US2521651A

US2521651A - Slider for slide fasteners

Info

Publication number: US2521651A
Application number: US60478A
Authority: US
Inventors: Noel J Poux
Original assignee: Talon Inc
Current assignee: Talon Inc
Priority date: 1948-11-17
Filing date: 1948-11-17
Publication date: 1950-09-05
Anticipated expiration: 1967-09-05

Description

Sept. 5, 1950 N. J. POUX 2,521,651

SLIDER FOR SLIDE FASTENERS Filed Nov. 17, 1948 IN VEN TOR.

Noel J Pour.

' TTORNE).

Patented sq. s, 1950 sunna non SLIDE FASTENERS Noel J. You, Meadville, Pa., assignor to Talon, Inc., a corporation of Pennsylvania Application November 17, 1948, Serial No. 60,478

13 Claims.

This invention relates to slide fasteners, and particularly to an improved automatic lock slider therefor.

It is one of the objects of the present invention to provide an improved automatic or self-locking slider for slide fasteners which is simple and inexpensive in its construction and manufacture and, at the sametime, durable, efficient, and effective in its operation and use.

It is another object of the invention to provide such a lock slider which embodies such features of construction as to increase materially the ease and convenience of assembling the component parts thereof and, consequently, reducing materially the manufacturing costs of such a slider.

Various other objects and advantages of this invention will be more apparent in the course of the following specification, and will be particularly pointed out in the appended claims.

In the accompanying drawings, there is shown for the purpose of illustration, an embodiment and a modification thereof which my invention may assume in practice.

In these drawings:

Fig. 1 is a plan view of a slide fastener having the improved lock slider of my invention incorporated therewith;

Fig. 2 is a side view of the fastener and slider, as shown in Fig. 1, showing the locking cap member in its locked position;

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2;

Fig. 4 is an enlarged side view of the upper portion of the slider of the present invention, showing the locking cap member in its unlocked position;

Fig. 5 is a sectional view taken on line 5--5 of Fig. 4;

Fig. 6 is a perspective view of the locking spring member in accordance with my invention; and

Fig. 7 is an enlarged side view of a modification of the slider of my invention, showing the locking cap member in its normal or locked position.

In United States Letters Patent No. 1,966,457, granted July 17, 1934, to Samuel H. Norton and Peder Nedal, there is shown an automatic lock slider for slide fasteners wherein the locking member is in the form of an elongated hollow sheet metal cap-like member which overlies a longitudinally extending lug on the top wing of the slider body and is pivotally secured thereto at one end thereof. The free end of the locking member is provided with a locking prong or projection adapted to project into the channel of the slider into locking engagement with the fastener elements of the fastener.

In order to projectthe locking projection of the locking member into'locking engagement with the fastener elements, the locking member is maintained normally in locking position by a leaf spring secured to the upper side of the longitudinally extending lug and abutting the inner top wall of the locking member for constantly biasing the locking member about its pivotal connection toward locking position. Because of their small size, it is extremely difficult to handle and assemble such leaf springs which must be attached to the lug of the slider before the locking member is assembled thereon and attached thereto. Also, the positioning of the leaf spring on the top side of the lug tends to increase the overall thickness of the slider which is, of course, objectionable. According to the present invention, these difficulties and objections are eliminated by the use of a relatively large leaf spring member which can be easily handled and attached to the slider body and which is positioned between the body of the slider and the bottom of the locking member so as to reduce to a minimum the overall thickness of the slider.

Referring more particularly to the drawings, there is shown in Fig. 1, a conventional type of slide fastener comprising cooperating rows of spaced interlocking fastener elements 2 attached to opposed beaded edges of tapes or stringers I. There is arranged on the rows of fastener elements, a. slider, generally designated at 4, for longitudinal movement in opposite directions therealong for opening and closing the fastener in a manner well known to those skilled in the art.

Such a slider consists generally of a channeled body member consisting of spaced-apart upper and

lower wings

5 and 6, respectively, which are flanged at opposite edges, as at 1, and connected at the top end thereof by means of a V-shaped neck 8 so as to provide a Y-shaped channel within the slider body.

According to the present invention, there is positioned on the outer side of the top or upper wing 5 of the slider body centrally thereof, a pair of spaced-apart longitudinally extending lugs 9 and I0 so as to provide an opening I2 therebetween for a purpose hereinafter to be described. There is mounted on the lugs 9 and ill, a caplike looking member 13 which is preferably a hollow sheet metal member having a front wall l4, a rear wall I5, and sidewalls Hi. There is arranged with each of the side walls iii in staggered relation, a locking projection or prong I! which extends into and through an opening I! in the upper or top wing 5 of the slider with the extreme end of the prong projecting into the channel of the slider body so as to lock the slider in a manner well known. The locking member I! is pivotally attached adjacent the rear end thereof to the rear lug In by projections l9 extending into holes i9a, as shown in Fig. 3. The front lug 9 is preferably undercut, as at 20, so as to provide a projecting portion 2| which cooperates with the inturned lip or shoulder 22 of the front wall l4 so as to limit the outward movement of 3 the locking member. There is provided a pull member it having a trunnion portion 24 which is disposed in the space it between the lugs O and II, with this trunnion portion cooperating with the inclined surface II on the side walls ll of the locking member to lift the same upwardly so as to release the locking projections I! from engagement with the fastener elements when it is desired to move the slider therealong.

There is provided an elongated leaf spring member N, as clearly shown in Fig. 6, having a rectangular-shaped aperture 21 arranged therein adjacent one end thereof and having a forwardly projecting portion 28 on one side of the aperture, and a rearwardly projecting portion 1! on the opposite side thereof. This leaf springmember is made preferably of relatively thin spring steel and is positioned on the slider body with the rear lug il extending up through the aperture 21 so that the spring is disposed around the lug with the forwardly projecting portion 18 positioned in the space I! between the lugs I and II, as clearly shown in Figs. 4 and 5 of the drawings. There is provided preferably a groove or recessed portion ill in the top wing of the slider in which the leaf spring member is disposed. It is preferable that the distance, which is designated at a, from the extreme front end of the forwardly projecting portion 2! to the front end of the aperture 21 in the leaf spring be slightly greater than the distance between the two lugs I and I0 so that this forwardly extending portion will fit tightly therebetween. Each of the lugs I and I0 is struck up and downwardly, as at II, .over the top of the forwardly rojecting portion 28 so as to hold securely the leaf spring in position on the slider body. When the leaf spring is forced into position, as described, it'has been found that the rearwardly projecting portion 29 will turn or bow upwardly, as clearly shown in Fig. 2, so as to abut the lower under side of the rear wall I! of the locking member II, as at 32. It will be understood that the aperture 11 in the leaf spring 26 is slightly larger than the rear lug ill so as to provide clearance, as at 33, between the rearwardly extending portion 2! and the lug whereby free movement of this end of the leaf spring relative to the lug II and the slider body is permitted.

In assembling the slider, it will be understood that the leaf spring member 28 is first assembled thereon, as described, and that the locking member it, together with the pull member 23, is then mounted thereon with the trunnion portion of the pull member 24 being positioned in the space I! between the lugs 9 and iii and between the locking member it and the inclined surfaces II of the side walls It of the locking member.

In actuating the slider by means of the pull member 23 to open the fastener, it will be seen that the trunnion portion 24 of the pull cooperates with the inclined surfaces 25 of the side walls of the locking member to move the same about its pivotal connection ll whereby the locking projections I! are moved out of engagement in the slider channel with the fastener elements therein. When the pull member is released, it will be understood that the locking member I! is moved to its locked position about the pivotal connection II by the action of the rearwardly projecting portion 2! of the leaf spring member 28 which at all times abuts the under side of the rear wall I! of the locking member so as to hold normally the locking projection I! in locking position in the channel of the slider.

InPigJofthedrawinIathereisshownaslight modification of the lock slider of my invention. In this construction, the leaf spring member 2| rests on the top surface of the u per or top wing lofthesliderinsteadofbcingdisposedina groove or slot in the surface thereof, as in the preferred embodiment.

As a result of my invention, it will be seen that there is provided an improved automatic lock slider for slide fasteners having a pring member which can be conveniently and easily attached to the slider body. It will also be seen that by providlng such a construction that the overall thickuses of the slider is reduced to a minimum primarily due to the location of the spring, which is a decided advantage especially in the assembly and functioning of relatively small sliders.

While I have shown and described several embodiments which my invention may assume in practice, it will be understood that these embodiments are 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 slide fastener of the class described, a slider body having a channel therein for receiving the fastener elements, a lug projecting from the upper wing of said slider body, an elongated locking member having one end thereof pivotally connected to said lug and a locking projection arranged on the opposite free end of said member which is adapted to project into the channel of said slider, a flat leaf spring member mounted on said slider body and disposed directly next to the upper wing thereof and extending around said lug to the outer side thereof with the free end thereof abutting the under side of said locking member on the outer side of said lug and acting on said member to hold the same normally in locked position, and means for moving said locking member to unlocked position automatically when the slider is manipulated to operate the fastener.

2. In a slide fastener of the class described, a slider, as defined in claim 1, including another lug arranged on the top wing of said slider and spaced from said first mentioned lug with the locking member bridging said lugs, and means carried by said second mentioned lug for limiting the outward movement of said locking member with the pull movably connected to said locking member between said lugs by the bridging action of said locking member.

3. In a slide fastener of the class described, a slider having a channel therein for receiving the fastener elements, a lug projecting from the upper wing of said slider, an elongated locking member having one end thereof pivotally connected to said lug and a locking projection arranged on the opposite free end of said member which is adapted to project into the channel of said slider, a flat leaf spring member di:posed directly next to the upper wing of said slider and attached thereto to the inner side of said lug and extending around to the opposite side thereof with the free end thereof abutting the under side of said locking member on that side of said lug and acting on said member to hold the same normally in locked position, and a pull member movably attached to said locking member and adapted to move the same to unlocked position automatically when the pull is manipulated to move the slider along the fastener.

4. In a slide fastenerof the class described, a

slider having a channel therein for receiving the fastener elements, a lug projecting from the upper wing of said slider, an elongated locking member having one end thereof pivotally connected to said lug and a locking projection arranged on the opposite free end of said member which is adapted to project 'nto the channel of said slider, a flat leaf spring ember attached to said slider to one side of said lug with the free end thereof ex: tending to the opposite side of said lug and having an aperture arranged therein through which said lug extends so that said spring is disposed around said lug, the free end of said spring abutting the under side of the locking member adjacent the end thereof on that side of the lug and acting to hold the same normally in locked position, and a pull member movably attached to said locking member and adapted to move the same to unlocked position automatically when the pull is manipulated to move the slider along the fastener. I

5. In a slide fastener of the class described, a slider having a channel therein for receiving the fastener elements, a pair of spaced-apart lugs projecting from the upper wing of said slider, an

elongated locking member having one end thereof pivotally connected to one of said lugs and a locking projection arranged on the opposite free end of said member which is adapt d to project into the channel of said slider, a fiat leaf spring member having a portion thereof disposed in the space between the lugs and attached thereto so as to lie directly next to the body of the slider, another portion of said leaf spring extending outwardly and upwardly to a point around and beyond that lug to which said locking member is pivotally connected and abutting the under side of said locking member on that side of said lug and acting on said member to hold the same normally in locked position, and means for moving said locking member to unlocked position.

6. In a slide fastener of the class described, a slider as defined in claim 5, including means carried by the other of said outwardly projecting lugs for limiting the outward movement of said locking member.

7. In a slide fastener of the class described, a slider as defined in claim 5, wherein the locking member bridges the space between said lugs and a pull member having the trunnion portion thereof loosely disposed in said space so as to be attached to said slider between said lugs by said locking member which is secured movably to said lugs.

8. In a slide fastener of the class described, a

slider having a channel therein for receiving the fastener elements, a pair of spaced-apart lugs projecting from the upper wing of said slider, an elongated locking member having one end thereof pivotally connected to one of said lugs and a locking projection arranged on the opposite free end of said member which is adapted to project into the channel of said slider, a flat leaf spring member having a portion thereof disposed between the space between said lugs so as to lie directly next to the body of the slider and attached securely thereto, another portion of said leaf spring straddling that lug to which said looking member is pivotally connected and extending outwardly and upwardly to a point around and therebeyond so as to abut the under side of said locking member on that side of said lug and acting on said member to hold the same normally in locked position, and means for moving said locking member to unlocked position.

9. In a slide fastener of the class described, a slider as defined in claim 8, wherein the locking member bridges the space between said lugs and a pull member having the trunnion portion thereof loosely disposed in said space so as to be attached to said slider between said lugs by said locking member which is secured movably to said lugs. V

10. In a slide fastener of the class described, as defined in claim 8, wherein the material on the inner side of the lugs is struck up to hold the leaf spring member securely in position in the space between said lugs.

11. In a slide fastener of the class described, a slider having a channel therein for receiving the fastener elements, a pair of spaced-apart lugs projecting from the upper wing of said slider, an elongated locking member having one end thereof pivotally connected to one of said lugs and a locking projection arranged on the opposite free end of said member which is adapted to project into the channel of said slider, a leaf spring member having an aperture arranged therethrough disposed directly next to the body of said slider between the same and said locking member, one end portion of said spring member between said aperture and one end thereof being disposed between said lugs in the space therebetween and attached to said slider between said lugs with the lug to which said locking member is pivotally connected extending up through said aperture so that the leaf spring lies therearound the other end portion of said locking member extending upwardly and outwardly to the side of the opposite side of said lug abutting the under side of said locking member adjacent the end thereof and acting on said member to hold the same normally in locked position, and means for moving said locking member to unlocked position.

12. In a slide fastener of the class described, a slider as defined in claim 11, wherein the locking member bridges the space between said lugs and a pull member having the trunnion portion thereof loosely disposed in said space so as to be attached to said slider between said lugs by said locking member which is secured movably to said lugs.

13. In a slide fastener of the class described, a slider as defined in claim 11, wherein the leaf spring member is disposed in an elongated recess in the top wing of the slider.

NOEL J. POUX.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,966,457 Norton et al. July 17, 1934 2,234,939 Hatch Mar. 11, 1941 2,289,955 Berg July 14, 1942 2,296,823 Carlile Sept. 29, 1942 FOREIGN PATENTS Number Country Date 506,363 Great Britain of 1939 828,314 France of 1938