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Publication numberUS2554252 A
Publication typeGrant
Publication dateMay 22, 1951
Filing dateJul 26, 1946
Priority dateJul 26, 1946
Publication numberUS 2554252 A, US 2554252A, US-A-2554252, US2554252 A, US2554252A
InventorsJones Lester L
Original AssigneeConmar Prod Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automatic lock slider for slide fasteners
US 2554252 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

May 22, 1951 1.. L. JONES AUTOMATIC LOCK SLIDER FOR SLIDE FASTENERS 2 Sheets-Sheet 1 Filed July 26, 1946 0 m T10 N V WL m 5 Z L AT TORNEYS y 1951 L. JONES 2,554,252

AUTOMATIC LOCK SLIDER FOR SLIDE FASTENERS Filed July 26, 1946 2 Sheets-Sheet 2 FILES i I I fa l \\\\r INVENTOR. Lasfar L. Jones ATTORNEYS Patented May 22, 1951 AUTOMATIC LOCK SLIDER FOR SLIDE FASTENERS Lester L. Jones, Oradell, N. J assignor to Conmar Products Corporation, Newark, N. J., a corporation of New Jersey Application July 26, 1946, Serial No. 686,502

19 Claims. 1

A more particular object is to provide a better and more positive release of the locking tooth when the slider is moved by means of the pull. With the present invention the lock is fully released when the slider is moved in fastener-closing direction, thereby avoiding ratcheting or movement of the locking tooth over the fastener elements, with consequent noise and wear. The lock is released when the slider is moved in either fastener-closing or fastener-opening direction, and regardless of the angle at which the pull is operated, including even unusual positions such as parallel to, or perpendicular to the stringers.

Still another object of theinvention is to apply the improvements to an automatic locking slider of the general type disclosed in Patent No. 2,360,437, issued October 17, 1944 to William Mikulas and the present inventor, in which deflection of the stringers of the fastener acts as resilient means for tending normally to lock the slider. Such a slider avoids the need for metallic springs, and the complete automatic locking slider is made up of only three rugged components, the slider body, the locking member or latch, and the pull.

In some forms of the invention there disclosed, the pressure part of the latch, that is, the part engaged by the flexed stringers, is spaced far from the locking tooth and the fulcrum. Such a slider functions satisfactorily at any point along the stringers, but diificulty may arise at the ends of the stringers, because of interference with top stops at the upper end, or interference with the pin of a fully separable bottom stop at the lower end. In other forms of the invention disclosed in said patent, there is a ratcheting action of the locking tooth along the fastener elements when the slider is pulled in fastener-closing direction. One object of the present invention is to overcome the foregoing difficulties and to provide a locking slider in which the pressure part is beneath the fulcrum and relatively near the locking tooth, but in which the pull is held by a bail located above the fucrum, so that any force in fastener-closing direction tends to positively release the latch.

Still another object of the invention is to provide an automatic lock slider which is simple, compact, easy to assemble, inexpensive to manufacture, improved in appearance, and in which 2 the fulcrum of the latch is protectively housed within the slider body.

To accomplish the foregoing objects, and others which will hereinafter appear, my invention resides in the automatic lock elements and slide fastener elements, and their relation one to the other, as are hereinafter more particularly described in the following specification. The specification is accompanied by drawings, in which:

Fig. l is a vertical section through a slider embodying features of my invention, said section being taken approximately in the plane of the line Il of Fig. 2;

Fig. 2 is a plan View of the slider;

Fig. 3 is a partially sectioned end view of the same;

Fig. 4 is a longitudinal section similar to Fig. 1, but showing the latch in open or released position;

Fig. 5 is a plan View of the top wing of the slider before the latch and pull are added;

Fig. 6 is a perspective view of the latch, drawn to enlarged scale;

Figs. '7, 8 and 9 show successive steps in the operation of assembling the latch with the top wing only of the slider;

Fig. 10 is a fragmentary section taken longitudinally of the slider, and explanatory of a detail of the assembly;

Fig. 11 is a bottom view of the trunnion of the pressure parts of a modified lock member;

Fig. 12 is a vertical section through a slider,

1 taken approximately in the plane of the line drawing) |2l2 of Fig. 11; and

Fig. 13 is a similar section taken approximately in the plane of the line l3l3 of Fig. 11.

Referring to the drawings, and more particularly to Figs. 1 and 2, the slider comprises three main components, the slider body S, the locking member or latch L, and the handle or so-called pull P (only one end of which is shown in the The slider cooperates with a pair of stringers which may be conventional in comprising beaded tapes with interengageable fastener elements secured thereto. A small section of stringer is shown in Figs. 1 and l, this comprising a tape l2 having a beaded edge It, and fastener elements [6.

The slider body S, as usual, comprises top and bottom wings I8 and 25] secured together at a neck portion or so-called diamond 22. The side edges of the wings are flanged, as indicated at 24, to provide a generally Y-shaped slider channel which receives the stringers and operates to mesh the same when the slider is moved in 3 fastener-closing direction, and to unmesh the same when the slider is moved in fastener-opening direction.

The latch L (see Fig. 6) comprises a detent or looking tooth 26, a fulcrum part 28, a pressure part 30 so related to the fulcrum part 28 that the latch as a whole functions as an angle lever, and a bail part 32 which carries the pull. In the preferred construction shown, the latch has a pair of transverse members 34 projecting on opposite sides. These are like trunnions, except that they are vertically flattened. The upper edges of the trunnions 34 act as the fulcrum parts 23, and the lower edges of the trunnions 34 act as the pressure parts 30. A web 36 of reduced thickness is preferably left beneath the bail 32, but it will be understood that if desired, a passage or slot for the pull may extend clear through the latch beneath the bail part 32. The latch is completed by motion-limiting stops 38 and 40 which help locate the latch in proper position when it is assembled in the slider body.

Reverting to Figs. 1,2 and 3, the pull P may be conventional, it having a handle part 42 (most of which is omitted in the drawing), and spaced arms 44 (Fig. 2) which straddle the latch L and which are provided at their ends with inwardly projecting studs 46 received beneath the bail part 32 on opposite sides of the web 36.

Referring now to Fig. of the drawing, the

the upper edges of the trunnions 34 of the latch.

The bottom wing 20 of the slider body is recessed opposite (beneath) the trunnions 34, to afford deflection of the stringers in cooperation with the pressure parts 30. This will be evident in Figs. 1 through 4, which show the depression or concavity 54 beneath the trunnions 34.

The operation of the slider will be clear from inspection of Fig. 4. If the slider is pulled in fastener-opening direction (to the right in Fig.

4) with the pull in its usual angular position, shown in solid lines at P, the latch is released and the tooth 26 moved to the upward position shown. This is so because of the upward component of force applied by the pull. The motion of the latch is limited by the stop 38, which bears against the top of the slider. If the slider is moved in fastener-closing direction (to the left in Fig. 4) with the pull in its usual position, shown in broken lines at P, the latch is turned counterclockwise about the fulcrum 28, thus lifting the tooth 26 clear of the stringers, the motion again being limited by the stop 38. This result follows from the fact that the bail 32 holds the pull P at a point higher than the fulcrum 28. Thus the slider is moved in either direction without the noise and friction which arise when the locking tooth is permitted to ratchet or chatter along the fastener elements.

The latch will be released even if the slider is moved in an abnormal or unusual manner. For example, if the slider is moved in fastener-closing direction with the pull parallel to the stringers, that is, horizontal as viewed in Fig. 4, the latch will be turned counterclockwise exactly as shown. If the slider is moved in fastener-opening direction, with the pull parallel to the stringers, that is, horizontal as viewed in Fig. 4, there is no outward component of force to release the latch, but the sloping shape of the bail 32 causes the pull to cam the latch in counterclockwise direction. It is partially for this reason, and partially to take advantage of any outward component of force with the usual angular position of the pull, that the bail is sloped as shown. This slope in the present example approximately parallels a line extending from the fulcrum 28 to the locking tooth 26. r

If the slider is moved while holding the pull perpendicularly to the slider (i. e., in vertical position as viewed in the drawing), the pull will move toward either end of the bail, and thereupon will function to release the latch exactly as previously described.

The automatic locking action is based broadly on the principles already set forth in the Patent No. 2,360,437 previously referred to. In Figs. 1 and 4, it will be seen that the stringers of the fastener are bent or flexed downwardly somewhat between the lower edges or pressure parts of the trunnions 34 and the recess or concavity 54. This causes a frictional engagement with the pressure parts, and on any attempted opening of the fastener (which corresponds to a leftward movement fo the stringers through the slider), the latch acts as an angle lever which is turned in a clockwise direction about the fulcrum 28, thereby moving the tooth 26 into locking position if it was not already there, or holding it there if it was. The 'stop 4!) limits the locking movement.

The method of assembly of the parts of the slider will be clear from inspection of Figs. '7, 8 and 9. The latch L is inserted upwardly through the slot 59 in the upper wing [8 of the slider before the upper and lower wings are joined. The latch is turned through the successive positions shown in Figs. 7 and S, and is then slid to the right to locate the stop 40 over the slider wing. In Fig. 9 this movement to the right has been started. The left walls of the open bearings 52 are then pressed toward the right, as shown at 53 in Fig. 10. This holds the latch to the right, with the stop 40 (Fig. 9) over the slider body. It also provides a narrowed and therefore a substantially fixed fulcrum seat for the top edge of the trunnion. The bottom wing. is then added, following Which the pull is applied to the bail by squeezing the arms 44 (Fig. 2) from an initial outwardly spread relation (not shown) to the parallel relation shown.

In the particular slider here shown, the top and bottom wings are joined together by welding at the neck 22. This is a convenient method when the wings are coined out of sheet stock. However, it will be understood that other ways of forming the slider body may be employed, as, for example, riveting; and that the wings may be made in other ways, as for example, by die-casting. The latch L may be coined or die-cast. The pull P is preferably stamped out of heavy-gauge sheet stock, but this too may, if desired, be diccast.

If desired, the pressure'parts of the latch may be modified slightly in configuration. Such a modification is illustrated in Figs. 11, 12 and 13 of the drawing. Referring to Figs. 11 and 12, the. pressure part I'D on one side of the longitudinal axis of the slider has its lowermost surface at T2, and referring to Figs. 11 and 13, the

pressure part 14 on the other side of the longitudinal axis has its lowermost surface at '16.

Thus the lowermost surfaces 12 and 16 on the two sides of the longitudinal axis are offset or staggered relative to one another in the direction of the longitudinal axis. A very simple way to produce this effect is to slope the part iii in one fastener elements attempt to move from right to left, as viewed in the drawing) an element or scoop 80 on one stringer bears against the part "l2 and tends to move the latch to locking position, whereupon the next element or scoop 32 on the other stringer bears against the lowermost part '16 and assures completion of the locking operation.

It is believed that the construction and operation, as well as the advantages of my improved automatic locking slider, will be apparent from the foregoing detailed description thereof. The latch is positively released when the slider is moved by means of the pull, and regardless of the angle at which the pull is held while moving the slider. There is no sliding or ratcheting of the tooth along the fastener elements. The slider has only three main components, and does not require the use of tiny, delicate springs. (However, some features such as the enclosed housing of the trunnions within the slider body, may be used connection with resilient means other than the flexed stringers here illustrated.) The latch functions as an angle lever with the pressure part beneath the fulcrum, instead of widely spaced therefrom, hence there is no interference with top stops, even disappearing top steps. Moreover, there is little movement into the slider channel (compared to the operation when the pressure part is spaced a substantial distance along the slider from the fulcrum), hence there is no interference with the pin of a fully separable fastener. The latch member is compact and sturdy. The parts are readily assembled.

It will be apparent that while I have shown and described my invention in a preferred form, changes may be made in the structure disclosed, without departing from the spirit of the invention as sought to be defined in the following claims.

I claim:

1. A locking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings, said latch comprising trunnions acting as a fulcrum, a locking tooth displaced longitudinally of the slider from the trunnions, and a bail part for carrying the pull and located above the trunnions and the locking tooth, said top wing having a slot for receiving a part of the latch and having a pair of open bearings formed upwardly on opposite sides of the slot against which the aforesaid trunnions are upwardly seated to provide a fulcrum for the latch.

2. A locking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings joined by a neck to form a Y-shaped channel for receiving the stringers of the slide fastener, said latch comprising trunnions acting as a fulcrum, a locking tooth displaced longitudinally of the slider from the trunnions, and a bail part for carrying the pull and located above the trunnions and the locking tooth, said top wing having a slot extending longitudinally thereof for receiving the bail part of the latch and having a pair of approximately semi-cylindrical bearings formed upwardly on opposite sides of the slot against which the aforesaid trunnions are upwardly seated to provide a fulcrum for the latch.

3. A locking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings, said latch comprising trunnions acting as a fulcrum, a locking tooth displaced longitudinally of the slider from the trunnions, a bail part for carrying the pull and located above the trunnions and the locking tooth, and motion limiting stops at its ends, said top wing having a slot extending longitudinally thereof for receiving the bail part of the latch with the aforesaid stops extending beyond the ends of the slot above the wing, and having a pair of open bearings formed upwardly on opposite sides of the slot against which the aforesaid trunnions are upwardly seated.

4. An automatic locking slider as defined in claim 1, in which the bail part slopes in a direction generally parallel to a line extending between the fulcrum part and the locking tooth.

5. An automatic locking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings, said latch comprising a fulcrum part, a pressure part to be engaged by the stringers of the slide fastener and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, and a bail part for carrying the pull and located higher than the fulcrum part and the locking tooth, said latch having a pair of projections extending transversely thereof, the top edges of said projections acting as the fulcrum parts of the latch and the bottom edges of said projections acting as the pressure parts of the latch, said top wing having a slot for receiving a part of the latch and having a pair of open bearings formed upwardly on opposite sides of the slot against which the aforesaid fulcrum parts are upwardly seated.

6. An automatic locking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings, said latch comprising a fulcrum part, a pressure part to be engaged by the stringers of the slide fastener and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, and a bail part for carrying the pull and located higher than the fulcrum part and the locking tooth, said bottom wing being recessed opposite the pressure part or the latch for deflection of the stringer, said latch having a pair of projections extending transversely thereof, the top edges of said projections acting as the fulcrum parts of the latch and the bottom edges of said projections acting as the pressure parts of the latch, said top Wing having a slot for receiving a part of the latch and having a pair of open bearings formed upwardly on op- Y posite sides of the slot against which the aforesaid fulcrum parts are upwardly seated.

'7. An automatic locking slider for a slide fastener, said slider comprising a slider body, a

7 the slide fastener, said latch comprising a fulcrum part, a pressure part to be engaged by the stringers and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, and a bail part for carrying the pull and located above the fulcrum part and the locking tooth, whereby a force applied by the pull in fastener-closing direction releases the latch and avOidS ratcheting of the tooth on the stringer elements, said bottom wing being recessed opposite the pressure part of the latch for deflection of the stringer, said latch having a pair of trunnion-like projections extending transversely thereof, the top edges of said projections acting as the fulcrum parts of the latch and the bottom edges of said proj ections acting as the pressure parts of the latch, said top wing having a slot extending longitudinally thereof for receiving the bail part of the latchand having a pair of approximately semicylindrical bearings formed upwardly on opposite sides of the slot against which the aforesaid trunnions are upwardly seated.

8. An automatic locking slider for a slide .fastener, said slider comprising a slider body, alatch, and a pull, the slider body including top and bottom wings, said latch comprising a fulcrum part, a pressure part to be engaged by the strin ers and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, a bail part for carrying the pull. and located above the fulcrum part and the locking tooth, wherebyaforce applied by the pull in fastener-closing direction releases the latch .and avoids ratcheting ofthe tooth on the stringer elements, and motion limit.- ing stops at its ends, said bottom wing being recessed opposite the pressure part, of the latch for deflection of the stringer,.said latch having a pair of projections extending transversely thereof, the top edges of said projections acting asthe fulcrum parts of the latch and the bottom edges of said projections acting as the pressure parts of the latch, said top wing having a slot extending longitudinally thereof for receiving the loailpart of the latch .with .the aforesaid stopsextending .beyond the ends of the slot above the, wing and having a pairof open bearings formed upwardly onopposite sides of the slot. against which the .aforesaid fulcrum parts are upwardly seated.

9.v An automatic locking slider as defined .in

claim 5, in which thebail part slopes in a direction generally parallel to a line extendingbe- .tween the fulcrum part and the locking tooth.

10. An automatic locking slider as defined in claim 5, in which the pressure part of the latch on one side of the longitudinal axis of the sliderhas its lowermost surface offset or staggered lengthwise of the slider relative to the lowermost surface of the pressure part on the other side of the longitudinal axis of the latch.

11. An automatic locking slider as defined in claim 6, in which the pressure part of the latch on one side of the longitudinal axis of the slider slopes in one direction, and the pressure part, on the other side of thelongitudinal axis slopes in the other direction, whereby the lowermostsurfaces of the pressure parts on the two sides of the longitudinal axis arestaggered or offset relative to one another in the direction of they longitudinal axis.

12. Au automatic locking slider for a slidefastener, said slider comprising, a. slider body, a latch,

,and a pull, the. sliderv body includin topiand. bottom wings, said latch comprising a fulcrum part located above the main upper surface of the top wing, a pressure part to be engaged by the stringers of the slide fastener and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaidparts, and a bail part for carrying the pull and locatedhigher than the fulcrum part and'the locking tooth, said ball part being so shaped as to act as a cam sloping downwardly in the same general direction as a line extending between the fulcrum and the tooth, said cam operating to release the latch if the slider is moved in fasteneropening direction by pulling the pull parallel to the stringers.

13. An automatic looking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings joined by a neck to form a Y-shaped channel for receiving the stringers of the slide fastener, said latch comprising a fulcrum part located above the main upper surface of the top wing, a pressure part to be engaged by the stringers and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, and a bail part for carrying the pull and located above the fulcrum part and the locking tooth, whereby a force applied by the pull in fastener-closing direction releases the latch and avoids ratcheting cf the tooth on the stringer elements, said bottom wing being recessed opposite the pressure part'of the latch for deflection of the stringers, said bail part being so shaped as to act as a cam sloping downwardly in the same general direction as a line extending between the fulcrum and the tooth, said cam operating to release the latch if the slider is moved in fastener-opening direction by pulling the pull parallel to the stringers.

1%. An automatic locking slider as defined in claim 1, in which the bail part is so shaped as to act as a cam sloping downwardly in the same general direction as a line' extending between the fulcrum and the tooth, said cam operating to release the latch if the slider is moved in fastener-opening direction by pulling the pull parallel to the stringers.

15. An automatic locking slider as defined in claim 3, in which the bail part is so shaped as to act as a cam sloping downwardly in' the same general direction as line extending between the fulcrum and the tooth, said cam operating to release the latch if the slider is moved in fasteneropening direction by pulling the pull parallel to the stringers.

l6. An'automatic. locking slider as defined in clairnr5, in, which the bail part is so shaped as to act, as a camsloping downwardly in the same generaldirection as a line extending between the fulcrum and the tooth, said cam operating to lease thelatch if the slider is moved in fastener- 1 opening direction by pulling the pull parallel to fastener, lsaid slider comprising a sliderbodya the stringers.

18. A n automatic locking slider for a slide latchpandga pulLfthe sliderbody iin'cluding top nd; bottom sai la h minorities a i crum part located above the main upper surface of the top wing, a pressure part to be engaged by the stringers of the slide fastener and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, and a bail part for carrying the pull and located higher than the fulcrum part and the locking tooth, the pressure part of the latch on one side of the longitudinal axis of the slider having its lowermost surfac offset or staggered lengthwise of the slider relative to the lowermost surface of the pressure part on the other sid of the longitudinal axis of the latch.

19. An automatic locking slider for a slide fastener, said slider comprising a slider body, a latch, and a pull, the slider body including top and bottom wings joined by a neck to form a Y- shaped channel for receiving the stringers of the slide fastener, said latch comprising a fulcrum part located above the main upper surface of the top wing, a pressure part to be engaged by the stringers and located generally beneath the fulcrum part, a locking tooth displaced longitudinally of the slider from the aforesaid parts, and a bail part for carrying the pull and located above the fulcrum part and the locking tooth,

whereby a force applied by the pull in fastenerclosing direction releases the latch and avoids ratcheting of the tooth on the stringer elements, said bottom wing being recessed opposite the pressure part of the latch for deflection of the stringers, the pressure part of the latch on one side of the longitudinal axis of the slider sloping in one direction, and the pressure part on the other side of the longitudinal axis sloping in the other direction, whereby the lowermost surfaces of the pressure parts on the two sides of the longitudinal axis are staggered or offset relative to one another in the direction of the longitudinal axis.

LESTER L. JONES.

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

UNITED STATES PATENTS Number Name Date 2,053,463 Conlin Sept. 8, 1936 2,360,43 Mikulas et a1 Oct. 17, 1944

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2053463 *Feb 11, 1935Sep 8, 1936Prentice G E Mfg CoSlider for fasteners
US2360437 *Apr 2, 1943Oct 17, 1944Conmar Prod CorpAutomatic lock slider for slide fasteners
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2913795 *Sep 19, 1955Nov 24, 1959Talon IncAutomatic lock slider for slide fasteners
US2978772 *Jun 9, 1958Apr 11, 1961Talon IncAutomatic lock slider for slide fasteners
US4512441 *Jun 28, 1982Apr 23, 1985General Screw Products CompanyBlowdown fitting
US5901420 *Oct 29, 1997May 11, 1999Ykk CorporationAuto-lock slide fastener slider
US7870650 *Mar 11, 2008Jan 18, 2011Ykk CorporationSlide fastener slider
Classifications
U.S. Classification24/420
International ClassificationA44B19/30, A44B19/24
Cooperative ClassificationA44B19/306
European ClassificationA44B19/30F