US2382261A - Slide operated fastener - Google Patents

Description

G; SCHER 2,382,261

SLIDE OPERATED FASTENER- Filed July 5, 1945 FIGS. Fl s4.

INVENTOR. GEORGE SCHER ATTORNEYS Patented Aug. 14, 1945 UNITED STATES PATENT OFFICE SLIDE OPERATED FASTENER George Scher, South Orange, N. J. Application July 5, 1943, Serial No. 493,562

3 Claims.

' provide a slide fastener which will minimize the possibility of catching extraneous material between the slider and the fastener members with resultant jamming of the slider and injury to the material caught thereby. Other objects of the invention will be apparent.

A preferred illustrative embodiment of the invention is shown in the accompanying drawing 7 wherein Figure 1 is a view in elevation of a slide fastener comprising two series of fastener members, each mounted upon a stringer in the usual manner, and a cooperating slider;

Figure 2 is a cross section of the assembled parts shown in Figure 1 on the line 2-2 of said figure looking in the direction of the arrow;

Figures 3 and 4 are respectively front and side elevations of the slider shown in Figure 1;

Figure 5 is a sectional view of the slider as shown in Figure 3 taken on the line 5-5 thereof and looking in the direction of the arrows;

Figures 6, 7 and 8 are respectively a top plan view, an end elevation, and a bottom plan view of a single fastener member before attachment to a stringer, Figure 7 being taken from the side of Figure 6 indicated by the reference line l--'I;

Figures 9 and 10 are respectively a side elevation and a longitudinal section of the fastener member shown in the previous figures;

interiorly, with the result that the fastener members themselves will serve to deflect from contact with the slider any extraneous material which may underlie or overlie the fastener members.

Referring to Figure 1 of the drawing, two stringers I' and 2 of conventional construction are shown. The stringers I and 2 are provided. respectively with beaded edges 3 and l in the usual manner. Uniformly spaced along the beaded edge of each stringer are fastener members 5 which for any given assembly are identical in shape and size. In the accompanying drawings the fastener members are shown in Figure 1 and Figures 6 toll inclusive. Each individual fastener member is provided with ,projections 6 and I forming a jaw adapted to be closed down upon the beaded edge of the stringers I and 2 as shown in Figure 2.

Each individual fastener member is also provided with L- shaped arms 8 and 8, which between them define a centrally located slotted opening to engage appropriately shaped parts of the slider. in a manner to be hereinafter described, and with matching projections and indentations by which one series of fastener memhers is engaged with the other series.

Referring first to Figures 6 to 11 it will be seen that the arms 8 and 9 of each fastener member are provided with integrally formed projections H! and I I which are symmetrically located with respect to the slotted opening defined by the arms 8 and 9 as above described and which together define an arcuate line from one lower corner to the opposite lower corner of the fastener member,

Figure 11 is a sectional view of the three fastener members in locked position and of the type shown in previous figures, the section being taken along the plane indicated by the line II --II of Figure 6.

Slide fasteners of the general type herein shown are usually made up of a number of identical fastener members attached to stringers which in turn'are secured to the edges of material to the center of said are lying in a plane midway between the arms 8 and! as clearly shown in Figure 7. Matching indentations I2 and I3 are formed in the under side of the fastener member, as clearly shown in Figure 8 and indicated by dotted lines in Figures '7, 9 and 10. The inter engagement of the projections and indentations In accordance with the usual practice, a series of fasteners of one type or the other above described may be assembled upon the stringers I of ea posed fastener members. ,of the slider in a downward direction the fastener 1 members will be successively separated from each and 2, properly spaced along the beaded edges thereof and firmly attached thereto by closing the jaws formed by the prongs 6 and 1. Also in ac-- cordance with the usual practice a connecting link It may serve to hold the stringers together at one end and stops I1 and I8 attached to the beads of the stringers may serve to prevent the complete withdrawal of the slider which will now be described.

Referring particularly to Figures 3, 4 and it will be observed that the slider comprises a web l9, two symmetrically arranged and outwardly flaring guide members 20 and 2| which extend outwardly from each side of the web in a plane at right angles thereto, and a wedge shaped block 22 which extends outwardly on both sides of the "web, as well as a lug 23 to which a pivoted handle 24 is attached for easy engagement of the slider by the hand of the operator.

The guide members 20 and 2| and the web 58 are so proportioned, as 'shown in Figure 2, that they will engage with reasonable tolerances the slotted openings 26 in the individual fastener members. Thus as the slider is moved upwardly in Figure l, successive fastener members will be guided into position first from one series and then from the other so" that the projections l0 and II bh fastener member will be brought into engagement with the indentations l2 and I3 of op- By reverse movement other, both by the action of the guide members 20 and 2| and the web shaped block 22.

Inasmuch as the engagement between the slider and each of the fastener. members takes place interiorly of the latter and the slider does not, as is usual, overlie the fastener members, there will be much less opportunity for the slider 'to catch extraneous material and become jammed upon the fastener members.

It will, of course, be understood that the invention may be variously modified and embodied within the scope of the subjoined claims.

I claim as my invention:

1. A slide fastener element including Jaws at its inner end for connecting it with a stringer, a pair of arms extending toward the opposite end of said fastener element and defining a slotted opening for engagement bythe slider, saidarms being shaped to reduce the width of the slot at the forward ends of the arms, top surfaces on the arms and at substantially the same height on opposite sides of the slot, bottom surfaces on the arms under said top surfaces, a projection on the top surface of each arm, aligned indentations on the bottom surfaces of the arms forming in effect a single indentation that extends on both sides of the slot for engaging the projections of an oppositely disposed fastener member, the projections being spaced and shaped toengage the indentations at points separated by a distance greater than the width of the slot that separates thefastener element and defining a slotted opening forv engagement by the slider, said arms being shaped to reduce the'width of the slot at the forward ends of the arms, top surfaces on the arms and at substantially the same height on opposite sides of the slot, bottom surfaces on the arms under said top surfaces, a projection on the top surface of each arm, aligned indentations on thebottom surfaces of the arms forming in effect. a single indentation that extendspngboth sidesot the slot and provides a bottom engagement bearing for contact with a complementary top engagement bearing provided by the projections on the top surface of a similar but oppositely disposed adjacent fastener member immediately below, at least one of the engagement bearings of the fastener member having a center of curvature on an axis that extends substantially parallel to said arms and that is located below the slot that separates the forward end portions of said arms.

GEORGE SCHER.

Images