US1644562A - Safety clasp - Google Patents

Description

.E'atented Oct. 4r, T927.

i outfit fl M a RAY'lBnowNm pr BUFFALQ-ivnw Yonx 'sArn'rY CLASP. 1

Application filed October 12, 192 Serial No. 141,201., 3

U This invention appertainsto new and useful improvements in safety clasps deslgned primarily for joining the ends'of chains of every description and for every purpose but which is principally adapted. forarticles of jewelry such as necklaces, flexible bracelets, watch chains, and the like.

-- The primary object of the present inven- 'tion is to providesuch animproved safety clasp of the above character which is autom'atica'nd self-locking inits action so that all danger of the ends of the chain becoming accidentally. separated is positively precluded. 7

the plunger into active or looking position A further object of the present invention isthe provision of means for limiting the outward movement of the plunger relative to the sleevetogether with means for limiting the inward movement of said plunger.

A still further object of the presentinvention is to provide an improved safety clasp of the above characterwhich isslmple, yet durable in its construction, practical and efiicient in use, easy and cheap to manufacture and well designed for the purposes for which it is intended. v

Numerous other objects and advantages of the present invention will become more readily apparent during the courseof'the following description when taken'in connection with the accompanying drawings.

In the drawings forming a part'of this application and wherein for the purpose of illustration has been disclosed a preferred embodiment of the present invention;

Figure 1 is a longitudinal sectional view through an improved safety clasp constructed in accordance with the present invention. I V

Figure 2 is a sectional view taken substantially on the line 22 of Figure 1. Y

Figure 3 is a transverse sectional view taken on the line 3-3 of Figurel;

Figure 4 is a perspective view of the im proved clasp. Y

Referrlng now more in detail to theac-,

.companying drawings, it will be seen that the'presen't improved clasp embodies in its construction a hollow body 10 which may be of any desired shape and size and which is Slidably received within a ar-6 1115a plunger generally indicated by' the numeral 12, said plunger being provided at one end thereof with an opening 13 for receiving one end of a chainand at its opposite end with a hook 14%, for receiving the oppositeend of 2" the chain, the bill 15 of said hook terminating shortof the body of the plungerso as to provide a lateral throat 16. Of'course, the hooked end of the plunger may be formed to engage a rectangular shaped "link, mounted transversely or parallel with the plunger.

The plunger 12 is further provided intermediate its" ends witha longitudinally extending slot17 into which and from one end 'wall of which an'abutment stem 18 extends.

One end of this abutment stem'may be" provid'ed wit-h a suitable headif "desired. Carried by the body'lO and extending-transversely through the opening 17 isa stop pin 19. Encircling the abutment stem 18 is an expansion spring 20 having one end bearing against one end wall of the slot 17'and its Providedh. 3 ongitudinal bore ll therei- ,throughgf i a y opposite end bearing against the stop pin 19.

From the foregoing, it will be evident that the expansion spring 20 acts to automatically draw the plunger 12 inwardly so as to hold the hook 14 in active or locking position. The stop pin 19 serves to limit the inward movement of the plunger 12 while the abutmentstem 18 contacting with i the stop pin 19 serves to limit the outward movement of the plunger,

In the use of the present improvedclasp,

one end of a suitable, chain or the like is adapted to be secured within the opening 13 after which the plunger 12 is forced outwardly against the action of the spring 20 and the opposite end of thechain is then passed through the lateral throat 16c and engaged with the hook. Pressureu'pon the plunger is then released whereupon the action of the spring 20 will draw the plunger inwardly so as to move the hook into its locking or active position. When in such locking position, the bill 15 of the hook will i be positioned immediatelyv adjacent the end of the body whereby to close the throat16c and thus prevent the end of the chain from becoming accidentally disengagedfrom the hook. f

It will thus be seen that-there has been provided a novel and efficient safety clasp which is self-lockingand which will effectheeh v tem "rated, flhigolgsp may beuse in anyplace wherei'siueh a claspfimay be desirable; From m fie e pl gee or e ending-e" ho e body,

#1 Wifl i he Bald. fi th hq k M -en M if w e ammee wifl i he y e ,n z he plunger in a he; eonstizucti shown, it will that the: chain canbe r'eadi lyflen a ed with. or disengaged iromrthehook, 14 y s imply 'slid- Changes in the dam-fleet aiistr fictioil inaj 'ment iior the @mym abutment. stem to lirpi ht he nloveinenis"of the phmgef the tion; an abu tmeot" stem fcerri ed Y Q 'lungelizahdfiSfOp pin Within the body for imitlnglthe movement I of the1' Iung e r in an inward" direction and engageableby the end of theabut ment stemifol limiting the move,

3 ."A Safety clasp including a hollow body hayi l lg a longitqglinel .bore, =2 plunger, slid- .ment o fthe plunger in an outward direction;

ablyfnountil fwibhih' said body and provided with e ho o k afc one 8 1121, eaid'plunger being P Q RE W th l lngimdinally 6 tendi-ig g sliqt, "jabutlxie it ste n extendix g "int6-,th slot f l'filill ofie fllld 'Wall thereof fa zstopfpixifeglrried b Said body and ex'tenfd- "ari expehsionfeoil' spr ing' lu poi'l the abut rrie'nt V fiem having its ppo ite T nds" aring gain t t eis plpin a he "sh-i617 n W l 'd l plen 51 i i erlnenmally u gihgf ii movement of the 'plungerv to ."suoh position end the said pip-constituting also ah abut op ,osifiegdirection.

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