US2270782A - Slider for separable fasteners - Google Patents

Description

Patented Jan. 20, 1942v SLIDER FOR SEPARABLE FASTENERS Delbert Gilmore, Erie, Pa., assignor'to Talon,

Inc., Meadville, Pa., a corporation of Pennsylvania Application July 15, 1940,`seria1 No. 345,470 j s claims.' (Cl. :a4-205.5)

My invention relates to slide fasteners of the type wherein rows of fastener elements are mounted on a pair of tapes and a slider embraces the rows of fastener members and slides along them for engaging and disengaging the fastener members.

More particularly my invention relates to an improved slider construction for such fasteners wherein the slider may be locked in place at the "desired position on the rows of fastener members.

It is an object of my invention to provide an -improved lock slider construction which shall be as thin as possible and substantially devoid of any projections on its outer surfaces such as lugs or loops which are often provided for attachingpull tabs an-d locking devices.

My invention provides a slider which can be very securely locked in any desired position in -which the locking device is not likely to become a-ccidentally disengaged. At the same time, there are no projecting lugs or other projections above the top surface of -the slider and all objection- Y able long pins. on the pull tab have been avoided.

In addition to the advantages of appearance, compactness, durability and reliability in operation, other objects and advantages of my invention will hereinafter more fully appear.

In the accompanying drawing I haveshown for purposes of illustration one embodiment and two modifications thereof which my invention may assume in practice. In the drawing: y

Fig. 1 is a perspective view of a small section of slide fastener equipped with my improved slider;

Fig. 2 is a longitudinal central cross-section through the slider detached from the fastener;

' Fig 3 is a perspective view showing three parts of the slider disconnected:

f bottom end of the slider.

wings with the outwardly flaring flanges and the neck I4 form an interior channel of generally Y-shape and the fastener elements of the separated fastener feed through the diverging branches of the slider channel and come together at about the central or crotch' portion of the Y, interengage and feed out through the narrow or The neck I4 is herein shown as projecting above the slider somewhat more than is usual and has a central vertical slot I5 extending therethrough and as a continuation of this slot there is an opening or slot I6 in the upper wing of the slider which extends a substantial distance .beyond the neck, that is, to

the crotch of the Y-shaped channel. A pull tab II has a lug or web I8 adapted to fit into the slot I5 and a pivot pin I9 extends through suitable aligned openings 20 in the slider neck I4 and in the pull tab tol furnish a pivotal connection of thepull tab to the slider. It will be observed that the pivotal axis is between the planes of the outer surfaces of the slider wings and that the wings are flat because they are devoid of any upstanding projections, loops, etc.,/ which are found in sliders now on the market. The slider body, and if desired, alsov the pull tab, are of such shape as to lend themselves to easy manufacture slider channel. This projection extends a sub- Fig. 4 isfa cross-section on line 3*-3 of Fig. .2

showin-g the fastener members in position in the slider and showing a modication;

Fig. 5 is a side view of a portion of Fig. 4;

Fig. 6 is a central vertical section through the slider with the locking member ln unlocked position;

Fig. 'I is a similar sectional view showing -a modified form #and with'the'locking member in locked position. v

The slide fastener with which I have shown. my invention is of a familiar type involving a pair of fabric tapes 8, 9 having attached to their adjacent edges the rows of fastener members l0k- 'I'he tapes have attached thereto suitable-stopv members including a bottom stop II/ and they are engaged and disengaged by movementjof av 55.

' tates movement of the slider along them `in a familiar manner. *The stantial'distance toward the narrow end of the lsliderlvfrom the neck I4 thus entering between the rows of fastener ,members I0 as best seen in Fig. 4, and because it extends to Ithe crotch of'l the Y-shaped I channel it will block the passage of the fastener members through the diverging branches of the slider channel and thus cause the slider to be locked in any tab is swung flat against Fig. 2. It will be noted that the locationiof the pivotal axis of'the pull the win-gs or neck and between the planes of the wings, as distinguished from its usual locatibn onaI lug which'projects from one wing, facilirelatively longer locking opening in the slider and lbetween the fastener members. This is due to the fact that the arc movement of the forward end of the locking projection is more nearly vertical Vwith rpect to the slider as it moves into and out of locking position.

The exact lengthwise with respect to the slider body may position where the pull projection through the mw neck construction I4. 'I'he two parallel 60 be determined by experiment andwlll vary to the slider, as shown inv tab at the rear end of place of the locking projection some extent depending upon the particular configuration of the slider and the shape of the substantially vertical position; -This facilitates operation of theslider especially .when being pushed downwardly. In sliders lof this type the fastener is opened by a pushing or shovel force applied tothe pull tab as distinguished from a tension applied to the narrow end as in some prising two rowsI of fastener members, a slider In some cases it is desirable'to provide a locking device which will spring automatically into operation without pushing by the user. To accomplish this purpose any convenient spring may be employed such as -a coil spring 24 around the pivot pin I9.

It will be observed that the neck I4 extends a substantial distance into rthe wings and thus the strength of vthe slider is not for many purposes too greatly affected by cutting the central slot, as shown in Figs. 2, 3 and 4. In cases, however, where it is desiredl to have greater in this slot so as to provide a central'portion 25 of the neck integral with the upper wing as well vas the lower wing. In this case the locking projection 26 instead of being formed as an',integra`l extension of the pivot lug 21. lsvformed asa separate projection extending throughva centrally aligned opening. The locking principle is substantially the same.

'I'he principle of locking employed which, so fa asl Iv amaware, is new, comprises means which in effect extendv the length of the wedge or neck 4 structure to a point where the, fastener members cannot move by., -It is believed that this type of locking member will be especially -advantageous in very small size fasteners or fasteners ofplastic material where it is difllcult to get a proper locking engagement between the fastener members themselves. Itis, of course, to be understood that the interlocking portionsv of the fastener ceptable fastener and for that reason there'is no room for any locking projection between the heads of the fastener members and the opposite tape. In very small fasteners, the locking pin in accordance with former lock slider constructions must be relatively short and the locking effect is therefore notso reliable. Furthermore, in the case of light weight pull tabs as `in small fasteners, my invention obviates all tendency for the lockingl pull t kick out of place because the long `'locking projection extending across the depth of the slider channel provides a very secure locking engagement. t v

Another advantage which may be mentioned is that a relatively thinner pull tab may beV made which will lie thin and-flat lagainstthe slider without any obstruction thus producing a streamline effect.. IfLdesired, thepull tab can be extended to cover the slider thus further enhanclng the appearance, and various decorative designs are also possible. The web on the pull tab strength as shown in Fig. 7 there may be a break Y in the preferred embodiment provides an excellent straightening element for such pull tabs when made of thin material. e

While I have shown and described one preferred embodiment and two modications thereoffwhich my invention may assume in practice,` it

will be understood that this embodiment and the movable alongsaid rows of. fastener members for engaging and disengaging the same, said slider comprising wings on opposite sides of the fastener member, a neck uniting said wings at one end,

said-slider defining a Y-shaped channel with dl.

verging branches on opposite sides of said neck, a pullrtab pivoted to the slider adjacent the neck which may be positioned at against ythe outer surface of one wing or swung upwardly toward a vertical position wlthrespect to the slider, such wingghaving` a centrally disposed opening therethrough at the crotchA of the Y and a centrally located lug on said pull tab which, when the pull tab is 'at against the slider, extends through l said opening substantially Aacross the depth of lthe slider channel at the crotch of the Y and between two rows of fastener members therein to prevent engagement of the fastener members andk thus cause locking of the slider, said locking lug being movable out of locking position when the pull tab is lifted tol move the slider, the pivotal connecting means for the pull tab being located between the planes pf the outer surfaces 0f said '50 members are quite short in any commercially acslider wings. I

2. Aslider for slide fasteners of the class de stantially Y-shaped channel between the wings,

said neck. and adjacent portions of the wing being provided with a longitudinally extending slot extending a substantial distance beyond the neck, a locking member pivotally mounted on-the slider neck and having an inwardly projecting lug which extends through said slot beyond the neck to block the slider channel where the diverging branches of the Y-shaped channel meet, the pivotal connecting meam for the locking member being located between the planes of the outer surfaces of said wings.'

3. `A slider for slide fasteners of the class described comprising parallel overlying wings connected-by a neck atene endj and dening a substantially Y-shaped channel between the wings,-

'- depending pivot lug'tting in the slotted neck,

and means for pivotally'connecting the same thereto, and a projection formed as an integral continuation of said lug and movable through the slot in the wing into position between twov rows of fastener members in the crotch portion of the slider channel to block their movement in the slider at the point where the fastener elements intermesh.

DELBERT B. GILMORE.

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