US1103698A

US1103698A - Mechanical dop for polishing (cutting) diamonds.

Info

Publication number: US1103698A
Application number: US77334013A
Authority: US
Inventors: Edgard Soetens
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-06-12
Filing date: 1913-06-12
Publication date: 1914-07-14
Anticipated expiration: 1931-07-14

Description

E. SOETENS.

MECHANICAL D\P FOB. POLISHING (CUTTING) DIAMONDS. APPLICATION FILED JUNE 12, 1913.

1 1 Patented Jul 14, 191% Fig.1.

rrsn STATES PATENT orrion.

EDGARD SOETENS,

or BORGIERHOUT-IANTWERP, BELGIUM.

MECHANICAL D01" FOR POLISHING (CUTTING) DIAMONDS.

mosses.

I cal Dop for Polishing (Cutting) Diamonds,

of which the following is a specification.

My invention relates to a mechanical dop for cutting diamonds. 4

The object of the said invention isto cut the facets with the greatest possible precision and also to divide the facets, to obtain with great facility the angle of their position and slope by means of indications upon the dop itself.

I illustrate my drawing, viz:

Figure 1 is a plan View of the tongs and the dop. Fig. 2 is a side view of the tongs the mechanical dop in position for cutting the table or collet. Fig. 3 is a rear end view of the tongs. Fig. 4 is a cross section of the dop mounted on a swivel. Fig. 5 is a cross section of the dop mounted on hinges instead of on a swivel as in Fig. aface view of the dop. Fig. view of the dop.

The mechanical dop with holder as shown in the drawing is applied to the ordinary mills. The dop consists of a main body in the hollow of which is placed a rotary cylinder (2). This cylinder carries the small dop (3) in which the stone to be cut is device by the annexed 7 is a back placed. The extreme point of the small dop (3) which is in the cylinder is carried so as to be firmly fixed, at. the same time this small dop may be turned in the cylinder at will by means of a key or pincers if necessary.

To hold the stone in thesmall dop (3) two hooks or pineers are used; a' forked hook (l) and a fixing hook These two hooks are placed one behind the other. The forked hook (4:) holds the stone on two of its sloping sides (above the edge) while it is being cut. The fixing hook presses the table or collet and holds the stone .rigid while the cylinder turns. The forked hook and fixing hook are fixed respectively by the screws (6) and (7). Cylinder (2) bears upon its visible part diflerent divisions which are'regulated by a-small dent made in the extremity of the main part of the cylinder.

The divisions upon the cylinder made by by a screw (17) l. Fig. 6 is Specification of Letters Patent. Patented July 14, 1914, Application filed June 12,1913. Serial No. 773,340. 1

vertical lines correspond with the several face-ts to be cut on the stones, viz-Eight long lines equidistant from each other and by which the eight corners are cut. Eight shorter lines placed in the middle of the preceding eight lines and by which the star facets are cut. Sixteen still smaller lines in the middle of the immediately preceding lines by which the half facets are cut.

Screws (8) serve to fix the cylinder. The dop is attached to the of a swivel Fig. 4, or ried by a small tube made to fit an opening in the holder (12). The end of the holder is fashioned so the small tube may be fixed in the tongs or twee'zer. At the wide, rear extremity of the tongs, Fig. 1, are placed two levels (13) and two screws (19) by means of which'the tong may be set.

on the mill.

perfectly horizontally horizontally fixed, the

When the holder is small tube falls perpendicularly upon the mill, as the latter is also level.

When the surface of the stone, upon which a certain facet is to be cut touches the disk at the exact spot with the proper angle of incline obtained by the movable joints (10) or (11) the dop may be turned to right or to left in orderto find the grain of the stone without changing the angle of the incline of the facet. Thus no matter how the dop is turned in'the tongs, the same facet always touches the mill with the same angle of incline.

To turn the dop in the holder one has only to unscrew the screw (17). To regulate the size of the facet the holder is provided with a regulating screw (15'). For instance, when the first corner has reached the desired size, screw (15) is turned until it comes against the bridge (14) on a level with the mill. Screw (15) may then be prevented from turning by acounter-bolt, when screw (15) by the cutting of the following corners comes against the bridge, the dop can fall no farther and the other corners can be no larger than the first. The same follows for the star facets and half-facets.

What I claim and desire to secure by Letters Patent of the United States is: i

An adjustable dop comprisinga cylindrical carrier, :1 support therefor in which said carrier is rotatable about its axis of symmetry, tongs, and adjusting member carried by said tongs, a ball and socket joint between said support and said member, the ball of said joint forming a part of said support, and having in the apex thereof a, guiding slit in the main plane of oscillation thereof a set screw carried by said member, the

pointed end of which cooperates with said slit to guide the movement of said support Witnesses: v

J. J 0s. ROsENsHAMEL, G. DEIIERSY,