US1739464A - Extension device - Google Patents

Description

Dec. 1 1929. I P. w. JONES 1,739,464

EXTENSION DEVICE Filed March 2, 1929 A9 I mmvroa.

[39/01'1 4] W./o/zes.

ATTORNEYS.

Patented Dec. 10, 1929 sir-Ares:

Eur QF FliCEi rnn'clvAn-iwi JONES, OF WAB'WIGK; RHODE ISLAND, AssIGNo'E'rd-RosENHEIW Inc; OFPROVIDENCE;'IRHODEISLAND, A co'RPo'R-ATIoN QF RHODE ISLANJJ EXTENSION. "DEVICE? Application": filed March 2,

This: invention relates" to a =foldable ex-- A1-fu-rtherv objectt of; the: invention-- isthe provision of a claspwhich will be readily resilient 1 fonrunelasping pu-rposes but which will retain? thew-sections; in folded position against -suoh strainsvaswfrequentlyoccur in the strap when in use-.2-

- '25 invention consists 50f: certaintunovel features in i foldedposition;

Fig. i5 israwsectiona' l view-"of the same;

Figszfi -is: a perspective? View partially in section-i showingr thee -pivoted fingerpiece at the end of one of the strap parts;

Fig.3? isva perspective view ofthe member havingggthe"fingerpiece-=thereonb:

IIIJlShB' USGTOf Wrist Watch strapsfit is found desirable-to*provide-a foldab'le-extension'device. *WlllhIIIZlY ibe'i' unfolded-to enlarge the encirclinggsize 'of the Wrist band to permit the Wrist: watchiconnected thereto, to beremovedwfrom the hand ofvthe' wearenwithout 1929 Serial-'No. 344;0102- disconnecting any ofthe parts and it -is" further desired-to hold tliese foldableip arts together by a resilient-clasp -which twill have suflicient inherent spring of the stock-topmventunclasping of the parts by vthe usualstrainstowhich a device-bf thisscharactei is-subjected; It is -also-desired to "provide a finger-engagin g part which may;v be readilymanually engagedsto easily -unclasp;;the"=sec tionsto permit them-to be *swun g onetheir pivots to unfolded position; and in-order to accomplish this desired result I have formeda clasp byproviding; spaced slits-in the, side. Walls of the channelsection to i-form --finger+. pieces-i between the S1-itS'rt0* engage-protuberances on, the side edges of a plate'section-ande resiliently hold the sections in-folded-qposi tion and -I have also pivoted .-to-:the end5of one ofthesections a member havinggafinger piece extending ttherefrom which may vbe readily engaged to 1 cause anunelaspin-g ;of the sections-permitting them to swing ,oneon the other; and the following is- 'ardetailed. description ofthe presentcmbodiment'otthis invention and illustrating the preferred means byq-which these-advantageousmesults may be accomplishedi I With-*referenceto the drawings; desig; nates channels sectionthaving side 1 Walls 11- and 12 andabottomwalk-13. Th6-SldG Walls "of this section:- are- -sli-tat 5a point in- Ward-from its end as at 14-ande15-to pro vide' between the slits aresilient finger -16'and in orderthat the resiliency -of this finger may be enh-anced th'e slits 14 Z and,' -=extend into the bottonrwall- 13 aswilh be apparent from Fig. 1.

Aaplate section 17 is hinged as atu'18to the channel section 'and may be folded into the channel section: byswinging-about the hinge 18'and held in foldedpo'sitionby the arc-shaped protuberances orportions 19' extendinglaterally from theopposite edges of thesection 17 intermediate itsfendsand engaging With and betweenthefingers 16 i edgesQO are then irever'selycurved-outward- I ly, as illustrated in Fig. 3, in order to form a flaring entrance for'the protuberances on the edges of the plate section 17.

A strap part 21 consisting of a plurality of block links is connected to the channel sec tions 10 bymeans of a pivot pin 22 engaging the side walls 11 and 12 thereof, while the strap part 23 is connected between ears 24 bent up from the side of the plate section 17 by a pivot pin 25 engaging the member 26 which has a fingerpiece 27 extending from one edge thereof to overlie the strap part 21 and provide a portion for engagement by the fingernail to lift the section 17 from clasped position to permit it to be swung about its hinge 18 to unfolded position.

The member 26 is shaped to conform to the appearance of the links of the strap part 23 and serves as a terminal or end thereof with wire'portions 29 for connecting it to the remainder of the strap part 23 and the member is provided with a pair of eyes 30 extending from its upper surface thru which the pivot pin 25 extends to hold it in position.

The section 17 is notched as at 28 in order to prevent the fingerpiece 27 from engaging with the section 17 when the device is in extended position, as illustrated in Fig. 1, and thus prevent the exertion of leverage by a pull on the strap 13, between the connections of the member 26 and the section 17 which might injure the parts. v

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of restoring to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. An extension device for a wrist strap comprising a plurality of sections hinegd togetherto fold one over the other, portions extending laterally from the opposite edges of one of said sections intermediate its ends, and arch-shaped resilient fingers on another of said sections between which said portions may snap to hold said section in folded position, said fingers being arc-shaped in the longitudinal direction of said sections.

- 2. An extension device for a wrist strap comprising a plurality of sections hinged together to fold one over the other, arc-shaped portions extending laterally from the opposite edges of one of said sections intermediate its ends, and resilient fingers on-another of said sections between which said portions may snap, said fingers being arc-shaped in the longitudinal direction of said sections'to engage the said portions along an extended surface and hold said section in folded position.

3. An extension device for a wrist watch strap comprising a pair of sections hinged to gether to fold one on the other, one of said sections being in plate form with protuberan e on itsopposite sides and positioned adjacent but spaced from its free end, the other section being channel shape in cross section with each of said channel walls having a pair of spaced slits forming between the slits a resilient finger, said fingers being positioned to extend over said protuberances when snapped therebetween.

4. An extension device for a wrist watch strap, comprising-a pair of sections hinged together to fold one on the other, one of said sections being in plate form with arc-shaped bulging portions extending from its opposite sides and positioned adjacent but spaced from its free end, the other section being channel shaped in cross sections with each of said channel walls having a pair of spaced slits extending a short distance into the bottom of said channel section forming between the slits a resilientfinger, said fingers being curved on substantially the arc of said bulging portions to engage the same throughout thecurved surface I and bent inwardly and outwardly at their edgesto receive and extend over said bulging portions when snapped therebetween.

5. An extension device for a wrist watch strap, comprising a pair of sections hinged together to fold one over the other, means for 'releasably retaining said sections in folded position, ears on one of saidsections, a member. pivoted in said ears, a fingerpiece extending from said member for manual engagement to unfold said sections, and a notch in the end of said sections to prevent engagement of said fingerpiece and section when in unfolded position. r

6. An extension device for a wrist watch strap comprising a pair of sections hinged together to fold one on the other, one of said sections being in plate form, the other section being channel shape in cross section with each of said channel walls having a pair of spaced slits forming betweenthe slits a resilient finger, said fingers being positioned to extend over the edges of said plate section when snapped therebetween.

7. An extension device for a wrist watch strap comprising. a pair of sections'hinged together to fold one on the other, one of said sections being in plate form, the other seeeach .of said channel walls having a pair of spaced substantially parallel slits forming between the slits a resilient finger, said fingers being'inclined inwardly-to extend over the edges of said plate section when snapped therebetween.

. 8. An extension device for a wrist watch strap, comprising a bottom section and a top section hinged together with the top section overlying the bottom section, means for releasably retaining said sections in folded potion being channel shape in cross section with sition, and a member having a fingerex tene I sion for manual engagement pivoted to the outer surface of the free end of said top section for lifting or pulling the free end of the top section away from the bottom section.

9. An extension device for a Wrist Watch strap comprising a bottom section and a top section hinged together with the top section overlying the bottom section, means for releasably retaining said sections in folded position ears on the top section adjacent its free end and extending outwardly therefrom, a member pivoted in said ears and a finger-' piece extending from said member for manual engagement to lift or pull the free end of the top section away from the bottom section.

In testimony whereof I afiix my signature.

PERGIVAL W. JONES.

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