US2271141A - Slider for separable fasterners - Google Patents

Description

Jan. 27, 1942.

M. H. LANG- 2,271,141

vSLIDER FOR SEPARABLE FASTENERS` Filed June 1, 1939,

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111V 1I. Je 5 24 34 WITNESS INVENTOR l -fM//x/LA/Gs ATTORN EY-S means are venting unintentional movements of the slider 5 along the fastener structure.

`locking means usually comprisea locking memyprovide a slider movement along 'lowing description thereof when taken in connection with the accompanying drawing .in which 45 Fig. 1 is a side elevation of a Patented Jann-27, 1942l UNITED STATES TENT oFF-rcs f v SLIDER Fon' SEPARABLE FASTENERS Max H. Lange, Maspeth, N. Y., assigner to Waldes Koh-I-Noor, Inc., Long Island City, N. a

corporation of New York,

Application June 1, 1939, serial No.' 276,829 c (crea-205)- This invention relates to separable fasteners of the slideoperated type and more particularly 'to sliders for such fasteners. wherein looking incorporated for automatically pre- Such automatic ber pivotally mounted on the slider body and a spring for normally urging the pivoted locking member into engagement w1th the interlocking lo elements positioned within the slider, in combination with, a pull tab associated with the locking member to lift or move the latter out of locking position when it is desired to move the slider in the direction for disengaging the interl5 locking elements of the separable fastener.

Itis the object of. the present invention to embodying new and improved means for automatically locking the slider'against A further object of the invention is to pro- 30 vide` an improved slider having locking means which will normally engage with the interlocking elements of the separable fastener but which is so constructed and arranged with relation tol .Y

the pull tab that it may be locked in disengaged :v5

position so as to enable free movementof the slider along the rows-of elements and to permit opening of the separable fastener by exerting a `separating forc'e on the stringer's thereof without danger of damaging o r ripping volf the interlock- 40 ing elements.

Other objects and advantages of the locking slider of this invention will appear from the folslider embodying the invention with the pull tab partially broken vaway and shown in the safety lock position; Fig.

2 is a longitudinal sectional view of. the slider shown in Fig. 1, illustrating the relation of the locking parts in the safety lock position' and showing 'a few of the interlocking elements of the separable fastener in elevation to illustrate the relation of the locking member with respect to such elements in its unlocked position;

the rows of interlocking ele- 20 I fingered relation.

.of a housing or cap member isa view similar to Fig. 2 but showing the pull .tab positioned so as to enable the locking member to engage with theinterlocking elementsof the separable fastener; Fig. 4.is a View similar to Figs. 2a-nd 3 and illustrates theA action of the lockingelement when the slideris moved to interlock-the interlocking elements -or to the right as viewed in such figure-and Fig. 5 is an end view'of Fig. l, the slider being viewed from the left of Fig. 1. y y

The separable fastener of the type with which this invention is concerned usually comprises a pair of stringers or tapes havingvreinforced opposed edges to are attached in spaced relation. The interlocking elements ofthe fastener are all, similar in construction. and the elements of each Stringer are arranged in staggered relation with theelements of the other Stringer so that they can come together and interlock properly in intergagement of the interlocking elements are controlled by themovement of a slider which embodies a body portion having substantiallyparallelly spaced wings and being formed so as to provide a substantially Y-shaped channel between the plates through which the interlocking elements pass in themovements of the slider.l

In the drawing the spaced wings or plates of the sliderare-indicated by the numerals l and il, such wings being connected by 'an integral transverse portion l2 of reduced. dimensions.- Adjacent to the transverse' portion I2 is a transverse memberI I3 which is wedge-shaped intermediate the plates Ill andv il (see Fig. 5) and extends up through the upper plate IB to terminate in an upwardly projecting stud portion It of enlarged dimensions and having a shoulder portionwhich engages with the outer surface of the plate I0 (see Figs. 2 and 3). The member I3 is assembled on the slider body by inserting it through aligned apertures in the plates l0 and II and is permanently secured in position by upsetting its lower end against the undersurface The stud portion ofthe back or rear plate H. l5 of the member I3 is disposed within one end I5 which is secured to the stud portion I4 in any suitable fashion such as by rivets or by indentingit into indenta- 50 tions formed on each side of the stud It as is indicated at I6 in Fig. 1 of the drawing. The

' other end of the housing memberl I5 is secured manner as by l1 into the plate I0 in any suitable means of a wedge-shaped depending tab Fig. 3 55 tetra! with the housing member I5 and permawhich the interlocking elements The-engagement and disennently secured ina wedge-shaped'slot I9 formed in the adjacent end portion of the plate Il), as

is illustrated in Figs. 2, 3 and 5 of the drawing. Positionedwithin the housing or cap member VI5 and extending longitudinally ofthe slider, is a locking member I9 which is'loosely retained in upright position by the side walls of such cap member and is loosely conflnedagainst longitudinal movement within the cap member by the lug.portion I4 and the opposite end of the and 2| 'have their longitudinal edges disposed in opposed relation to the upper surface of the top plate I0, such edge of each leg portion beingA formed to-provide two cam surfaces 23 and 24v intermediate its ends and connected by a de' pending portion 25 which isspaced from the top plate I0. The cam surfaces 24 oi' the'leg portions extend from the depending portions 25 in aconcave manner toward the end of the locking member which lies adjacent to the stud portieri` I4 to provide two triangularly shaped portions whosel apexes 26 bear against the outer surface of the plate III when'the locking member I9 is horizontally disposed, as is shown in Fig. 2. 'Ihe cam surfaces 23 of the leg portions extend from the depending portions 25 in: the opposite direction and are-of smaller radius than the cai surfaces 24. Theeam surfaces 23 form the inner edges yof a pair of depending portions 21 whose lower ends normally extend intov av recess or aperture 28 provided in the top plate I 0.. The depending A29 of the locking member I9 is normally mainvthe separable fastener.

in engagement with the interlocking elements of 'Y Thus `when the trans-v verse portion 3|.ofthe pull tab is at rest inthe region of the cam surfaces 24, the locking detent tained in locking engagement with theinterlockportion 21 of the leg 2I of the locking member differs from the depending portion 2-1 of the leg 20 thereof in that it is additionally provided with a depending detent 29 formed vintegrally with such portion 21 of the leg and being offset therefrom as is illustrated more clearly in Fig. 5 of the drawing.

The housing or cap member I5 isy provided on each side in the region dened bythe cam surfaces 23 and v24 with an elongated slot or recess 30 through which extends a transverse portion-3| of a pull tab 32, such transverse portion 3I being disposed between the cam surfaces, of the-leg'portions of the locking member 'I9 and the exterior surface of the plate I0. VThe transverse portion 3l of the pull tab is so formed with relation to the cam surfaces 23 of the looking member I9 that when it is positioned between such cam surfaces 23 andthe upper surface of the plate I9, as is lshown in Fig. 2, the detent 29 will be withdrawn into the aperture 28 of the top plate I I) out\of engagement with the interlocking elements 33 of the fastener structure. When such transverse portion 3I of lthe pull tab is disposed between the cam surfaces 24 and the outer surface ofthe plate` I9 in the position shown in Fig. 3th'e cam surfaces 24 are so formed that the locking detent 29 is enabled to come into engagement with the interlocking elements 33 of the separable fastener. Due to the offset nature of the locking detent 29, it engages only with the elements 33of one row of the fastener, just beyond the outer ends of the interlocking elements in the other row.

From the' foregoing description it will be evident that in-the normal or at rest position of the parts, the pull tab 32 is in the position illustrated in Fig. 3 of the drawing with the transverse portion 3| thereof disposed inthe region defined by the cam surfaces 24- of the locking member I 9,-

,such transverse portion 3| functioning'as a fulcrum about which the-.locking member I9 is pivoted in a counter-clockwise direction, as-viewed ments of the separable fastener, whereby movement of the slider in the opening direction or to the left as viewed in Fig. 1 is prevented. vWhen it is desired to open the interlocking elements of the separable fastener, the pull tab 32 can be operated so thatthe transverse portion thereof 4bears against the depending portions 2l of the locking member I9, the cam surfaces 24 being so formed at this' region that under the force exerted by the transverse portion 3I of the pull tab, the locking member is lifted sufficiently to. withdraw the locking detent 29 thereof -from engagement with the interlocking elements. Due to the fact that during this action the points 25 of thel locking-*member I9 come into engagement with the upper surface of the plate III' of the slider, the locking member moves with a pivotal action about such points 26 against the tension of thespring 34. By exerting sufficient force to move f the transverse portion 3| of the pull tab past the depending portions 25 of the locking element,

such transverse portion comes into the region dej fined by-the cam surfaces 23 of. the lockingele- 5o.

ment wherein it is retained so that the u ser is enabledto unlock or disengage the interlocking elel ments simply by pulling the stringers apart without any danger of the locking detent Acoming into engagement with the interlocking elements rushing through the slider. During the "passage 'of the transverse portion' 3l of the pull tab into the safety lock formed by the depending portions 2l andthe cam surfaces 23, the locking detent 2l is withdrawn to its outermost position and then returned slightly when the transverse portion 3| is in its safety lock position, such return however n`ot being great'enough to enable the locking detent 29 to come into engagement with the interlocking elements of the slider. Themovement of the transverse portion 3I past the dependingk porytions 25 of the locking element is accomplishedwith a snap action under` the influence-of the lug portion I4 up against the body portion of the. spring and pivoting thelocking member aboutl Secured at one end between the lug 'portion I4 such end as a fulcru'm mounted within the such float unit is caused at times to seesaw against the tension of the spring ,3Q to lift the locking detent 29 thereof out of its normal lockingJ position. The locking member preferablyis so designed with respect to the other parts that this action of the pull tab entirely withdraws the locking detent 29 into the recess 28 out of contact with the interlocking elements 33 thereby preventing dragging of the detent along the upper s faces of the interlocking elements as the latter are being interengaged.

In order to obviate any possibility of the locking the interlocking elements asA detent 29 catching the slider is moved in the closing direction or to the right, as viewed .in 4, such detent is provided with an inclined lower edge surface 35 whichv enables the interlocking elementsto cam of their-path, as will be a study of Figs. 3 and 4 the locking detent out readily understood from of the drawing.

It will be observed therefore that in the foregoing construction the interlocking element is an independent, self-contained, rigid member which.

a casing member and which during the several operations of the pull is loosely enclosed within tab, is iulcrumed about three points, namely, the transverse portion 3l of the pull tab 32 when the slider is stationary with the detent engagingthe interlocking elements as is illustrated in Fig. 3; the portions or points 26 of the locking element when the pull tab is operated to move the slider to of the separable openI the interlocking elements fastener and the top edge portion of the locking element when the pull tabis operated to move the slider in the closing as illustrated in Fig. 4. `These several operations contained, rigid float direction or to the right detent at one end of the rigid locking member are accomplished because such memberby reason of its being loosely '1 casing-member is in the nature of a o at unit and is so arranged with respect to the spring '34 whose free end slidably engages the outer longitudinal edge portion of the float unit at apoint above the detent 29 thereof tof A I normally urge the latter to its locking position,

and the transverse portion 3l of the pull tab, that in the longitudinal movements of such portion 3i and the forces exerted thereon during the operations of the pull tab and consequently the slider,

about the transverse portion 3l and at other times to move about the legs 26 or the top edge of the float unit above the legs 26, depending upon the position of the transverse portion 3i of the pulltab with relation to the float unit and the direction of. force applied to such transverse portion.

also designed to main- The above construction is tab withrespect tain the positionof theA pullv to the locking element so that the latter is re-A tained in unlocked position to enable free move-- ment of the slider on the rows of interlocking elements either in the closing or opening directions and in the latter case enabling the fastenerstructure to apart the tapes or strngers thereof.

While I have in this application specifically shown and described a preferred embodiment of my invention, it will be understood that modications and changes may bodment without departing from the spirit of the invention or the scope the following claims.

I claim: 1 1. A slider for se arable fasteners comprising'a pair of 'plates spaced to receive the interlocking elements of the-fastener, a housing xed to one of said plates and having elongated longibe made in such lem-- thereof as defined in be opened simply by forcing- Y gitudinal ed'ge of said oat unit having an 'movement with relation to said plate, said rigid unit having a'rigiddetent at one end projecting into an aperture in the associated plate and having at its other end a rigid portion adapted, in at least one,of the positions of the rigid unit, to bear in 'disconnected relation .against a flxed surface portion within said housing to afford a fulcrum for the rigid unit, the inner longitudinal edge of said rigid unit being provided with a cam surface' approximately as long as the longitudinal openings in said housing, resilient means normally urging said detent into locking engagement with the fastener elements in the slider, a pull tab having a transverse member extending through the openings tween the cam surface of said rigid unit and the associated "plate,A said cam surface being arched and coacting withsaid transverse member of the pull tab to cause said vrigid unit to rock about its fulcrum portion in the'operations of the slider.

2. A slider for separable fasteners comprising a pair of plates spaced to receive the interlocking elements of the f astener, an independent, selfunit overlyingv one of said plates and loosely mounted for rocking movement with relation to such plate, means secured to said plate for loosely confining said iioat unit in its rocking movements, said float unit extending longitudinally of the slider and having a rigid aperture in said plate and having at its other end a plurality of spaced surface portions adapted to rest against said plate and confining means to aord fulcrum points for the oat unit, and said inner longitudinal edge lncluding an arched portion to provide a cam surface, resilient means normallyurging said del tent into engagement with fastener elements in the slider, a pull tab having a transverse member Yextending between said float unit and the associated plate, said 'transverse'member coacting with the cam surface to cause sad-float unit'to fulcrum portions when pulling pivot about its forces are applied to the pull `tab in the opera tions of the slider. s

3. A slider for separable fasteners comprising a pair of plates spaced to receive the interlocking elements of the fastener, a housing xedly mounted on one of `said plates, an independent, self-contained, rigid float unit overlying said plate and loosely mounted within the housing for rockingl movement with relation to said` plate, said float-'unit having a rigid leg at one end extending towards the exterior surface of said plate and in at least one of the positions of the float unit resting against sa'd plate surface to afford a fulcrum point for the -oat unit, said float unit into an aperture Y tudinal edge po 'on of said oat unit being shaped for engagement with a spring member and the inner longitudinal edge of said float unit intermediate said leg and detent including an arched portion spaced from the exterior surface of said plate and formnga cam surface, a spring member carried by the slider and having one end engaging with and bearing against the outer lonfloat unit at a pointy adjacent to the detent end thereof to normally urge said detent to 'its locking position, and a pull tab having a transverse member extending beadapted t'o project into anprojecting .tween said float unit and said plate and confined between said leg and detent, said transverse member coasting with the inner arched edge portion of said iioat unit upon movement of the pull tab to withdraw Asaid detent from its locking position against the yielding pressure f said spring member.

4. A slider for separable fasteners comprising a pair of plates spaced to receive the interlocking elements of the fastener, a housing fixedly mounted on one of said plates, an independent, self-contained rigid iioat unit overlying said plate and loosely vmounted within the housing for rocking movement with relation to said plate, said iloat unit having an outer longitudinal edge portion shaped for engagement with the spring member land being recessed on its inner longitudinal edge to form an inwardly extending rigid projection at one end thereof `and an inwardly extending rigid-detent at the other end thereof, said projection overlying the exterior surface of said plate and in at least one of the positions of tlie .float unit resting. against said plate surface to afford a fulcrum point for the oat unit, said pulling force is applied to said pull tab, and a spring member aiiixed at one end to ysaid slider and overlying said iioat unit, the free end of said spring member slidably engaging and bearing against the outer longitudinal edge portion of said oat unit at a point adjacent to the end of the range of Vmovement of said transverse member in the direction of said detent to nor,- mally urge the latter to its locking position.

5. A slider for separable fasteners comprising a pair of plates spaced to receive the interlocking elementsof the fastener, a lug projecting outwardly from one of said plates, ahousing ilxedly attached to said lug and said plate,an independent, self-contained,vrigid float unit overlying said plate-and loosely mounted within -said housing for rocking movement with relation to rigid detent projecting into an aperture provided in said plate, a spring anchored at one end between said lug and housing and extending over the outer longitudinal edge of said iloat unit to a point adjacent to the detent end o'fsaid; oat unit, the free end of said spring being in slidable engagement with and bearing against the outer longitudinal edge portion of said float. unit to normallyl urge said detent to its locking position and a pull tab having a transverse member ex.

tending through said housing and between said iioat unit and plate and having a range of movenient longitudinally of the slider between said leg and detent, said transverse member being adapted to coact with the innerarched edge portion of saidy float unit intermediate said leg and detent to withdraw the latter from its locking position against the pressure of said spring when a pulling force is 4applied to said pull tab.

l 6. A slider for separable fasteners comprising a pair of plates spaced-to receive the interlocking elements of the fastener, a lug projecting outwardly from one of said plates, a housing enclosing said lug and being flxedly attached thereto,

-an independent, selfecontained, rigid oat unit overlyingsaid plate and loosely mounted within said housing, for rocking movement with relation to said plate, said vrigid float being positioned intermediate one end of said housing and said lug and consisting of a lU-shaped .plate having an outer folded longitudinally extending edge affording an engaging surface for a spring member and its parallelly disposed longitudinally extending inner edges provided with a pair of inwardly projecting legs at one en d .andapair of inwardly extending projections at its other end, said legs being positioned adjacent to said lugfand adapted to bear on the exterior surface of said plate'in at least one of the positions of the oat unit toafford fulcrum points for the iloat unit and. at

least one of said projections being provided with a detent adapted to project .through an aperture in said plate, a spring anchored at one end besaid plate,'said oat unit having an outer longitudinal edge portion shaped for engagement with r a spring member and being arched on Vits inner longitudinal edge to form an inwardly project-` ing, rigid leg at one end thereof and an inwardly extending, rigid `detent at the other end thereof,

said rigid leg being positioned adjacent to lsaid I lugand overlying the' exterior Vsurfaceoi! Asaid plate and in at least one-of the positions of saidoat unit resting against said plate surface to 60 aiiorda fulcrum point for th'float unit, saidi tween said vlug and housing and extending over said float unit toa point adjacent'to the detent end of said float unit, the free end of said spring 1 being in slidable engagement .with and bearing against the outer folded longitudinal edge of said iioat unit to normally urge said detent to its locking position, and a. pull tab having a transverse member extending through said housing and between said float unit and plate and having a range of movement longitudinally' of the slider between the legs and projections of said float unit, the inner longitudinal edge portions en`- gageable by said transverse member being arched to provide two longitudinally extending cam surfaces and coacting with ysaid member to withvdraw the detent from its locking position against the pressure of said spring.

a. Max H. A Nciflsz.A

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