US778992A - Loose-leaf binder. - Google Patents

Description

No. 778,992. v 1 PATNNTED JAN. 3, 1905.

' o. N. NELSON.

` LOOSE LEAP BINDER.

APPLICATION FILFD DEO. 28, 190.3.

Patented January 3, 1905.

CHARLES R. NELSON, OF CHICAGO, ILLINOIS.

LOOSE-LEAF BINDER.

SPECIFICATION forming part of Letters Patent No. 778,992, datedJanuary 3, 1905.

Application ned Dcember 23,1903. semi No. 186,889.

T all whom, t may concern,.-

Be it known that I, CHARLns R. NELSON, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Loose-Leaf Binders, of which the following is a specification and which are illustrated in the accompanying drawings, forming a part thereof. Y

This invention relates to that type of looseleaf binders in which opposing hooks or impaling-]1)rongs are employed,their points being separable for the purpose of permitting' the insertion and removal of the leaves to be bound together.

rIhe object of the invention is to simplify and cheapen the construction of devices of this character; and it consists, broadly, in a back plate to which the impaling-.prongs are attached, so that they may slide transversely thereto, the sliding movement being accomplished by means of a cam controlled from the end of the back plate and engaging loops in the prongs, all as hereinafter described and as illustrated in the accompanying drawings, in Which- Figure l is a plan view of the inner face of the back plate and of the binding mechanism, the cover-plate for the mechanism being removed. Fig. 2 is a longitudinal vertical section of the same, thecovcr-plate being in place. Figs. 3 and 4 are transverse sections showing the impaling-prongs in dierent positions.

The back plate is preferably of sheet metal, its width being approximately that of the thickness of the completed book and its length being approxi mately equal to the height thereof. The sheet l() is stamped to form transverse channels l1 12, within which the inner ends l5 16 of the impaling-prongs 13 14 are seated, these inner ends being straight and resting upon the bottom of the channel and the outer portions of the prongs being bent backwardly so that the outer ends of the members of each pair are opposed to each other; As the inner ends 16 lie side by side the body portions are offset, as shown in Fig. 2, so as to bring their outer ends into alinement. rI` he impaling-prongs are controlled by means of cams, and I prefer to form these cams ofa single piece of wire 17, doubled upon itself and lying in contact with andr sliding longitudinally upon the back plate 10. The two arms of the cam-wire are bent outwardly, as shown at 18, 19, 20, and 2l, to form the cam portions which engage loops 22 23, formed in the impaling-prongs at the rearward end of their straight portions. At one end the cam-wire is upturned, as shown at Q4, forming a handpiece by which it may be actuated. This cam is held in place and guided by studs 25 26, set in the back plate l0 and projecting upwardl57 between the two arms of the cam-wire, which are spaced apart for their accommodation. In order to form a lock to hold the cam-rod in either of itseXtreme positions, it may be slightly recessed, as shown at 27 28, for engagement of one of the studs, as 25, by reason of the elasticity of the wire. A coverplate 29 is preferably applied to the back plate 10 so as to cover the cam and the inner ends of the impaling-prongs, holding the latter in place. As the cam-rod is moved longitudinallyit necessarily moves the impalingprongs transversely as to the back plate 10, as its inclined or cam portions 18, 19, 20, and 21 slide through the loops 22 and 23, the action being positive both for opening and closing the impaling-prongs.

I claim as my invention-- l. 'In a loose-leaf binder, in combination, a back plate, an impaling -prong having a straight portion in sliding' engagement with the plate and being bent to form a loop and curved upwardly and backwardly, and a cam in sliding engagement with the plate and with the loop of the prong.

2. In a loose-leaf binder, in combination, a back plate, a pair of oppositely-moving impaling-prongs each having a straight portion in sliding engagement with the plate and being bent to form a loop and curved upwardly and backwardly, and a double cam in sliding engagement with the plate, one portion of the cam being in engagement with the loop of each prong'.

3. In aloose-leaf binder, in combination, a back plate, a pair of oppositely-moving imy paling-prongs each having a straight portion IOO and baelzwardly, a double earn in sliding engagement with the plate and formed of a wire redoubleol upon itself and having oppositelyinclined portions, one in engagement with the loop of each prong, and a stud set in the plate between the two arms of the wire and being elastioally engaged thereby.

CHARLES R. NELSON.

Witnesses:

LoUIs K. GILLsoN, E. M. KLATCHER.

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