US2215745A

US2215745A - Slider for slide fasteners

Info

Publication number: US2215745A
Application number: US285363A
Authority: US
Inventors: Sundback Gideon
Original assignee: Talon Inc
Current assignee: Talon Inc
Priority date: 1939-07-19
Filing date: 1939-07-19
Publication date: 1940-09-24
Anticipated expiration: 1957-09-24

Description

Sept. 24,; 1940. v GVSUNDEACK 2,215,745

SLIDER FOR SLiDE FASTENERS Filed July 19, 1 939 I EFEEEIEEEIEE;

an ya a A INVENTOR. 59 19 @f'ideon Sundlzack 5, BY @Ja.

TTORNEY.

Patented Sept. 24, 1940 UNITED STATES PATENT OFFICE SLIDER FOR SLIDE FASTENERS Pennsylvania Application July 19, 1939, Serial N0. 285,363

10 Claims.

This invention relates to slide fasteners and, in particular, to the provision of sliders therefor.

It is an object of this invention to provide an improved slider for slide fasteners which is of the automatic or self-locking type and which is positive in operation, strong, durable, compact, and economical to manufacture because of its simplicity of construction and the ease with which the parts thereof may be assembled.

It is a further object of this invention to providesuch a slider construction wherein the biasingv means, adapted normally to urge the locking means thereof into engagement with slide fastener elements, comprises an elongated spring member of the leaf, or substantially flat, type.

It is a further object of this invention to provide such a construction wherein the biasing spring means is of substantial length and where in, in addition to its function in normally resiliently biasing the locking means to locking position, it also provides yielding connection between the locking lug of the slider and the body thereof.

It is a further object of this invention to provide such a construction wherein the biasing spring means, in addition to performing the above enumerated functions, also operates as yielding stop means for limiting movement of the locking lug of the slider inwardly with respect to the body. I

It is a further object of this invention to provide such a construction wherein the biasing spring means operates as yielding stop means for limiting movement of the locking ,lug both inwardly and outwardly with respect to the slider body.

It is a further object of this inventiton to provide a slider construction of the utmost simplicity and wherein the biasing spring means projects from the lower end of the slider upwardly throughout a substantial proportionof thelength Fig. 3 is a view similar to. Fig. 2 but showing.

the slider parts in unlocking position;

Fig. 4 is a transverse section taken substantially on the line 4-4 of Fig. 2

Fig. 5 is a longitudinal section in perspective of the slider construction illustrated in Figs. 1 to 4 inclusive, certain parts thereof being shown in section in the interest of clearness of disclosure;

Fig.6 is an enlarged longitudinal section, similar to Fig. 2, of a modified'slider construction according to the principles of this invention; and

Fig. 7 is a view similar to Fig. 5 of the modifled form of slider construction illustrated in Fig. 6.

Referring to the drawing in detail, and with reference particularly to Fig. 1 wherein, for the purposes of illustration only, I have shown the application of my improved slider to an otherwise conventional slide fastener of the non-separating type, the slide fastener stringers are generally designated l0 and are secured together at their lower ends by suitable bottom stop means, generally designated II.. The stringers Ill each comprise a tape or strip l2 of suitable material to which are secured, in suitable relationship, the fastener members I4 which are adapted for interengagement in known manner to secure the adjacent edges of the stringers Ill together.

The engagement and disengagement of the fastener membe s H' is accomplished by longidisposed between their upper ends and integral therewith. The wedge or web 2| is providedwith inclined exterior surfaces disposed between the back and front wings which deflne a downwardly directed V and which cooperate with the marginal side flanges 23 on the back wing l9 and the marginal side flanges 24 on the front wing 20 to form an upwardly diverging substantially Y-shaped, channel 25, in which the fastener elements M of the stringers III are guided in known manner, as shown in Figs. 2, 3. and 4.

While the back wing 19 is of solid construction, as shown, the front wing 20 is provided with a centrally disposed longitudinal slot 21 extending from the outer surface thereof into the channel 25. The side walls of this slot are designated 28 and are flat, and at each side of the slot 21 is a longitudinal recess 29 (Fig. 1), which is adapted slidably to receive one furcation |6a of the pull I6, as indicated in the drawing. Disposed between these recesses 29 at the lower end of the wing 20 is a lug 30 which cooperates with the recesses 29 to guide the furcations |6a of the pull 6. The upper end wall of the slot 21 is doubly inclined to form the transverse projection 3| of substantially triangular section, which projection cooperates with notch means on the locking lug to form a hinge connection, as hereinafter most clearly described.

The lower end wall 32 of the slot 21 is flat and slightly inclined, as shown in Figs. 2 and 3. Disposed in the slot 21 is the locking lug 33 which is provided with a transverse slot 34 adapted slidably to receive the pivot projections extending inwardly toward one another from the furcations |6a of the pull l6.

The upper end wall of the locking lug 33 is provided with a notch 35 adapted to cooperate with the above described projection 3| to form a hinge connection between the locking lug 33 and the slider body, as shown in Figs. 2 and 3. The lower end wall of the locking lug 33 is inclined and is substantially parallel with the lower between the length of the slot 21 and the length of the locking lug 33 is such that the locking projection or pin 36 cooperates with the lower end wall 32 of the slot 21 to limit pivotal movement outwardly of the locking lug 33 with respect to the slider body, as shown in Fig. 3. I

Extending from the lower end of the inner wall of the locking lug 33 is a recess or channel 31 which extends to a point beyond the middle of the locking lug 33 and which terminates in a transverse notch 38 which is-slightly inclined upwardly. Received by this channel 31 with its upper end disposed in the notch 38 is a substantially L-shaged leaf spring member 39 which has the short leg 40 thereof disposed at substantially ninety degrees to the long leg thereof and secured in notches 4| provided in the above described lug 30.

The spring 39, hereinafter termed the biasing spring, normally urges the locking lug 33 inwardly of the slider body to the locking position-illustrated in Fig. 2. The slider may be unlocked from the stringers H! by manual engagement of the pull tab 8 of thepull I6 to pull the locking lug 33 outwardly against the force of the biasing spring 39 to the position shown inFig. 3. In that position, the locking pin or projection 36 is disposed outside the (channel 25, and the stringers and their fastener memupon the slider |5 will be locked with respect wto the stringers l6. While only one looking pip the notches 4| are formed subsequent to the formation of a substantially rectangular slot in the wing 20, whereafter the lower or short leg 40 of the biasing spring 39 is positioned in the slot, and the corners of the slot are upset or beaded over upon the leg 40 to secure it rigidly with respect to the wing 26.

If the slider body is formed of plastic material, then the notches 4| are formed subsequent to the formation of arectangular slot in the wing 20 by the application of suitable solvent to the corner portions of the slot, which is followed by application of pressure rigidly-to secure the leg portion 40 of the spring 39 with respect to the lug 30.

In order to assemble the slider'illustrated in Figs. 1 to 5, the locking lug 33 is inserted through the lower end of the channel 25 and then pushed outwardly substantially to the position shown in Fig. 2. The pivot projections ll of the pull l6 are snapped into the pull supporting slot 34- in the locking lug 33. The upper end of the long leg of the biasing spring 39 is inserted in the notch 38 in the locking lug 33, and the'short leg portion 40 of the biasing spring 39 is secured to the lug 30 of the slider body by the formation of the notches 4| by the above described procedure. The slider is then assembled and ready for use in slide fasteners of various knowntypes and constructions.

In the modification illustrated in Figs. 6 and 7, the details of the pull 16 are unchanged. The slider body, designated |5a is, however, somewhat modified. The back wing Illa of the slider body I50, and also the wedge or'wedge-forming web 2|a are similar to corresponding parts of the slider body l5, illustrated in Figs. 1 to 5. The front wing 26a, however, is somewhat modified. This front wing 26a is provided with marginal side flanges 24a, corresponding with marginal side flanges 24 of the above described front wing 20. These marginal side flanges 24a cooperate with marginal flanges 23a of the back wing I911, corresponding with the above described marginal side flanges 23, and with the wedge or wedgeforming web 2|a to form between the'wings I91; and' 20 a channel 25a, corresponding with the above described channel 25.

end wall 32a, and upper e d wall forming a projection 3|a, all corresponding with analogous parts of the construction of Figs. 1 to 5. Atv

each side of the slot 21a are recesses 29a, corresponding to recesses 29 01 the construction ofFigs. lto 5. I

The lug 30a, which corresponds to the lug 30, is somewhat modified, being provided with a longitudinal bore 4|a instead of the notches 4|.

The bore 4 la is substantially cylindrical but provided at opposite sideswith'grooves adapted to receive keys or feathers provided on the lower or outer, thickened, substantially cylindrical end 4011 of the modified biasing spring 39a. The innor end portion of the biasing spring 39a which extends beyond the lug a is flattened, as shown in Figs. 6 and '7. This biasing spring 39a is substantially flat or straight, and like the biasing spring 39, is of substantial extent, extending substantially to the upper end of the modified locking lug 33a.

The modified locking lug 33a, corresponding to the locking lug 33 of the construction of Figs. 1 to 5, is provided at its upper end with a notch 35a, corresponding to the above described notch 35 and cooperating with the projection 3 la formed by the upper end wall of the sclot 21a to provide a hinged or pivotal connection between the locking lug 33a -an'd the slider body. At its lower end, the locking lug 33a is provided with a locking projection of pin 36a, corresponding to the locking pin 36. The lower end portion of the locking lug 33a differs from the corresponding portion of the above described locking lug 33 only in the omission of the channel 31 and notch 38 and in the provision of an aperture 43a through which the biasing spring 33a is adapted to project, as shown in Figs. 5 and 6. Thisaperture 43a communicates with a channel a, which is in the lid form of a recess extending downwardly from the lower inner surface of the pull supporting slot 34a, which corresponds to the slot 34 in the above described locking ing 33. This channel or recess 44a is curved, as shown in Fig. 6. This curvature and the length of the aperture 43a makes the functioning of the biasing spring 39a, in cooperation with the aperture 431:, as a resilient stop means for limiting the pivotal movement of the locking lug 33a with respect to the body of the slider, both inwardly (Fig. 6) and outwardly (Fig. 7) to locking and unlocking positions respectively.

The slider assembly illustrated in Figs. 6 and '7 I may be assembled with extreme ease and convenience. In order to assemble the pull, locking lug, and biasing spring to the slider body, it is merely necessary to insert the locking lug through the lower end of the channel 25a in the slider body to position below the slot 21a, thrust the locking lug 33a outwardly to the position of Fig. 6, snap the pivot projections I I of the pull l5 into the slot 34a, and then insert the biasing spring 39a endwise through the bore Ila in the lug 30a to the position of Fig. 6. If the parts are formed of plastic, the frictional attachment of the spring 39a may be accompanied bya bonding achieved by the application of solvent either to the interior of the bore 4la before insertion of the spring end portion a or by application of solvent directly to the end portion 40a of the spring before its insertion inthe bore.

If the slider body be formed of metal, then the frictional attachment may be emphasized by upsetting the metal adjacent the outer end of the bore Ma.

From the above description, it will be seen that the constructions herein illustrated and described embody various advantages over known prior art structures, which include the use of a long biasing spring, compactness, and extreme ease and convenience of assemblage, which latter feature materially decreases the cost of manufacture.

It is, of course, to be understood that the above described structure is merely illustrative and in no wise limiting and that I desire to comprehend within my invention all modifications included within the scope of the appended claims.

having a fastener member receiving channel therein and having a longitudinal locking lug receiving slot in one side thereof communicating with said channel, a locking lug in said slot having pivotal connection with said body at one end of said slot, said locking lug having thereon looking pin means engageable with fastener members in said channel in the locking position of said locking lug, and a flat leaf spring disposed substantially longitudinally of said body and having one end thereof rigidly secured to said body adjacent the opposite end of said slot, said leaf spring having the other end thereof engaging said locking lug for normally resiliently urging said locking lug to locking position.

2. In a slider as defined in claim 1, said locking lug having herein a longitudinal slot, and a bifurcated pull member having pivotal projections slidably and pivotally supported in said longitudinal slot, said pull member being manually engageable for withdrawing said locking lug from locking position, against the yielding force of said leaf spring.

3. In a slider as defined in claim 1, said locking lug having therein a longitudinal slot, and a bufurcated pull member having pivotal projections slidabiy and pivotally supported in said longitudinal slot, said pull member being manually engageable for withdrawing said locking lug from looking position, against the yielding force of said leaf spring, and said slider body having re-' cesses at opposite sides of said locking lug receiving slot for recessing said pull member in said slider body in the fiat position of said pull member and cooperating with said pull member positively to limit inward movement of said locking lug to locking position.

4. In a slider for slide fasteners, a slider body having a fastener member receiving channel therein and having a longitudinal locking lug receiving slot in one side thereof communicating with said channel, said locking lug receiving slot having the upper end thereof doubly inclined to form a projection, a locking lug in said slot having the upperend thereof provided with a notch complementary with the projection in the end of said locking lug receiving slot, said locking lug havingv locking pin means at the lower end thereof engageable with fastener members in said channel in the locking position of said locking lug, and a flat leaf spring having the lcwer end thereof secured rigidly to said body adjacent, the lower end of said locking lug receiving slot and having the upper end thereof engaging said locking lug for normally yield- 1. In a slider for slide fasteners, a slider body ingly urging said locking lug to locking position and forming yieldable stop means for delimiting the locking position of said locking lug.

5. In a slider for slide fasteners, a slider body having a fastener member receiving channel therein and having a longitudinal locking lug receiving slot in one side thereof communicating with said channel, saidlocking lug receiving slot having the upper end thereof engaging said locking lug for normally yieldingly urging said looking lug to locking position and forming yieldable stop means for delimiting the locking position of said locking lug, said leaf spring cooperating with said locking lug yieldably to limit outward movement of said locking lug to define the unlocked position thereof.

6. In aslider for slide fasteners decribed, a slider body having a slide fastener member receiving channel therein, and a longitudinal locking lug receiving slot extending from one side of said body to said channel, a locking lug in such slot having hinged connection with said body at one end of said slot, said locking lug having therein a notch open toward the 'opposite end of said slot, and a leaf spring memher rigidly secured to said body at one end and having the opposite end thereof disposed in said notch.

'7. In a slider for slide fasteners of the class described, a slider body having a slide fastener member receiving channel therein and a longitudinal locking lug receiving slot extending from one side of said body to said channel, a locking lug in said slot having hinged connection with said body at the upper end of said slot, said locking lug having therein a longitudinal pull receiving slot with an aperture atthe lower end thereof, and a leaf spring member having one end rigidly secured to said body adjacent the lower end of said locking lug receiving slot, said leaf spring member projecting through theaperture in said locking lug and having the upper end thereof in engagement with a wall of said pull member receiving slot.

8. In a slider for slide fasteners of the class described, a slider body having a slide fastener member receiving channel therein and a longitudinal locking lug receiving slot extending from one side of said body to said channel, a locking lug in said slot having hinged connection with said body at the upper end of said slot, said locking lug having therein a longitudinal pull receiving slot with an aperture at the lower end of the class thereof, and aleaf spring member having one end rigidly secured to said body adjacent the lower end of said locking lug receiving slot, said gitudinal locking lug receiving slot in one side thereof communicating with said channel, said locking lug receiving slot having a projection formed in one end thereof, a locking lug in said slot having a notch at one end engageable with said projection for providing interlocking pivotal connection between said'lockinglug andsaid body, and leaf spring means rigidly secured to said slider body at the opposite end of said looking lug receiving slot and cooperating with said locking lug to maintain said notch in engage-,

ment with said projection while normally yield ingly urging said locking lug to locking position and limiting movement thereof toward locking position. I

10. In a slider for slidev fasteners of the class described, a slider body having a slide fastener member receiving channel therein and a locking lug receiving slot disposed longitudinally with respect to said slider body and extending from one side of said body into said channel, a locking lug of substantially the same length as said slot supported movably in said slot for engagement with said fastener members in said channel and for disengagement therefrom, and- -a spring member having one end fixed to said body and having the free end thereof engaging said locking lug for normallybiasing said lug toward engagement with slide fastener members in said slide fastener member receiving channel.

GIDEON SUNDBACK.