US2588648A - Separable slide fastener - Google Patents

Description

Filed March 28, 1946 2 SHEETS-SHEET 1 FIG. 3

FIEI

I: I 5 INVENTOR.

01m J. MOQHLQF BY ATTORNEYS March 11, 1952 MQEHLER SEPARABLE SLIDE FASTENER 2 SHEETSSHEET 2 Filed March 28, 1946 I Illllllll FIELIO FIEELQ FIG.

A l 1 s IN VEN TOR.

OTTO J. Morzhlzr ATTORNEYS Patented Mar. 11, 1952 SEPARABLE SLIDE FASTENER Otto J. Moehler, Newark, N. J assignor to Conmar Products Corporation, Newark, N. 1., a corporation of New Jersey Application March 28, 1946, Serial No. 657,659

17 Claims.

This invention relates to separable slide fasteners, and more particularly to such a fastener which will not mesh at all rather than mismesh.

Fully separable slide fasteners are made in large numbers for use in garments such as sweaters, Windbreakers, etc. Such separable slide fasteners usually have a pin at the lower end of one of the stringers and a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin. The primary object of the present invention is to generally improve separable slide fasteners of this character.

' If the pin is not inserted fully into the socket when the slider is raised, the interlockable elements of the stringers may be meshed, but in ofiset relation, so that the pin may escape from the socket, thus permitting the fastener to open beneath the slider, with attendant inconvenience and difficulty. In an effort to prevent this difiiculty, so-called anti-mismesh fasteners have been made in which the pin or the stringer carrying the pin is provided with blocking means so dimensioned that when the blocking means bear against the elements on the opposite stringer the slider cannot be raised. However, there is a wedging action which may cause the slider to jam, with resulting difficulty in again lowering the slider. In some cases the wedging action is such that under a strong pull the slider may be pulled past the blocking means, whereupon the fastener will be closed but may open beneath the slider.

One object of the present invention is to provide an anti-mismesh separable slide fastener which will overcome the foregoing difiiculty. Instead of attempting to block the slider against upward movement, the slider is permitted to be raised freely, but the pin and its stringer are raised with the slider if the pin has not been inserted fully into the socket. The user immediately notices. that one-half of the garment is being raised by the slider, and thereupon again inserts the pin in the socket, but more carefully. Wedging of the slider into immovable position is avoided, and there is no likelihood of the slider being forced past the pin by a strong pull.

In a separable slide fastener having a relatively short pin, the pin may become disengaged from the socket even if the fastener elements are properly meshed, and a further object of the present invention is to overcome this difficulty. Although this feature of the invention is here illustrated as applied to an anti-mismesh slide fastener, it may be used with an ordinary sep 2 arable slide fastener not having the anti-mismesh feature.

To accomplish the foregoing general objects, and other more specific objects which will hereinafter appear, my invention resides in the separable slide fastener parts and their relation one to the other, as are hereinafter more particularly described in the specification, and sought to be defined in the claims. The specification is accompanied by drawings, in which:

Fig. 1 is aplan view of the lower end Of a separable slide fastener embodying features of the present invention, with the pin not yet passed through the slider into the socket;

Fig. 2 is a section drawn to enlarged scale and taken through the pin, approximately in the plane of the line 2-2 of Fig. 1;

Fig. 3 is a view similar to Fig. 1 but showing the pin properly inserted in the socket;

Fig. 4 is a horizontal section taken approximately in the plane of the line 4-4 of Fig. 3;

- Fig. 5 is a View similar to Fig. 3, but with the front wall of the bottom stop cut away and with the pin not fully inserted in the socket, thereby tending to cause mismesh;

Fig. 6 is a view similar to Fig. 3, but illustrating how subsequent upward movement of the slider raises the pin and its stringer with the slider;

Fi 7 illustrates a modification of the invention with the .pin improperly inserted in the socket;

Fig. 8 shows the subsequent action of the slider in raising the pin and its stringer;

Fig. 9 illustrates still another modification of the invention, with the pin insufiiciently inserted in the socket;

Fig. 10 is a view similar to Fig. 9 but showing the pin fully inserted in the socket; and

Fig. 11 defines certain dimensions, the interrelation of which is explained in the detailed specification.

Referringto the drawing, and more particularly to Figs. 1 and 2, the separable slide fastener of my invention comprises stringers l2 and I4 carrying interlockable fastener elements l6 and I8 respectively, and a slider 20 having a pull 22 for raising or lowering the slider in order to mesh or unmesh the elements. The stringer I4 has a pin 24 at its lower end, and the stringer l2 has a bottom stop 26 which includes a socket for receiving the pin. Now in accordance with the present invention the pin 24 has a projection 30 extending outwardly, and this projection is so dimensioned and shaped that if the pin is inserted fully in the socket, as shown in Fig. 3, the

slider is readily moved upward, but if the pin is not inserted fully in the socket, as shown in Fig. 5, the upward movement of the slider carries the pin and its stringer upwardly, as shown in Fig. 6, without meshing the interlockable elements [6 and (8.

For cqnvenience, the projection vElll takes the form of a pair fof e'ars formed integrally with the sides of the'pin and projecting outwardly collaterally of the tape, as is best shown in Fig. 2. This view also shows how the pin is bent inwardly around the cords and against the tape, and is provided with serrations 25 to bite into the tape. The ears 3!] may be formed by not bending the metal in at that point. "The" ears may be thickened to contact the tape, as by making them longer and bending the ends inwardly, or even reversely bending the excess length not only inwardly but back toward -the cords of the tape.

If the pin is die cast the ears may readily be made thick enough-to bear against the tape.

The particular type of bottom stop here illustrated comprises a stud '32 which is made of sheet metal and clamped around the corded edge ofthe'tape, much as is the case with pin 24, but the stud 32 is permanently secured within the housing or clip26 of the bottomstop. This clip may be made by rolling metal-to double channel shape; cutting therolled strip into short lengths, and bending each" length to U-shape, with the stud 32 clamped therebetween, as indicated in Fig. 4; To'help lock the stud and clip together, the stud maybe recessed, as shown at 34 (Fig. 5), and one ormoretongues 36 may be struck inwardly from the sides of the clip, as is best shown in'Figsxlg'iaand 5. The other side of the clip provides a cavity for freely receiving the pin 24, as shown in Fig: 4; It will be understood that the clip 26 may, ifdesired, be die cast around the stud 32,01 any other equivalent construction may be employed which will provide the stringer [2 with a bottom stop to limit down movement of the slider, and which bottom stop has a cavity for receivingthepin 2 4;

For proper operation ofthe present invention the pin "shc'nildbeiiaLrrow enough to be received together nastier elements through the slider channel, but the width of the fastener at the ears must be toolarge to pass through the slider channel. This requirement may be explained with reference to Fig. 11 of the drawing. The length of an element plus the width of the pin, that is, the dimension a in Fig. ll'must be less than (1', the width of the slider channel. However, the length of an element plus the width of the pin at the ears, that is, the dimension 1) in Fig. 11, must be greater than the width 12 of the slider channel. The width of the fastener, including the ears, when the pin is properly and fullyinserted in the socket, that is, the dimension c in Fig. 11, should be at least a'little less than the width d of the slider channel, so that the slider is readily raised when'the pin is inserted fully-in the socket. This is true even though the ears project outwardly from the cord further than the jaws of the elements,as will be seen in Fig. 1. In Fig. 11 the cars do not project because the pin 24 is held close to the stud 32, and bends the cord inward at 10.

Fiss .-7 and 8 illustrate a modification of the invention, in which the slider 40 has a seat 42 for receiving the projection 30 when the pin 24 is not, inserted fully into the socket. In the particulal 356 here illustratfidv the projection 30 consists of a pair of ears as previously described,

4 and the slider 48 has a pair of mating seats 42, one seat being formed in each of the divergent flanges at the side of the slider. The seats or notches 42 preferably mate with the ears 30, and in best form the bottom of the notch is parallel to the bottom of the ear, and the latter is substantially perpendicular to the pin, so that there is a direct upward pull by the slider on the pin, thus pulling the pin up alongside the ends of the elements M of the stringer 46, as shown in Fig. 8. It will be understood that when the pin is fully inserted inthe socket, the ears 30 are brought below the seats 42, and there is no interference with upward movement of the slider and proper meshing of the fastener elements.

In separable slide fasteners, if the pin is freely received in the socket, it may tend to work upward and outward alongside the lowermost elements on the other stringer, even when the fastener has been closed in proper mesh. If subjected to a pull, the pin may escape from the socket and the fastener will open beneath the slider. Figs. 9 and 10 of the drawing illustrate means to avoid this. Specifically, the upper end of the bottom stop or socket 50 has a fulcrum '32 for caring against the outside of the pin, and the lower end of the socket has a cam projection for bearing against the inside of the pin. As the pin is pushed home fully into the socket, it is tilted from the position shown in Fig. 9 to the position shown in Fig. 10, at which time the upper end of the pin is nearer the opposite stringer than the lower end of the pin and the fastener element adjacent the upper end of the pin' is held close to the adjacent fastener element on the opposite stringer. against accidental opening of the fastener beneath the slider, because it prevents the upper end of the pin from getting outside the fastener element 58, or in the position shown in Fig. 9.

As so far described, this feature of the invention might be used with a separable slide fastener not provided with the anti-mismesh construction described in connection with Figs. 1

- through 8. However, the improvement is of particular advantage with the anti-mismesh construction here described, and this will be clear from comparison of Figs. 9 and 10, for it will be seen that the tilting action of cam 54 about fulcrum 52 rapidly swings the ears 30 well out from the mating seats or notches 5-2.

It will be understood that the cam 54 here shown on the stud 58, may instead be formed asa part of the clip which is clamped around-the stud. Functionally, the stud and clip may be considered a unitary bottom stop having a socket for the pin, and from this viewpoint it may be said that it is the socket which is provided with both the fulcrum and the cam.

It is believed that the construction and operation of my invention, as well as the advantages thereof, will be apparent from the foregoing detailed description. In operation, if the slider-is at the bottom and the pin is fully inserted, as shown in Fig. 3 or Fig. 10, the slider is readily raised and the fastener elements are properly meshed. If the slider is at the bottom stop and the pin is only partially inserted, andthe slider is moved up with one hand while holding the bottom stop (or the side of the garment carrying the bottom stop) with the other hand, the pin and its side of the garment simply rise with the slider. The same is true and exactly the same result follows if the difiiculty arises from the fact that the slider is not down to the bottomstop This ensures (see Fig. 6) at the time the pin is inserted through the slider.

If the slider is at the bottom stop and the pin is only partially inserted, and the pin (or the side I of the garment carrying the pin) is held with one hand while the slider is pulled up with the other hand, the pin moves on into the socket and the fastener is properly closed. If the slider is not at the bottom stop and the pin is inserted in the slider and the pin (or the side of the garment carrying the pin) is held while the slider is pulled upwardly, the slider and pin remain together without a movement relative to each other, and the garment cannot be properly closed' unless both hands move downwardly together relative to the bottom stop, in which case the pin may fit itself in the bottom stop far enough to permit upward movement of the slider byone hand, while the other hand holds the pin and its side of the garment downward.

- The parts will not wedge together, as happens with prior forms of anti-mismesh separable slide fasteners. In one very special case the present fastener possibly may be jammed, but only as a result of special effort to misuse the fastener. I refer to the fact that if the pin is inserted only partially, and if then both the pin and the bottom stop are held securely and fixedly against any movement relative to one another in order to maintain this improper and misaligned position, and if the slider is then pulled up while still holding the parts against either a corrective movement of the pin into the socket or a free sliding movement of the pin upwardly alongside the other stringer, in that case the parts pos: sibly may be wedged together. But even in that case such wedging action as may possibly take place with the simplest form of the invention shown in Fig. 1 of the drawing, will not take place with the form of the invention having notches for the projections, as shown in Fig. 7

of the drawing. And even the simple form shown in Fig. 1 is not likely to jam, for the angle involved is broad. rather than slight, as is explained in the next paragraph.

The location of the ears and their liberal dimension is such as to cause the slider to take the pin along with it, and to prevent the wedging action which has been customary in the past, and which wedging action, besides jamming the parts, was not a dependable safeguard because if sufficient force was applied to the slider the wedged parts, being subjected to the greatly multiplied force caused by the wedging action itself, would give away and allow the stringers to be mismeshed. The projections here provided on the back of the pin are not to be confused with a projection on the front of the pin, for the back.

projections engage not the straight but rather the divergent flanges of the slider (see Fig. 6), and hence the angle involved is an abrupt angle rather than a slight wedging angle. (Of course, when the notches 42 (Fig. '7) are used, there is no possibility of confusing the action of prior and the present anti-mismesh fasteners.) In the present case, the upwardly moving slider does not force the pin merely-sideward against the other stringer, but rather moves it longitudinally alongside the other stringer, and so prevents the initiation of a wedging action.

Another advantage of the present construction is that the face of the pin which confronts the ends of the elements on the other stringer is fiat rather than crowned in the middle. In the latter case,.the rounded endsof the elements and the rounded edge of the pin can roll on each other, and since the fit of the slider around the elements is not always close, the elements and pin may move out of a common plane, thus reducing their combined dimension, and so not blocking the upward movement of the slider as intended. The present invention, instead of stopping the slider, allows the latter to move freely upward, but carrying the pin and its half of the garment With it into such a position that the mishap becomes obvious to the user, and with no chance of locking the wearer in the garment, or of damaging the fastener beyond further use. The present invention, instead of seeking to stop the slider because of faulty insertion of the pin, merely calls attention to the faulty insertion.

. The security of the present fastener when closed, as well as the disengagement of the ears from the notches when inserting the pin in the socket, are both aided by the fulcrum and cam;

Which tilt the pin as it is pushed home in the socket. No additional separate parts or pieces are needed. The cars are formed from the regular metal of the pin; the seats are simply notched into the slider; and the fulcrum and cam are formed from the regular metal of the clip and stud.

It will be understood that while I have shown and described my invention in several preferred forms, changes may be made in the structures disclosed without departing from the spirit of the invention, as sought to be defined in the following claims.

.. I claim:

1. A separable slide fastener comprising stringers carrying interlockable fastener elements, a slider for meshing said elements, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collaterally of the tape and beyond the fastener elements, and the slider having a mating recessed seat for receiving said projection, so that if the pin is not inserted fully in the socket the projection is received in the aforesaid seat, whereas when the pin is inserted fully in the socket the projection is below the aforesaid seat.

2. A separable slide fastener comprising stringers carrying interlockable fastener elements, a-

slider for meshing said elements, said slider including a Y-shaped channel defined by flanges, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collaterally of the tape, and a flange of the slider being notched to form a seat for receiving said projection if the pin is not inserted full in the socket.

3. A separable slide fastener comprising stringers carrying inter-lockable fastener elements, a slider for meshing said elements, said sliderineluding a Y-shaped channel defined by flanges,

a pin at the lower end of one of said stringers;

. 7' notches, whereby upward movement-v of. the. slider carries the pin-and itsstringer upwardly without meshing the elements.

4. A separable slide fastener comprising string.- ers having interlockable fastener elements, a slider for engaging or disengaging said elements, a pin at the lower end. of one of said stringers, a bottom stop at the lower end of. the other stringer, said stop. including a socket for receiv ing the aforesaid pin, the. upper and outer edge of said socket having a fixed fulcrum for hearing inwardly against the outsideof the pin, saidoutsideof the pin being. continuous: and unbroken to a point higher than the. fulcrum in order to present a continuousv surface against which the fulcrum may bear to provide the desired fulcrum action as the pin is inserted in the clipand with the pin. fully inserted in the clip. and the lower end ofsaid socket having a fixed cam. for bearing outwardly against. the inside. of said pin, the pin when fully seated in the socket being positively tilted to a position in. which the upper end of the pin is nearer the opposite stringer than the lower end. of the pinto thereby hold the fastener element adjacent the upper end of the pin close to the adiacentfastener element on the. opposite stringer, thereby ensuring against accidental opening: of the fastener beneath the slider when the slider has been raised to close the fastener.

5. A separable slide fastener comprising stringers carrying interlocking fastener elements, asl-ider for meshing said elements, a pin at the lower end of one of said stringers, a. bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper" endv of said. pin having. a. projection: extendoutwardly collaterally of the tape and beyond the fastener elementsso that if the pin is not inserted. fully in the socket, the slider in its; upward movement will engage said projection and carry the pin and itsstringer upwardly without meshing. the elements, the; upperend of said socket having a fulcrum for hearing inwardly against the outside or the pin,.said.outside. of the pin being continuous and unbroken; to a point higher than. the fulcrum in order to present a: continuous; surface against whichthe. fulcrum may bear to provide the desired fulcrum action. as the. pin is inserted in the clip and with the pin fully inserted in the clip and the lower end of said socket having. a fixed cam for bearing outwardly against the inside of said pin, the pinwhcn fully seated inthe socket being positively tilted to a position in. which the upper end of the pin is nearer the opposite stringer than the lower end of the: pin, thereby ensuring against accidental opening of the fastener beneath the slider when the slider has been raised to closethe fastener.

6. A separable slide fastener comprising. stringers carrying interlocking fastener elements, a slider for meshing said elements, a pin at; the lower end of one of said stringers, a bottomv stop at the lower end of the otherstringer, said bottom stop including a socket for receiving the. pin, the upper end of said pin having a pair of cars pro.- jecting outwardly collaterally of the tape and beyond the fastener elements, so that if the pin is not inserted fully in the socket,the:sliderin its upward. movement will. engage said earsv and carry the. pin and its stringer upwardly without mesh-. ing the elements, the upper end of. said socket having a fulcrum for bearing inwardly against the outside of the pin, said outside: of the pin being continuous and unbroken to'. a: point higher than: thefulcrum in order to present a continw- 76* said cars it the pin not inserted fully-inthe ous surface. against which the fulcrum may bear to provide the desired fulcrum action as the pin is inserted in the clip and with the pin fully inserted in the clip and the lower end of said socket having a fixed cam for bearing outwardly against the inside of said pin, the pin when fully seated in the socket being tilted to a position in which the upper end of the pin is nearer the opposite stringer than the lower end of the-pin.

'7. A separable slide fastener; comprising stringers carrying interlockable fastener ele-- ments, a slider for engaging or disengaging said: elements, said slider including a Y-shaped chan-' nel defined by flanges, a pin at the lower end, of one of said stringers, a bottom stop at the lowerend of the other stringer, said bottom stop including a. socket for receiving the pin, the upper end of said pin having a projection extending out-' wardly collaterally of the tape, a flange of the. slider being notched to form a seat for receiving said projection, the upper end of said socket having a fulcrum for bearing against the outside of the pin, and the lower end of said socket having a, cam for bearing against the inside of said. pin.

8. A separable slide fastener comprising, stringers carrying interlockable, fastener elements, a slider for meshing said elements, said slider including a 'Y-shaped channel defined by flanges, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collater ally of the tape, a flange of the slider being: notched to form a seat for receiving said project-- tionif the pin is not inserted fully in the socket. whereby upward movement of the slider carries. the pin and its stringer upwardly without meshing the elements, the upper end of said socket havinga fulcrum for bearing against the outside of the pin and the lower end of said socket having a cam for bearing against the inside of said pin, whereby as it is pushed home in the socket the pinis tilted to a position in which the upper end of thepin is nearer the opposite stringer than the lower end of the pin.

9; A separable slide fastener comprising stringers carrying inter-lockable fastener elements, a slider for engaging or disengaging said. elements, said slider including a. Y-shaped chamnel defined by flanges, a pin at thelower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop include ing a socket for receiving the pin, the upper end. of said pin having a pair of cars projecting outwa'rdly collaterally of the tape, the. diverging flanges of the slider being notched to form seats for receiving said ears when the pinis not in serted fully in the socket, the upper; end of said socket having a fulcrum for bearing against the; outside of the pin, and the lower end of'saidv socket having a cam for bearing against the inside of said pin.

10, A separable slide fastener comprising stringers carrying interlockable fastener elea merits, a slider for meshing said elements, said slider including a Y-shaped channel defined by flanges, a pin at the lower end of one of said stringers, a bottom stopat the lower end' of the other stringer, said bottom sto including a socket for receiving the pin, the upper end of said pin having a pair of ears projecting outwardly col.- laterally of the tape; the diverging flanges of the, slider being notched to form seats for receiving socket, whereby upward movement of the slider carries the pin and its stringer upwardly without meshing the elements, the upper end of said socket having a fulcrum for bearing against the outside of the pin, and the lower end of said socket having a cam for bearing against the inside of said pin, whereby as it is pushed home in the socket the pin is tilted to a position in which the upper end of the pin is nearer the opposite stringer than the lower end of the pin, thereby ensuring against accidental opening of the fastener beneath the slider when the slider has been raised to close the fastener.

11. A separable slide fastener comprising stringers carrying interlocking fastener elements, a slider for engaging or disengaging said elements, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collaterally of the tape, the dimensions of the parts of the slide fastener being such that the length of an element plus the width of the pin is less than the width of the slider channel, and the length of an element plus the width of the pin at the projection sions of the parts of the slide fastener being such,

that thelength of an element plus the width of the pin is less than the width of the slider channel,.the' length of an element plus the width of is greater than the Width of the slider channel,

the upper end of said socket having a fulcrum for bearing against the outside of the pin, and the lower end of the socket having a cam for bearing against the inside of said pin.

12. A separable slide fastener comprising stringers carrying interlocking fastener elements, a slider for engagin or disengaging said elements, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extendingoutwardly collaterally of the tape, the dimensions of the parts of the slide fastener being such that the length of an element plus the Width of the pin is less than the width of the slider channel, the length of an element plus the width of the pin at the projection is greater than the width of the slider channel, and the width of the fastener including the projection when the pin is properly seated in the socket is less than the width of the slider channel, the upper end of said socket having a fulcrum for bearing against the outside of the pin, and the lower end of said socket having a cam for bearing against the inside of said pin.

13. A separable slide fastener comprising stringers carrying interlocking fastener elements, a slider for engaging or disengaging said 1'.

elements, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collaterally of the tape, said slider having a seat for receiving said projection if the pin is not inserted fully in the socket, the dimensions of the parts of the slide fastener being such that the length of an element plus the width of the pin is less than the width of the slider channel, and the length of an element plus the width of the pin at the projection is greater than the width of the slider channel.

14. A separable slide fastener comprising stringers carrying interlocking fastener elements, a slider for engaging or disenga ing said elements, a pin at the lower end'of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a the pin at the projection is greater than the width of the slider channel, and the width of the fastener including theprojection wh'en the pin is properly insertedin' the socket isless than the width of the slider channel.

15. A separable slide fastener comprising stringer carrying interlocking fastener elements, a slider for engaging or disengaging said elements, said slider including a Y-shaped channel defined by flanges, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collaterally of the tape, a flange of said a slider being notched to form a seat for receiving said projection if the pin is not inserted fully in the socket, the dimensions of the parts of the slide fastener being such that the length of an element plus the width of the pin is less than the Width of the slider channel, and the length of an element plus the width of the pin at the projection is greater than the width of the slider channel, the upper end of said socket having a fulcrum for bearing against the outside of the pin and the lower end of said socket having a cam for bearing against the inside of said pin.

16. A separable slide fastener comprising stringers carrying interlocking fastener elements, a slider for engaging or disengaging said elements, said slider including a Y-shaped channel defined by flanges, a pin at th lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a projection extending outwardly collaterally of the tape, a flange on said slider being notched to form a seat for receiving said projection if the pin is not fully inserted in the socket, the dimensions of the parts of the slide fastener being such that the length of an element plus the width of the pin is less than the width of the slider channel, the length of an element plus the width of the pin at the projection is greater than the width of the slider channel, and the width of the fastener including the projection when the pin is properly seated in the socket is less than the width of the slider channel, the upper end of said socket having a fulcrum for hearing against the outside of the pin and the lower end of said socket having a cam for bearing against the inside of said pin.

17. A separable slide fastener comprising sgrin'iers carrying interlocking fastener elements, a slider for engaging or disengagin said elements, a pin at the lower end of one of said stringers, a bottom stop at the lower end of the other stringer, said bottom stop including a socket for receiving the pin, the upper end of said pin having a pair of ears projecting outwardly collaterally of the tape, the dimensions of the parts of the slide fastener being such that the length of an element plus the Width of the pin is less than the width of the slider channel, and the length of an element plus the width of the p n at the cars is greater than the width of the slider channel, the upper end of said socket having a fulcrum for bearing against the outside of the pin, and the lower end of said socket having a cam for hearing against the inside of said pin, whereby as it is pushed home the socket the pin is tilted to a position in which the upper end of the pin is nearer the opposite stringer than the lower end of the pin.

OTTO J. MOEHLER.

REFERENCES GITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date r nsk -v Ju y .12, .1938 un a k .-.--.-.-.w-u- F b, I, 19 Marinslgy Sept. 5, 1939 Marinsky Sept. 5, .1939 Kelluxn V Oct. 27, 1942 OREIG PATENTS Country Date France of 1932

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