US2397693A

US2397693A - Automatic lock slider

Info

Publication number: US2397693A
Application number: US574743A
Authority: US
Inventors: Rabinow David
Original assignee: Conmar Products Corp
Current assignee: Conmar Products Corp
Priority date: 1945-01-26
Filing date: 1945-01-26
Publication date: 1946-04-02
Anticipated expiration: 1963-04-02

Description

April 2, 1946u D. RABINQW 2,397,693

AUTOMATIC LOCK SLIDER Filed Jam. 26, 1945 2 Sheets-Sheet l Y DAVID RABINOW BY @AMW/W AGENT April 2, 19416.y D. RABINOW 2,397,693

` AUTOMATIC Loox SLIDER I Filed Jan. 26, y1945 2 Sheets-Sheet 2 INVENTOR.

DAV/D RA'lNowI BY AGENT Patented .Apu 2, 1946A AUTOMATIC Loox sLmEa 'David Rablnow, Maplewood Township, Essex I County, N. J., assignor to Conmar Products Corporation, Newark, N. J., a corporation of New ,Jersey Application January 26, 1945, Serial No. 574,743 Claims. (Cl. .2L-205.5)

This invention relates to a slider for a slide.

fastener and more particularly to an automatic lock slider.

view of an automatic lock slider embodying features of the present invention; i

The common form of automatic lock slider embodies a detent which normally engages the elements of Ithe slide fastener and hence prevents unintended opening of the fastener. In most prior constructions, while the locking detent can be fully brought out of engagement when the slider is moved in opening direction, this is not true when it is moved in closing direction. This results in unsatisfactory running qualities of the slider when moved in closing direction and in excessive Wear of the detent. The prime object of my invention is to provide an automatic lock slider which is as smoothly running in closing direction as in opening direction. A more specilc object is to provide an automatic lock slider the locking detent of which is completely brought out of engagement with the fastener elements in Whichever direction the slider lis moved.

It is true, in a slider of a known type the disadvantage of rough running qualities in closing direction are obviated, yet with this construction the locking detent is exposed when the slider is actuated. As a matter of fact, with this prior construction, the locking detent might be made to stay exposed by extraneous material or for Fig. 2 is a partially sectioned side view, the section being taken through the slider body in the plane of the line 2-2 of Fig. l;

Fig. 3 is an enlarged side view of a slider lug, and shows how the tangs of the lug are closed;

Fig. 4 is a transverse section taken through the pull in the plane of the line 4-4 of Fig, 2;

Fig. 5 is a front elevational view of the slider` body, that is, the slider before the assembly of the pull andlocking member thereto; and

Fig. 6 is a view similar to Fig. 2 but showing the locking mechanism in unlocked condition.

In the particular construction shown in the drawings, the invention isapplied to a one-piece die cast slider. Having first reference to Figs. l and 2, the slider generally designated S comprises parallel walls I0 and I2 provided with inturned flanges i4 and I6 and united at one end by a wedge-shaped post I8 frequently referred to as the diamond. The slider wall l0 is providedwith outwardly projecting recessed lugs .20, 20. Thus far the construction described is a conventional 4form of a slider body. This slider body defines interiorly a Y-shaped channel and cooperates with i a slide fastener received in this channel and not some other reason even when the slider is not tent is always concealed. Thus, the locking detent is protected from injury and at the same time prevented from damaging` any extraneous materials.

Other objects of my present invention are to provide an automatic lock slider which is sturdy in structure and can readily be assembled..

To the accomplishment of the foregoing and such other objects as may hereinafter appear, my invention consists in the elements of an automatic lock slider and their relation one to the other as hereinafter are more particularly described in the specification and sought to ybe defined in the claims. The specification is accompanied by drawings, in which:

Fig. 1 is a partially sectioned front elevational shown in the drawings because it may be of conventional character. By moving the slider S in the direction of the diamond the elements of the two opposing halves of the slide fastener are interlocked, and by moving the slider in the opposite direction the elements are disengaged.

The automatic locking mechanism according to the invention, as exemplied in the construction of the drawings, includes a locking member 22, a pull 24 and a spring 2t.

The locking member is a two-armed lever and is fulcrumed for rocking movement on the slider wall I0. For this purpose the slider wall is provided with an outwardly tapered portion 28, clearly shown in Figs. 2, 5 and 6. The arm 22 o'f the locking member is provided with a detent D which operates in an aperture 2l in the slider wall lll. In the position of the detent shown in Fig. 2; the detent extends into kthe slider channel C to engage the elements of one of the slide fastener halves. The arm 22' is provided with a stop 23 ldesigned to retain the locking member from being withdrawn from the slider. l

The pull 24 comprises amain body 30, a cover 32, and two

trunnions

34, 34, the main body and cover being spacedly joined by an intermediate portion 36, and all the pull-forming'portions being an integral whole that can be beneficially the Slider.

' 'l'he formation oi the pull at its cam end can be best seen in Fig. 4.

The spring 26 consists of a central portion 44,

coil portions

48, 48 and free ends 48, 4l. The central portion 44 which forms a bend or loop is laid along the side edges of the portion 3B and is thereby partly received in a groove El! formed between the main body lll of the pull and the cover 32 (see Fig. 2). The two coil portions, which adjoin the central spring portion 44, lie around the

trunnions

34, 34 and terminate in the

end portions

48, 48.

This slider is assembled in the following steps:

First the spring is assembled to the pull by spreading apart the

coil portions

46, 46 of the spring, passing one of the coil portions over a trunnion'34, putting the central spring portion 44 in place, as is indicated in Fig. l, and passing the other coil portion 4B over the other trunnion 34. w

The next step is to assemble the locking member 22 to the slider. This is done by placing the locking member into the position shown in Fig. 2.

' Finally the connected pull spring is attached to the slider body. Each of the pivot lugs 20, 20 provided with this construction. has a recess 52 which is open in the initial formation of the slider as shown in solid lines in Fig. 3. The

trunnions

34, 34 as well as the

spring end portions

48, 48, the very ends of which are preferably folded back as shown in Fig. 4, are placed in the

recesses

52, 52, whereupon the

tangs

54, 54 of each of the

recessed lugs

20, 20 are closed, vthe closed condition being indicated in Fig. 3 in dash-dotted lines. The closed lugs retain the trunnions and the spring ends against displacement. The spring is so wound and the spring ends are so secured to the slider as to keep the pull ilat against the slider body as shown in Fig. 2. In this ilat or normal position of the pull the spring is under torsion so as to normally urge the pull andthe locking detent-carrying vann 22' of the locking member 22 toward the front of the slider and at the same time the detent D into engagement with the slide fastener elements.

When so assembled-the central spring portion 44 which engages the pull movestogether with the pull with or against the torsion of the spring, whereas the spring ends are xedly supported on As mentioned hereinbefore, Fig. 2 illustrates the locking condition of the slider. In this condition, the pull with its surface 56 bears against the arm 22' of the locking member 22 and with its surface 58 against the other arm 22". In Fig. 6, which illustrates the unlocked condition of the slider, two different raised positions of the pull are shown. The slider is unlocked 'in the usual way by manual operation of the pull. The

solid line position indicates the condition preparatory to or during the movement of the slider in opening direction. The dot and dash line position illustrates the movement in closing direction.

From inspection of Fig. 6 it can be seen that in whatever raised position the pull might be, the cam portion 42 engages the arm 22"I and presses this arm farther into the depression 80 provided in the slider wall I0. The arm 22 has swung outwardly and the detent I) has moved out of engagement with the fastener elements. The

torsion of the spring is increased by raising the pull with the result that the pull, when released, is forced all the more back into the fiat position shown in Fig. 2. The locking member is thus, under the action ofthe spring, automatically caused to rock back into the position of Fig. 2, with the detent ready to engage or engaging the slide fastener elements. With the present construction, it will appear that the over-all height of the slider is decreased by providing the depression 60 which receives the lever arm 22".

The details on the slider wall l0 are best shown in Fig. 5 wherein it will be seen that the depression 60, the fulcrum 28, the aperture 2| and a raised portion 62 are substantiallyin alignment with each other and arranged longitudinally oi the slider. The slider wall I0 is raised at 62 to provide a cavity 64 in its inner surface to allow the stop 23 to move over a larger arc of movement and thus make it possible for the detent D to move from the locking position of Fig. 2 to the completely unlocked position of Fig. 6.

From Fig. 6, two distinctive features of the invention will be clear. One feature is that the locking detent D even when disengaged remains concealed. Consequently, damage of the detent 1 itself as well as damage caused by the detent to spring 26, after the pull and spring have been united in the above referred to way, are xed at the trunnions 34, 3B in a single operation, while the locking member 22 is merely placed into its position.

, detenta It will be understood that although I have shown the locking member with one detent only, this is not essential. The locking memberl may just as well be provided with a pair of staggered It is believed that the construction and operation, as well as the many advantages of vmy improved automatic lock slider, will be apparent from the foregoing detailed description thereof. It will also Vbe apparent that while I have shown and described my invention in a preferred form.'

many changes and modifications may be made in thestructure disclosed, without departing from the spirit of the invention as sought to be defined in the following claims:

I claim:

l; In an automatic lock slider for a slide fastener, a lever fulcrumed on the slider, a locking detent on the lever, a pull pivoted on the slider, and a spring acting immediately on the pull and .urging same'toward the sliderand the locking deten't into engagement with the elements of the y Slide fastener. 2.. In an automatic lock slider for a slide fastener, a lever fulcrumed on the slider, a locking Adetent at one end of the lever, a pull pivoted on the slider, a cam at the pivot end of the pull, and a spring acting immediately on the pull and urging the pull and locking detent-carrying end ofthe lever toward the slider and the Ilocking detent into engagement with the elements of the slide fastener, said cam engaging the other endof the lever and causing the locking detent to move out of engagement with said elements when the pull is raised.

3. In a slider as dened in claim 2, said spring being a coil spring substantially arranged around the pull pivot.

4. In an automatic lock slider for a slide fastener, a channeled body formed by a pair of spacedly united walls and adapted to receive interiorly the slide fastener, one of said Walls having an outwardly tapered portion, a rigid member disposed longitudinally of the slider and loosely fulcrumed on said tapered portion for rocking movement, with the tapered portion located intermediate the ends of said member, a locking detent at one end of the member, a pull having a cam portion at one end and being pivoted adjacent said cam portion on said slider wall, and a coil spring arranged substantially around the pull pivot and torsionally acting on the pull in order to urge the pull and locking detentcarrying end of the member toward the slider and lthe locking detent into engagement with the elements of thev slide fastener, said cam portion engaging the other end of said member and causing the locking detent to move out of engagement with said elements when the pull is raised, whereby the raising of the pull will increase the torsion upon the spring.

5. In an automatic -lock slider for a slide fastener, a channeled body formed by a pair of spacedly united walls and adapted toreceive interiorly the slide fastener, one of said Walls having an opening therethrough, an outwardly tarepresenting the place oi application of a force torock the lever, a pull having a cam portion at one end and outwardly extending trunnions at thecam portion end, the trunnions being supported by said lugs, a coil spring arranged substantially around the pull pivot and normally torsionally acting on the pull and urging the pull and locking detent-car ing lever arm toward the slider and the locking detent into engagement with the elements of the slide fastener, said cam portion engaging said place of application and causing the locking detent to move out of engagement with said elements when the pull is raised.

6. In a slider as defined in claim 5,"said spring comprising a loop-shaped central portion engaging the pull, two coil portions adjoining said loopshaped portion and being arranged around the trunnions, and free ends engaging the lugs.

7. In a slider as deilned in claim 5, said spring comprising a loop-shaped central portion engag, ing the pull, two coil portions adjoining said loopshaped portion and-being arranged around the trunnions, and free ends engaging the lugs, said pull having a portion covering the spring.

pered portion, and a pair of outwardly projecting 8. In a slider as defined in claim 4, the locking detent-carrying end of the member being prov vided with a stop cooperating with a. cavity in the slider wall, the stop serving to retain the member against withdrawal from the slider, the cavity receiving the stop when the locking detent is out 'of engagement with the slide fastener elements, and permitting the locking detent to completelv move out of engagement.

9. In a slider as defined in claim 4, said slider wall being provided with a. depression to receive the end of the member opposite the locking detent-carrying end.

10. In a slider as defined in claim 2, said spring being shaped and arranged so that it engages the pull at points spaced from the pull pivot.

DAVID RABINOW.