US2293448A

US2293448A - Flush pull slider for slide fasteners

Info

Publication number: US2293448A
Application number: US390905A
Authority: US
Inventors: Ulrich Frederick
Original assignee: Conmar Products Corp
Current assignee: Conmar Products Corp
Priority date: 1941-04-29
Filing date: 1941-04-29
Publication date: 1942-08-18
Anticipated expiration: 1959-08-18

Description

' Aug. 18, 1942.

F. ULRICH FLUSH PULL SLIDER FOR SLIDE FASTENERS Filed April 29, 1941 FREDERICK ULRICH Fi INVENTOR ATTORNEYS Patented Aug. 18, 1942 FLUSH PULL SLIDER. FOR SLIDE FASTENERS Frederick Ulrich, Bayonne, N. J., assignor to onmar Products Corporation, Bayonne, N. J., a

corporation of New Jersey Application April 29, 1941, Serial No. 390,905

(or. 24-2o5') 11 Claims.

This invention relates to slide fasteners, and more particularly to sliders therefor. A conventional slider for a slide fastener has a pull or finger piece pivotally mounted on top of the slider.

this construction is objectionable.

ironing the same.

extending all around the slider.

ing cam or locking tooth.

foregoing difficulties and disadvantages.

ing features of my invention;

Fig. 2 is a side elevation of the slider;

plane of the line 3-3 of Fig. 1;

looking at the underside;

and pull;

Fig.7 is a. side elevation of the same The slider body is usually pro- 5 vided with an upstanding lug or projection on slider is that the top wall i2 is smooth and fiat, which the pull is pivoted. For some purposes, there being no'upwardly projecting lug for the When the finger piece or pull. Instead, the pull I8 is disfastener is used on a garment having a cloth posed below and substantially flush with the top flap overlying the same, the lug raises the cloth 10 of the slider. ,It is pivoted to the lower end of noticeably, and what is even worse, mars .and the slider, and so may be turned from the flat may even tear through the cloth .when the garposition shown at l8 in Fig. 2, to the transverse ment is treatedv under heavy pressure, as when or broken-line position movement of the slider along the slide fas- In an effort to overcome this difficulty, it tener. The fastener may be conventional, and has been suggested to use a flush pull, said pull as shown in Fig. 1, comprises tapes 2!] pro- This construcvided with cords or beads 22 at their inner edges tion, however, introduces disadvantages of its on which the fastener elements 24 are clamped. own, because it widens the over-all width of the The lower end of the slider is only slightly wider slider; it makes it difficult to stitch the tapes of than the width of the engaged fastener elements, the slide fastener to the garment by lines of and the pull I8 is preferably no wider than the stitching located as closely to the fastener elelower end of the slider, and therefore is itself ments as is desired; and it becomes impossible only slightly wider than the interlocked fasto provide the pull with a practical form of locktener em as will b een at the b ttom 25 of Fig. l. The object of the present invention is to pro- To secure the pull to he Sl de e ower e d vide a flush pull slider which will overcome the of the top wall of the slider and the upper end of the pull are matingly cut away and inter- To the accomplishment of the foregoing genfitted when viewed in plan, the interfitted parts eral object, and such other more specific obein pivo d h r on a transverse axisjects as will hereinafter appear, my invention Considering Figs. 1, 2 and 3 more specifically, consists in the slider elements and their relathe top wall ofthe slider is cut away at 26 and tion oneto the other, as hereinafter are more 28, thus leaving a downwardly projecting lug particularly described in the specification and 30. The upper' end of the pull i8 is. notched sought to be defined in the claims. The .specior cut away at 32 to fit around the lug 30. The fication is accompanied by a drawing, in which: parts or arms are secured together by 8- D Fig. -1 shows a slider construction embodv- 34. The ends of the pin. are exposed in Fig. 1

- in order to clarify the construction, but in practice, these ends may, of course, be terminated Fig. 3 is a section taken approximately in the 40 flush with the edges of the p ll- One important advantage of the present con- Fig. 4 shows the lower end of a modified slider; struc'tion is the ease with which appropriate Fig. 5 shows the upper end of a modified pull, locking means may be provided.

spaced arms formed at the upper end of the pull Fig. 6 shows the assembly of modified slider may be coined or upset to form cams 36 which are adapted to bear tightly against the fastener elements when the pull is in fiat position. It Fig. 8 is a modification using .a pin lock; and should be noted that the center of pressure of Fig. 9 shows the under side of the pull usedin the cam is preferably offset from and is preferably below the axis of pin 34, so that the device Referring to the drawing, and more particuwill be self-locking once the pull has been turned larly to Figs. 1, 2 and 3, the slider comprises a down. For the fastener to open, the slider must downwardly flanged top wall l2 and an upwardmove relatively downward, or the fastener elely flanged bottom wall ll joined together at a ments must move relatively upward, and any neck portion I6. In the particular slider body attempted relative movement of this kind tends here shown, the neck portions are indented, and are secured together by welding, but other conventional slider constructions may equally well be employed.

The characteristic feature of the present I8, preparatory to Thus, the

to swing the lower end of the pull downwardly (I. against the fastener. It may also be mentioned that the locking action is improved or tightened because one of the cams will bear directly on a fastener element when the other moves between elements, this being due to the staggered relation of the elements. Finally, it

may be observed that the cams 36 shown in Figs. 1, 2 and 3 are particularly blunt, so that the lock will in this particular case act as a friction lock which will yield under an excessive or emergency pull on the slide fastener, without .inJuring the fastener. The present arrangement through 7 of the drawing. As before, the slider is provided with a top wall 40 and a bottom wall 12 joined at a neck portion 44, and the lower end v of top wall 40 is provided with a downwardly extending lug or projection 46, located in the plane of the wall. The pull 8 is bifurcated to form arms 50, each of which carries an inwardly as a similar pin, if symmetrically located at the other side of the pull, would tend to close on top of an element instead of between elements. This, while entirely feasible with a cam-shaped lock of moderate radius, cannot be done with a real locking tooth or pin of substantial length.

It is believed that the construction and operation of my improved flush pull slider for slide fasteners, as well as the advantages thereof, will be apparent fromthe foregoing detailed description. The pull is flush with the slider, and both have a smooth, flat top surface. The pull is no wider than the narrowest part of the slider, and is substantially as narrow as the interlocked rows of elements. Thus no objectionable bumps will be caused on a garment using this slider, and no injury to the fabric will result during ironing. The tapes of the fastener may be stitched to the garment reasonably closely to the fastener elements. The slider may, if desired, be provided with locking means, and various forms of locking cams and teeth may be employed.

directed trunnion 52 formed integrally the:re-.

with. These arms are preliminarily spread to the diverg Dflsition shown in Fig. 5. The side edges of the lug 46 are indented to form sockets or holes 54 dimensioned to receive the trunnions 52. In practice, the pull may be added tothe slider by means of a suitable fixture or die which positions thespread arms 50 astride the lug ll, then heads the arms toward .one another to the parallel position shown in Fig. 6, thus forcing the trunnions 52 into the bearing holes in lug 46.

The modified slider shown in Figs. 4 through 7 differs in several other minor respects. One is that the lug 46 in this case is projected downwardly from the lower end of the slider, instead of being formed by cuttingaway a part of the top wall of the slider. Thus the working length of the flanges of the slider is the same at the top and bottom, whereas in the arrangement It Will be understood that the variant features disclosed in the drawing are interchangeable with one another. Thus, trunnions formed integrally with the pull may be used with the relatively flat cams or friction-lock shown in Fig. 2, and may be used with the shortened top wall shown in Fig. 2. Similarly, the positive locking tooth or pin of 8 may be used with either the shortened top wall of Fig. 2, or the separate pivot pin of Fig. 2, or both. when a cam lock shown in Fig. 2, the flanges at thetop of the slider are shorter than those at the bottom, Another difference which will be clear from inspection of Fig. 'I,is that the locking cams 56 are made more acute, thus giving the slider a more positive locking action. As before, the high point of the cam is preferably located below the axis,

so as to make the slider self-locking once the pull has been nearly onwhollyturned down. The choice of cam shape, as between'the' flat cam of Fig. .2 and the steeper cam of Fig. 7, depends on whether the slider is to act as a friction lock or as a positive lock.

The flush pull slider of my invention may also be provided with a pin look. This is shown in Figs. 8 and 9, in which the slider comprises flanged top and bottom walls 58 and 80 Joined at a neck portion 82. As before, the top wall is flat, and isprovided with a downwardly extending lug N. --The pull OI is bifurcated to straddle the lug N, and may be provided with integrally formed trunnion's 08, all as previously described. One of the arms 0 of the pull is projected beyond the trunnion I8, and is transversely bent to form a locking toothll. This locking tooth is employed, a. single cam may, if desired, be used instead of a double cam, although I believe the latter preferable.

With a cam lock, it is preferable to' back up the fastener elements by means of the back wall of the slider, as shown in Fig. 3. The back wall may be extended downwardly without side flanges, if desired. If the back wall is not extended downwardly, as shown in Fig. 7, thenthe cam 56 should be given a substantial rise, because the grip against opening will depend primarily on oifsetting or kinking the stringers at the lower end of the slider. For this kind of locking action, it is also better to provide a nearly square corner at the .point 43 instead of a bevelled edge as shown in Figs. 2 and 8.

If the back wall of the slider is not to be extended downwardly, then the hooked pin lock shown in Fig. 8 is the most satisfactory, as'it,

tends to lock independentlyof the back wall, assuming, of course, that thelocking having advantages even for such pin-poses or apelements, and so acts as. typical pin lock. It

should be noted that with the pin type of lock,

plications as do not require the use of a lock. The advantageof having a flush pull and also, the advantage of having a locking slider with a flush pull are, of course, not limited to the par- 'ticular shape and dimension of the pull shown, in which the pull has the same width as the lower end of the slider. When the slider is unconventionally shaped, the pull may-be adapted to the shape of the lower end of such an un-. conventional slider, so as to give the slider a, pleasing appearance. The upper end of the pull may, for this purpose, require a widtheither wider or narrower than the interlocked fastener elements, instead of substantially equalling the interlocked fastener elements, as here shown. I It will therefore. be apparent that while I have shown and described my invention in several the pin is provided at only one side of the pull, 15 preferred forms, many changes andmodinc'ations.

, .pin is ve y Y near the lower end of the slider. I

1. A slider for a slidefastener, said slider comprising top and bottom walls, and a pull, said pull being disposed in alignment with the lower end of the top wall of the slider, whereby said slider and pull in combination have a flat top surface, the lower end of the top slider wall being cut away when viewed in plan, and the upper end of the pull being matingly cut away and interfitted with the cut-away lower end of the top slider wall when viewed in plan, the interfltted parts being pivoted together on a transverse axis so as to permit the pull to be turned from its flat position to a transverse workingposition, preparatory to movement of the slider.

2. A slider for a slide fastener, said slider comprising top and bottom walls having downwardly converging flanges and joined at their upper end by a neck portion, and a pull for operating said slider, said pull having a width approximately equalling the width of the lower end of the slider and being disposed in alignment with the lower end of the top wall of the slider, whereby said slider and pull in combination have a flat top surface, the lower end of the top slider wall and the upper end of the pull both being matingly cut away and interfitted when viewed in plan, the lnterfitted parts being pivoted together on a transverse axis so as to permit the pull to be turned from a flat position substantially flush with the top of the slider to a transverse working position, preparatory to movement of the slider.

3. A slider for a slide fastener, said slider comprising top and bottom walls, and a pull, said pull being disposed in alignment with the lower end of the top wall of the slider, whereby said slider and pull in combination have a relatively fiat top surface, the top slider wall being provided with a lug projecting from its lower end in the plane of the wall, said lug being substantially narrower than the slider wall, the upper end of the pull being bifurcated to form arms dimensioned to straddle the aforesaid lug, said arms having trunnions forined integrally with and projecting inwardly therefrom, said lug having bearing holes in the side edges thereof receiving the aforesaid trunnions, whereby said pull may be turned from a flat position substantially flush with the top of the slider to a transverse working position, preparatory to movement of the slider.

4. A slider for a slide fastener, said slider comprising top and bottom walls having downwardly converging flanges and joined at their upper end by a neck portion, and a pull for operating said slider, said pull having a width approximately equalling th'e width of the lower end of the slider and being disposed in alignment with the lower end of the top wall of the slider, whereby said slider and pull in combination have a, relatively flat approximately flush top surface, the lower end of the top slider wall being notched or cut away at the sides to form a projecting lug, the upper end of the pull being slotted to form arms dimensioned to straddle the aforesaid lug, sa d arms having trunnions formed integrally with and projecting inwardly therefrom, said lug having bearing holes in th'e side edges thereof receiving the aforesaid trunnions, whereby said pull may be turned from a flat position substantially flush with the top of the slider to a transverse working position, preparatory to movement of the slider.

5. A locking slider made in accordance with claim 1, in which the upper end of the pull immediately adjacent the transverse pivot is provided with locking means dimensioned to engage the fastener elements when the pull is in fiat position, but disengaged from the fastener elements wh'en the pull is turned to transverse position.

6. A locking slider made in accordance with claim 1, in which the upper end of the pull is provided with locking means dimensioned to engage the fastener elements when the pull is in flat position, but disengaged from the fastener elements when the pull is turned to transverse position, said locking means comprising one or more cam-like projections located at the upper end of the pull immediately adjacent the transverse pivot.

7. A locking slider made in accordance with claim 1, in which the upper end of the pull is provided with locking means dimensioned to engage the fastener elements when the pull is in flat position, but disengaged from the fastener elements when the pull is turned to transverse position, said locking means comprising a locking tooth or pin located at the upper end of the pull immediately adjacent the transverse pivot.

8. A locking slider made in accordance with claim 3, in which th'e upper end of the pull immediately adjacent the transverse pivot is provided with locking means to engage the fastener elements of a slide fastener when the pull is in flat position, but disengaged from the fastener elements when the pull is turned to transverse position.

9. A locking slider made in accordance with claim 3, in which the upper end of the pull immediately adjacent the transverse pivot is provided with locking means to engage the fastener elements of a slide fastener when the pull is in fiat position, butdisengaged from the fastener elements when the pull is turned to transverse position, said locking means. comprising one or more cam-like projections formed integrally with and projecting from the arms of the pull.

10. A locking slider made in accordance with claim 3, in which the upper end of the pull immediately adjacent the transverse pivot is provided with locking means to engage the fastener elements of a slide fastener when the pull is in ilat position, but disengaged from the fastener elements when th'e pull is turned to transverse posiprojecting from its lower end in the plane of the wall, said lug being substantially narrower than the slider wall, the upper end of the pull being bifurcated to form arms dimensioned to straddle the aforesaid lug, and means pivoting. the arms to the lug, whereby said pull may be turned from a flat position substantially flush with the top of the slider to a transverse working position, preparatory to movement of the slider.

FREDERICK ULRICH.