US1341043A - Snap-fastener - Google Patents

Description

F. S. CARR.

SNAP FASTENER. APPLICATION FILED LAN. 31 1.919.

-1 ,$41,043. Patented May 25, 1920.

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FRED S. CARR, OF NEWTON, MASSACHUSETTS, ASSIGNOR TO CARR FAST'ENER COMPANY, 0F CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

'SNAP-FASTENER.

Specification of Letters Patent.

Patented May 25, 1920.

To all 'whom t may concern.'

Be it known that I, FRED S. CARR, a citizen of the United States, and a resident of Newton, in the county of Middlesex, `Commonwealth of Massachusetts, (whose postofiice address is care of Carr Fastener Company, Cambridge, Massachusetts,) have invented an Improvement in Snap-Fasteners, of which thefollowing description, 1n connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a snap fastener comprising a socket member adapted to be attached to one of two parts or members to be connected, and a stud member adapted to be attached to another part or member, the socket member being provided with spring fingers adapted to engage the stud member.

This application is in part a substitute for and in part a renewal of my application Serial No. 215,890, filed February 7, 1918. y

The invention is embodied in certain im provements in the socket member, and has for one of its objects to provide a socket member having spring fingers which, while adapted to effectively engage a stud member, are free from liability to set or lose their resilience when subjected to protracted use.

Another object is lto provide a construction adapted to resist pressure tending to impair thev usefulness of the socket member.

To these and other related ends the invention consistsin the improvements hereinafter described and claimed.

0f the accompanying drawings forming a part of this specification,-

Figure 1 is a plan view of a socket member embodying a preferred form of one illustrative embodiment of my invention;

Fig. 2 is a side elevation of the same;

Fig. 3 is a section on line 3-3 of Fig. 1, showing the socket member attached by its prongs;

ig. 4 is a section, corresponding to the section shown in Fig. 3, the. fastener illustrated being of the type which is adapted to be sewn to the fabric and having the stud-engaging jaws thereof modified to ren- -der the socket reversible.

Fig. 5 is a view similar to Fig. 3, omitting the prongs, and an edge view of a stud menber engaged with the socket member; an

Fig. G is a view similar to Fig. 5, showing the spring fingers flexed from their normal position by the head of the stud member.

The several figures are considerabl enlarged from the actual size of the evice when the latter is intended for use as a placket fastener, which is one of the uses at present contemplated, although the size of the device will obviously depend on the purpose for which it is to be used.

The preferred form of my improved socket member shown in the drawings is circular, is formed from a single piece of sheet metal, and comprises a continuous inexpansible ring 12, which is preferably substantially cylindrical and is adapted to bear at its inner end on a carrying part 18, and a series of arched spring fingers 13 projecting radially inward from the outer edge of the ring into the space surrounded by the ring. The 4opposite ends of the ring are preferably'of substantially equal diameter. The free inner ends of said fingers are curved, as shown by Fig. 3, to conform closely to the periphery of a stud member 14 which is circular in cross section. Said curved ends are substantially flush with the outer end of the ring, and abut against each other and form a practically complete circle, or may be slightly separated, as shown by Fig. 1. When the stud member is being inserted the larger portion of its head bears on the free ends of the fingers and flexes them outwardly, as shown by Fig. 6, until said head passes the free ends of the springs, whereupon said ends spring into engagement with the reduced inner or shank portion of the stud, as shown by Fig. 5.

In the embodiment of the invention shown by Figs. 1, 2 and 3, the ring 12 is provided with prongs 12a adapted to penetrate a carry- :ing part or member 18 and be clenched therej on, as shown by Fig. 3. Vhen theseY prongs are employed, the arched edges of the fingers may be in close proximity to each other, the triangular openings hereinafter described being unnecessary.

The arched edges of the fingers 13 may be arranged so 'that they form, in conjunction with portions of the ring v12, substantially triangular openings, the edges of adl a carrying part 18, as shown by Figs. 4,

jacent ngers diverging from each other from the inner to the outer end. This form permits sewing thread to be applied to or passed around portions of the ring to form stitches 17 attaching thesocket member to and 6.

The arched fingers 13 are resilient throughout their entire length, or from the `use.

points where they join the ring 12 to their stud-engaging inner ends. In other words, substantiallythe entire zone of the socket member between its peripheryand the studengaging ends of the fingers is resilient and is composed of a plurality of independently resilient portions, each of said portions being an arched finger 13. The said independently resilient portions free from liability of losing or fsetting as their resilience a result of long continued 'When the stud and socket menibers are engaged in the manner shown by Fig. 5, the freeinner ends of the fingers bear on the base 14a of the stud member, and are supported by said base and the stud member. against pressure on the crowns of .the arched fingers tending to flatten the arches. /The base 14al of the stud member may be attached by stitches or otherwise, to a carrying part 20. Owing to the fact that the outer ends of the arched fingers are connected with theouter end of the ring, while their inner ends are substantially flush with said outer end, and their crowns are substantially fiush with the innerl end, the ring 12 constitutes an annular inexpansible wall in which the fingers are housed. Said wall surrounds the arched fingers and acts to resist pressure tending 'to fiatten the arches, the axis of the substantially cylindrical ring being substantially 55 of my invention slightly offsetby Figs. 4, 5 and 6, so

perpendicular to the planes of the carrying parts 18 and 20 and to the plane of the base of the socket member bearing on the part 18, so that the ring constitutes an annular pressure resisting strut.

The outer edges of the exposed stitch-engaging portions of the ring 12 may be inwardly from the plane of of the lingers 13, as shown that the stitches 17 are protected against wear by the base 14a of the stud member.

' have shown in Figs. 1, 2 and 3 a form adapted to be secured to a fabric by clenched prongs. In Figs. 4, 5 and 6 I have shown a form of my invention adapted toA be secured to the fabric by sewing or stitching. To avoid trouble in the outer ends case the socket is inadvertently stitched to arched fingers terminating the fabric wrong side up, I have shown the substantially centrally o the vertical dimension of the socket, the ends being slightly straigtened or fingers are by the body 14 of yThe arch 'fingers shown in Figs. 4, 5 and are, however, resilient from stud-engaging end, thereby preventing setting of the fingers by long continued use.

The inner'edge'of the ring 12 may be reinforced and thickened by folding it as shown at 21, Fig. 6, thus forming a rounded edge of greater thickness than that of the -metal ofy which'the ring is formed.

While I have shown and described a preferred form of one embodiment of my invention, it will be understood that changes involving omission, substitution, alteration and reversal of parts, and even changes in the mode of operation, may be made without departing from the scope of my invention, which is best defined in the following claims.

Claims:

1. A snap fastener comprising a continuous substantially cylindrical inexpansible ring having opposite ends of substantially equal diameter, the axis of the ring being substantially perpendicular tothe planes of its ends, and a plurality of arched spring fingers .integral with the ring, joined at their outer ends to one end of the ring, projecting inwardly Ctherefrom, and having inner `ends formed to engage a stud member,- each finger being resilient from the ring to its studengaging end, whereby setting of the fingers by long continued use is prevented, the fingers forming a zone which is resilient from the ring to the inner ends of the fingers and is housed within the ring and protected thereby against pressure tending to fiatten the resilient arches formed by the fingers. 2.A snap fastener comprising a .continuous substantially cylindrical inexpansible ring having opposite ends of substantially equal diameter, the axis of the ring being substantially perpendicular to the planes of its ends, and a plurality of arched spring fingers integral with the ring, joined at their outer ends to the outer end of the ring, projecting inwardly therefrom, and having stud-engaging inner ends substantially fiush with their outer ends and with the outer end of the ring, and crowns which are substantially flush with the base end of the ring, each finger being resilient from the ring to its stud-engaging end whereby ting of the fingers by long continued use is prevented, the lingers formino a zone which the ring to the is resilient from the ring to the inner ends fingers integral with the ring, joined at their 4ring between the fingers are `adapted to en-v gage attaching stitches.

4. A snap fastener comprising a socket having an inexpansi'ble marginal portion and a plurality of arched spring fin ers.

resilient substantially throughout t eir length extending inwardly from said marginal portionand joined at their outer ends l to said portion, the inner ends of said fingers formed to engage a stud member, said marginal portion forming a housing surrounding and protecting said fingers.

A `socket for separable fasteners including a peripheral housing portion anda plurality of arched spring fingers integral with said housing ortion, projecting in-v wardly from one e ge thereof and arched throughout substantially their entirelength from the housing portion to the stud-engagirg terminals of said fingers.

\ 6. socket for separable fasteners including a peripheral housing portion and a plurality of arched spring fingers integral with saidt housing portion, projecting inwardly from one edge thereof and arched throughout substantially their entire length from the housing portion to the stud-engaging terminals of said fingers, said-finger portions lying entirely between the plane of the top of said housing portion and the plane of the bottom thereof.

7. A socket for separable fasteners including a peripheral housing portion and a plurality of arched spring fingers integral with said housing ortion, projecting inwardly from one e ge thereof and arched throughout substantially their entire length from the housing portion to the stud-engag ing terminalsyof said fingers, the terminal portions of said fingers being located substantially midway between the plane of the top of said housing portion and the plane of the bottom thereof.

In testimony whereof I have signed my name to this specification.

FRED S. CARR.

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