US1896840A - Loose leaf binder - Google Patents

Description

Feb. 7, 1933. J. C. DAWSQN 1,896,840

LOOSE LEAF BINDER Filed April 29, v1931 fa/nes C. azwswb.

Patented Feb. 7, 17933 UNITED s'lxrss PATENT o1-FICE JAMES o. DAWsoN, oF WEBSTER GRovEs, MISSOURI, Ass'IGNoR ro ELMA N. DAWSON, on .I

WEBSTER GRovEs, `lvrIssoUnr y LOOSE LEAF BINDER Application med April 29,

adapted to loose leaf binders of the wire arch frame type. Y I

Other objects and advantages will appear from the specification and the appended drawing in which- I Fig. 1 illustrates in perspective the loose leaf binder;

Fig. 2 is a bottom plan view of a wire arch frame loose leaf binder fitted with booster levers of a type which are herein proposed;

Fig. 3 is a vertical section through one end of the loose leaf binder on the line 3-3 of Fig. 2; y

Fig. 4 is a vertical transverse section through the loose leaf binder on the line 4-4 of Fig. 3; V

Fig. 5 is a bottom plan view illustrating the alternative form of booster llever as applied to binders of the wire arch frame type; Y

Fig. 6 is a vertical lngitudinal section through one end of a binder showing a further modified form of booster lever;

Fig. 7 is a transversevertical section on the line 7-7 of Fig. 6; n

Fig. 8 is a vertical longitudinal section through the end of a loose leaf binder illustrating a still further modification of the booster lever; and

Fig. 9 is a transverse vertical section on the line 9-9 of Fig. 8.

The b inder, generally indicated by 10, comprises a fabric orcardboard cover 11, to which is attached by any means the metal binding element 12. The cover 13 is a channel section having a crowned or arched web 14, and two vertical marginal iianges 15 and 16. Articulated wire arch frames 17 and 18 are retained within the cover and their ends,

which project therethrough, terminate in the mating pairs of paper- holding prongs 19 and 21. A third pair of paper-holding prongs 22 and 23 may be affixed to the frames 17 and 18, if desired.

As best indicated in Fig. 2, a pin or rivet 24 is set through the flanges 15 and 16 adj acent the ends of the binder to support and,

1931. Serial'No. 533,716.

form alfulcrum for the booster lever 25 which Y.bea-rs the lugs 26,26 adapted toreceive; the

pin. The inner end 27 ofthe booster lever, is

`arranged topress against the arch frames 17 and 18 andto'lift them, while ythe outer end 28 terminates in the thumb piece 29V which extends beyond thecover. l The booster lever is prevented from mov- ,ing sidewise o-nthe pin by the end vwall'31 ,of

the cover, which' is cut away at 32 only enough to give the necessary. clearance. f

`An alternative form of lever may be as shown in Fig. 5. In this form the booster lever is `provided with integral Vtrunnions 33, 33 vwhich-in effect form af pinpivoted in the holes 34C,k 34 punched through flanges In Fig. 6,7the booster lever 35 mayA be `formed iwith the transverse rib 36 which. fits over the rivet or pin 240. After the rivet is put in 'place7 it is impossible to displace soy .zo y

the booster lever, since-its `upper surface 37 engages the webr1ll0 as shown in Fig. 7.

Lugs may be provided on the booster lever as shown in Fig.l 8. These comprise two integral projections 38'which fit over and engage the transverse pin41. To prevent the booster lever from being displaced after the pin has been put in position, its central l ortion may be bumped up as shown at 39. hisz engages the weband prevents the lever from coming loose.

Another common loose leaf binder has inturned instead of vertical margins or anges It can well be appreciated that the angular positionr of the flanges with respect to the web is of negligible importance and that the form of booster lever and booster lever support herein illustrated is equally applicable to binders of the nturned flange type. y

What I claim, therefore, is: v

1. AIn a loose leaf binder, a cover plate having marginal flanges, a pair of articulated toggle elements retained therein bearing mating pairs of paper-holding prongs extending v through the plate, a pin forming a fulcrum` extending between the flanges and a booster lever pivotally mounted by the pin and adapted to lift the toggle elements.

form of wire arch frame l lturned-marginal portions, a pair of articu- 2. In a loose leaf binder, a cover plate having a web and marginal flanges, articulated toggle elements bearing mating pairs of paper-holding prongs maintained within the cover, land a booster lever having integral trunnions engaging the flanges extending beneath the web Vand adapted to lift the toggle i elements. f

3. In a loose leaf binder, a cover plate having aweb and'marginal flanges, articulated toggle elements maintained therein bearing mating pairs of paper-holding prongs, a pin extending between the flanges forming a fulcrum for a booster leverYV and a booster lever bearing llugsto engage the pin adapted to engage the toggle elements vand to .lift them and retainedagainst displacement by the engagement ofitslfupper ysurfacewith the web.

4; In a loose leaf-binder, an arched cover plate withthe crown up havingdownwardly lated elements bearing mating pairs of paperholding prongs, a booster lever extending ber neath and pivoted upon the marginal portions of the cover plate and adapted to engage the articulated elementsl and to lift them.

' 5. In a loose leafbinder, a cover plate having down-turned marginal portions, a pair of articulated toggle elements therein, and a pivoted booster lever supported upon the down-turned marginal portions of the cover plate and adapted to engage Vthe toggle ele- -ments and to lift them.

Iny testimony whereof I aflix my signature. p

V,JAMES f C. DAWSON.'

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