with a multi-chambered tool bit cartridge and tool driver in an extended and open position. 
           [0013]      FIG. 2  Depicts a folding toolkit with a multi-chambered tool bit cartridge and tool driver in a retracted and closed position. 
           [0014]      FIG. 3  An exploded view shows the same toolkit as in  FIG. 1  and  FIG. 2 . 
           [0015]      FIG. 4  A similar exploded view to that of  FIG. 3  with similar features except with differences with semi-secure positioning approaches between  FIG. 3  and  FIG. 4  for the multi-chambered tool bit cartridge and tool driver 
           [0016]      FIG. 5  An exploded view of a folding toolkit with a multi-chambered tool bit cartridge and tool driver but of a simple design. 
           [0017]      FIG. 6  This hand tool is similar in design to that shown in  FIG. 1  displaying in phantom view example of multiple positions that the multi-chambered tool bit cartridge and tool bit driver can pivot. 
           [0018]      FIG. 7  A top view and sectional view of a hand tool component swing radiuses and similar in design to that shown in  FIG. 2 . 
           [0019]      FIG. 8  Depicts a folding toolkit with a multi-chambered tool bit cartridge in a retracted and closed position and fixed (non-rotating) tool driver. 
           [0020]      FIG. 9  Depicts a folding toolkit with more than one multi-chambered tool bit cartridge and one tool driver in various positions. 
           [0021]      FIG. 10  Multiple views of a multi-chambered tool bit cartridge that allows for tool bits to be inserted from two sides of the cartridge. 
           [0022]      FIG. 11  Multiple views of a multi-chambered tool bit cartridge that allows for different size tool bits to be inserted from two sides of the cartridge. Also shown is an off-center axis of rotation. 
           [0023]      FIG. 12  Multiple views of a multi-chambered tool bit cartridge that allows for long tool bits to be inserted from two sides of the cartridge in a staggered arrangement. 
           [0024]      FIG. 13  Multiple views of a multi-chambered tool bit cartridge that allows for long tool bits to be inserted from one side of the cartridge as well as an external axis. 
           [0025]      FIG. 14  Multiple views of a multi-chambered tool bit cartridge that allows for short tool bits to be inserted from one side of the cartridge. Also shown is an off-center axis of rotation. 
           [0026]      FIG. 15  Multiple views of a multi-chambered tool bit cartridge that allows for tool bits to be inserted from two sides of the cartridge and an elastomeric over-mold clad to each chambered face of the cartridge. 
           [0027]      FIG. 16  Multiple views of several multi-chambered tool bit cartridge ganged together that allows for tool bits to be inserted from two sides of the cartridge. 
           [0028]      FIG. 17  Multiple views of a single-chambered side wall tool cartridge. 
           [0029]      FIG. 18  Multiple views of multi-chambered tool bit cartridge with tool bit chambers perpendicular to the cartridge axis of rotation. 
           [0030]      FIG. 19  Multiple views of multi-chambered tool bit cartridge that is parallel mounted in relation to the handle. 
           [0031]      FIG. 20  Multiple views of a multi-chambered tool bit cartridge that allows for tool bits of different sizes to be inserted from each side of the cartridge. 
           [0032]      FIG. 21  Multiple views of split tool bit holders that function in conjunction with the multi-chambered tool bit cartridge shown in  FIG. 20 . 
           [0033]      FIG. 22  Multiple views of extended tools in a similar arrangement to  FIG. 21 . 
           [0034]      FIG. 23  Multiple views of extended tools with spacer in a similar arrangement to  FIG. 21  and  FIG. 22 . 
           [0035]      FIG. 24  Depicts a folding toolkit with a multi-chambered tool bit cartridge in a retracted and closed position and with a ratchet bit driver. 
           [0036]      FIG. 25  This exploded view shows the same toolkit as in  FIG. 24  and is equipped with a multi-chambered tool bit cartridge and ratcheting bit driver with a positive locking mechanism along with a split handle. 
           [0037]      FIG. 26  An exploded view shows the same toolkit as in  FIG. 24  and  FIG. 25  but with a non-ratcheting bit driver. 
           [0038]      FIG. 27  A similar exploded view to  FIG. 26  with similar features except there are two bit drivers as shown in  FIG. 21 , one each to accommodate two different size tool bits that would fit in the multi-chambered tool bit cartridge shown in  FIG. 20 . 
           [0039]      FIG. 28  A sectional view of the positive locking mechanism with two bit holders in a locked position. 
           [0040]      FIG. 29  A sectional view of the positive locking mechanism with two bit holders in a unlocked position. 
           [0041]      FIG. 30  Multiple views of a non-positional multi-chambered tool bit cartridge that allows for storing tool bits in a cartridge that has a radius to great to rotate. 
           [0042]      FIG. 31  Depicts a folding toolkit multi-chambered tool bit cartridge as shown in  FIG. 30  and tool driver in an extended and open position. 
           [0043]      FIG. 32  Depicts a folding toolkit multi-chambered tool bit cartridge as shown in  FIG. 30  and tool driver in a retracted and closed position. 
           [0044]      FIG. 33  An exploded view shows this hand tool is equipped with a multi-chambered tool bit cartridge as shown in 
           [0045]      FIGS. 30 and 31  and bit driver along with a split handle. 
           [0046]      FIG. 34  Depicts a multi-chambered tool bit cartridge located in the handle of a power hand tool and shown in several positions. 
       
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0047]    According to an exemplary embodiment of the present disclosure,  FIG. 1  is an isometric view of a hand toolkit instrument which embodies a positional multi-chambered tool bit cartridge  12  in its open position for tool bit selection and a positional tool bit driver  13  in an open position for use. The handle sections  10  and  11  are shown to be held together with fastener components  14  and  15  although other means of joining the handle sections such as sonic welding or rivets could be employed. In some instances the handle could be a single component rather than two halves. An assortment of tool bits  17  and  18  are arranged on two ends of the multi-chambered tool bit cartridge  12  and fully exposed for selection. A tool bit  16  has been selected and inserted into a mating chamber  58  located in tool bit driver  13  for use. 
         [0048]      FIG. 2  is the same hand toolkit instrument as in  FIG. 1 , an isometric view which embodies a positional multi-chambered tool bit cartridge  12  in its closed or home position the tool bit driver  13  in a closed or home position and contained within the handle sections  10  and  11 . 
         [0049]      FIG. 3  is an exploded isometric view that illustrates assembly and positioning features of the present invention more clearly. The multi-chambered tool bit cartridge  12  revolves around a tubular shaped axle sleeve  22  shown here to be in two sections and attached to handle sections  10  and  11  although other manifestations of axle  22  can produce its same primary functions. In this view axle sleeve  22  has the functions of being the pivot point  21  for the multi-chambered tool bit cartridge  12 , provide a pathway  23  to connect fastener components  14  and  20  to hold the handle sections  10  and  11  together and to perform the function of being a spacer that will prevent handle sections  10  and  11  from being compressed and thus rub against the multi-chambered tool bit cartridge  12  and restrict free rotation of the tool bit cartridge and assist in transferring torsion forces when applied during use more uniformly between both halves of the handle sections  10  and  11 . Hole feature  30  mates with stem feature  29  to add additional strength. A small clearance gap between the inner walls  24  of handle section  10  and  11  should be maintained to allow free rotation and effective positioning of the multi-chambered tool bit cartridge  12 . Located in the side walls of the multi-chambered tool bit cartridge  12  are hole provisions  31  that accommodate plugs  32 , similarly hole provisions  33  are located in the inner walls  24  of the handle sections  10  and  11  that accommodate plugs  34 . 
         [0050]    The plugs located in both the handle sections and the tool bit cartridge are situated along equal circumscribed circumferences and can be situated on both sides of the tool bit cartridge and handles or one side of the tool bit cartridge and the same side of the handle that the one side flanks. There are two arrangements that the plugs  32  and  34  can comply with that will produce semi-secure positioning arraignments for the multi-chambered tool bit cartridge  12 . First, both plugs  32  and  34  can be magnets with opposing magnetic fields attracting one another to a selected semi-secure position. Second either plug  32  or plug  34  can be magnets with the other being of a ferromagnetic material to attract the magnet. As a minimum, only one plug  32  or  34  located in the cartridge or handles is required to be a magnet while the quantity and angular placement of opposing magnets or ferromagnetic plugs located in the side walls of the flanking components along the circumscribed circumferences will determine the number and location of semi-secure positions for the multi-chambered tool bit cartridge  12 . The same is true for the tool bit driver portion of the hand toolkit instrument. Where plugs  35  are situated in hole provisions  36  of the inside wall  9  of handle sections  10  and  11  and plugs  37  located in hole provisions  38  of the tool bit driver  13 . Additionally, the tool bit driver  13  revolves around axle  28  shown here to be in two sections and attached to handle sections  10  and  11  although other manifestations of axle sleeve  28  can produce its primary functions. In this view axle sleeve  28  has the functions of being the pivot point  39  for the tool bit driver  13 , provide a pathway  26  to connect fastener components  15  and  20  and to perform the function of being a spacer that will prevent handle sections  10  and  11  from being compressed and thus rub against the tool bit driver  13  and restrict free rotation of the tool bit driver. 
         [0051]    A small clearance gap between the inner walls  9  of handle section  10  and  11  should be maintained to allow free rotation and effective positioning. Stem feature  29  along with the mating hole feature  30  with one or more locations on handle sections  10  and  11  add additional strength to the hand toolkit instrument especially when significant torque is applied to the tool bit driver. Another embodiment of this invention is the relationship between the inside wall radius  25  of handle sections  10  and  11  and the outside of the protruding end of tool bits  17  and  18  (shown in  FIG. 1  and  FIG. 2 ). Inside wall radius  25  performs several functions that include giving clearance for the tool bits  17  and  18  in that the they mimic a similar but slightly smaller radius when the multi-chambered tool bit cartridge  12  is pivoted to its closed and home position, the close proximity of the inside wall radius  25  prevents tool bits  17  and  18  from dislodging from multi-chambered tool bit cartridge  12  should the hand toolkit instrument be dropped or jostled and the shape of the radius  25  adds significant strength to the handle sections  10  and  11 . This is further exampled in  FIG. 7 . 
         [0052]    The types of magnets that will function best are permanent magnets that do not require a keeper or shunt to maintain the integrity of the magnet. A rare earth neodymium magnet is preferable. Other optional methods of maintaining the position of the multi-chambered tool bit cartridge  12  and bit driver  13  in relation to handle sections  10  and  11  are with a detent device such as a ball detent, a floating plate multiple position detent, a mechanical feature that provides a detent between the tool bit cartridge and handle as well as the tool bit driver and handle or a feature that provides friction between the handle and multi-chambered tool bit cartridge and/or tool bit driver 
         [0053]    A similar exploded isometric view is shown in  FIG. 4  is to that of  FIG. 3 . The exception is that in place of hole provisions  33  and  36  as well as plugs  34  and  35  shown in  FIG. 3 , in  FIG. 4  there are shown positioning plates  50  and  55  that situate in mating holes  52  and  57  respectfully. The positioning plates can be magnets or of a ferromagnetic material in a similar arrangement as they relate to similar components outlined in the description of  FIG. 3 . The quantity and angular placement of opposing magnets or ferromagnetic fingers located on the plates and in the side walls of the flanking components along the circumscribed circumferences will determine the number and location of semi-secure positions for the multi-chambered tool bit cartridge  12  and tool bit driver  13 . 
         [0054]      FIG. 5  depicts an exploded view of a hand toolkit instrument with a multi-chambered tool bit cartridge  12  and tool driver  13  but of a simple design including a one piece handle  10 / 11  with semi-secure positioning by applying friction between the handle  10 / 11  and tool bit cartridge  12  and the handle  10 / 11  and driver  13  by tightening fasteners  14 ,  15  and  20 . All other positioning features as described in  FIG. 3  and  FIG. 4  are not included in this manifestation. Although any degree of complexity as described in  FIG. 3  and  FIG. 4  can conceivably be added to the hand toolkit instrument shown in  FIG. 5 . 
         [0055]      FIG. 6  illustrates the hand toolkit instrument shown in  FIG. 1  in phantom view and is one example of multiple positions that the multi-chambered tool bit cartridge  12  and tool bit driver  13  can pivot in relationship to the handle  11  in semi-secured or a locked positions. 
         [0056]      FIG. 7  is a top view and sectional view of a hand tool similar in design to that shown in  FIG. 2  with the multi-chambered tool bit cartridge  12  and bit driver  13  in closed or home positions. The pivoting radius of both the multi-chambered tool bit cartridge  12  equipped with tools and tool bit driver  13  are shown as well as their respective handle clearance radius. The tool bit cartridge radius in relationship to the handle clearance radius  25  is important for retaining the tool bits in there chambers and prevents spillage should the hand tool instrument be dropped or jostled while the tool bit cartridge is in its closed and home location. 
         [0057]      FIG. 8  further exemplifies the design flexibility of this invention displaying a folding toolkit with a multi-chambered tool bit cartridge  12  in a retracted and closed position and fixed (non-rotating) tool driver stem  60 . 
         [0058]      FIG. 9  illustrates with the use of similar design features as in  FIG. 1  and demonstrates how the quantity of tool bits can be increased as well as contained and accessed with the use of additional multi-chambered tool bit cartridges  12  with within the handle sections  310  and  311 . 
         [0059]      FIG. 10 through 20  and  FIG. 30  are examples of various multi-chambered tool bit cartridge designs and features. Although some of the examples differ in appearance they all exhibit the primary design parameters which are at the focal point of this invention which is the design of a hand tool system that will store and make accessible for selection and use the utmost quantity of fastener tools within the confines of the hand tool handle. This is accomplished by associating the common geometric consistencies that exist between each bit tool in a X, Y, Z matrix, providing access to the multi-chambered tool bit cartridge from more than one side in a radial or axial orientation either for purposes of accessing a particular tool bit or swing clearance of the tool bit cartridge. When required, aligning rows or columns associated with the X and Y axis on different plane levels (or differences in the mounted height of a tool bit) as associated with the Z axis. The examples shown here are a selection of multi-chambered tool bit cartridge designs and features, they are not an absolute accounting of all designs. Given the wide range of function and size of tool bits and sockets including such items as slotted, Phillips, hex, Torx, square and posi driver bits, nut drivers and sockets, drill bits and tap bits that can be accommodated in such a system it would be impractical to give examples of every design. Although the means for manufacturing and the material used for a given multi-chambered tool bit cartridge may vary, injection molding of a semi ridged elastomeric material may prove to be most effective. 
         [0060]      FIG. 10  displays a similar multi-chambered tool bit cartridge  12  as shown in  FIG. 1  with features consistent with the intention of this invention including an X, Y and Z matrix, multiple planes and use of two sides of the tool bit cartridge. Feature  21  is a central pivot point and features  31  are components for a semi-secure positioning function.  FIG. 11  differs from  FIG. 10  demonstrating the ability to accept tool bits of different lengths using an offsetting pivot point  21 . Illustrated in  FIG. 12  is a feature to accommodate tool bits that are longer than the radius of the multi-chambered tool bit cartridge  200  in a staggered arrangement. To accomplish this axle bearing  210  protruding from each side wall of the tool bit cartridge and is designed to fit into and pivot in the handle of the hand toolkit instrument. This frees the core of the tool bit cartridge by not requiring a pivot point to protrude through the core of the tool bit cartridge.  FIG. 13  is equipped with the same axel bearings  210  as shown in  FIG. 12  and able to accommodate long tool bits but the tool bits are accessed from one side of the tool bit cartridge in a non-staggered matrix.  FIG. 14  accommodates short tool bits from one side and features an offset pivot point  21 . Shown in  FIG. 15  is Item  265 , an elastomeric overmold with an inside surface  268  that is clad to the outside surface of the multi-chambered tool bit cartridge  260 . The purpose of this feature is to allow for a strong tool bit cartridge made from a hard material to be used while at the same time the elastomeric overmold  265  will grip the tool bit and hold it in place until selected. Additionally the tool bit access holes  266  in the elastomeric overmold  265  can be made slightly smaller than the access holes  264  located in the tool bit cartridge so as to apply additional gripping frictional force to the tool bit. Multiple views show in  FIG. 16  are of several multi-chambered tool bit cartridges  271  ganged together along a common axis and that allows for a single cartridge or multiple tool bit cartridges to be selected.  FIG. 17  is of a single-chambered tool bit cartridge for multiple tool bits  240 . In this instance the tool bits are razor knife blades. In that there is standardization in size of razor knife blades and that they have a flat profile, they can be grouped in a single chamber  241 . Transversely mounted in relation to the handle shown in  FIG. 18  or parallel mounted in relation to the handle as shown in  FIG. 19  tool bit chambers  19  of multi-chambered tool bit cartridge  290  and  292  can be situated closely together due to step feature  291  and  293  respectively. 
         [0061]    Step feature  291  allows for a portion of the tool bit to hang in free space which forms the first plane while step feature  293  is also equipped with backstop feature  294 . The backstop feature  294  allows for seating of a tool bit to a prescribed depth while still allowing for access to the aft end of the tool bit. To select a given tool bit that is shown mounted in either  FIG. 18 ,  FIG. 19  or  FIG. 30  one would push on the back side of the aft end of the tool bit which in turn would slide it forward into an alternate plane that is aligned with feature  291  or  293  in relation to the remaining stored tool bits that maintain their position at the first plane and allow the tool bit that has been slid to the alternate or second plane to be gripped and removed from the tool bit cartridge. The multi-chambered tool bit cartridge  280  shown in  FIG. 20  is similar to the tool bit cartridge shown in  FIG. 10  with the except that one side of the tool bit cartridge is designed to accept tool bits that are larger in cross section  19  than the tool bits on the opposing side that are smaller in cross section  59 . It becomes apparent that more than one size tool bit can fit into a single multi-chambered tool bit cartridge  280  however the first issue that this presents revolves around the size of the tool bit that the tool bit driver  13  can hold as shown in  FIG. 1  which will only accept one size tool bit. The second issue revolves around accommodating a second tool bit driver in the same location and consuming the same space that is available for a single tool bit driver. 
         [0062]    A solution can be found in  FIG. 21 ; multiple views of split tool bit holders shown in  FIG. 21  allow for two size tool bit holders  72  and  73  to accommodate the two different size tool bit cross sections  19  and  59 . A set of split tool bit holders as shown in  FIG. 21  can be designed in coordination with the multi-chambered tool bit cartridge shown in  FIG. 20  where as two or more bit holders can consume the same width as a single bit holder with the strength that is required for the larger of the two bits to be emphasized with a greater cross sectional area at its aft end  73  than that of the smaller bit holder&#39;s cross sectional area at its aft end  72 . In an adjacent and opposed arrangement for mating two dimensionally dissimilar tool bit holders made of similar materials while not exceeding the size of the larger tool bit holder and to obtain the optimal strength for each tool bit holder, an approximation can be calculated. 
         [0063]    A 1 =larger extended tool bit cross sectional area 
         [0064]    A 2 =smaller extended tool bit cross sectional area 
         [0000]        A 1+( A 1− A 2)( A 2)/ A 1=cross sectional area of the aft end for the larger tool  73 
 
         [0000]        A 1−( A 1− A 2)( A 2)/ A 1=cross sectional area of the aft end for the smaller tool  72 
 
         [0065]    In this arrangement, the pivoting aft end of each tool bit driver  70  and  71  will align axially at the side face  74  and side face  75  while each of the working ends of tool bit drivers  70  and  71  consume the same cross sectional area as tool bit driver  13  shown in  FIG. 1  except that they are offset by two times the height as well as any web clearance that may be required in the design of the tool handle and that depending on the orientation of the hand tool instrument, one of the tool bit drivers  70  and  71  will pivot clockwise and the other will pivot counter clockwise into position for use. For the same reason as described in the explanation of the solution outlined in  FIG. 21 , extended tools dissimilar in size and with lug aft ends as well as extended looped tools as shown in  FIG. 22  where one extended tool might be of metric dimensions and the other fractional inch dimensions the same formula an approximation can be applied thusly as long as all dimensions are translated to the same units. 
         [0066]    A 1 =larger extended tool shank cross sectional area 
         [0067]    A 2 =smaller extended tool shank cross sectional area 
         [0000]        A 1+( A 1− A 2)( A 2)/ A 1=cross sectional area of the aft end for the larger tool  83 
 
         [0000]        A 1−( A 1− A 2)( A 2)/ A 1=cross sectional area of the aft end for the smaller tool  82 
 
         [0068]    The same would hold true when mating two extended looped tools made of similar materials but of dimensionally dissimilar sizes in an adjacent and opposed arrangement and aligned on a common shaft and that have uniformly circular geometries or regular polygons that are configured using an inscribed circle while not exceeding the size of the larger diametrical extended tool D 1  when mated along surfaces  84  and  85  then, the dimensions for the diameter can be substituted for the cross sectional area and an approximation is calculated thusly. 
         [0069]    D 1 =larger extended tool cross sectional area 
         [0070]    D 2 =smaller extended tool cross sectional area 
         [0071]    T=thickness of tool aft end 
         [0000]        D 1+( D 1− D 2)( D 2)/ D 1= T 1 for the larger diameter tool  83 
 
         [0000]        D 1−( D 1− D 2)( D 2)/ D 1)= T 2 for the smaller tool  82 
 
         [0072]    Multiple views of extended tools with spacer in a similar arrangement to  FIG. 21  and  FIG. 22  are shown in  FIG. 23  that also shows spacer  96 . Spacers either in a washer form or attached to the handle are often used for strength, alignment and to reduce friction between the mating surfaces, in this instance surfaces  94  and  95 . Optimizing the strength of each diametrical extended tool aft end can be a significant a design factor when two extended tools aft ends are occupying the same thickness as the thickness of the shank of the larger extended tool. A spacer can be used with accommodations for the geometrical differences between the two tools by proportionally subtracting the thickness of the spacer from each extended tool aft end while using the above formulas or the thickness of a spacer (S) an approximation can easily be calculated in a more simple form. 
         [0073]    R 1 =larger extended tool radius  93   
         [0074]    R 2 =smaller extended tool radius  92   
         [0075]    S=thickness of a spacer if it is to be used  96   
         [0000]        R 1− R 2 =S  (thickness of the spacer)
 
         [0076]    This would therefore allow extended tool with either lug or looped aft ends to conform to the object of this invention. Till now, extended hex toolkits that are mounted in descending order according to size and pivot on a shaft from a home position of a common handle in metric sizes are supplied as a separate toolkit than toolkits of fractional inch (SAE) size of a similar arrangement. By using the above formula and as an example, arranging the metric extended tools on one of the open sides of the handle and the SAE size extended tools on the opposing open side of the handle it is now possible to provide a single hand toolkit instrument that includes two full sets of tools, one being metric extended tools in a descending order and the other being SAE extended tools in an accompanying descending order. One set will pivot clockwise and the other will pivot counter clockwise into position for use. 
         [0077]      FIG. 24  is an isometric view of a hand toolkit instrument which embodies a positional multi-chambered tool bit cartridge  12  in its closed position for tool bit storage and a positional ratchet tool bit driver  160  in an open position for use contained within and in relation to the handle sections  110  and  111 . Although a ratchet tool bit driver is shown other tool driver such as socket tool drivers chuck drivers or collet drivers could also be employed. The handle sections  110  and  110  are shown to be held together with fastener components  14 . An assortment of tool bits  17  and  18  are arranged on two ends of the multi-chambered tool bit cartridge  12  and maintained in a closed and stored position. A tool bit  16  has been selected and inserted into a mating chamber  163  located in ratchet tool bit driver  160  for use. Push button  164  is located on the side of handle section  111  and interconnects with the ratchet driver holder  113 . 
         [0078]      FIG. 25  is an exploded isometric view that illustrates assembly and positioning features of the present invention more clearly. The multi-chambered tool bit cartridge  12  revolves around axle sleeve  22  shown here to be a separate component located between handle sections  110  and  111 . In this view axle sleeve  22  has the functions of being the pivot point for the multi-chambered tool bit cartridge  12 , provide a pathway  23  and  51  to connect fastener components  14  and  20  to hold the handle sections  110  and  111  together and to perform the function of being a spacer that will prevent handle sections  110  and  111  from being compressed and thus rub against the multi-chambered tool bit cartridge  12  and restrict free rotation of the tool bit cartridge. Additionally axle  22  assist in transferring torsion forces when applied during use more uniformly between both halves of the handle sections  110  and  111 . A small clearance gap between the inner walls  24  of handle section  110  and  111  should be maintained to allow free rotation and effective positioning of the multi-chambered tool bit cartridge  12 . Located in the side walls of the multi-chambered tool bit cartridge  12  are hole provisions  31  that accommodate plugs  32 . On the inside walls of handle sections  110  and  111  are recessed mounting provisions designed to cradle the ferromagnetic positioning plates  50 . The same relationship as described in the descriptions for  FIG. 3  and  FIG. 4  regarding magnetic and ferromagnetic materials used for the purpose of positioning apply to  FIG. 25  in regards to semi-secure positioning of the multi-chambered tool bit cartridge  12 . Ratchet assembly  160  is fitted into ratchet holder  113  which also has a second function as a component to a positive engagement multiple position locking mechanism. 
         [0079]    The positive engagement multiple position locking mechanism shown in  FIG. 25  is a unique device that is incorporated into and contained within the handle sections  110  and  111 . Located in handle section  111  is a bridge  167 . The bridge has one or more hole provisions  168  that allow the stem  165  of push button  164  to transverse through the hole provision  168  allowing the gap  166  to span the bridge  167  and form a second bridge that is the face of the push button. Bridge  167  can also provide a seat  8  for fastener  20 . This allows fastener  15  to pass through handle section  110  using clearance hole  26  which passes through handle sections  110  and  111  and the components that make up the positive engagement multiple position locking mechanism and mate with fastener  20  that is situated between bridge  167  and the second push button bridge of push button component  164 , The ability to accommodate fasteners  15  and  20  and connecting the wing or ear sections  27  of handles  110  and  111  add significant strength to the driver portion of the hand toolkit instrument. Linear slide  118  is shown to be attached to handle section  110 . Linier slide  118  is slightly smaller in dimensions than the linier lock  169 . The geometry of the core  119  of linier lock  169  and the geometry of the external face of the linear slide  118  are such that the linear lock can slide back and forth in one direction along the linear slide but is prevented from rotating about the linear slide thus maintaining the same angular cohesion with the handle sections at all times. The linear slide  118  performs a second function of being a spacer that will prevent the wing or ear sections  27  handle sections  110  and  111  from being compressed and thus rub against the ratchet driver holder  113  and restrict rotation of the ratchet driver holder and allow for the smooth motion of the linear lock  169  along the linear slide  118 . Additionally linear slide  118  assists in transferring torsion forces when they are applied during use more uniformly between both of the wing or ear sections  27  of the handle sections  110  and  111 . The linear lock  169  is equipped uniformly spaced integrating spline  120 . The ratchet driver holder  113  is equipped with a corresponding geometry of uniformly spaced gaps  121 . When the hand toolkit instrument is assembled a bias compression spring  117  is fitted into a seat  116  and surrounds the linear slide  118  and a portion of linear lock  169  with one end of the bias compression spring  117  against handle section  110  and the other end against a face of linear lock  169 . The opposite end to that of the spring side of the linear lock  169  mates with stem  165  of push button  164  allowing a uniformly spaced integrating spline  120  of the linear lock  169  to integrate with the corresponding geometry of uniformly spaced gaps  121  of the ratchet driver holder  113 ; fastener  15  is connected with fastener  20  and hold the assembly together. A simulation of this assembly his is shown in the sectional view of  FIG. 28  and  FIG. 29 . 
         [0080]      FIG. 26  is an exploded isometric view similar to  FIG. 25  and that illustrates assembly and positioning features from a different perspective. The difference in description between  FIG. 25  and  FIG. 26  is that tool bit holder  171  is substituted in  FIG. 26  for ratchet assembly  160  and ratchet holder  113  shown in  FIG. 25 . 
         [0081]      FIG. 27  is an exploded isometric view similar to  FIG. 25  and  FIG. 26  and illustrates assembly and positioning features from a different perspective. The difference in description between  FIG. 26  and  FIG. 27  is that tool bit drivers similar to  70  and  71  that are shown in  FIG. 21  have been substituted for the tool bit driver  171  shown in  FIG. 26 , the multi-chambered tool bit cartridge  12  shown in  FIG. 25  and  FIG. 26  have been replaced by the multi-chambered tool bit cartridge  280  shown in  FIG. 20  and the linear lock  169  has been interchanged with a linear lock  282  that features dual rows of uniformly spaced integrating splines  120 . Each row is designed to integrate with the corresponding geometry of uniformly spaced gaps  121  of the tool bit drivers  70  and  71 . 
         [0082]      FIG. 28  is a sectional view of a positive engagement multiple position locking mechanism in its locked state. The bias spring  117  is pushing away from the handle  110  and against the linear lock  282 . The linear lock  282  in turn is forced along the linear slide  118  and to integrate its uniformly spaced spline  120  with the uniformly spaced gaps  121  of drivers  180  at the locations identified as  181 . Additionally the linear lock is pushing against the push button stem  165  of push button  164  extending the pushbutton stem through hole provisions  168  that is formed by the bridge  167  and to an outward position increasing the displacement space  182  which is formed above the bridge  167  located in handle section  111  and below the bridge that is formed by the pushbutton stem  165 . The handle sections are held together by fastener  15  that extends through the core of the linear slide  118  and other components of the locking mechanism as well as the bridge  167  to fastener  20 . This view of the positive engagement multiple position locking mechanism demonstrates a positive engagement system using two drivers  180  however the basic concept can be designed to work with one driver or many drivers as be used to provide a multi-chambered tool bit cartridge as well as other tool devices with a positive engagement multiple position locking mechanism. 
         [0083]      FIG. 29  is a sectional view of the same positive engagement multiple position locking mechanism as shown in  FIG. 28  in its unlocked state. Push button  164  is being forced inward by an operator who applies a force greater than the spring  117  force reducing the displacement space  182  by the stroke length of the push button displacement. The stroke of displacement is less than the width of a single driver or the width of the narrowest driver if more than one driver is being used. The push button stem  165  is transposed through the hole provisions  168  created by the bridge  167  and pushing against and displacing the uniformly spaced spline  120  of the linear lock  169  along the linear slide  118  and away from the uniformly spaced gaps  121  of drivers  180  at the location identified as  181  creating a non-engagement condition between the linear lock  169  and drivers  180 . This allows the drivers  180  to be rotated into a desired position. Releasing the force that is applied to the push button  169  allows the spring  117  to expand returning the linear lock  282  along the linear slide  118  and push button  164  to its normal state as shown in  FIG. 28  and locking the drivers  180  in their new position. 
         [0084]    The multi-chambered tool bit cartridge  300  as shown in  FIG. 30  is a non-rotating design. Its features are consistent with the intention of this invention including an X, Y and Z matrix, multiple planes, use of two sides of the tool bit cartridge and that can be stored in an organized fashion within the confines of a standard size tool handle, the combination of the large size and quantity of a full set of socket type tool bits positioned in a multi-chambered tool bit cartridge combined with the turn radius of the subassembly could only be accommodated within a handle that is greater than what would be considered a standard size tool handle is the reason why the design of the multi-chambered tool bit cartridge is a non-rotating design. In a similar fashion to the tool bits shown mounted in either  FIG. 18  or FIG,  19  removal is promoted by pushing against the aft end of the tool bit which in turn would slide it forward into an alternate plane in relation to the remaining stored tool bits that maintain their position and allow the tool bit that has been slid to the alternate plane to be gripped and removed from the tool bit cartridge. 
         [0085]      FIG. 31  is an isometric view similar to  FIG. 1  of a hand toolkit instrument which embodies a non-positional multi-chambered tool bit cartridge  300  the tool bits and tool bit cartridge do not exceed the dimensions of the open handle and are accessible from two sides for tool bit selection. The positional tool bit driver  13  in an open position for use. The handle sections  310  and  311  are shown to be held together with fastener components  14  and  15  although other means of joining the handle sections such as sonic welding or rivets could be employed. In some instances the handle could be a single component rather than two halves. An assortment of tool bits  317  and  318  are arranged on each side of the multi-chambered tool bit cartridge  300  and fully exposed for selection. A tool bit  318  has been selected and inserted into a mating chamber  58  located in tool bit driver  13  for use. 
         [0086]      FIG. 32  is the same hand toolkit instrument as in  FIG. 31 , an isometric view which embodies a non-positional multi-chambered tool bit cartridge  300 . The tool bit driver  13  in a closed or home position and contained within the handle sections  310  and  311 . 
         [0087]      FIG. 33  is an exploded isometric view that illustrates assembly and positioning features of the present invention more clearly. The multi-chambered tool bit cartridge  300  is of a non-positional design. Slotted provision  319  located in the side walls of the tool but cartridge is shown to engage with tab provision  320  located in the handle  310  and  311  inside wall sections is an example of securing the tool bit cartridge in place. Similar to  FIG. 3  plugs  35  are situated in hole provisions  36  of the inside wall  9  of handle sections  310  and  311  and plugs  37  located in hole provisions  38  of the tool bit driver  13 . Additionally, the tool bit driver  13  revolves around axle  28  shown here to be in two sections and attached to handle sections  310  and  311  although other manifestations of axle  28  can produce its primary functions. In this view axle  28  has the functions of being the pivot point  39  for the tool bit driver  13 , provide a pathway  26  to connect fastener components  15  and  20  and to perform the function of being a spacer that will prevent handle sections  310  and  311  from being compressed and thus rub against the tool bit driver  13  and restrict free rotation of the tool bit driver. A small clearance gap between the inner walls  9  of handle section  310  and  311  should be maintained to allow free rotation and effective positioning. Stem feature  29  along with the mating hole feature  30  with one or more locations on handle sections  310  and  311  add additional strength to the hand toolkit instrument especially when significant torque is applied to the tool bit driver. 
         [0088]    Another application of this invention is illustrated in the views shown in  FIG. 34  that demonstrates how a multi-chambered tool bit cartridge  200  can be adapted to the handle portion of hand power tool  350 . Although a positional multi-chambered tool bit cartridge  200  is shown any manifestation of positional or non-positional multi-chambered tool bit cartridge may apply for this application. 
         [0089]    While the present invention is thus described with what is considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover all various arrangements included within the spirit and scope of the broadest interpretation of this invention.