US1749440A - Clasp - Google Patents

Description

March 4, 1930. N. T. NELSON CLASP Fild July 8, 1929 IN V EN TOR.

ATTORNEYS.

Patented Mar. 4, 1930 UNITED STATES PATENT OFFICE NELS' T. NELSON, OF .ATTLEBORO, MASSACHUSETTS, ASSIGNOR TO J. F. STURDYS SONS 00., OF ATTLEBOBO FALLS, MASSACHUSETTS,,A CORPORATION OF MASSACHUSETTS CLASP Application filed July 8, 1929. Serial No. 376,697.

This invention relates to a clasp for band bracelet or the like of the type worn for securing a watch on the wrist of the wearer and has for its object to provide a sheet metal solderless construction with an imperforate top plate which may be embellished in any manner to form a suitable design.

A further object of this invention is the provision of a releasable clasp between two sheet metal members which has gripping engagement at two widely placed points in order to more firmly hold it in position.

A still further object of this invention is the formation of sheet metal detents positioned to receive the tension of the strap and to better resist flexing or bending.

With these and other objects in view, the.

invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appendedclaim.

In the accompanying drawings:

Fig. 1 is a top plan view of the clasp with a portion of the ribbon band attached thereto.

Fig. 2 is a top plan view of one of the mem- I hers of the clasp and showing the bottom of the other member of the clasp the members being detached and the ribbon lifted to expose these portions.

' ribbon band attached thereto.

Fig. 3 is a perspective view of the stud memberof the clasp with a portion of the Fig. 4 is a perspective view of the other or socket member of the clasp.

Fig. 5 is a sectional view on line 55 of Fig. 1.

Fig. 6 is a sectional view of Fig. 1 taken at right angles to the section of Fig. 5.

It is found of advantage to provide a clasp for a ribbon bracelet which will have a top detents, and I have also formed the opposite I 1 member with. cooperating portions for engagement with these detents to releasably hold the parts together and the following is a detailed description of the present embodiment of this invention illustrating the preferred means by which these advantageous results may be accomplished.

With reference to the drawings 10 designates the stud member and 11 the socket member of this ribbon clasp. The stud member is blanked from sheet stock with side we tensions 12 which are folded beneath the plate as illustrated in Figs. 3 and 5 and thence rolled'outwardly as at 13 to form resilient detents to snap beneath inturned portions of the flanges of the opposite member which will be presently described. The member 10 1s also provided with a slot l l'through which the end 15 of the ribbon band may be looped as at 16 and'sewed in position.

The socket member 11 is a sheet metal construction upon which side flanges 17 are formed by folding a portion of the stock at either side thereof as illustrated 'in Fig. 41-. A portion 18 of the. side flanges between slits 19 and 20 is bent inwardly to resiliently snap over the detents 13 of the stud member as will be apparent in Fig. 5.

Slots 21 and 22 are formed in the socket member by cutting and folding portions of the stock 23 into a position at right angles to the base 24 of the socket as illustrated in the perspective view Fig. 4. Each portion is folded to abut the edge of the inturned portion 18 as a stop which assists in aligning'the braces 23 in manufacture. The portions 23 serve a triple purpose; they form the slots 21 and 22 through which the ribbon 25 may be woven as illustrated in Fig. 6, to secure the socket member of the clasp in position. These portions 23 also brace the flanges 17 and prevents them from being collapsed inwardly. The portions also serve to engage the edges 29 of the detents 13 to resist a tension or pull on the ribbon band.

It will be understood that when the ribbon 25 is under tension there will be suflicient friction to prevent the socket member from sliding along the ribbon 25 and thus the same will be held in position in use.

The stud member 10 presents a broad surface 27 which may be embellished or ornamented as desired by a suitable design such as illustrated at 28in Fig. 1 ithout the interniptioiffof openings hr the like 'vv'hich have often been objectionable in a clasp of this character. Also, the detents 13 by preedges to the pu 1Ifoihe*stre presenttheir maximum resistance "Withofit liability of distortion.

The foregoing description is directed solely towards the constructiqn illustrated, but I desire it to be understoodthat rreserve the privilege of resorting to all the mechanical changes to Which the device is susceptible, the invention being defined and limited only by the terms of the'appefnded claim.

" I claim;

A clasp for ca b and bracelet or the like com-- prising a pair of; superimposed sheet metal members one member. having spaced transverse openings to slidably position itonai ibhon @band and the other, having an opening through whichfan end of the band'ni'ay be looped," in,tegralfside extensions on one rnem ber foldedtovvafd each. other andfthence outvvardly .rolledto ":Eor iifresilient detents presenting theiredg'esito the-tension on the band, and side flangeson the other member having inturnedporti'ons to engage said detents and releasably'holdi saidniembersjinengagemeiit, said flanges being Jbraced by .spac'edeut and folded up portibnsofthe' stock er said mend ber to engage theirinnerfsurfaces' and also engage. the edges of det'ent 's' and at the sametime vto iforrn the above 'jsaicl sp bed transverse openings for said "ribbon bii fiaif 1' k In testimony whereof .aflix ifiv'signature.

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