US2657444A - Slide fastener - Google Patents

Description

Nov. 3, 1953 A. BASHOVER 2 7,

SLIDE FASTENER Filed Feb. 14. 1951 s Sheets-Sheet 1 INVENTOR. ALBERT BASHOVER is h BY mt F IE 2-3 H ATTORNEYS A. BASHOVER SLIDE FASTENER Nov. 3, 1953 3 Sheets-Sheet 2 Filed Feb. 14. 1951 ltlll flullll lllll 7 H\S ATTQRNEYS Nov. 3, 1953 A. BASHOVER 2,657,44

sum: FASTENER Filed Feb. 14. 1951 s Sheets-Sheet s IN V EN TOR. ALBERT BASHOVER t-us ATTORNEYS:

Patented Nov. 3, 1953 UNITED STATES raiser orsies SLIDE FASTENER Albert Bashov r, Newar N- .J., assignor to Gonmar Products Corp on, Newark, a corporation of New Jersey 7' Application February 14, 1951, Serial No. 210,900

,18 Claims. (01. Ba -205, 4)

'This invention relates to slide fasteners, especially automatically locking sliders, more particularly to such a slider which may be op:- erated from either side of the fastener.

There are a number of applications of slide fasteners in which it is desirable to be able to operate the slider from either side of the fastener. The slider of such fastener is commonly called a reversible slider. The primary object of the present invention is to provide a reversible slider which is of the automatically loo-king type. This requires not only a finger piece on each side of the slider, as is usual with reversible sliders, but also appropriate connec-.- tions so that either finger piece will unlock the automatic lock.

To develop and perfect an automatic lock slider is a costly task. One object of the present invention is to provide reversible slider mech anism which is applicable to standard sliders, that is sliders which have been perfected and commercialized already.

Still another object of the present invention is to provide reversible slider mechanism which is not peculiarly dependent on the construction of the finger piece or pull, and which accord= ingly may be employed with any of a number of forms of finger piece, such as a stiff pivoted pull, a chain pull, or a sliding buttonetype finger piece.

To accomplish the foregoing general objects, and other more specific objects which will hereinafter appear, my invention resides in the reversible automatic lock slider elements, and their relation one to another, as are hereinafter more particularly described in the following specificae tion. The specification is accompanied by drawings in which:

Fig. 1 is a plan View of a reversible automatic lock slider embodying features of my invention;

Fig. 2 is a section taken approximately in .the plane of the line 2-2 of Fig. 1;

Fig. 3 is a section similar to Fig. 2 but showing the slider in unlocked condition;

Fig. 4 is a perspective View of an adapter which is added to an otherwise standard automatic lock slider, to convert the same into the reversible lock slider shown in Figs. 1, 2 and 3;

Fig. 5 is a plan view of a modified viorm of the invention;

Fig. 6 is a section taken in the plane of the lin 5-6 of Fig. 5;

Fig. 7 is a perspective view of a modified adapter employed the slider of Figs. 5 and 6;

Fig. -8 is a plan view of still another form of 2 the invention utilizing a button type finger piece;

Fig. 9 is a side elevation of the same;

Fig. 10 is a section taken approximately in the plane of the line 19mm of Fig. 8;

Fig. 11 is a back view of still another modificar tion of the invention;

Fig. 12 is a section taken approximately in the plane of the'line l2fl2 of Fig. 11; and

Fig. 13 is a perspective view of an adapter forming a part of the slider shown in Figs. 11 and 12.

Referring to the drawing, all forms of the in: vention have in common the use of a slider body B having a latch L with a locking :tooth I and a cam surface C for moving the latch to release the locking tooth. These parts may be conven-..- tional. In all cases there is added to the slider a yokeslike adapter A which is disposed around the slider body B at the neck end, and which is slidabie for a limited distance longitudinally of the slider. Some form of back finger piece or pull P :is provided on the back of the adapter A, and there is also .a front linger piece F. The fin er pieces 1 and I m y be connected to and carried by the adapter .A as separately formed element or thevmay be carried by the adapter by be ng termed a a part or parts hereof Anpropnate means. is provide at the fr nt f the adapt r f r soeooperatin wi h t e lin er pieces and the can; surf ce that a moveme of either fi ger p ece taste rpenin direc tion, that is to the ri ht as she '11 -issiz'ai-i will cause relea e of the in g tooth- Considering the invention in greater detail, and referrin more particul r y to Fig M1 through i of the d awin t s e ifi slider bod-y B and latch L- a e i a sta; d o i disclosed Let ers ate t 12. .23, 0 ,sued serene 19. 0, to re nest Ulrich and dads pa e, and d sclosed in, their pen ing pat 11 aisles on Serial to. 89,375, mes arm 2. 1.949. ii-1e sides of the latch are shaped to iform resilient or sprin arms 5 which serve to urge the lock? mg tooth inward to locking position. There are preferably two teeth, slightly staggered to engage the elements E on the two stringers of the fastener.

There are two cam surfaces 6 formed on Ops posite sides of the latch. The finger piece is provided with inwardly directed :trunmons or projections 12 which are anchored beneath the cam .zsurfaces It will be evident that when the 'finger piece is moved in fastener-closing zdir rection the locking teeth may simply ratchet over the ia-stener elements. .When the finger piece is moved in fastener-opening direction, that is to the right as shown in Fig. 2, the trunnions l2 bear against the cam surfaces C and so raise the latch from the position shown in Fig. 2 to that shown in Fig. 3, at which time the teeth are disengaged from the elements E of the fastener, as is clearly shown in Fig. 3.

Now in accordance with the present invention the adapter A is a yoke-like member which is disposed around the slider body B at the neck end of the slider, and which adapter is slidable for a limited distance longitudinally of the slider. The back finger piece or pull P is secured to the back arm [4 of the adapter, as by means of the bent or channel portion IS. The front arm of the adapter is preferably bifurcated, as shown at 18 in Fig. 4, to straddle the latch L, and the bifurcations 18 have inwardly directed projections 20 which are received. beneath the cam surfaces C immediately adjacent the pull trunnions l2. It will be understood that the slider may be actuated by the rear finger piece P, for when it is pulled in fastener-closing direction the teeth simply ratchet over the fastener elements, and when it is pulled in fastener-opening direction it causes the adapter A to move slightly relative to the slider body, as is shown by the change from Fig. 2 to Fig. 3 of the drawing, and the projections 20 bear against the projections l2 and cause the same to move exactly as though the upper finger piece F were being actuated. The resulting movement of the trunnions I2 raises the cam surfaces, and consequently the latch and locking teeth.

It may be mentioned that the particular slider hod here shown is a one-piece body having upper and lower wings 22 and 24 integrally connected by a neck 26, the said wings having flanges or rails 21 which, together with the neck, form the usual Y-shaped slider channel. The upper wing 22 is preferably formed with an integral fixed lug. This lug is indicated at 28. It is displaced or excised outwardly, and is indented at the sides to form elongated indentations which are long enough to accommodate the desired unlocking movement of the projections l2 and 20 longitudinally of the slider. As is best shown in Fig. 1 of the drawing, the trunnions [2 of the finger piece F are preferably projected inwardly far enough to enter the side indentations of the fixed lug. This, of course, greatly strengthens the connection of the finger piece to the slider body, for it may be considered to be permanently connected to the fixed lug, and need not rely on the connection to the latch.

The latch L is preferably formed out of sheet metal bent to provide an inverted, trough-like, hollow body dimensioned to be received around the outside of the fixed lug 28. The lug acts to take up the force exerted bythe trunnions, which otherwise would be transmitted entirely to the latch. Because of the inwardly projecting trunnions 12 there is a camming action at the outer portions of the trunnions, and an anchoring action at the inner ends of the trunnions.

The inward projections 20 of the adapter may be and preferably are extended inward as far as are the trunnions 12, as shown in Fig. 1, so that the adapter is independently and permanently anchored to the slider by means of the fixed lug 28, apart from the movable latch L. The engagement of the projections 20 with the lug limits the longitudinal movement of the adapter so that the adapter is prevented from sliding off the slider body B.

Referring now to the modified form of the invention shown in Figs. 5, 6 and 7, this employs identically the same slider body B, latch L, and fixed lug 28 as was previously described. The adapter, however, is shaped somewhat diiferently. As before, it is bent around the slider body, and the forward or upper arm is bifurcated to straddle the latch L, the resulting bifurcations being numbered 30. These are disposed edgewise, and are transversely notched at their lower edges, as is indicated at 32. The upper finger piece or pull F has trunnions 34 of increased length, that is, the spacing between the arms 36 of the pull (Fig. 5) is increased enough to provide room for the arms 30 of the adapter. The notches 32 are dimensioned to receive the trunnions 34, as shown in Fig. 6.

The operation of this form of the invention is substantially the same as previously described, for movement of the finger piece F in opening direction cams the latch outwardly to unlocked position, and movement of the back finger piece P in the same direction is applied to the adapter, which in turn causes a corresponding movement of the trunnions 34, and consequently a camming action to release the latch.

As so far described, the slider has had ordinary pivoted pulls. These pulls have been shown as rigid members, but it will be understood that either or both pulls may be replaced by flexible chain pulls. However, it is not essential that the finger piece be a pull, and a modified form of the invention in which the finger pieces are of the button-type is shown in Figs. 8, 9 and 10 of the drawing. Referring to those figures, the slider body B is the same as previously described, and is provided with a fixed lug 28 and a movable latch L, exactly as previously described. The finger piece F on the front side of the slider is of the button-type described and claimed in a co pending application of Frederick Ulrich, Serial No. 206,746, filed January 19, 1951. The finger piece consists of a piece of metal of adequate thickness, bifurcated at 49 to provide arms 42 which straddle the latch L. These have inwardly directed projections :34 which come beneath the cams of the latch. They are also preferably made long enough to enter the elongated side indentations of the fixed lug 28, as best shown in Fig. 10, thus anchoring the finger piece to the slider body independently of the latch. The sides of the finger piece extend for a substantial distance below the projections 44, as shown at 45 in Fig. 8, thus preventing pivoting of the finger piece about the projections, and instead causing the button-like finger piece to lie fiat against the surface of the slider body. The outer edges of the finger piece are preferably roughened or serrated, as shown at 36.

Now in accordance with the present invention there is a back finger piece P, and in the particular form here shown, the back finger piece is also of the buttontype. The front and. back finger pieces are preferably and most simply formed of a single piece of metal. This is bent at 48 to form a yoke which extends around the slider at the neck end thereof, and which is slidable for a short distance longitudinally of the slider. It will be evident from inspection of the drawing that if either the front or back button is moved in fastener-opening direction the projections M will cam the latch outwardly, thus raising the locking teeth from the fastener elements.

It will be understood that in the present form of the invention, as in those previously described,

finger piece at the front or the slider;

' ace-M44:

forpur oses oranalwsi's and definitionthere is air adapter A which his around the slider body atthe neck; and which carriesa finger piece at the back of the slider. The adapter also carries a In the present form of the invention ithappens to be most. convenient to form the finger pieces 1 1113 6 graliiy with the adapter, but separate button-dike finger pieces: might equally well be secured to an adapter;

Moreover, it isnotessential to employ buttonlike finger pieces on bothsides of theslider, and itwill be understood that the ideas shown; in Figs. 1 and 8 may be combined, that is. a pendant type finger piece maybe used at the front of the slider in combination with a button-type finger-' piece at. the hack, and vice versa. such case the button type finger piece is' preferably, though not' necessaril-y', formed integrallyw-iththe adapter.

The arrangementof Figs. 8, 9" and 19' illustrates the fact-thattheinward proiections of the adapter may perform the cammingaction, instead of the inward projections of the finger piece. In Figs. 8; 9 and there is only one pair of inward projeet'i'ons 44 These may be considered tobe inward projections onthe adapter, or they may be considered to be the inward projections of the finger piece. In anyevent the single pair of projections serves both to anchor the parts on the slider, and toactuate the latch- From comparison with the pending Ulrich application previously referred toit may-be said that the inward projections are a part of thefinger piece, for they correspond to projections there employed Where there is no adapter. 0ntheother hand, even in the form of the invention shown Fig. l the bifurca-tions of the adapter could be made slightly longer, and the inward projections of the adapter could be employed to cam the latch. In thatcase the front finger piece should be attached to the adapter, instead of to the latch.

If desired, any of the forms: of the invention so far described may be additionally refined andstrengthened by the provision of a ingon the back wing of the slider, as well as on the front wing of the slider; Such an arrangement isshown: applied inFigs. 1 1, 12 and 1-3-'of the drawing, tothe slider of Fig. 1 Inthiscasethe slider body Bis generally the sameas that previously described, with the exception that the back wing of the slider is excised, and indentedat the sides, to form a rear lug 50; The-slider body is standard in respect to the automatic lock mechanism, and itsonly departure from the standard slider is the piercing of the back wing to form the lug 50. extra operation is readily introduced in the manufacturing process before the slider blank has been bent at the neck. It is already knownto provide sliders with front and back lugs to carryfront and back pulls, for reversible sliderswhich are not of the automatic locking type.

The adapter A is generally similar to that shown in Fig. 4, except that the-back arm 52 of the adapter is bifurcated as shown at 54 in Fig; 1-3; This bifurcation permits the back of the adapter to straddle the back lug 51!; as shown in Fig. 1 1 The rear finger piece or pull P may be identihal with the front pull, it having inwardly directedprojectionsor trunnions 56 which are held not only beneath the hooks or troughs 58 of the adapter; but also within the side indentations the fixedi lug 50. It is evident that this strengthens the. attachment or the pull P to the.

body, and that the. adapter their serves.

more. exclusively the function of transmitting longitudinal motion or shiftingof the pull tdthe: front. side of the slider, where it is applied to the. camming surfaces in: order. to. unlock the. latent It will be understood that the use of a fixed lug on the back of the slider, with a corresponding bifurcation of the back of the adapter, is equaliy' readily applicableto each of the other forms of. the invention shown.

It will be understood that While: I have shown the invention applied to an automatic locking: slider of one form, that has been done partly because the slider is of preferredform, and also t'o show that various forms of the invention; are arrpiicable to a single automatic lock mechanism. The invention is equally applicable to automatid lock' sliders ofi other types: as, for example, that shown in the Norton Patent 1,966,457 issued 17, 1934.

It is believed that the construction and operation of my invention, and the method ct applying the same to standard lock. sliders, as: weli as the: advantagesthereof; will be apparent from". the

foregoing detailed description. It will also be ap parent that while I have shown and described my invention in several preferred forms, changes may be made in the structures disclosed with out departing from the scope: of the; inventiom.

sought. to; be. defined the following claims;

I claim: 1. A reversible automatic lock; slider compris ing: a body having a. latch with a. locking. tooth and a cam surface engaged by a front; finger piece for moving the. latch to; release. the

locking tooth, said locking: tooth and: cam: surface bothbeing located on the same side: ofsaid* slider body, a. yoke-like adapter disposed; around the slider atfthe. neck. end and: slidable. for. a limited distance longitudinally'of. theslider, a back. finger piece provided. on the back of the. adapter, and:

' means at the frontier the adapter socooperating cated: to straddle the latch, aback. finger provided on the back of the: adapter; a front finger. piece, and means at the bifurcated; front of the adapter so cooperating. with the fronii.

finger piece and the cam surfacerthat a:-

ment. in. fasteners-opening." direction or" either finger piece releases the locking tooth.

3. A reversible: automatic lock slider compris ing; a slider body having a latch with. a locking tooth and cam surfaces for moving the: latch torelease the locking tooth, a. yoke-like adapter disposed around the slider atthe neckend and slidable for a limited distance longitudinally of the slider, the front. of the adapter being bifur' cated: to straddle the. latch, a back finger piece. provided on. the back of the adapter. a finger piece). and inwardly directed: projections. at the front. of: the adapter so cooperating. with: the front finger piece and the camsurfaces: that a movement in fastener-opening direction. of: either finger piece releases the lockingtontln.

4:. A. reversible automatic lock slider comprising. a sliderbody" having: a. latch with a: locking. tooth. and: a. camsurface for moving the: latch; to:

7 c release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, a back finger piece provided on the back of the adapter, a front finger piece having inwardly directed projections received beneath the cam surface, and the front of said adapter having a projection received beneath the cam surface immediately adjacent the aforesaid projections of the front finger piece, whereby movement in fastener-opening direction of the rear finger piece causes the adapter to correspondingly move the front finger piece which in turn acts on the cam surface.

5. A reversibl automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surface for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the front of the adapter being bifurcated to straddle the latch, a back finger piece provided on the back of the adapter, a front finger piece having inwardly directed projections received beneath the cam surface, and the bifurcated front of said adapter having inwardly directed projections received beneath the cam surface immediately adjacent the aforesaid projections of the front finger piece, whereby movement in fastener-opening direction of the rear finger piece causes the adapter to correspondingly move the front finger piece which in turn acts on the cam surface.

6. A reversible automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surface for moving th latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the front of the adapter being bifurcated to straddle the latch, a back finger piece provided on the back of the adapter, a front finger piece having inwardly directed projections received beneath the cam surface, and the bifurcated front of said adapter having inwardly directed projections received beneath the cam surface immediately adjacent the aforesaid projections of the front finger piece, whereby movement in fastener-opemng direction of the rear finger piece causes the adapter to correspondingly move the front finger piece which in turn acts on the cam surface, the front of said slider having a fixed lug with elongated indentations at the sides, said latch surrounding said lug, and said inwardly directed projections passing through the sides of the latch into the lug.

'7. A reversible automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surface for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, a back finger piece provided on the back of the adapter, a front finger piece having a projection received beneath the cam surface, the front of the adapter having a transverse notch which receives and straddles th aforesaid inwardly directed projection of the front finger piece, whereby movement in fastener-opening direction of the rear finger piece causes a corresponding movement of the adapter and front finger piece.

8. A reversible automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surface for moving the latch to 8 release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the front of the adapter being bifurcated to straddle the latch, a back finger piece provided on the back of the adapter, a front finger piece having inwardly directed projections received beneath the cam surface, the arms of the bifurcated front of the adapter having transverse notches which receive and straddle the aforesaid inwardly directed projections, whereby movement in fastener-opening direction of the rear finger piece causes a corresponding movement of the adapter and front finger piece.

9. A reversible automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surface for moving th latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the front of the adapter being bifurcated to straddle the latch, a back finger piece secured to the back of the adapter, a front finger piece having inwardly directed projections received beneath the cam surface, the arms of the bifurcated front of the adapter having transverse notches which receive and straddle the aforesaid inward- 1y directed projections, whereby movement in fastener-opening direction of the rear finger piece causes a corresponding movement of the adapter and front finger piece, the front of said slider having a fixed lug with elongated indentations at the sides, said latch surrounding said lug, and said inwardly directed projections passing through the sides of the latch into the lug.

10. A reversible automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surfac for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, a finger piece carried by the back of the adapter, a finger piece carried by the front of the adapter, the'front of the adapter being bifurcated to straddle the latch and having inwardly directed projections beneath the aforesaid cam surface, whereby movement in fasteneropening direction of either front or rear finger piece releases the locking tooth, at least one of said finger pieces being a button-like element formed integrally with the adapter.

11. A reversible automatic lock slider comprising a slider body having a latch with a locking tooth and a cam surface for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, a button-like back finger piece carried by the back of the adapter, a button-like front finger piece carried by the front of the adapter, the front of the adapter having an inwardly directed projection beneath the aforesaid cam surface, whereby movement in fasteneropening direction of either front or rear finger piece releases the locking tooth.

12. A reversible automatic lock slider comprising a slider body having a latch with a looking tooth and a cam surface for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, a button-dike back finger piece having serrated edges and formed integrally with the back of the adapter, a button-like front finger piece having serrated edges formed integrally with the front of the adapter, the front of the adapter being bifurcated to straddle the latch and having inwardly directed projections beneath the aforesaid cam surface, whereby movement in fastener-opening direction of either front or rear finger piece releases the locking tooth.

13. A reversible automatic lock slider comprising a slider body having a latch with a looking tooth and a cam surface for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, a button-like back finger piece having serrated edges and formed integrally with the back of the adapter, a buttonlike front finger piece having serrated edges formed integrally with the front of the adapter, the front of the adapter being bifurcated to straddle the latch and having inwardly directed projections beneath the aforesaid cam surface, whereby movement in fastener-opening direction of either front or rear finger piece releases the locking tooth, the front of said slider having a fixed lug with elongated indentations at the sides, said latch surrounding said lug, and said inwardly directed projections passing through the sides of the latch into the lug.

14. A reversible automatic lock slider comprising a slider body having a fixed lug on its rear wing, and on it front wing a latch with a locking tooth and a cam surface for moving the latch to release the locking tooth, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the rear of said yoke being bifurcated to straddle the lug, a back finger piece provided on the back of the adapter, said back finger piece having inwardly directed projections entering the fixed lug, a front finger piece, and means at the front of the adapter so cooperating with the front finger piece and the cam surface that a movement in fastener-opening direction of either finger piece releases the locking tooth.

15. A reversible automatic lock slider comprising a slider body having a fixed lug on its rear wing, and on its front wing a latch having a locking tooth at one end and a cam surface, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the front of said yoke being bifurcated to straddle the latch, and the rear of the yoke being bifurcated to straddle the rear lug, a back finger piece having inwardly directed projections connected to the back of the adapter and to the back lug, a front finger piece having inwardly directed projections secured beneath the cam surface, and the front of said adapter having inwardly directed projections disposed immediately adjacent the projections of the front pull and coming beneath the cam surface, the arrangement being such that movement of either finger piece in fastener-opening direction releases the locking tooth.

16. A reversible automatic lock slider comprising a slider body having a fixed lug on its front wing and another fixed lug on its rear wing. a

latch enclosing the front lug and having looking teeth at one end and cam surfaces at the sides, a yoke-like adapter disposed around the slider at the neck end and slidable for a limited distance longitudinally of the slider, the front of said yoke being bifurcated to straddle the latch, and the rear of the yoke being bifurcated to straddle the rear lug, a back finger piece having inwardly directed projections connected to the back of the adapter and to the back lug, a front pull having inwardly directed projections secured beneath the cam surfaces and to the front lug, and the front of said adapter having inwardly directed projections disposed immediately adjacent the projections of the front pull and coming beneath the cam surfaces and into'the front lug, the arrangement being such that movement of either finger piece in fastener-opening direction releases the locking teeth.

17. In combination with an automatic lock slider of the type havin a locking latch on one side of the slider, said locking latch being provided with a cam engageable to move the latch to unlocking position, slider-actuating means having an inturned projection received beneath the cam, an adapter comprising a substantially U-shaped member, said member being disposed on the slider with the base of the U adjacent the neck of the slider and with each arm of the U disposed adjacent the slider wings, the arm of the U adjacent the latch side of the slider having an inturned projection received beneath the cam of the latch, the other arm of the adapter being provided with a second slider-actuating means, said second slider-actuating means serving through said adapter to unlock the latch located on the opposite side of the slider.

18. In combination with an automatic lock slider of the type having a locking latch on one side of the slider, said locking latch being provided with a cam engageable to move the latch to unlocking position, slider-actuating means being inturned projections received beneath the cams, an adapter comprising a substantially U- shaped member, said member being disposed on the slider with the base of the U adjacent the neck of the slider and with each arm of the U disposed adjacent the slider wings, the arm of the U adjacent the latch side of the slider being bifurcated and having inturned projections, said projections being received beneath the cam of the latch, the other arm of the adapter being provided with a second slider-actuating means, said second slider-actuating means serving through said adapter to unlock the latch located on the opposite side of the slider.

ALBERT BASHOVER.

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