US950614A - Loose-leaf binder. - Google Patents

Description

J. G. DAWSON. LOOSE LEAP BINDER. APPLICATION FILED AUG.11, 1909.

Patented Mar. 1,1910.

Imfen or c/dmes ,DawiW a rigid base plate 13, preferably 0 UNITED STATES PATENT OFFICE.

JAMES G. DAWS N, QF'WEBSTEB GROVES, MISSOURI, AEBIGNOB T0 SIEBER & TRUBSELL MANUFACTURING COMPANY, A CORPORATION OF MISSOURI.

LOOSE-LEAF BINDER.

Specification of Letters Patent.

Patented Mar. 1. 1910.

To all whom it may concern:

Be it known that I, James C. Dawson, a citizen of the United States, and resident of Webster Groves, county of St.Louis, and State of Missouri, 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 thereo The invention relates to loose leaf binders usually made in Small form and commonly known as rice books. The binder mechanism is 0 that type in which mating impaling rongs are carried by a pair of plates which ave their inner edges in contact and are forced together by a sprin whereby a species of toggle action is o tained, the pron -carrying plates being deflected downwar when the prongs are closed and upward when the are open, force being necessary to shift t em from either position to the other.

The object of the invention is to simplify and generally improve binders of this type; and it consists in a structure such as is hereinafter described, and as illustrated in the accompanying drawings, in which- Fi re 1 1s aplan view of the binder showmg the pron s closed, and their positions, when open, in indicated by dotted lines; Fi 2 is a detal transverse sectional view of t e hinder, the prongs being open; Fig. 3 is a detail central longitudinal section through the binder mechanism; Fig. 4 is a detail transverse section, the binder being closed; and Fig. 5 is a erspective of one of the mug-carrying p ates with the prongs attae led thereto.

The binding mechanism is, as usual secured between a pair of side or cover plates 10, 11, and is attached to the back 12 of the book, which is usually a piece of fabric overlapping and secured to the side ilatt-s. A.

i metal, is shown as secured between the back 12 and its lining 14, and is provided with upstanding a crtured lugs 15, 16, adjacent its side odes, l

t lose lugs being arrm'iged in pairs. thcro m ing three pair as shown. The prong-currying plates 17, 18, are located above the plate 13, and each of these plates is provided with downstnnding apcrtured lugs 10, cooperating with the lugs 15 and 1G, and are secured thereto by means of pins 20, 21, which serve as pivots on which the plates may rock. As shown, these pins are substantially of the same length as the plates, each servin as a pivot for uniting t e several pairs 0 lugs 11 on one side of the binder. The inner gcs of the plates 17, 18, abut, and are held in engagement by means of a plurality of buttons 22, fitting loosely within recesses 28 in the plates and being transversely grooved to provide heads above and below the plates.

The prongs 24, three sets of which are shown, are substantially semi-circular in form, their inner ends being rigidly attached to the plates 17 and 18, and their outer ends being of complementary mortise and tenon form so as to interlock when closed together.

A bowed spring plate 25 is located above the plates 17 and 18, its edges being turned inwardly to engage their outer edges, the spring (plate being suitably recessed to accommo ate the prongs. The tension of the spring plate forces the plates 17 and 18 toward each other and causes their deflection either downwardly for the purpose of closing the prongs together, or upwardly for spreading them, these plates pivoting upon the pins 20, 21. As there is necessarily a slight lateral movement of at least one set of the prongcnrrying plates as they swing upon their pivots, one set, as 15, of the lugs rising from the plate 13 is shown as having e ongated pivot apertures. The pron may be opened by gripping the mem ers of any pair and forcing them apart; preferably, however, by pressln the p ates 13 and 25 toward each other. llsually this pressure will be applied by resting the book when open 11 on a desk and bearing down either direct y upon the plate 25 or upon the bound sheets. The pivots of the plates 17, 18, being near their outer edges, the relative movement of the plates 13 and 25 is very small, much less than in the structure forming the subject of another application by myself for mlent and copendin" with thus one. 'Im pron s are closed by pressing together the mom lore of any pair of them.

The construction is simple and clump, while the binder is exceedingly cllicaont.

I claim as my invention 1. In a loose loaf binder, in combination, a base plain-,1: pair oi mung-mrrymg plates iivotul y attached to the bum-flute and uwing their edges abutting, an a spring acting on the prong-carrying plates and tact and each being provided with a set of urginlg them to ether. ldownstanding apertured lugs, a pin unit- 2. n a loose eaf binder, in combination, in cooperating members of each set of lugs, a base late, a pair of prong-carrying plates ivota y attached to the base-plate and aving their edges abutting, one of such pair of plates having lateral play on its pivots, and a spring acting on the prongplates together.

6. In a loose leaf binder, in combination, a base plate having two sets of upstandin apertured lugs, the apertures of one set 0 an a spring urging the prong-carrying carr ing plates and urging them to ether. 3 lugs being elon ated parallel with the base 3. In a loose leaf binder in com ination, i plate, a pair 0 prong-carrying plates hava base late, a pair of pron -carrymg mg their ad scent edges in contact and each plates plvotall attached to the ass-plate i being PI'OVI ed with a set of downstanding and having t en edges abutting, and a apertured lugs, a pin uniting cooperating bowed spring plate covering the prong-cari members of each set of lugs, and a spring rying plates and bearing against their outer I urging the prong-carrying plates together.

edges. I a loose leaf binder, 1n combination, 4. In a loose leaf binder, in combination, a base plate, a pair of prong-carrying plates a base late, a pair of prong'carrying plates related together as toggle arms and each pivotal y attached to the base-plate and havhaving a pivotal engagement with an aping their edges abutting, and a lgrooved but purtenance of the back plate, and a spring ton housed 1n recesses m the ER ]acent edges engagin the prong-carrying plates and of the pair of plates. urging t em toward each other.

5. In a loose leaf binder, in combination, JAMES C. DAWSON.

a base plate having two sets of upstanding \Vitnesses:

' a ertured lugs, a pair of prong-carrying F. \V. BIS UE,

p ates having their adjacent edges in con- Farm. Corrmm.

Images