US2190609A - Slide fastener - Google Patents

Description

Feb 13, 1940.

' H. L. FARNSTROM 2,190,609

SLIDE FASTENER Original Filed April 5, 1957 In n- I N V EN TOR.

Harry Farnslmm ORNEYS. Y

Patented Feb. 13, 1940 2 190 09 UNITED STATES PATENT OFFICE suns FA STENER Barry L. Farnstrom, Erie, Pa., .asslgnor to Talon,

Inc., a corporation of Pennsylvania Application April 3, 1937, Serial No. 134,878

Renewed September 22, 1939 3 Claims. (Cl. 24-205) My invention relates to slide fasteners and tener elements are engaged and disengaged with particularly to means for holding the slider in each other by a slider IS. The slider comprises the closed position. upper and lower wing portions l4, I5 respectively In the application of slide fasteners to founconnected together at one end by a narrow neck 5 dation garments, trouser flies, skirt plackets, and portion It, the wing portions having inturned 5 other garments, it is usual to provide sliders with flanges ll at their outer edges to define a Y- locking or retaining devices. Such sliders are shaped interior channel. commonly called lock sliders and ordinarily'de- In order to limit the closing movement of the pend for their unlocking upon the lifting of the slider, I provide the stringer connecting mempull tab. It often happens that the wearer of hers I! at the upper end of the fastener, at- 10 the garment tries to tear open the fastener, thus tached one to each stringer adjacent the end of placing a heavy stress on the locking device. If the series of fastener elements. These members a pin lock slider, for example, is used, such have opposite laterally projecting hook-like porstresses may cause the pin to slip out of locktions it on their upper ends, which are adapted 1 ing engagement with the fastener elements. or to engage with each other to hold the stop memmisplace the elements along the stringer. ber together when the slider is moved to the up- According to my invention, there is provided per end of the fastener to the closed position. at the top end of the fastener a separable con- The projecting hook-like portions l9 have bevnection between the stringers which will resist eled faces 2| which are adapted to slide over each the tearing stresses. In this manner no tearing other to bring the hook portions into engagement action can come upon the slider and aocordwhen the slider is moved to its fully closed posiingly, there is no tendency for the slider to slip tion.

along the stringers and no need for any lock The lower extending portions 20 of the memslider. Preferably the separable connection opbets are adapted to enter the slider channel, one

erates automatically when the slider is moved to on each side of the neck portion and are wide fully closed position to fasten itself, but which enough to'substantially fill the channel at the requires a deliberate unfastening before the slider upper end of the slider. The members may have can be moved to open the fastener. knurled surfaces as at 22 for easy manipulation I am aware of the fact that buttons and hooks in opening.

have been employed to accomplish, in a measure, It will be noted that when the slider is moved so this same general purpose, but in my improved to the closed position, the members enter the fastener the fastening parts are carried directly slider channel and the inner surfaces of the by the fastener stringers, thereby requiring no flanges ll of the slider act on the outside edges special construction of the garment itself. Furof'the members tending to automatically cam.

thermore, they operate automatically to fasten the members inwardly together around the neck themselves upon pulling up the slider. portion of the slider, and the hook-like portions In the accompanying drawing, I have shown I! of the members ride over each other to com for the purposes of illustration, one embodiment nect them automatically together. When the which my invention may assume in practice. In members l8 are connected together, the slider the drawing: entering portions engage under the neck to pre- Fig. 1 is a plan view of the upper end of a. vent the slider movement until the hooks have fastener combination in accordance with my inbeen manually disconnected. When it is desired vention showing my improved slider retaining to open the fastener the hook-like members are' device in open position; twisted out of engagement as shown in Fig. 4,

Fig. 2 is a detail sectional view showing the and the slider moved in the opening direction.

parts in locked position; While I have shown and described in this ap- Fig. 3 is an end view of Fig. 2; and plication, one embodiment which my invention Fig. 4 is a top view of the retaining members may assume in practice, it will be understood showing them being disengaged from each other that this embodiment is merely for the purposes for opening the fastener. of illustration and description, and that other? The fastener illustrated is a conventional type forms may be devised within the scope of my inof slide fastener, and comprises a pair of flexible vention 'as set forth in the appended claims. stringers l0. ll having attached to their ad- What I claim as my invention is: jacent longitudinal edges cooperating series of 1. In a slide fastener, a pair of stringers hav- 3 spaced fastener elements II. The series of fasing spaced fastener elements along their adjacent edges, a slider movable along said elements for opening and closing the fastener, said slider having an interior channel with two branches diver ing t an acute angle at the top of the slider, and a pair of top stops one attached to each stringer, each of the top stops having a portion of substantially the same length and shape as one of said diverging branches, the adjacent corners of the stops when inserted in said branches being bevelled so as to abut against one another, each of the top stop members also having a hook-like portion which extends at an acute angle to the other portion and of suilicient length to overlap the hook-like portion on the opposite stop member over the top of the slider, said hooklike portions having interengaging means to hold them together.

2. In a slide fastener, a pair of stringers having spaced fastener elements along their adjacent edges, a slider movable along said elements for opening and closing the fastener, said slider having an interior channel with two branches diverging at an acute angle at the top of the slider, and a pair of top stops one attached to each stringer, each of the top stops having a portion of substantially the same length and shape as one of said diverging branches, the adjacent corners of the stops when inserted in said branches being bevelled so as to abut against one another, said top stops having similarly shaped hook-like portions extending toward one another over the top of the slider, the ends of said booklike members being oppositely bevelled to permit them to slide over one another and automatically hook together when the slider is pulled into closed position.

3. In a slide fastener, a pair of stringers having spaced fastener elements along their adjacent edges, a slider movable along said elements for opening and closing the fastener, said slider having an interior channel with two branches diverging at an acute angle at the top of the slider, the slider having a central neck spreading the diverging branches at the top of the slider, and a pair of top stops each of which has an attaching portion of substantially the same size and shape as one of said diverging branches and having a loose fit therein, and interengaging portions extending from said attaching portions toward each other over the slider into overlapping relation, said interengaging portions having cooperating projections and recesses on their adjacent overlapping faces, the overlappingends of said interengaging portions being adapted to be spread apart by relative twisting movement of the attaching portions in the slider channel to disengage said projections and recesses, the attaching portions engaging under the slider neck to hold the slider in position when said projections and recesses are engaged.

HARRY L. FARNS'I'ROM.

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