US2051617A

US2051617A - Loose leaf binder

Info

Publication number: US2051617A
Application number: US1458A
Authority: US
Inventors: George W Newman
Original assignee: LOOSE LEAF METALS CO
Current assignee: LOOSE LEAF METALS CO
Priority date: 1935-01-12
Filing date: 1935-01-12
Publication date: 1936-08-18
Anticipated expiration: 1953-08-18

Description

Patented Aug. 18, 1936 2,051,617 LoosE LEAF BINDER George W. Newman, St. Louis, Mo., assignor to Loose Leaf Metals Company, a corporation of Missouri Application January 12, 1935, Serial No. 1,458

3 Claims.

The invention relates to loose leaf binders of the type in which mating sheet carrying arches are supported by a pair of toggle elements, controlled by spring means.

'Ihe object of the invention is to provide improved means for limiting the action of the toggle joint; and it consists in providing the toggle elements with intertting ribs and grooves, one orv both of them being provided with a projecting and outwardly inclined marginal flange or lip overlapping a face of the companion element and limiting the range of movement of the toggle.

In the accompanying drawing:

Fig. 1 is a perspective view of a binder embodying the invention; and

Fig. 2 is an end view thereof.

While I have shown two forms in which the invention may be embodied, it may be given other t forms, and though I have shown only toggle elements in the form of plates, other forms may be employed, as the invention pertains to the engaging margins of the toggle elements and is not concerned with the character of their body portions.

The binder as illustrated comprises a pair of toggle plates I8, II, each carrying toggle arches I2, I3, arranged in mating pairs. The plates I0, I I, are clamped together by means of a spring arch plate I4, the margins of Which overlap the outer edges of the toggle plates. As thus far described the binder is of known construction.

In such binders it is necessary that the outward exing of the toggle elements be limited and there are advantages in having means, other than the meeting of the arch elements, for limiting the' inward flexure of the toggle. Numerous forms of limiting means have heretofore been provided, but they are quite expensive of manufacture and have other disadvantages.

In the present invention the toggle elements are so interengaged that integral limiting means are provided.

In the preferred form of construction, illustrated in Figs. 1 and 2, the inner or meeting edges of the two plates I Il, I I, are of identical form, each being longitudinally channeled, and consequently have tongue and groove engagement. One of the tongues or ribs of each of the plates, as shown at I5, I6, is short, these two short ribs serving as hinge journals. The companion ribs, as I 1, I8,

each project as a flange a substantial distance from the inner margin of the plate, and are eachY inclined outwardly from the plane of the corresponding plate, are on opposite sides of the toggle, and limit the extent to which the joint may be 5 exed.

As shown in Fig. 2, the lower flange I8 on the plate I0 comes into engagement with the lower face of the companion plate II when the arches are opened, thus limiting the opening movement 10 and preventing the disassembling ofthe parts of the binder by the action of the spring plate. As shown in Fig. 1, the upper flange I1 comes into engagement with the upper face of the plate I0 when the arches,l are closed, relieving the latter in l5 part of the duty of resisting the spring compress1on.

The two toggle plates are identical in form.Y They are shaped up by a suitable machine, and may be formed in long strips and then cut to2@ suitable length. In assembling, one plate of a pair is overturned endwise. The exure of the joint is limited by the engagement of the projecting flange of one plate with the face of the other plate, and the interlocking of the two shorter ribs. 25

1. In a loose leaf binder, in combination, a pair of toggle plates having intertting margin ribs and grooves, one of the plates having a forwardly projecting and outwardly inclined flange overlappingthe companion plate, mating prongs carried by the plates, and spring means clampingrthe plates together.

2. In a loose leaf binder, in combination, a pair of toggle plates having intertting margin ribs and grooves, each of the plates having a Vforwardly Vprojecting and outwardly inclined iiange overlapping the companion plate, mating prongs carried by the plates, and spring means clamping the plates together.

3. In a loose leaf binder, in combination, a pair of edge to edge mating toggle plates each having a marginal V-groove anda short rib intertting with the groove of the companion plate and an elongated rib overlapping the companion plate, the elongatedV ribs being oppositely disposed, mating arch prongs carried by the plates, and a bowed spring for clamping the plates together.

GEORGE W. NEWMAN. 5o