US2044191A

US2044191A - Separable fastener

Info

Publication number: US2044191A
Application number: US725414A
Authority: US
Inventors: Sundback Gideon
Original assignee: Hookless Fastener Co
Current assignee: Hookless Fastener Co
Priority date: 1929-12-21
Filing date: 1934-05-14
Publication date: 1936-06-16
Anticipated expiration: 1953-06-16

Description

SEPARABLE FASTENER Original Filed Dec. 21, 1929 mm. m d mm S n o e G Patented June 16, 1936 ABLE FASTENER Gideon Sundback, Meadville, Pa., assignor to Hookless Fastener Company, Mcadville, Pa... a corporation of Pennsylvania Original application December 21, 1929, Serial No. 415,721. Divided and this application May It, 1934, Serial No. 725,414

4 Claims.

This invention relates to slide fasteners and particularly to locking devices on sliders for such fasteners, this application being a division of my Patent No. 1,967,137, issued July 17, 1934.

One of the objects of invention is to provide an improved and simplified construction of locking device for preventing unintended opening of the slide fastener.

Another object is to provide an improved arrangement of combined locking and pull-attaching member for sliders.

More specifically it is an object to provide an improved locking member normally held in looking engagement with the fastener elements and adapted to be automatically released by the slider actuating member or pull.

It is also an object to provide means for moving the locking member out of locking position, not only to permit opening the fastener, but also when closing the fastener to prevent dragging of the locking member along the interlocking elements.

Other objects and advantages of my invention will appear more fully during the course of the following specification.

In the accompanying drawing I have shown for purposes of illustration, several embodiments which my invention may assume in practice. In this drawing:

Fig. l is a general plan view of a slide fastener embodying the invention;

Fig. 2 is a plan view of one form of slider embodying the invention, detached from the "fastener;

Fig. 3 is a longitudinal sectional view of the slider on the line 33 of Fig. 2, with the locking member in released position;

Fig. 4 is a section on the line 5-4 of Fig. 1, showing the slider locked; and

Fig. 5 is a sectional view, corresponding to Fig. 3, of amodified structure embodying the invention.

The fastener illustrated in Fig. 1 is of a well known type generally similar to the fastener disclosed in my Patent No. 1,219,881, March 20, 1917. A fastener of this type usually comprises a pair of stringers l5 and it having corded edges H to which are attached, in spaced relation, the

fastener elements Hi. The fastener elements are alike on both stringers and are arranged in staggered relation so as to come together and interlock properly. The engagement and disengagement of the fastener elements are controlled by the movement of a slider l9 which embodies a body portion having substantially parallel spaced wings and 2| joined by an integral wedging and spacing portion 22. It will be noted that the slider is wider at its rear end than at its front end to provide a substantially Y-shaped channel through which the fastener stringers pass during travel of the slider.

In the embodiment disclosed in Figs. 1 to 4 of the drawing, a combined pull attaching and looking member 2d is attached at one end to the slider by means of laterally projecting pivot bearings 25 engaging under a pair of ears 26 which are cut out of the top wing of the slider and bent upwardly to the desired shape. The other end of the locking member is formed into a locking point 21, which engages with a fastener element in one of the rows, as shown in Fig. 4, to prevent opening of the fastener. If desired a second locking point may be formed on the locking member to engage a corresponding fastener element in the other row. The locking member includes a portion 28 which extends substantially parallel to the slider and

inclined cam portions

29 and 30. The front end of the member carrying the point 21 is movable relative to the slider and is normally held t in locking engagement with the fastener elements, as shown in Fig. 4, by the weight of the locking member itself. The portion 28 is offset from the line joining the pivots 25 and the looking point 21 so that the weight of the locking member causes the locking point to drop into locking position even when the slider is upright. The locking point 21 projects through an opening 3! having inclined walls which function both as a positive stop to limit upward movement, and as a shield for the locking point. A combined pull or slider actuating member and lock controlling device 33 is separate from and movably connected to the slider solely by means of the locking member 24. The pull 33 has a portion 38 disposed between the locking member and the slider body and this portion engages the cam portions 29 and of the locking member when the pull is moved to the end of its travel, thereby lifting the looking point 21 out of engagement with the fastener elements. Thus when it is desired to open the fastener, the slider actuating member is pulled in a direction tending to open the fastener and the force exerted on the cam portion 29 lifts the locking point out of locking engagement and permits the fastener to be opened. When it is desired to close the fastener, the slider actuating member is pulled in a direction tending to close the fastener, as shown by the dotted lines in Fig.

3, and the force of the pull acting on the cam portion 80 lifts the locking point out of engagement and prevents its dragging along the fastener elements as the fastener is being closed.

In assembling the locking member with the slider, it may be bent in its middle portion so that the bearings and the locking point will go into their respective positions and then the locking member may be straightened out to hold it in place.

In Fig. 5, the slider is cut out at the rear end to provide a recess 43 for receiving the portion 45 of the combined pull-attaching and locking member 44 which is pivotally connected to the slider by a pin 46. The portion 45 is extended below the pin to provide a camming portion 41 which is normally in engagement with a spring 48 pennanently anchored in the body of the slider. The spring 48 bears against the cam portion 41 and acts to hold the locking member 44 normally in engagement with the fastener elements. The construction and operation of this modification are otherwise generally the same as in Figs. 1 to 4, inclusive.

As a result of my invention, it will be observed that an improved locking slider has been invented which is comparatively cheap to manufacture and possesses the desirable characteristics of strength and simplicity.

While I have in this application specifically shown and described several embodiments which my invention may assume in practice, it will be understood that these embodiments are merely for the purposes of illustration and description and that various other forms may be devised within the scope of my invention as defined in the following claims. I

What I claim as my invention is:

1. A slider for. slide fasteners of the type having rows of interlocking elements, comprising in combination, a slider body. having a' channel through which the interlocking elements pass, a locking member having means to prevent relative movement between said slider body and interlocking elements when said locking member is in locked position, means connecting said locking member and slider body to permit free relative movement of said locking member inwardly to locked position or outwardly to unlocked position, means for limiting outward movement of said locking member, and a pull member connected to the locking member for moving the locking member automatically outwardly to unlocked position, when a force is applied to operate the slider along the elements, said locking member being freely movable solely by the force of gravity to locked position when no force is being applied to said pull member.

2. A slider for slide fasteners 01' the type having rows of interlocking elements comprising in combination a. slider body having a channel through which the interlocking elements pass, a locking member having means adapted to enter through an opening in the slider body into said slider channel for locking the slider when in its inner position, means connecting said locking member to said slider body permitting free inward movement to locked position solely under the influence of gravity, and a pull member connected to said locking member for moving it outwardly to unlocked position when a force is applied to operate the slider along the elements.

3. A slider for slide fasteners of the type having rows of interlocking elements comprising in combination, a slider body having a channel through which the interlocking elements pass, a locking member, means pivotally connecting said locking member to said slider body, a locking prong on said locking member spaced from the pivot, and a pull member connected to the looking member on the same side of the pivot axis as said locking prong for moving the locking member automatically to unlocked position when a force is applied to operate the slider along the elements, said locking member being freely movable solely by the force of gravity to locked position when no force is being applied to said pull member.

4. A slider for slide fasteners of the type having rows of interlocking elements, comprising in combination a slider body having a channel through which the interlocking members pass, said slider body having an opening at one end communicating with said channel, a locking member, means pivotally connecting said locking member to said slider body adjacent the end opposite said opening, said locking member having a prong adapted to extend through said opening and engage the interlocking elements for locking the slider, a pull member connected to said locking member on the same side of the pivot as said prong, said slider 4 body having means adjacent said opening for positively limiting outward swinging movement of said locking member, said locking member being movable to its outer unlocked position automatically by a force applied to said pull member to operate the slider along the elements, said locking member being freely movable solely by the force of gravity to locked position when no force is being applied to said pull member.

GIDEON SUNDBACK.