US839357A - Process of dividing diamonds. - Google Patents

Description

UNITED-STATES PATENT Omen JOHN, wom YORLgN- p Y., F'HJCESS 0F 'DIVIDING DIAMONDS@A Originalapplioation led May 3i, 1906, Serial o. 316,109. Divided and this application led August 13, 1906. Serial No. 330.434.

To all whom t may concern:

Be it known that I, ST. JOHN Woon, of

i New York, in the county of New York and in AIO the State of New York, have invented a certain new and useful Improvement in the Processes of Dividing Diamonds; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which- Figure 1 is a perspective view of a rough diamond or crystal divided into slices or wases .Fig 2 is a-plan view of a slice or was. Fig. 3 is a view ofthe first block removed from the slice or was. Fig. 4 is a view of the second division of the slice or was. Fig. 5 is a view of the final division of the slice or was.

In the preparation of the diamond for sale to j ewelers or consumers it is not alwa s feasible tofinish up eachrough diamond lnto the largest gem it is os-sible to make therefrom, but because the emand for the largest gems is comparatively small it is necessary to divide a large proportion of rough diamonds to form a number of small diamonds from each rough diamond. In my application for patent filed May 3, 1906, for process of dividdescribed a process of dividing a rough diamond or crystal so that the largest ,possible weight of smaller diamonds can be made from it. Prior to my said process the division of the larger` crystals into several parts to `make smaller diamonds has been accomplished by cleaving or splitting the Arough diamond or crystal, and as suchaction can usually take place only in planes parallel to the faces of the crystal it has l'prevented the division of crystals in planes so disposed as to give shapes from which the largest possible finished diamonds .could b e made, and a very objectionable amount of-waste has resulted from the use of this method.A B the method which is the subject of my sai prior application instead of using the wasteful method of cleaving or splitting I saw the body of the crystal through in any direction, and yI discovered that this could be done withouty inl the leastA fracturing the diamond or otherwise injuring its. purity or affecting its value. As Iwas thus able to divide the ycrystal in any direction, I devised a method of dividing the crystal by which a maximum weight of smaller iinished diamonds could be .produced ent, is a special application of the process of the aforesaid application to the division of .6 5 In practicing my present invention I first,

a slice or was of a peculiar shape.

divide the crystal into slices or wases, as illustrated in Fig. '.1. The average slice or was has three sides to its larger face, and ordinarily these sides are of equal length. With some crystals, however, a slice or was is obtained of the shape illustrated in Fig. 2, in which there are two long sides c and b, connected by a short side c. In order to divide the said slices into blocks from which Patented 13610.25, 190e. l

the finished diamonds are to be obtained, I

first saw into a slice from the side a or the side b near the point d, where the sides a and b meet, the saw cut e penetrating to about the longitudinal center of the slice. I then make a saw cut f from the opposite side to meet saw cut e, and thus remove a block g from the point of the was. I then form a saw cut t through the longitudinal center of l the slice or was and divide it into two parts i and 7c, as illustratedin Figs. 3 and 4, which are each again divided by saw cuts that are preferably substantially pe endicular either to the outer or inner ed es t ereof.

ivide the slices into B this method I bloc s which produces a much lar er weight of finished diamonds than is possible by the old method of cleaving, since by cleaving all of the divisions would have t0 be in planes parallel to a face of the was.

I claim- 1. The process of dividing an elongated slice or was of a large diamond to form smaller diamonds, which consists in removing a block from the point of the slice by di-l visions starting on opposite sides of such point and meeting at an angle to Aeach other, separating-the remainder of the slice b a central longitudinal division, and divi 'ng the two portions thus formed by transverse divisions. A

2. The process of dividing an elongated.

Aslice or "was of a larger diamond to form smaller diamon(ils,2f-Winchl consists .in remov- ,In testimony-[that I claim Athe.foregoing I ing a block from the point of the slice 4by two i 4have .hereunto set my hand. outs starting on opposite sdesf` such-,point l and meeting at an angle to each other7 di- 'ST' :JOHN WOOD' 5 viding the remainder of theslioe a central -Wi-tnesses:

longitudinal saw out, and dividing the two FREDI WM.` WOLTERS,

portions thus formed transverse saw outs. l AL. M, CUTHBERT.

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