US893120A - Loose-leaf binder. - Google Patents

Description

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NE EEE- v No. 893,120. PATENTED JULY 14, 190s. j W. M. WHEILDON.

v,LOOSE LEAP BINDER. APPLIOATION'FILL'D MAR'. 21, 1907.

2 SBEBTSLSHEET 2.

LUNITED sTATns PATENT onnion.

WILLIAM M. WHEILDON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO LIBRARY BUREAU, OF BOSTON, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.k

` LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented July 14, 1908.

Y Application led. March 21, 19072 Serial No. 363,581.

juncts of loose leaf books, and consists inl sundry improvements in the clamping backs wherewith the leaves composing such books are bound.

In the drawings hereto annexed which illustrate an embodiment of my invention and im rovements, Figure 1 is an elevation of the c amping book back; Fig. 2 is an end view of portion of the book composed of loose leaves held by the clamping back shown in Fig. l; Fig. 3 is the vertical section of the clamping book back taken on the line 3 3 of Fig. l; Fig. 4 is a detail showing the mode of operation of the releasing key lever; Fig. 5 is a detail showing my improved telescoping' ost and a mode of securing the same to the side plates of the leaf holding clamp; and Fig. 6 is a cross section of one of the said telescopingiosts showing the mode by which a leaf is hel thereby.

Referring to Figs. l, 2 and 3, A is the back plate and B, B the` movable side plates which constitute the principal members of the leaf holding clamp. The back plate A terminates in iianged end plates' A3 which overlap and mask the ends of the side plates B, B. The side plates B B serve for the attachment of the flexible book covers as K seen best in Fig. 2. These side plates are movably connectedto each other by means4 of the tele scoping posts C whereof I have shown three in the drawings. The operating devices which serve to expand or spread the side lates B, B apart, consist in the illustration s own of toggle gear, these being shown composed each of the links G and G pivotally secured to the internal ears B on the side plates B, and by cam studs G2 on the bosses A2 (Fig. 3). The double toggle gear is operated by means of the swinging arm D which is pivoted at D2 on the back plate A and which is provided with socket flanges DV suited to the reception of a key lever presently to be described. A plate E slotted at E so as. to be guided by the studs G2 constitutes the connection between the two sets of toggle gear which are side plates B through the ivoted at G3 to the plate E. A short link I3* pivoted to the rocking arm D at D3 is also ivotally secured to one of the studs G3 whic is made to project from the back of the plate E for the purpose. Thus, when the arm D is rocked one way or the other, the intervening means of the toggle gear will be expanded or brought together, the telescoping posts C opening and closing and assisting to hold the two side lates B, B in proper position and alinement.

Fhe back plate A is slotted at A3 (Fig. 3) so y as to provide an opening for the entrance of a key lever such as J.

`Secure to the back plate A there is provided the ratchet sector F which coperates with a spring controlled pawl II which is pivotally secured to the arm D. The arrangement of this pawl and ratchet is shown in detail in Fig. 4. I provide an operatinghandle, in the specific instance shown in the drawings as the key lever J, which on being inserted through a ro er opening such as the slot A3 in the bac p ate A dislodges the pawl II from its engagement with the ratchet F and thus prepares the internal mechanism for further operation by movement of the handle J.

In the s ecific device shown in the drawings the han le or key lever J is forked at J so as to straddle the pirf D3 and is furnished also with a projection J 2 which is so proportioned that when the key lever J is inserted between the two flanged jaws D the projection J 2 strikes against a pin H upon pawl H. The key lever J or its projection J2,may be so fashioned that the mere act of inserting the key to its place operates to dislodge the pawl II from its hold on the ratchet F, or as indicated in Fig, 4, some further movement of the key lever J may be required as a rocking or tipping movement to the left as shown in Fig. 4, which causes the projection J 2 to press the pawl H out of engagement with the ratchet F. When the releasing or unlocking function of the handle or key lever J has been performed, a further movement of the handle suffices to rock the arm D to the left as shown inFigs. 1 and 4 and thereby slide the plate E longitudinally of the back plate and spread apart the two side plates through the agency o the toggle gear. When leaves have been removed from or added to the assemblage thereof which constitutes Athe book, the two side plates B may be brought together, firmly clamping the mass of leaves. The

usual mode of clamping the leaves is merely to bear down hard on one of the side plates B as the book rests upon a table. The toggle gear collapses, the arm D is swung back and the pawl H cooperating with the ratchet F holds the arm D and the connected mechanism in any position to which it is brought.

In Figs. l, 2 and 3 the binding clamp is shown as partly open, that is to say the side plates B are not as nea'r together as the structure of the telescoping post C and toggle gear permits. The telescoping posts are made up ol' post members C which are precisely alike and interchangeable one with the other. These posts are made each of a strip of sheet metal rolled or bent so that the cross section thereof very nearly approaches the shape of a figure 8. Cne loop of this double convolution is smaller than the other, its external diameter being substantially the same as the internal diameter ol the larger loop and the edge oli the larger loop approaches but does not touch the curved surface ol the post toward which it is bent. In Fig. 5 I have shown one of these posts in elevation and in Fig. 6 the two posts are shown interlocked, one of them being in cross section. The slit left between the terminus of the larger curve of the post member C and the back of the reverse curve is just suflicient to admit the body of the companion post member and by inserting these posts one within the other, causing the smaller convolution of each to enter the larger convolution of the other,

there is provided a telescoping post, several of which, when arranged. as shown in Fig. 1, serve effectively to keep the leaves P in proper alinement. A portion of one of these leaves is shown in Fig. 6 illustrating the manner in which the binding posts C retain the leaves I). To secure the members of the binding posts to the side plates B, I employ rivets, such as L, shown in Figs. 3 and 5.

The operation of the above described leaf holding clamp is easily and quickly performed by inserting the handle J through the slot A and between the jaw llanges D', therewith disengaging the pawl and ratchet and thereafter moving the said plates B apart through the medium of the toggle gear. The slow and comparatively laborious operation of working a screw with a key to open the togglesf-a mode heretofore used-is thus obviated and improved upon and the leaf holding clamp as a whole rendered more convenient than such contrivances have been heretofore.

What I claim and desire to ters Patent is:

1. In a binder for loose leaf books, the combination of a back plate, movable side plates, telescoping posts connecting the side plates, an operating arm, connected to the expanding gear, the expanding gear a detent and its cooperating member, one of these secure by Letstationary in relation to the back plate, the other on the expanding gear operating arm, and means, controlled by a key, to release the detent lrom its cooperating member, to tree the arm lor operating the expanding Y gear.

2. In a binder lor loose leal books, the combination ol a back plate, movable side plates, mechanism lor opening and closing the side plates, and telescoping posts, each consisting ol an intertwined pair otI S-seetioned members, said members being nmtnally interehangeable, one secured to one side plate, the other to the other.

3. In a binder lor loose leal books, the combination of a. back plate, mo 'able side plates, telescoping posts connecting the side plates, expanding gear l'or the side plates, an operating arm pivoted to the back plate, a, sliding middle-plate, connections therewith to the expanding gear and to the operating arm, a rack statimiary with relation to the back plate, a pawl cooperating therewith on the operating arm, and means controllable by a key to release the pawl to lree the arm for operating the expanding gear.

4. In a binder lor loose-leal books, the combination ol a back plate, movable side plates, telescoping posts connecting the side plates, toggle gear for the side plates, operating means lor the toggle gear, comprising a detent and its coolwrating member, one ol these secured. stationary in relation to the` back plate, and means to release they detent and free the toggle gear operating means.

5. In a binder lor loose leal books, the combination ol a back plate, movable side plates, telescoping posts connecting the side plate, toggle gear,for the side. plates, an operating arm, connected to thc toggle gear, a detent and its cooperating member, one ot these stationary in relation to the back plate, the other on the toggle gear operating arm, and means, controlled'by a key, to release the detent from its cooperating member, to lree the arm for operating the toggle gear.

6. In a binder for loose leal books, the combination ol a back plate, movable side plates, telescoping posts connecting the side plates, toggle gear lor the side plates, an operating arm pivotcd to the back plate, a. sliding middle-plate, connections therewith to the toggle gear and to the. operating arm, a rack stationary with relation to the back plate, a pawl cooperating therewith on the (nierating arm, and means controllable by a key tio release the pawl to lree the arm l'or operating the toggle gear.

Signed by me at Boston, l\Iassaclmsetts, this 19th day ol March, 1907.

WTILIJIAM M. WlllClLDON.,

Witnesses:

JOSEPH T. BRENNAN, MARY M. DANinnn.

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