Abstract:
A portable, fully enclosed compact disc storage apparatus or unit is provided which stores a multiplicity of discs, without risk of damage to their written surfaces. The storage unit comprises a two-part toroidal shaped housing, a circular magazine for supporting the discs, engaged on their unwritten edges by pairs of raised projections limited in height to that of the unwritten portion of a disc. A user-actuated lever engages the bottom of the discs and lift them from the magazine and out of the housing through an access slot. An indexing knob and notches means aligns a disc with the access slot and prevents unwanted rotation of the magazine relative to the housing between disc access and removal. A series of numbers are formed on the outer circumferential flanged edge of the magazine to aid in cataloging and identifying the magazine&#39;s contents.

Description:
FIELD OF THE INVENTION 
     The invention relates to a portable apparatus for the storage of compact discs and more particularly to the storage of a multiplicity of compact discs within a single storage unit for the protection of their written surfaces. 
     BACKGROUND OF THE INVENTION 
     Compact discs (“CDs”) are polycarbonate plastic discs having one or more layers of metal, capable of storing digital information. Most common are music CD&#39;s and CD-ROM&#39;s (CDR and CDRW) and Photo CD&#39;s. 
     It is critical that the discs be protected from scratching in order to maintain the information they store. Most discs, especially music CD&#39;s are retailed in crystal polystyrene cases, secured to the case at their central opening. Crystal polystyrene is highly brittle and the cases are easily damaged. Further storage of large numbers of these cases requires significant space and access to the discs is cumbersome and time consuming. 
     Ideally, CD&#39;s should be stored in compartments free from dust, where the only portion of the disc that comes in contact with the compartment and any device to remove the disc, is the unwritten edge of the disc. 
     It is known to store records and CD&#39;s in storage compartments capable of housing multiple CD&#39;s. 
     Often, CD&#39;s are removed from their original cases and placed inside multi-pocketed, fabric cases, lined with a soft material, for portable storage. Unfortunately, any dust or abrasive material present on the surface of the disc is scratched across the surface of the disc as it is inserted and removed from the case. 
     A number of different types of storage units or magazines currently exist. These range from stands which house CD&#39;s individually, stored in their original cases, to large circular magazines housed within CD players, capable of storing a multiplicity of CD&#39;s readily selectable by a selection mechanism within the player. 
     U.S. Pat. No. 2,952,463 to Vanderzee et al. teaches a record magazine in a toroidal form having records stored face to face, and radially disposed so as to form a complete circle or doughnut. Pairs of flanged circular discs serve as mounts for a plurality of U-shaped wire bails disposed between the individual records to serve as separators. The magazine rotates as a unit about a sleeve. The magazine of this invention is not portable, and the wire bails disposed between the records risk injury to CD&#39;s were they to be so applied. 
     U.S. Pat. No. 3,008,721 to Corbett Jr. et al teaches a record magazine mounted for rotation about a vertical axis having a series of radially disposed record-receiving pockets in which the individual records are carried on edge to extend radially of the axial center of rotation. The pockets are formed by the spaces between major and minor separation plates, one major plate on either side of each pair of facing records, the pair separated by a minor plate. The magazine rests upon an indexing plate having a series of ratchet teeth, one for each pocket and record. Again, the magazine of this invention is not portable, risks damage to a CD&#39;s written surface and does not facilitate hand selection. 
     U.S. Pat. No. 4,791,626 to Staar teaches a fixed magazine for records or discs having compartments located in a circular arrangement about a center axis. The discs are retained in the compartments by spring leaves. In this patent, the disc changer rotates rather than the magazine, however the magazine may be removed for wholesale change of its contents. The spring leaves used to separate the contents could potentially damage CD&#39;s. 
     U.S. Pat. No. 5,031,164 to Rockola et al. references earlier prior art to indicate that the magazine is toroidal and rotatable to selectively position a CD in an indexed position where it may be engaged by a gripper arm assembly. The CD&#39;s are stored in pockets having wire bails and pads to insulate the CD&#39;s from one another. The pads still contact the CD surface and often time can accumulate abrasive material which would risk damage to the CD. 
     Only U.S. Pat. No. 5,255,797 to Kos provides a portable carrier which deals specifically with protection of the circular semiconductor wafers it is designed to carry. The system involves a complex arrangement of cushioning devices to engage and provide pressure on the edge of the wafer at points adjacent the horizontal diameters of the wafer to prevent movement and damage within the carrier. The patent does not teach a rotatable mechanism for selection, nor does it teach a lifting device to enable convenient hand removal. 
     Another multi-compartmented storage device is described in U.S. Pat. No. 4,664,454 to Schatteman et al., wherein a complicated arrangement of V-shaped grooved members and multiple lever and securing arms are adapted to engage the edge of the disc and rotate it into and out of a series of compartments within a magazine, along an arcuate path defined by pins and slots and actuated by levers and springs. This storage device requires complex construction, especially when used in conjunction with a CD player or recording mechanism, and is neither portable nor inexpensive. 
     Other multiple storage compartments are described for use within automated CD players, many having mechanisms that select and rotate the disc into the player by touching the written surface of the disc. None of these units are designed to be portable and wholesale exchange of their contents is time consuming as access to the magazine is limited. 
     Clearly there is a need for a portable CD storage unit, that is simply constructed, engages discs solely at their unwritten edges for easy removal and insertion from the unit and allows easy wholesale exchange of the contents of the storage unit. 
     SUMMARY OF THE INVENTION 
     The current invention addresses the problems in the prior art disc storage units by providing a rotatable indexed magazine for disc storage housed within a fully enclosed portable storage unit and a user-actuated lifting magazine, for lifting the disc from the storage magazine and through a slot in the top housing. More particularly, the storage unit supports discs solely at their unwritten edges while being stored in the magazine, while being lifted from the magazine by the lifting mechanism and as they are guided through the lid slot. 
     In simple terms, the storage unit comprises a two-part separable toroidal shaped housing, a circular, rotatable magazine for disc storage, the magazine supporting disc only by their unwritten edges, an indexing means to align a disc for removal and a lifting mechanism to raise a disc out of the magazine and through a slot in the top housing, for grasping by the user. 
     More specifically, the housing is formed of two substantially identical halves which can be removeably clipped together, at a flange formed about the outer circumferential edge, to create a unitary, portable structure. Each housing half has radially extending slot formed thereon, a disc access slot on top, a lifting actuation slot on the bottom, and both of which are angularly aligned. Discs are held in a magazine, supported and rotatable on a pedestal, formed at the center of the housing. The magazine is comprised of a multiplicity of radially extending supporting members or spokes forming V-shaped slots therebetween at the base of the magazine through which the edges of the discs depend. A corresponding number of pairs of parallel, raised projections are formed on the inner and outer circumferential walls of the magazine, aligned with the V-shaped slots. The height of the projections is limited so as to support the edge of a disc solely at the unwritten portion. 
     A lifting mechanism is provided comprising a lever, pinned at a fulcrum outside the bottom housing and a lever actuation mechanism. An inner end of the lever is angled up towards the center of the pedestal of the bottom housing, extending through the bottom housing actuation slot where it is pinned to the actuation mechanism therein. An outer end of the lever arm extends radially outwards, under the V-shaped slots in the magazine, the outer end of the lever rising through the actuation slot in the bottom housing for raising a disc from the magazine to project out of the access slot, when actuated. 
     The lever actuating mechanism comprises a plunger and spring, the plunger extending downwards within the bore of a tubular knob located at the center of the magazine, its lower end pinned to the lifting mechanism&#39;s lever arm. The spring is sandwiched between a circular button at the top of the plunger and the magazine. Downward pressure on the button top of the plunger actuates the lever arm and when released, the spring returns the plunger upwardly to its original position within the bore. 
     The magazine, rotated by turning the knob at its center, has notches formed on is underside, each notch aligned with a pair of raised projections, a V-slot and thus a disc. Optionally, numbers can be added to the outer edge of the magazine, aligned with each disc, for identification and indexing purposes. 
     A locking arm is pivotally attached at the base of the housing, aligned with the bottom housing slot and extending through the bottom housing slot to cooperate with the notches on the magazine to limit rotation, during disc removal. The locking arm can be release from the notches by pressing the top of the arm which causes the locking arm to rotate outwardly from its pivot at its pinned end, freeing its inner edge from the notches in the magazine, allowing the magazine to rotate freely. 
     Therefore, in a broad aspect of the invention, apparatus is provided for storage and indexed retrieval of multiple data storage discs having unwritten peripheral edge portions, comprising semicircular toroidal-shaped top and bottom housings; the top housing having a radially extending disc access slot formed therein; a semicircular toroidal magazine rotatably supported within the bottom housing and having a multiplicity of corresponding and radially spaced inner and outer pairs of projections for supporting a multiplicity of angularly spaced discs within the magazine, the projections being limited in height so as to engage a disc solely at its unwritten edge; means for indexing the magazine relative to the access slot for aligning a disc in the magazine therewith; and means for lifting a disc from the magazine&#39;s projections and through the access slot. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 a  is a top plan view of the housing; 
     FIG. 1 b  is a cross-sectional view of the housing, without the magazine, as viewed through section A—A of FIG. 1 a . The background has been omitted in the sectional view right of the axis; 
     FIG. 2 is a perspective view of the bottom housing showing the mated alignment projections on 180° of an outer circumferential flange; 
     FIG. 3 is a perspective view of the magazine; 
     FIG. 4 a  is a pie-shaped perspective and cut away view of the magazine showing the spaced raised disc supporting projections and the V-slots; 
     FIG. 4 b  is a partial cross-sectional view of a portion of the magazine and a disc illustrating the interaction of the projections and a disc; 
     FIG. 5 is a cross-sectional view of the bottom housing, the lifting mechanism, baseplate and locking mechanism with respect to the housing bottom; 
     FIG. 6 is an exploded view of the actuation mechanism, showing the lever arm, the spring, the plunger and the indexing knob; 
     FIG. 7 is an upward, perspective view of the underside of the magazine showing the indexing notches; 
     FIG. 8 is a partial perspective view of the locking arm engaged in the bottom housing&#39;s actuation slot. The indexing flange is cut away to better illustrate the inner edge of the vertical locking arm engaging the indexing notches; 
     FIG. 9 is a perspective view of the baseplate; and 
     FIG. 10 is a view of the flange of the top and bottom housing clipped together with a C-clip. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     A storage unit  1  is provided for storing a multiplicity of CD or discs in numbers of about 72. The storage unit  1  comprises a housing  2 , a rotatable magazine  9  for supporting discs within the housing  2 , a means or mechanism  20  for lifting discs from the magazine  9  and out of the housing  2 , a means or mechanism  23  for actuating the lifting mechanism  20 , an indexing means  40  for aligning the disc with the lifting mechanism  20  and a locking mechanism  50  for preventing relative rotation of the magazine  9  and housing  2  during disc removal. 
     The Housing 
     Having reference to FIGS. 1 a - 1   b , the disc storage unit  1  is shown comprising a two-part, toroidal shaped housing  2 , having a top semi-circular toroidal housing  3  and a bottom semi-circular toroidal housing  4 . More specifically, the top and bottom housings  3 ,  4  are substantially symmetrical and have penannular raised flattened portions  5  formed about the apex of each semi-circular toroidal housing  3 ,  4 . The circular section of the toroid is sized appropriately for a compact disc or CD. A radial access slot  6   a  is formed in the top housing  3 , sized for the thickness and diameter of a disc. The access slot  6   a  extends from about the top housing&#39;s inner edge to its the outer edge. An actuating slot  6   b  is formed in the bottom housing  4 . The slots  6   c ,  6   b  are located angularly, at a point between the ends of the raised flattened portions  5 . The housing slots  6   a ,  6   b , formed in this fashion, do not extend completely radially through the housings  3 , 4 , leaving the structures intact as circular elements. Further, the width of the access slot  6   a  converges at either end to minimize lateral movement of a disc once it is engaged in the slot  6   a . Optionally, a press fit insert (not shown) can be fitted to the top housing slot  6   a  so as to modify the access slot, causing it to converge at the disc edges and provide edge guides which converge downwardly and inwardly into the top housing  3  to guide discs in an out of the magazine  9 . 
     As shown in FIGS. 2 and 10, an outer flange  7  is formed about each of the outer rim of the top housing  3  and the bottom housing  4 , the flange  7  having mated alignment projections and spaces  8  formed about each flange  7  to ensure proper angular alignment or orientation of the top access and bottom actuating slots  6   a ,  6   b . The complementary projections and notches  8  are aligned and the top and bottom housings  3 , 4  are clipped together with C-clips  62 , clipped about the aligned outer flanges  7  as shown in FIG. 10, to form a single housing  2 . 
     The Magazine 
     The invention further comprises a semi-circular, toroidal magazine  9 , as shown in FIG. 3, which rests rotatably within the bottom housing  4  and cooperates with the disc lifting mechanism  20 , for enabling elevation of the disc out of the magazine  9  and through the top housing slot  6   a  for grasping and removal by the user. 
     More particularly and having reference again to FIG. 2 and 3, an inner housing flange  10  of the bottom housing  4  forms a pedestal  11 . An inner flange  12  is formed about the inner circular edge of the magazine  9 , which is rotatably supported on the bottom housing pedestal  11 . The inner magazine flange  12  further supports, at its center, a tubular inset  13 , shown in FIG. 4, for supporting the actuation mechanism  23 , described in greater detail later. 
     An indexing flange  14  is formed at the outer peripheral edge of the magazine  9  and is smaller in diameter than the top  3  and bottom  4  housing outer flanges  7 , thereby allowing the magazine  9  to rotate freely within the bottom housing  4 . 
     The magazine, as shown in FIG. 4, further comprises a plurality of radially extending supporting members  15 , which join an inner circumferentially extending wall  16  to an outer circumferentially extending wall  17 . The supporting members  15  are spaced apart from one another, defining radially extending and outwardly widening V-shaped access slots  18 . Side by side pairs of raised and parallel projections  19  are formed on the circumferential inner  16  and outer  17  walls, aligned with the center of each V-slot  18 . The projections  19  are limited in height for engaging a disc solely at its unwritten edge  100  and projection pairs are spaced apart sufficient to retain the disc&#39;s edge and limit lateral movement. 
     The Lifting Mechanism 
     Having reference to FIG. 5, the lifting mechanism  20  comprises a lever arm  21 , a fulcrum  22  and an actuating mechanism  23 . An inward portion of the lever arm  24  extends radially inward from the pinned fulcrum  22  to the pedestal  11  of the housing bottom  4 . An outward portion of the lever  25  extends radially outward and beneath the V-shaped slots  18  in the magazine  9 . The length of the inward portion  24  is shorter than the outward portion  25 , for magnifying the actuation movement. The inner lever  24  is angled upward from the pinned fulcrum  22  to permit downward deflection. As shown in FIG. 6, the outer lever  25  has a groove  26  formed along an upper edge  27 , oriented adjacent and facing the bottom of the magazine  9 , so as to engage and support the edge of a disc when lifted from the magazine  9 . Further, the upper edge  27  of the outer lever arm  25  is slightly concave in shape to correspond with the edge of the disc, providing contact and support to a greater percentage of the disc edge. 
     Having reference to FIG. 6, the lever actuating mechanism  23  comprises a plunger  30  and spring  31  fitted within the tubular insert  13  at the center of the magazine  9 . The plunger  30  comprises a structurally finned body  32  having a pointed lower end  33  a flat circular button  35  is formed on the plunger&#39;s upper end  34 , supported by the fins  36  of the body  32 . The lower end of the plunger  30  is pinned in a slot  37  at the proximal end of the inner lever arm  24 . 
     As the plunger  30  is depressed, the lever arm  21  pivots at the pinned fulcrum  22 , causing the outer end of the lever arm  25  to raise up into the bottom housing slot  6   b , engaging and lifting a disc from it&#39;s V-shaped magazine slot  18 . The disc is lifted upwards through the top housing slot  6   a  where it projects sufficiently to be removed from the storage unit  1 , by grasping the unwritten edges  100  on either side of the disc. 
     Indexing Means 
     In a preferred embodiment of the invention, an indexing means  40 , shown in FIGS. 5-7, is provided to assist in selecting a particular disc from the multiple discs stored in the unit  1  and align it with the slots in the housing  6  and with the lifting mechanism  20 . As shown in FIG. 5, the indexing means  40  comprises an axial knob  41 , used to rotate the magazine  9 , a series of notches  42  on the underside of the magazine  9  and a locking mechanism  50  for limiting unwanted rotation of the magazine  9  once the disc is aligned for removal from the housing  2 . 
     The knob  41  comprises a tube  43  having an upper  44  and lower  45  end and a bore  46  slightly larger in diameter than the tubular insert  13  in the magazine  9 . The bore  46  is partially closed at its upper end by an annular lip  47 . The spring  31  of the actuation mechanism  23  is placed over the body of the plunger  32  and both are inserted into the bore of the knob  46 , the top button  35  of the plunger  30  residing below and restrained by the annular lip  47 . The knob  41  is fitted over the tubular insert  13  in the center of the magazine  9 , the plunger  30  extending into the housing  2  through the bore in the insert  13 . The spring  31  is sandwiched between the top of the tubular insert  13  and the annular lip  47  for biasing the plunger upwards. The plunger  30  is free to move within the tubular knob&#39;s bore  46 . The knob  41  is grasped by the user and rotated, causing the magazine  9  to rotate. Preferably, a serrated collar  48  is formed intermediate the knobs ends  44 , 45  and closer to the upper end  44  to provide a better gripping surface for the user. 
     As shown in FIG. 7, the notches  42  formed at the underside of the magazine are below the indexing flange  14 . Each notch  42  corresponds to a pair of disc projections  19  on the outer circumferential wall  17 , and in so doing, provides means to align the V-slot  18  with the top housing slot  6   a  and the lifting mechanism  20 . 
     The locking mechanism  50  comprises a vertical locking arm  51  and a pinned pivot  52 . The vertical locking arm  51  as shown in FIG. 5 is pinned at a pivot  52  at the outer circumferential wall of the bottom housing  4 , aligned with the bottom housing slot  6   b . As shown in FIG. 8, an inner edge of the locking arm  53  extends within the slot  6   b  for engaging the notches  42  on the underside of the magazine  9 . A horizontal button surface  54  attached to an upper, outer edge of the locking arm  51  extends outside the housing  2 . Downward pressure, applied to the locking arm button  54 , radially disengages the arm&#39;s inner edge  53  from the notch  42  on the magazine  9  as the vertical locking arm  51  rotates slightly outward, about the pivot  52 . The magazine  9  is then free to rotate. The magazine can then be rotated by turning the knob  41 . Once pressure is released from the locking arm button  54 , a spring  55  biases the locking arm  51  to move slightly radially inward to engage one of the notches  42  on the magazine  9 . As the magazine notches  42 , projections  19  and V-slots  18  all correspond, the user must ensure that the locking mechanism  50  engages a notch  42  to ensure proper alignment for removal of a disc. 
     Preferably, for ease of manufacture, a baseplate  60 , as shown in FIG. 9, is fixed to the outside of the bottom housing  4  (FIG. 5) to provide a unitary structure for attachment of the lifting mechanism fulcrum  22  and the vertical locking arm pivot point  52 , between the ends of its raised flattened portions  5 , to correspond with the slot  6   b  formed thereon, as shown in FIG.  5 . 
     Optionally, as shown in FIG. 8, a series of raised numerals  61  can be formed on the indexing flange  14  of the magazine  9 , aligned with each set of projections  19 , to assist with cataloguing the contents of the magazine. 
     In a preferred embodiment of the invention, the housing  2  is made from injection molded, polycarbonate plastic which may be clear or opaque and is extremely durable and resistant to breakage. Other components are molded from ABS plastic. 
     Operation 
     Best shown in FIG. 5, discs are loaded into the magazine  9  in the bottom of the housing  4 , placed vertically on edge between each pair of projections  19 , their lower edges depending through the V-slots  18  in the base of the magazine  9 . Discs can be loaded into the magazine  9  either with the top housing  3  off, or one by one through the top housing slot  6   a . If apart, the top housing  3  is placed onto the bottom housing  4 . The mated projections and spaces  8  are aligned and the two housing pieces removeably clipped together with C-clips  62 . 
     The locking arm button  54  is depressed to disengage the locking arm  51  from the notches  42  on the base of the magazine  9  at the same time the user grasps and rotates the knob  41 , causing the magazine  9  to rotate freely until the desired disc is aligned with the top housing slot  6   a . The locking arm button  54  is released for engaging the locking arm  51  with the notch  42  in the base of the magazine  9  corresponding to the selected disc. 
     The user exerts pressure downward on the top button  35  of the plunger  30 , causing it to move downward within the bore of the knob  41 , compressing the spring  31  and actuating the lever arm  21  (Dashed lines). As the lever arm  21  pivots about fulcrum  22 , the plunger tip  33  is able to move axially within the slot  37  in the lever arm  21 , allowing maximum downward deflection of the inner lever  24 . The outer lever  25  rises through the bottom housing slot  6 , engaging the edge of the disc in the groove  26  in its upper edge  27 , lifting it upward out of the V-slot  18  and through the top housing slot  6   a , where it can be accessed by the user. The disc can now be removed by the user by grasping the disc at its opposing, unwritten edges  100 , between the thumb and forefinger. 
     When pressure on the plunger  30  is released, the spring  31  decompresses and the plunger  30  is pushed up within the bore of the knob  41  and insert  13 , to its original position, causing the lever arm  21  to return, as well, to its original or non-actuated position (Solid lines) so that the magazine  9  can be repositioned. 
     Discs can be replaced into the magazine  9 , without removing the top housing  3  by a reversal of this same process. 
     Wholesale exchange of discs within the magazine  9  can be made, at any time, by removing clips  62 , removing the top housing  3  and manually exchanging the discs.