US2302426A

US2302426A - Extension bracelet

Info

Publication number: US2302426A
Application number: US443591A
Authority: US
Inventors: Charles A Domler
Original assignee: Hadley Co Inc
Current assignee: Hadley Co Inc
Priority date: 1942-05-19
Filing date: 1942-05-19
Publication date: 1942-11-17
Anticipated expiration: 1959-11-17

Description

Nov. 17, 1942. c. A. DoMLER 2,302,426 y EXTENSION BRACELET Filed May 19, 1942 Patented Nov. 17, 1942 EXTENSIGN BRACELET Charles A. Domler, Providence, B. I., signor to The4 Hadley Company, Inc., Providence, B. I., a corporation of Rhode Island Application May 19, 1942'. Serial No. 443,591

3 Claims. (Cl. 59-79) This invention relates to an extensible, selfretracting bracelet and like articles of jewelry,

and its principal object is to provide a bracelet linkage which is of simple design and attractive appearance, which is of light weight and of durable construction, and which embodies a minlmum number of parts that can be economically manufactured and quickly assembled.

Further objects relate to various features o construction and will be apparent from a consideration of the following description and accompanying drawing, wherein:

Fig. 1 is a top plan view ofa bracelet constructthrough the bracelet linkage;

Fig. 5 is an enlarged transverse section through one of the pairs of links;

Fig. 6 is'a view of the retracting spring; and

Fig. 7 is an enlarged detail showing the inter- Aengageable stops for limiting'telescoping movecated in Figs. 4 and 5. At points corresponding to the ends of each pair of links the convolutions of the spring I2 are distorted to provide openings I4 through which extend pivot pins l5 (Figs. 4). The pivot pins I5 project through aligned openings formed in the end ofthe outer link of one pair and the end of the inner link of the adjacent pair. Thus the pivot pins I5 not only pivotally connect the end of the inner link 'of one pair with the end of the outer link oi the adjacent pair, but also serve to maintain in position the sections of the coil spring I2 dened by the distorted convolutions so that each section of the spring is operative normally to hold each pair of links in retracted position.

-When a linkage constructed in accordance with the present invention is extended, the inner links of each pair slide outwardly until the stops I0 and II engage, as shown in Fig. 7, and when the extending force is released, each section of the spring I2 acts upon its associated inner link to effect retraction. Since the inner and outer links are substantially coextensive in length, and as the stops I0 and II are formed at their respective ends, the linkage herein shown may be extended y to a length .which is substantially twice that o! ment of the links from retracted to extended position. y

In the embodiment herein shown for the purpose of illustration, the numerals I designate bracelet linkages which are pivotally interconnected at adjacent ends to a coupling link 2 and 4link 5 and an inner tubular link 6 telescopically disposed for sliding movement within the outer of each pair is 'formed/With a pair of spaced longitudinally extending depressions 8 (Fig. 5),

and one end of each inner link is formed with a pair of outstanding lugs I0 which provide stops at the end ofthe depressions 8, as shown in Figs. 5 and 7.. The end of each outer link, opposite the .end of theinner link which carries the stops I0, is kformed with inwardly projecting stops II engageable with the stops I0, as shown in Fig. 7,

to limit telescopic movement of the links froml retracted to extended position.

Each linkagev I also includes a single coiledv tension spring I2 (Fig. 6) which extends from one itsretra'cted position.

' In the completed bracelet herein shown, two sets o linkages Vare employed, although it is to be understood that one or several sets of linkages may be used, and in any case but o ne spring ior each-set oi.' links'is used. In this embodiment the pivot pins I5 connect the adjacent ends of tha inner links 6 to the coupling 3, and at the op-l posite ends of each linkage the pins merely serve to anchor the ends of the spring I2, it. being noted that the outery terminal links are formed with tongues I8 by means of which the linkages are attached to the loops 3.

40 While I have shown and described one desirable .link 5, as shown in Figs. 3 to A5. The inner link embodiment of the invention,'it is to be understood that this disclosure is for the purpose of illustration and that various changes in shape, proportion and arrangement of parts, as well as the substitution of equivalent elements for those 'herein shown and described, may be made without departing from the spirit and scope of the linvention as set forth in the appended claims.

I claim:

1. A bracelet linkage comprising a plurality of pairs of links, each pair consisting of an outer tubular link and an inner tubular link telescopically disposed within the outer link, a coiled tension spring extending through the inner links end of the linkage to the opposite end, as indi- 56 and operativenormally to maintain the links in retracted relation, the convolutions of said spring at points corresponding to the ends of each pair of links being distorted to provide openings, and a pivot pin projecting through each opening of the distorted convolutions so as pivotally to connect the end of the inner link of one pair with the end of the outerv link of the adjacent pair. 2. A bracelet linkage comprising a plurality of pairs` of links, each pair consisting of an outer tubular link and an inner tubular link telescopically disposed within the outer link, one end o! the outer link and the opposite end of the inner link having projecting parts providing interengageable stops for limiting telescopic movement from retracted to extended position, a coiled tension spring extending through the inner links and operative normally toy maintain the links in retracted relation, the convolutions of said spring at points corresponding to the ends of each pair of links being distorted to provide openings, and a pivot pin projecting through each opening of the distorted convolutions so as pivotally to connect the end of the inner link. of one pair with the end of the outer link of the adjacent pair.

3. A bracelet linkage comprising a plurality of pairs of links, each pair consisting of an outer tubular link and an inner tubular link telescopically disposed within the outer link, the inner link of each pair being formed with spaced longitudinally extending depressions and one end of said inner link having upstanding lugs providing stops at the end of said depressions, the outer link of each pair having inwardly projecting lugs providing stops at the end opposite the stops on the inner link, the stops being engageable to limit telescopic movement of the links from retracted to extended position, a coiled tension spring extending through the inner links and operative normally to maintain the links in retracted relation, the convolutions of said spring at points corresponding to the ends of each pair being distorted to provide openings, and a pivot pin projecting through each opening o1' the distorted convolutions so as pivotally to connect the end of the inner link of one pair with the end of the outer link of the adjacent pair.

CHARLES A. DOMLER.