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Sept-6, 1938. A. M. MARTIN LOOSE LEAF DEVICE Filed Feb. 1, 1935 2,129,224 I 2 Sheets-Sheet 2 2,129,224 Patented Sept. 6, 1938 UNITED STATES FATENT OFFICE 2,129,224 LOOSE LEAF DEVICE Alfred M. Martin, Park Ridge, Ill. Application February 1, 1935, Serial No. 4,507 9 Claims. (01. 129-17) This invention relates to loose-leaf devices more particularly of the binder type including prong holding means in the form of a. toggle device and a supporting member such as a binder back pro 5 viding a support for the toggle for free movement thereon. Binders of this type which are generally of large size, should be easily manipulated to close or spread the prongs and should at the same time 10 provide a ?rm and non-collapsible support for the leaves to be written upon, while a?ording a writing surface as flat as possible. Heretofore these objects have been sought in some instances by maintaining the support or binder back against 15, tilting and, in other instances, by permitting the support or binder back to tilt. In each case, whether with the tilting or non-tilting support, it has been important to prevent collapsing of the support. Supporting means of the ?rst-mew 20 tioned type is disclosed in my Patent No. 1,722,810 of July 30, 1929; and in my copending application Serial No. 752,219 ?led November 9, 1934., I have described and claimed an improved device of the tilting type. My present improvement, among other objects, 25 aims to combine advantages of both the non-tilt ing and the tilting types referred to and thus re taining the greater advantages in stability and ?exibility peculiar to each type. Other objects and advantages will be apparent 30 from the following description taken together with the accompanying drawings, in which Figure 1 is a partial end view of a binder con structed in accordance with my invention, the 35 binder being shown in‘closed position; Figure 2 is an end view of the binder of Fig. 1 in normally open position for the making of entries on the loose-leaf sheets or for reference thereto; 40 Figure 3 is a similar view of the binder in nor mally open position for the removal or insertion of sheets; and Figure 4 is a similar view of the binder in ex 5 treme open position. Referring in detail to the illustrative construc tion shown in the drawings, I have indicated, in general, a binder ID of the class described, it being su?icient for present purposes and for those skilled in the art, to show only that portion of the binder which includes the leaf or sheet-engaging means such as the prongs, and the support or hinder back which supports the prongs for movement thereof when the binder is open. Furthermore, it is 55‘; deemed su?icient to show merely end views of the construction referred to, as these best illustrate my novel improvement, and it will be understood that the corresponding plan views, if shown, would in general depict the usual book formation. In accordance with my present invention, the 5 improved construction includes broadly, a binder back embodying an inner normally trough-like element H and an outer normally trough-like element l2, these two elements, as shown in Figs. 1 and 2 being in telescoping or nesting relation, 10 the element l I constituting the means for directly carrying the leaf-impaling prongs I3, l4 and the element l2 constituting the support therefor, and in this instance, the binder back proper. The element l2 in this instance constituting 15 the binder back proper is, in accordance with my invention, formed of two angularly displaceable sections such as the metallic members [5, extend ing longitudinally of the binder back, that is, away from the observer referring to the views of the 20 drawings. Each of these members l5 has, in this instance, an upright portion [6 and an in tegral portion ll’ extending at right angles to the portion IS, the portions ll of each member extending toward each other, normally in a com 25 mon plane, to meet adjacent a median line run ning longitudinally of the binder back. Each of the said angular portions provides a base for the binder extending for a material distance trans versely of the binder back. The angle between 30 the portions I6, I l as at l8 desirably forms a relatively sharp, square corner for purposes pres ently pointed out, this corner being relatively sharp and. square in the sense that it is a right angle but being exteriorly slightly rounded by 35 reason of the resilient facing 22 to permit rota tion on the table top or the like 23. Secured to each of the portions I1 is a hinge-leaf l9 also extending, in effect, longitudinally of the binder, each of these hinge-leaves having alined hinge 40 lugs 20 through which is passed the usual hinge rod or pintle 2| thus ?exibly connecting the angu lar members 15 medially of the binder back for free relative angular movement of these members. In this instance, the members l5 are per 45 mitted relative angular movement on the hinge 2 I , so that these members may move about the hinge as a pivot in either direction. By this is meant that the hinge may be either buckled upwardly as shown in Fig. 2, in which event the hinge 21 is disposed on one side of a plane passing through the corners 18, or, as shown in Fig. 4, the members I5 may be buckled in the opposite direction so that the hinge is disposed upon the opposite side of a plane passing through these corners. Under 55 2 2,129,224. some circumstances, it might be desirable to limit relative angular rotation of the members l5, as will be readily understood. These members, are desirably faced with leather or ?ber, as at 22, to prevent scratching of the tabletop 23, the facings 22 being spaced apart as at 24 in the vicinity of the hinge 2! so as to avoid interference with the hinge, but being desirably of suf?cient thickness so as to be ?ush with the hinge-lugs 29, thus pro 10 viding that the members | 5, in effect, may rest ?rmly upon the tabletop or other working surface 23 with the portions |'| parallel therewith as the hinges 30, to move laterally in a direction apart. In accordance with my invention, such spreading movement of the toggle device is per mitted by my novel provision for hinging the supporting members l5 of the binder back l2 at 2|, thus permitting the supporting members IE to have relative angular movement which spreads them apart correspondingly in the vicinity of the upright portions l6 upon which the hinges 30 are carried. Further to accommodate this movement, 10 the corners l8 may move slightly inwardly in a direction towards each other on the tabletop 23. The toggle is thus supported for free movement of shown in some of the views of the drawings. The element H, as here shown, is the usual its medial hinge 26, the hinge 2| of the supporting toggle device similar to the corresponding ele-_ ment shown in my prior disclosures above re ferred to and also includes two complementary means being responsive to the movement of the toggle and permitting the supporting means to automatically adjust itself to the movement of members 25 medially hinged as. at 26 upon a hinge-pin parallel with the hinge-pin 2| and also 20 each having the normally upright portion 21 and right-angularly directed portions 28 which meet adjacent the common plane of the hinges 2| and 26, the portions 28 being advantageously of box t the toggle. The parts as shown are so balanced and the movement of the corners l8 on the table top is so slight that little effort is required to 20 spread the prongs apart to the position shown in Fig. 2. At the same time the parts are in stable equilibrium and non-collapsible, so that any nor mal amount of pressure may be placed upon either like formation, for one purpose, for housing any suitable looking or catch mechanism which may side of the record leaves Without causing the be employed, to prevent, until released, relative angular rotation of the parts. Also since the son ensuring a ?rm, smooth, writing surface. Any parts 28 are of box-like formation, the members 25 of the toggle device can be buckled in only 30. one direction, that is upwardly, or away from element l2, thus preventing collapse of the struc ture. Further in accordance with my present inven tion, the elements ||, l2 are ?exibly connected at their outer edges, in this instance by alined hinge-lugs 29 some of which are formed inte grally with the portions l5 of the members l5 and some formed integrally with the parts. 2’! of the element II, the usual hinge-pins 30 rotatably 40 connecting the parts together, on lines parallel binder back to tilt or move around, for this rea downward pressure exerted on a hinge 34 of one of the covers laterally outwardly of the base or binder-back member which might tend to cause 30 the adjacent member vI5 to rotate, is counter acted by the opposite member l5. which tends to resist further upward movement of the hinge 2|, due not only to its own weight but also to the weight of the toggle device and the record leaves thereon. - When it is desired to remove or insert record sheets 32, by a relatively slight e?ort the prongs l3, l4 may be further rotated to spread them com with the hinges 2| and 26. 'One set of sheet-impaling prongs I3, which pletely apart as shown in Fig. 3. During this 40 movement, the toggle device is buckled still fur ther upwardly, the medial hinge 25 moving in this may be appropriately spaced apart longitudinally same upward direction to a point where it is of the binder back, are carried by a bar 3| suit spaced a materially great distance above the hinge 2|. During this movement also the outer 451 edges of the toggle device are permitted to move laterally in a direction apart to their maximum distance, the upright portions l6 of the support~ ing means moving correspondingly apart, where upon after having reached its maximum spread, the toggle device will again contract in the sense . ably secured to one of the parts 21 of the toggle. The other, set of prongs I4 are similarly carried by the other part 21, the prongs |3, |4 being staggered longitudinally of the binder back so as to be moved into and out of overlapping posi tion as shown in Figs. 1 and 2, and being desirably curved on an arcuation substantially concentric with the hinge 28. Thus the leaves or other rec ord sheets 32 may substantially ?ll the binder extending from end to end of the prongs, as - shown in Fig. 1. The usual stiif covers 33 are provided which, as here shown, are desirably hinged at 34 (parallel with the other hinges mentioned) on the parts 25 respectively of the toggle device. The operation of my present improvement is as follows: In the position shown in Fig. 1, the binder is ready to be opened for any purpose. In this posi tion, both parts I‘! of the back members l5 are parallel with the tabletop and rest squarely there on, thus providing a ?rm support for the re mainder of the binder. Upon opening the binder, the prongs l3, l4 may be permitted to come into less overlapped re 70 lation, as seen in Fig. 2, thus a?ording flatter sur faces 36 upon the uppermost leaves or sheets 32, facilitating reference to the sheets or writing thereupon. To permit the prongs to move in a direction apart, the toggle' mechanism H is lbuckled upwardly causing its outer edges, as at that the hinge-points 3|] connecting the toggle device and the supporting means will move later ally inwardly. When this has occurred, the mem bers | 5 of the supporting means will be rotated in a direction opposite to that ?rst described for them, so that the hinge 2| of the binder back is moved downwardly until it reaches the tabletop whereupon the parts I? of the supporting mem bers I5 will be flat or parallel with the tabletop (Fig. 3). This being the position of greatest stability for the supporting means, an unusually firm and non-collapsible support is provided for the leaves 32 during the critical steps of removing leaves from the prongs or impaling leaves thereon. Also if the binder be of the type in which one of the toggle parts may move longitudinally with respect to the other, on its respective hinges, in accordance with the well-known shift type of. binder, a markedly ?rm support is provided for this operation which is usually performed in the position of the binder shown in Fig. 3. Any nor mal weight may be placed upon either'side of the binder in this position without causing the back members l5 to rotate or collapse since the parts 75" 2,129,224 3 counterbalance each other and the squarecorners l8 further resist any turning movement of the members, each comprising an upright portionand a portion angular thereto, the latter portion of supporting members. each member being directed toward the other, a hinge connecting the said latter portions, and ‘ When, for example, a majority of the leaves 32 are ‘all on one side of the binder and it may be desired to remove a large number-of :sheets at one time, this can best be done by spreading the prongs l3, I4 still farther apart to the position. ‘shownin Fig. 4. In this position the toggle device is buck 10 led upwardly to its extreme limit ‘Where normally prong-carrying means in the form of a two-part medially hinged toggle pivoted on both said up rightportions for free movement of the medial hinge, relative angular movement of the sup porting members being responsive to movement of the toggle and the hinge of the supporting 10 upright portions 23 of the toggle device assume a transverse relation substantially in a common plane, this movement requiring‘still further con— traction of the outer edges of the toggle device represented by the hinges 30. This extreme con members being free to buckle on either side of a traction is permitted, ‘by my present improvement, by the fully ?exible connection represented by the hinge 2| between the supporting members 15. In other words, as shownin Fig. 4, the supporting back for relative angular movement of the mem bers,.a set of ‘prongs for each of said members in parallel arrangement, each set of prongs being in dividually pivotally mounted on a longitudinal element l2 consisting of the two .angularly mov able members 15 is permitted to buckle in'the opposite direction to that shown in Fig. 2, so that the hinge 2| is on the opposite side ‘of a- plane passing through the corners i8. ‘As clearlylshown in Fig. 4, the supporting means still remains en axis on said members respectively, and means 20 connected ‘with said prongs serving when one set of prongs is swung‘ upwardly and outwardly with respect ‘to the other set to give said members a slight relative angular movement to cause the medial hinge of the members to move upwardly. 25 tirely stable, however, contrary to what might at ?rst be expected, since what actually happens is that one “of the angular members 15, that is, the the combination with a trough-shape binder back, plane common to the said angular portions. 2. In a loose-leaf binder, the combination in cluding a binder back embodying two supporting members hinged together medially of the binder 15 - 3. .In-‘a loose-leaf binder of the class described, of prong-holding means in the form of a trough one adjacent the largest number of leaves, re 30 mains unmoved and in a ?rm, square position shape toggle device normally nested within the upon the tabletop, thus itself providing the desired rigid support for the side of the binder upon which the greatest weight is sustained; the other corresponding member i5, upon the side of the binder carrying at this time relatively no weight, prising means for supporting the toggle for free movement of the medial hinge, said means in cluding a pair of supporting members carrying the is permitted to rotate on the hinge 2| so that its upper edge, represented by the hinge 3!], follows the movement of the adjacent edge of the toggle device, the other edge of the toggle device being 40 held relatively stationary by the opposite member I5 which remains stationary, it being su?icient, as will be readily understood, that the outer edges of the toggle device have relative movement and it being not necessary that both edges of the toggle device move to permit the buckling of the toggle device as described. A still further advantage may be derived from the position of the parts ~shown in Fig. 4, and that is that when a large number of the sheets are upon one side of the 50 binder as shown in this ?gure, the flatness of the upper sheet may be enhanced by buckling the toggle and supporting member as shown. It will be understood, however, that such extreme buck ling of the parts is not usually necessary as sheets can be readily removed and inserted, and also written upon, with ease and comfort when the parts are in the position shown in Fig. 3. It will be further understood that the cover members 33, which are of stiff construction, ex (30 tend in their full length, to the tabletop 23, and further contribute to providing a flat writing sur face on the leaves. In my co-pending application Serial No. 543, 374, ?led June 10, 1931, I claim broadly the pivot ing of prong holding means on a support at a point apart from the pivot point of the prong back and having a medial hinge, said back com 30 toggle device, hinge connections between the tog gle and said supporting members at their upper 35 outer sides respectively, and a hinge operatively connecting said members medially of the binder back whereby the supporting members are free to move angularly but relatively of the toggle device in response to movements of the medial 40 hinge of the toggle. 4. In a loose-leaf binder, the combination in cluding a binder back embodying two internested normally trough-like elements ?exibly connected at their outer edges, each comprising a pair of 45 right-angular members, each member having rigid portions forming between them a relatively sharp square corner and each element having its respective members hinged together medially of the binder back for free relative angular move 50 ment whereby the elements may be buckled into and out of internested relation and the medial hinges may move in the same or opposite direc tions responsive to relative movements of the said 55 elements. 5. In a loose-leaf binder, the combination in cluding a binder back embodying two internested normally trough-like elements ?exibly connected at their outer edges, each comprising a pair of right-angular members, each member having 60 rigid portions forming between them a relatively sharp square corner and each element having its respective members hinged together medially of the binder back for free relative angular move ment whereby the elements may be buckled into 65 and out of internested relation and the hinges holding means and the binder cover, and in my may move in the same or opposite directions re copending application Serial No. 752,219, ?led November 9, 1934, I claim the pivoting of the sponsive to relative movements of the said ele ments, a set of curved prongs carried by each of the members of the inner element concentrically 70 with the hinge individual thereto, and a cover hinged to each of said members of the inner ele ment. 6. In a loose-leaf device, a jointly trough-shape 70 prong carrying means intermedially to a support whereby the prong carrying means is intermedi ally fulcrumed thereon. Having described my invention, I claim: 1. In a loose-leaf binder, the combination in cluding a binder back embodying two supporting pair of angular directly connected relatively 75 4 angularly 2,129,224 displaceable supporting members, members, at least one of said members having a angularly displaceable sheet-engaging means normally upright portion and another portion ex— tending rigidly toward the other of said members, and a normally trough-shape toggle device nor pivoted to said members at each side thereof, a connection between said means so that movement of the means on one side causes movement of the means on the'other side, said members being angularly adjustable in response to movements of the sheet-engaging means, and a pair of covers one hinged directly to each of the sheet-engaging 10 means apart from the pivots of the said. means on said members. '7. In a loose-leaf device, the combination in cluding a trough-shape binder back comprising two angularly formed back sections pivoted to 15 gether medially of the binder back, and trough shape sheet-engaging means in the form of a two part toggle device hinged at each side to one of mally nested within the supporting members 5 pivotally connected at both sides to said members, said members being automatically angularly ad justable in response to movements of the toggle device. 1 . 9. In a loose-leaf binder of the class: described, 10 the combination with a trough-shape binder back, of prong-holding means in the form of a trough shape toggle device normally nested within the back and having a medial hinge, said back com prising means for supporting the toggle for free 15 movement of the medial hinge, said means in cluding a pair of supporting members carrying the said sections and normally nested therein, said toggle device, hinge connections between the tog toggle device having a medial hinge parallel with gle and said supporting members at their upper the hinge of the back sections, both said hinges outer sides respectively, and a single hinge opera 20. being freely movable transversely of the binder - tively connecting said members whereby the sup back in either direction, and said sections being porting members are free to move angularly but angularly movable in response to movements of the medial hinges. 8. In a loose-leaf device, a jointly trough-shape 25 pair of relatively rotatably connected supporting relatively of the toggle device in response to move ments of the medial hinge of the toggle. 25 ALFRED M. MARTIN.