US1915536A - Slide fastener - Google Patents

Description

June 27, 1933. G. JOHNSON 1,915,536

SLIDE FASTENER Filed Dec. 8, 1931 Patented June 27, 1933 UNITED STATES PATENT OFFICE GUSTAV JOHNSON, OF WEST ROXIBUBY, MASSACHUSETTS, ASSIGNOR TO UNITED-CARR FASTENER CORPORATION, CAMBRIDGE, MASSACHUSETTS, A CORPORATION 01' MASSACHUSETTS SLIDE FASTENER Application filed December 8, 1931. Serial No. 579,695.

My invention aims to provide improvements in sliders for multiple operated fastener installations.

In the drawing which illustrates preferred embodiments of my invention Figure 1 is a plan view ofa portion of a multiple operated fastener installation showing my improved slider;

Fig. 2 is a section taken on the line 2-2 of Figure 1 showing the sllder 1n locked position;

' Fig. 3 is a section similar to that shown 1n Fig. 2, but showing the slider 1n unlocked position;

Fig.4 is a section taken on the l ne 4-4 of Figure 1 to show the construction of the pivot bar and the locking means; and

Fig. 5 is a side elevation of my lmproved slider member formed from sheet metal and with a portion thereof broken away to show the construction.

Referring to the drawing which illustrates my invention, I have shown improved sllden constructions for use in connection wlth multiple operated fastening installations. In Figs. 1 through 4 I have shown the sllder as being cast from a single piece of metal and in Fig. 5 I have shown the sllder as it may be formed from a single piece of sheet metal.

My invention relates more particular to the construction of the bar on the slider to which the pull tab is hinged and also to the means for locking the slider in any desired osition along the opposed -ser1es of fastening elements. Therefore, I shall not attempt further to distinguish between the cast metal slider and the sheet metal slider since both have similar elements for accomplishlng the desired results.

Myimproved slider members each have a top plate portion 1, a bottom plate portion 2 and means 3 located between the plate portions adjacent to one end to space the plate portions apart, to connect them together n, predetermined relation, and to provide in effect diverging channels for efiectmg engagement and disengagement of the fastening elements 4 secured to the opposed edges of the stringers 5. Each of the plate members 1 and 2 (Fig. 4) has side flanges 6 extending toward the side flanges of the other part but being spaced from each other in the usual manner to pass over the stringers while holding the slider in assembled relation as it is moved to and fro along the fastening elements 4. In order to facilitate sliding movement of the slider, I have provided a pull tab 7 which, instead of being attached preferably formed by pressing a part of the material of the top plate outwardly and then suitably forming the material to provide a rounded portion in cross-section, as clearly illustrated in Figs. 2 and 3. After the bar 8 has been formed apertures 9 and 10 are provided in the plate portion 1 ateach side of the bar. One .end of the. pull tab is provided with a loop portion 11 which encompasses the curved portion of the bar 8, thereby attaching the pull tab 7 to the slider in pivoted relation thereto.

In many multiple operated fastener installations it is desirable to provide means whereby the slider may be located in any desired position along the fastener elements. I have provided a simple and efficient locking means by pressing from the loop portion 11 a projection 12 which is adapted to engage the fastening members 4 either frictionall or between two of them when the pull ta is moved to a predetermined position such, for instance, as shown in Fig. 2.

I have found that there are at least two distinct advantages in pivoting the pull tab member 7 substantially centrally of the top plate. In the first place, the slider may be moved easily in either direction by holding the tab at substantially a right angle to the slider. In the second place, the projection 12 will enter through the aperture 10 in the top plate 1 and engage the fastening elements 4 at a point where they are being separated from each other, thereby permitting the projection 12 actually to engage between the fastening elements rather than to press against them. With this arrangement any lateral stresses exerted upon the stringers U tending to separate the fasteners will exert an u ward stress against the rojection 12, there y tending to hold the pull tab in locked position, as shown in Fig. 2.

The operation of my device is simple and locking is more or less automatic since in order to move the slider along the fastening elements the pull tab must be moved from a position shown in Fig. 2 to a position shown in Fi 3, or a more right angled position if desira le, thereby movin the projection 12 from the ath of the astenin elements. When the s ider is moved to the esiredposition it is merely necessary to press the pull tab 7 back into the position shown in Fig. 2 and that action swings the projection 12 through the aperture 10 in the plate 1 into engagement with the fastener members 4, as shown in Figs. 1 and 4.

My invention is simple and durable in construction and is reduced to a minimum number of parts the construction and assembl of which is relatively inexpensive.

V'hile I haveillustrated and described referred embodiments of my invention do not wish to be limited thereby, because the sec of my invention is best defined by the fol owing claims.

I claim: 1. A slider for multiple operated fastener installations havin a top portion and a bottom portion spac apart to permit the passage of opposed series of fastener elements, means located between said portions for guiding the fastener elements of one series into interlockin engagement with the -o posed series and %or disengaging them as esired, an integral bar" formed from one of said portions, t e longitudinal axis of said bar extending transverselyacross the portion from which it is formed, a slide-operating tab having a loop portion surrounding thesaid bar thereby to constitute with said bara hin e for said tab, said portion from which said integral bar is formed having an aperture therein adjacent to said bar and a projection tending transversely across the portion from which it is formed, a slide-o erating tab having a loop portion surroun in the said bar thereby to constitute with sai bar a hinge for said tab and a projection extending from said loop portion for engagement with the fastener elements in one position of the tab thereby to lock the slider in a given position with relation to the fastener members, and said portion having said bar also having an aperture adjacent to said bar to permit said rejection to be entered into and removed rom the space between said front and back portions b pivotal movement of said tab.

3. A sli e fastener device of the class described having a top plate portion 1, a bottom plate portion 2, means 3 spacing said top and bottom plate ortions from each other to permit passage 0 o posed series of fas-v tener elements through t e. device, a hinge bar 8 integral with the to plate portion 1 and having its longitu'dinaFaxis extending transversely across the top, plate portion 1 about midway between the ends of the device, a pull ta member 7 having a loop rtion 11 encompassing said bar 8 to provi e for pivotal movement of the tab 7 relative to the plate ortion 1, an aperture 10 formed in the top p ate portion 1 adjacent to said bar 8 and an integral projection 12 formed in said loop portion 11 and adapted to pass through the aperture 10 and intersect the passage between said plate portions 1 and 2 as and for the purposes illustrated and described.

In testimony whereof, I have signed my name tothis specification.

GUSTAV JOHNSON.

extending from said loop portion-through the I said a erture for engagement with the fastener e ements in one position of the tab thereby to lock the slider in a given position with relation to the fastener members.

2. A slider for multiple operated fastener installations having a top portion and a bottom portion spaced apart to permit the passage of opposed series of fastener elements, means located between said portions for iding the fastener elements of one series into interlocking en agement with the opposed series and for isengaging them as desired, an integral bar formed from one of said portions, the ongitudinal axis of said bar ex-

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