US2835011A - Cam lock slider - Google Patents

Description

May 20, 1958 G. s. MALcoLM CAM Locx SLIDER Filed June 8. 1958 IN V EN TOR.

GEORGE s. Macau g? 2 /zrmk/vfy Uni CAM -IJOCK SLIDER George S. Malcolm, Harmonsburg, Pat, `assignor :to Talon, Inc., a corporation of Pennsylvania Application June 8, 1953, Serial No. 360,280 tclai'ms. (crm-205.14)

rlhis inventionrelates to slide fastenersand, particularl'yzto a new 'and improved slider therefor of .thextype'illustratedand described in the United. States: Letters Patent tofCarlile, No. 2,277,818; issued Marchl, 1942.

`andl 'frictionally locks `the slider against` unintentional 'movement'ina manner well knownto Ith'oses-,skilled'cin the zart.

In. sliders of this type of construction, usually :this loclsing. tongue ;portion extend's.` abovel` the .slider 'btorlytat leastiin one -position of the pullitab member; i. e., when thezpull tab :is :disposed in .its extreme. unlocked position. When=the locking tongue is in 'positioned :intsuch position -above the. slider. body, it will .be vseen thatlit=is `;exposetl to :any destructiveforce to =whchtheasliderfmay 'b'e sub:- jected, such as that encountered in a pressirrg. operation. That is, .the .locking tongue 'is liable' to be'bentzinwardly whenwpressure is applied to ittherebymalcing:the-;slider .noalonger functionable as a lock slider.4 It is:1:to:'azslider having 'means incorporated therewith;for'i'protectingthis `yieldable locking tongueporton :from ibendingran'd :damvagewhen pressure israpplied tonit'thatwthepresent:in- Venti'on relates.

Accordingly, it isfthe general object of the. present'f'invention to provide a new and improved lockzsliderffor slideffasteners of the type disclosed intheaforementioned patent having a Safety feature'incorporatedto prevent 'damage to the locking portion vwhen .the slider is'subiected toiexcessive pressure such as bypressing.

his-another object of this'inventon to providean improved lockslider which .is simple :and :inexpen'sivefin its` constructon and, at the same time, Aa `slidenhaving--increased strength over prio-r looking-pull tab'zmembersof thefsame generaltype without in any 'waydecreasingi the efiicient locking operation thereof.

Various other objects andadvantagesofrthis invent-ion will be morev apparent` in the course of` thefollowing specification, and will be `particularly pointed out in theappended 'claims.

In the `accompanyingd1'awings,xthe1'e,.is .shown for the purpose of illustration,` an embodiment which my .in-`

vention may assume in'practice.

In .these drawings:

Fig. 1 is a-perspective view of 'thelimproved lock slider of the presentinvention showing the pullfitab'in locked position;

Fig. 2'is a perspective view similar `to Fig. l" showing the pull tab in its unlocked position;

Fig. 3 is aisectional view taken on line -3-3 of Fig. 1

i with a'fragmentary view of'a portion of a fastenerl'added;

e States Patent O 4=is a. zsectional view 'takenonrline' 41-4 zofFig. 2;

Big. 5. issa perspective view' of :the slider body 'inxaccordance with :the :present invention; and

Fig.: 6` is .avperspectiveview of :the pulltab member;

Referring'more.particularly. to the drawings,v theimprovednslider` of the vpresent invention:con1prises.-apair of :spaced-'apart :overlying- Wing :portons 22and:3.:integra1ly connecteditogethe'r at one :endby a neckA portion'4'aand havingL marginalfiangeportions r5 so as to provide substantially a Y-shaped channel 6between the. wingiportions.` .It'will'beunderstod that such a slider. isassembled fon the. stringers of a conventional :slide 4fastener (notzshown) 'for longitudinalimovement thereby. for engaging :and disengaging :the 'fastener elementsthereof`V in aimann'erwell:known'tothose sldlledin'the art.

According to the present invention; there .is arrangediin the upper Wing portion21centra'lly thereofarectangular- -shapedaperture 7 which communicates with the slider channel '6th'erein. There is arranged at opposite sides oflthis aperture 7,.a pair of upwardly extending spacedapart: lugs 81 which are ntegrally connected together at the .top 'thereofI by a` transversely` extending bar-like portionr9 which .bridges theaperture '7:'substantially centrally thereof. These lugs 8 and the barlikeiportion-lare .preferablyvstruck up zfrom the material of vthe wing l2 so .thatthey all overlie=the aperture t7i'ltherein.

Thereisprovided apullltab member 1'0 consistng of az plate-like body member having an arcuated` yieldable 'tongue-like looking cam portion 12 arranged centrally "slider'b'ody 'by-means of the 'trunnion portions 13-whch are *loose'ly land pivotally disposed in -undertthe respective lugs 8. In such position, it will be seen lthat'the-tongue- 'like lockingportion 12is-disposed directly oppositeethe transverse bar-like portion 9 'extending between the lugs 8. lt'wilalsofbe seen thatthe fcenters of the arcuated tonguelike locking portion 12 and thebar-'like transverse con- -necting portion-9 and the pivotal aXes of the trunnion portionssl 1 are all disposed in substantially the Vsame plane, as 'shown atlineA-A inFig. `4 of'th'e drawings.

In; one'position of the pull tab 10, that is, when-the pull'tab is disposed in its extreme unlocked or upward position, as=shown in Figs. 2 and 4, the tongue-like-'lock- Vingportion 12` thereof overlies and is disposed directly next to 'and-around this bar-like connectingportion. It will'be understood that it is the purpose of thistransverse .bar-likeconnecting portion 9 to lend'support to'the tongue-likeportion 12 when the pull tab is disposed in 'suchpositioml so as to preventit from'becoming deformed `when-eacessve-pressure isapplied to the locking'tongue and `slider such as occurs in a pressing operation. In otherwords, this bar-like portion supports this tonguelike portion 1`2`and1prevents it being bent downwardly between the lugs 8' when force is applied thereto so as ;to avoid the'-dan-gerV of destroying'of the locking feature 'off the slider.

When it is desired to lock the slider, it will be understood` that the pull tab 10 is manually operated and moved 'about its-pivotal connection With the lugs 8 to a downward'position substantially parallel to the slider wings, as'shown in Figs. 1 and 3, -whereby the lockingtongue- 'like-portion 12` is moved around to' the undersideof the bar-like `p.0rtion*9 between the lugs Sand passes into and throughthe aperture 7 and'into engagement with the fastener elements in the channel of the slider so as to lock the same against unintentional movement along the fastener in a well known manner.

As a result of my invention, it will be seen that there is provided a new .and novel lock slider for slide fasteners which is strong and rugged in its construction having an extremely high resistance to damage by pressing because of the safety feature of the transverse bar-like lug connecting portion 9. By providing such a construction, it Will be seen that the strength of the slider is substantially increased over prior locking pull tab members of the same general type without materially increasing the cost of manufacture thereof.

While I have shown and described one embodiment which my invention may assume in practice, it will be understood that this embodiment is merely for the purpose of illustration .and description, and that other forms may be devised within the scope of my invention as defined in the appended claims.

What I claim as my invention is:

1. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so .as to provide substantially a Y-shaped fastener element guide channel therebetween, one of said wings having an aperture thereing substantially centrallythereof, a pair of pull tab retaining lugs arranged at opposite sides of said aperture laterally thereof, a locking pull tab member hingedly connected to said slider body comprising a plate-like member having a locking portion at one end adapted to project through said aperture into said channel and a pair of opposed trunnion portions extending inwardly and transversely and disposed beneath said lugs, and transversely extending means arranged integral with said lugs and bridging said aperture at .a point directly opposite said locking portion, said locking portion positioned between said trunnion portions and being offset therefrom and adapted in one position of said pull member to extend around said transversely extending means whereby said locking portion is adapted to be supported and protected against destructive deformation upon application of destructive pressure to said locking portion and said pull tab.

2. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart wing portions connected at one end by a neck portion so as to provide substantially a Y-shaped fastener element guide channel therebetween, one of said wings having an aperture therein substantially centrally thereof, a pair of pull tab retaining lugs arranged at opposite sides of said aperture laterally thereof, a locking pull tab member hingedly connected to said slider body comprising a plate-like member having a locking portion at one end adapted to project through said aperture into said channel and a pair of opposed trunnion portions extending inwardly and transversely and disposed beneath said lugs, and a bar-like portion extending transversely between said lugs integrally connecting them together centrally thereof so as to bridge said aperture at a point directly opposite said locking portion, said locking portion positioned between said trunnion portions and being offset therefrom and adapted in one position of said pull member to extend around said transversely extending bar-like portion whereby said locking portion is adapted to be supported and protected against destructive deformation upon application of destructive pressure to said locking portion and 'said pull tab.

3. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so as to provide substantially a Y-shaped fastener element guide channel therebetween, one of said wings having an aperture therein substantially centrally thereof, a pair of full tab retaining lugs arranged at opposite sides of said aperture laterally thereof, a locking pull tab member hingedly con- 4 nected to Said slider body comprising a plate-like member having an arcuated yieldable locking tongue-like portion at one end adapted to project through said aperture into said channel and a pair of opposed trunnion portions extending inwardly and transversely and disposed beneath said lugs, and transversely extending means arranged integral with said lugs and bridging said aperture at a point directly opposite said tongue-like locking portion, said tongue-like locking portion positioned between said trunnion portions and being offset therefrom and adapted in one position of said pull member to extend around said transversely extending means whereby said locking portion is adapted to be supported and protected against destructive deformation upon application of destructive pressure to said locking portion and said pull tab.

4. In a slider' for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so as to provide substantially a Y-shaped fastener element guide channel therebetween, one of said wings having an aperture therein substantially centrally thereof, a pair of pull tab retaining lugs arranged at opposite sides of said aperture laterally thereof, .a locking pull tab member hingedly connected to said slider body comprising a plate-like member having an arcuated yieldable locking tongue-like portion at one end thereof adapted to project through said aperture into said channel 4and a pair of opposed trunnion portions extending inwardly and transversely therefrom and disposed beneath said lugs to either side of said locking portion, and a bar-like transverse portion extending between said lugs integrally connecting them together centrally thereof so as to bridge said aperture at a point directly opposite said locking portion, said arcuated tongue-like locking portion positioned between said trunnion portions and being offset therefrom and being disposed and movable around said transverse portion whereby said locking portion is adapted to be supported and protected against destructive deformation upon application of destructive pressure to said locking portion and said pull tab.

5. In a slider for slide fasteners, the combination as defined in claim 4, wherein the Centers of the arcuated tongue-like locking portion and the bar-like transverse connecting portion and the pivotal axes of the trunnion portions are all disposed in substantially the same plane.

6. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so as to provide substantially a Y-shaped fastener element guide channel therebetween, one of said wings having an aperture therein substantially centrally thereof, a pair of pull tab retaining lugs arranged at opposite sides of said aperture laterally thereof, a locking pull tab member hingedly connected to said slider body comprising a plate-like member having an arcuated yieldable locking tonguelike portion arranged centrally at one end thereof and disposed out of the plane of the body portion of said tab member and which is adapted to be disposed in one .position of said tab member in said aperture and extend into said channel and a pair of opposed trunnion portions extending inwardly and transversely and disposed beneath said lugs, said trunnion portions disposed substantially in the plane of the body portion of said tab member to either side of said locking portion, and a bar-like transverse portion extending between said lugs centrally thereof integrally connecting them together at the top thereof and bridging said aperture at a point directly opposite said locking portion, said arcuated tongue-like portion positioned between said trunnion portions and being offset therefrom, said arcuated tongue-like locking portion adapted to lie over and substantially next to said transverse portion when the pull tab is disposed in its unlocked `position substantially parallel to the slider wings whereby said locking portion is adapted to be supported and protected against destructive deformation by said transverse portion upon application of destructive pressure to said looking portion and said pull tab.

7. In a slider for slide fasteners, the combination as defined in claim 6, wherein the centers of the arcuated tongue-like locking portion and the bar-like transverse connecting portion and the pivotal axes of the trunnion portions are all disposed in substantially the same plane.

8. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so as to provide substantially a Y-shaped channel therebetween, one of said wings having an aperture therein substantially centrally thereof, a pull tab member, a log-like portion including transversely extending means bridging said aperture, said lug-like portion being open to either side thereof to which said pull tab member is hingedly connected to either side of said aperture by means of a pair of opposed trunnion portions disposed in said openings, and a Cam-like locking prong carried by said pull tab at one end thereof, said cam-like locking prong positioned between said trunnion portions and being offset therefrom, said looking prong disposed around said bridging means and adapted to extend through said aperture into said slider channel when said pull tab is disposed in one position and adapted to be disposed over said bridging means on the outer side thereof when said pull tab is disposed in another position.

9. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so as to provide' substantially a Y-shaped channel therebetween, one of said wings having an aperture therein substantially centrally thereof, a pull tab member, a lug-like portion including transversely extending means bridging said aperture, said lug-like portion being open to either side thereof to which said pull tab member is hingedly connected to either side of said aperture by means of a pair of opposed trunnion portions disposed in said openings, and an arcuated yieldable cam-like locking tongue carried by said pull tab at one end thereof which is disposed out of the plane of the body portion of said pull tab, said cam-like locking tongue positioned between said trunnion portions and being offset therefroin, said looking tongue disposed around said hridging means and adapted to extend through said vaperture into said slider channel in under said bridging means when said pull tab is disposed in one position, and adapted to be disposed over said bridging means on the outer side thereof when said pull tab is disposed in another position.

10. In a slider for slide fasteners, a slider body comprising a pair of overlying spaced-apart Wing portions connected at one end by a neck portion so as to provide substantially a Y-shaped fastener element guide channel therebetween, one of said wings having an aperture thereing substantially centrally thereof, a pair of pull tab retaining lugs arranged at opposite sides of said aperture laterally thereof, a pull tab member having a pair of spaced-apart opposed trunnion portions arranged at one end thereof, said trunnion portions positioned beneath said lugs so as to be hingedly connected to the slider body, an outwardly extending .arcuated cam-like locking portion carried by said pull member and positioned between said trunnion portions and out of the plane thereof, and a bar-like portion extending between said lugs and bridging said aperture at a point directly opposite said cam-like looking portion, said cam-like locking portion adapted to extend into said aperture and the slider channel in under the bar-like portion when said pull tab is disposed in its loeked position, and adapted to be disposed over said bar-like portion on the outer side thereof when said pull tab is disposed in its unlocked position.

References Cted in the file of this patent UNITED STATES PATENTS 1,862,196 Norton June 7, 1932 1,915,536 Johnson `Tune 27, 1933 l,936,095 Nicholson Nov. 21, 1933 2,223,279 Carlile Nov. 26, 1940 2,277,818 Carlile Mar. 31, 1942 2,322,847 Hartley June 29, 1943

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