US712155A - Diamond-cutting. - Google Patents

Description

No. 7|2,|55.' .Patented Oct. 23, I902.

- w. ntsannou, DIAMOND CUTTING.

(Application filed Apr. 2, 1902.)

-(No Ilodel.)

K b lul J f l H b 13 9 v [Mm/5555s.- INVENTOR.

ATTORNEY? UNITED STATES PATENT OFFICE.

NVILLIAM D. SEDDON, OF PATERSON, NEW JERSEY.

DIAMOND-CUTTING.

SPECIFICATION forming part of Letters Patent N 0. 712,155, dated October 28, 1902. Application filed April 2, 1902. Serial No. 161,138- (No model.)

To all whom it may concern:

Beit known that I, WILLIAM D. SEDDON, a citizen of the United States of America, and a resident .of Paterson, in the State of New Jersey, have invented a new and useful Improvement in Diamond-Cuttin g, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

The invention relates to the cutting of diamonds or other precious stones; and it consists, essentially, in cutting the upper and lower surfaces to form peculiarly shaped facets, as will be hereinafter fully described, and particularly set forth in the claims.

The principal object of the invention is to enhance the brilliancy of precious stones, more especially diamonds, to intensify the prismatic hues, and to increase the receptive and reflective surface by incisive or what may be termed inside cutting.

In the drawings, Figure 1 is a top view of the diamond according to myinvention; Fig. 2, a side elevation; Fig. 3 a View of the bottom; and Fig. 4 is a vertical section taken along the valley-line 0, showing the formation of the valley.

Referring to Figs. 1 and 2, it will be seen that the table or top of the upper part of the stone is formed of horizontal ridges or edges b b, which meet and intersect at the center in the same horizontal plane, having sloping triangular sides or facets a a a, radiating from the center, forming the valleys cc between them, said valleys sloping from the center toward the girdle. These prismatic facets are surrounded by a series of pentagonal and triangular facets d d d and e e e, forming the bezel and reaching to the girdle of the stone.

The lower or under side of the stone, as shown in Figs. 2 and 3, has a deeply-cut set of valleys between ridges, forming sloping triangular facets at the extremity in lieu of the apex or culex of the inverted polygonal pyramid which forms the bottom of the common brilliant cutting, and in this lower prismatic table the ridges or edges ff meet and intersect at the center in the same horizontal plane and have sloping triangular sides or facets g g, radiating from the center, and the valleys it A: between them, that slope from the center toward the girdle. These facets are surrounded by a series of pentagonal facets hh k, that form the sides of the inverted truncated cone, and a series of triangular facets t't'z', reaching to the girdle, which is the base of the truncated cone.

My improvement, as will be seen, cuts the what I claim as new, and desire to secure by Letters Patent, is-- 1. As an article of manufacture, a diamond, or other precious stone, the table or top of which consists of ridges b b, lying in a common horizontal plane intersecting at a common center, and having sloping triangular sides or facets, a a a, radiating from the center, forming between them the sunken portions or valleys, c c, which slope from the center toward the girdle, and a series of pentagonal and triangular facets, d cl d, and e e 6, respectively surrounding the facets a a a, forming the bezel and reaching to the girdle of the stone, substantially as set forth.

2. As an article of manufacture, adiamond, or other precious stone, having its top or upper face suitably cut and its bottom or lower face at the central extremity consisting of ridges f f, in the same horizontal plane and intersecting at the center, and which have sloping triangular sides or facets g g, radiating from the center, forming between them the sunken portions or valleys k k, that incline from the center toward the girdle, and a series of oblong pentagonal facets, h h h, and a series of triangular facets, i t' 71, respectively surrounding the facets g g and reaching to the girdle, substantially as specified.

3. As an article of manufacture, a diamond or other precious stone, the table or top of which consists of edges or ridges in the same horizontal plane intersecting at the center and which have sloping triangular sides or facets, radiating from the center, forming befrom the center toward the girdle, and a series of oblong pentagonal facets and a series of triangular facets respectively surrounding tween them sunken portions or valleys that slope from the center toward the girdle, and a series of pentagonal and triangular facets surrounding the said facets forming the bezel the said facets and extending to the girdle. and extending to the girdle, and its bottom In testimony whereof I affix my signature or lower face at the central extremity consistin presence of two witnesses.

ing of ed es or rid es in the same horizontal plane an d intersezting at the center, and WILLIAM SEDDON' which have sloping triangular sides or facets, Witnesses: radiating from the center, forming between JOHN F. KERR, them sunken portions or valleys, that incline GUS. LANG.

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