Ring sizing attachments er inserts, sometimes called guards, are well known i* the art in a variety of types. Traditionally, these de-rises are metallic and are attached tβ ring shanks by bending with a crimping tool er pilers. The pritr art derises have tended to be uncom¬ fortable in that they do net cβnfβrm well tβ the varying shapes of ^" fingers.

With the above in mind, it is the objective of this invent¬ ion to provide a more comfortable and efficient sizing attachment for finger rings which will conform well tβ the varying contours of fingers while adequately gripping the ring shank so as to resist undesirable turning of the ring on the finger of the wearer.

In accomplishing the above objective, a ring sizing attachment or insert formed of a thermoplastiβ is provided. The devise has an initially flat plate-like body portion equipped at opposite ends with curved and tap¬ ered ring shank gripping claws or jaws.

The devise can be snapped onto any ring in a generally flat state and when a finger is inserted through the ring, the thermoplastic device will yield, conform to the shape of the finger and exert a gentle spring force on the finger with a counter-force being transmitted to the ring. Body heat transmitted through the finger tends to slightly soften the thermoplastic material, rendering it more yielding and increasing its friction with the finger and ring shank .

Other features and advantage of the invention will become apparent during the course of the following detailed description.

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Brief Desβriptiβns βf the Drawings -

Figure I is a perspective view βf a ring sizing insert, according to the invention, in a relaxed state.

Figure 2 is a transverse vertielβ section taken on line 2-2 βf Figure 1.

Figure 3 is a longitudinal verticle sectiβn taken en line 3-3 βf Figure 1.

Figure k is a side elevatiβn βf the ring sizing insert being applied to a ring.

Figure 5 is a similar view showing the insert completely in-, stalled and being engaged by a finger βf a ring wearer.

Figure 6 is an enlarged cross section through the insert and ring taken on line 6-6 βf Figure _>.

Detailed Description -

Referring tβ the drawings in detail wherein like numerals des¬ ignate like parts, a ring sizing attachment βr insert 10 according to the inventiβn is ferred βf a suitable thermoplastics material which is prefer¬ able clear tβ render the devise incβnspicuβus. Frier tβ applicatiβn te a ring, the insert is essentially flat βr plate-like and pβssesses a unifβrm thickness through its length and width.

At its βppesite ends, however, the insert IS carries pairs of integral βppβsitβ side resilient claws 11 which are tapered toward their free ends, arcuate and cβnvergent toward the center of the flat body portion βf the insert, Figure 2. The Claws 11 extend beyond βne face only of the in¬ sert, and its βppβsite face smooth and unobstructed.

In addition te being tapered, curved and convergent as viewed from the ends βf the device, Figure 2, the claws 11 are alsβ tapering as viewed fr ^β m the side, Figure 3, in the manner βf truncated triangles.

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The outer inclined edges 12 of the claws 11, Figure 3, diverge toward the smooth flat face of the insert whose βppβsltβ end edges 13 are beveled en the same angles as theedges 12 of the claws.

The insert lβ while being relatively stiff is somewhat yielding and able to cβnfβrm tβ the shape of a finger l βf a wearer βf a ring V-> on whieh the sizing insert lθ is installed.

Installation is accomplished by merely forcing βr snapping the yielding claws 11 around the shank βf the ring 15, which typically has a cress sectional shape like that shewn in , Figure 6. When thus applied te a ring, the pairs of claws 11 will grip the ring shank snugly while the body pβrtion ef the insert 10 remains generally flat so as te bridge aeross a sector portion of the ring prior tβ the inserting βf a finger thrβugh the ring.

When the finger lU is inserted, Figure _>, the thermoplastics . insert will yield and assume an arcuate configuration generally conforming tβ the curvature βf the finger. This cβnfβrmability βf the insert It is en¬ hanced by its thermoplastiβ nature, respβnding tβ body heat transmitted to it thrβugh the finger. When becoming warm due tβ bβdy heat, the insert tends tβ soften slightly and better shapes itself tβ the finger and also to the ring shank. Its frietiβnal resistance to sliding on the finger and ring shank also tends to increase due tβ warming and softening.

As a results βf all of these factors, the sizing device accord¬ ing to the invention is mere eβmfβr able, mere convenient to use and more efficient in preventing ring movement on the finger than are the prior art devises for this purpose.

It is to be understood that the form of the invention herewith shown and described is tβ be taken as a preferred example of the same, and that various changes in the shape, size and arrangement of parts may be re¬ sorted to, without departing from the spirit of the invention or scope of the subjoined claims. suβs ruTs: SHEET