USRE22626E - One-way snap fastener - Google Patents
One-way snap fastener Download PDFInfo
- Publication number
- USRE22626E USRE22626E US RE22626 E USRE22626 E US RE22626E
- Authority
- US
- United States
- Prior art keywords
- stud
- socket
- pull
- head
- ring
- Prior art date
Links
- 239000000789 fastener Substances 0.000 title description 14
- 210000003128 Head Anatomy 0.000 description 36
- 210000000088 Lip Anatomy 0.000 description 18
- 230000000694 effects Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 230000002093 peripheral Effects 0.000 description 4
- 241001190717 Hea Species 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
Images
Definitions
- This invention relatesto snap fasteners
- ⁇ Ihe object of the invention is to.provide a snap fastener 'stud member which may be disengaged from a socket of the foregoing character more easily than can a stud of conventional design; and, more specifically, to provide a stud having its head deformedfrom the truly circular shape of a conventional stud in such a way as to facilitate its separation from the one-way detachable socket of the invention in response to a pull applied to the fastened mem-, bers at the one proper place.
- FIG. 1 is a plan view of a socket member constructed in accordance with the invention and secured to a supporting sheet;
- Figs. 2 and 3 are sectional views of the socket of Fig. 1 illustratingits detachment from a conventional stud member in response to a separating pull applied at the one proper place;
- Fig. 4 is a sectional view, similar to that of Figs. 2 and 3, illustrating the manner in which in which the socket locks with its cooperating stud to prevent separation of one member from the other when the sheets on which the members are installed are pulled in any but the one desired direction;
- Figs. 5 and 6 are sectional views illustrating another form of socket embodying the invention, the section of the separate figuresbeing taken at 90 to each other;
- the body ID of the socket is preferablyia one-piece sheet-metal shell comprising a crown portion ll having a central opening 12 for receiving the end of a rivet I3 by which the body is secured to a supporting sheet M a back flange l5 extending more or less abruptly outward from the margin of the crown; and a peripheral wall l6 extending forwardly from the back flange, these various portions forming collectively a recess H for receiving the head of upon a second supporting sheet [9.
- the spring element of the assembly is preferably a simple split rin 20 located in the stud-receiving recess H where it may engage the contracted neck portion 2
- the recess l'lv is somewhat larger at its rear than at its forward end, whereby the spring element may have some backward and forward movement therein. Thisis very simply accomplished in the preferred embodiment by tapering the wall 16 inwardly from its juncture with the back flange 15 toward its mouth 22, although any other suitable expedient mayibe adapted to accomplish the desired result.
- the above-described socket may be snapped into engagement with a cooperating stud
- the constructional features of the socket are such, however, that it cannot be disengaged from the stud except by the application of a pull to the fastened supporting sheets l4 and H1 at one particular place.
- the separating operation is illustrated in Figs. Zand 3, where it will be observed that a pull upon the sheets immediately above and below the inturned lip 23, as indicated by the arrows, has the effect of tilting the socket and the stud relative to each other in such away that the entire spring ring 20 then lies within the enlarged rear portion of/the body immediately adjacent the back flange l5.
- the one-way limiting means on the socket namely, the lip 23 of Figs. 1 to 4, or the downx turned ends 21 of the 'rlngand the :internal lips 28 of Figs. 5 and 6-must be held in a definite relation to the supporting sheet, and the same ing cap 30 (Fig. 7) which indicates the point of applicationtof .a separating pull.
- the crown of the socket and the underside of the cap are provided with a series of tines 3
- its body is a sheet-metal shell which is in the stud-receiving recess; that the recessshall have. an enlarged .rear portion within whichithe spring may expand anda constrictedportioniadjacent its mouth which istoo small to allowsufficientexpansion of the spring to release theuhead of a cooperating stud,.and, finally means fonholding a portionofthe ringwithin the enlargedrear part of the recess where-it may always expand,
- the socket. of the-invention may :be combined with a conventional form-oi stud, as is shown :in
- the stud is of standard constructionpand its headils deformed insuch away-as to:form:a porti'on 32 which projectsslightly beyond atrue circle'having its center :coincident :with that of *the .stud head, whereas the immediatelyadjacentportions 33 are drawn' back. equally slightly inside of that theoretical icircle.
- This deformation. issmslight as to make nddifierence inithesnappingvof'sthe stud. into engagement with itsxsocket inzthewordinary fashion.
- the stud member of Fig. 8 must be installed upon its supporting sheet with the projecting portion 32 of its head so disposed that it will underlie the oneway limiting means of a cooperating socket when the members are mutually engaged.
- the base of the stud preferably has a series of tines 34 which are adapted to dig into the supporting sheet during the setting of the stud so that they may hold the stud against rotation in its normal usage.
- a stud member comprising a base adapted to be secured to a supporting sheet, and a central upstanding post having an enlarged head and a contracted neck lying immediately behind said head, said head being of substantially circular cross section and having two adjoining sectors with their outer surfaces lying slightly inside of a circle drawn from the center of the post and coinciding with substantially all other parts of the head.
- a stud member comprising a base which is adapted to be secured to a supporting sheet, and a central upstanding post having an enlarged head and a contracted neck lying immediately behind said head, said head having one sector which projects slightly beyond a true circle drawn from the center of the post, and a sector at each side of such projecting portion which lies slightly inside of such circle.
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