US18288A

US18288A - Island

Info

Publication number: US18288A
Authority: US
Publication date: 1857-09-29
Anticipated expiration: 1874-09-29

Description

UNITED STATES PATENT OFFICE.

ISAAC LINDSLEY, OF PROVIDENCE, RHODE ISLAND.

SETTING DIAMONDS, 66C.

Specification of Letters Patent No. 18,288, dated September 29, 1857.

To all whom t may concern.'

Be it known that I, Isar-xo LINDsLEY, of the city of Providence, in the county ot Providence and State of Rhode Island, have invented a new and useful Improvement. in the Mode of Setting Diamonds and other Stones, Natural or Artiicial, in an Open Setting; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

The object of this invention is to obtain a cheap setting that will give greaterbrilliancy to the stones than the setting commonly used tor cheap jewelry.

The invention consists in setting the stones between a peculiar arrangement of points that are raised on the die by the same operation by which the piece ot' gold or other metal which Jforms the setting is stamped.

The invention is illustrated in the accompanying drawing, in which- Figures l, 2, 3, 4, illustrate the method of setting in an open setting, that is most conimonly employed in the manufacture of jewelry. Figs. 5, G, 7, 8, and 9 illustrate my improved method.

Similar letters ot' reference indicate corresponding parts in the several igures.

In construct-ing the ordinary setting illustrated in Figs. l. 2, 4t, a flat metal blank A, of which Fig. l is a plan and Fig. 2, is a section, is stamped out of a sheet in suitable dies, said blank having raised veins a, a, which are to hold the stones when the metal 7J, 7), between all the said veins has been cut. away by drilling or otherwise and the blank has been brought to the form of a dome as shown in Fig. 3, or other torni required tor the set-ting. The stones c, c, are held in this sett-ing by the veins a, c., some of which present points e, e, to support the outer sides of the stones but all of those which come between the stones present continuous lines between the stones as shown in Fig. t. The stones are secured by burring the Veins a, a., and points e, e, and this barring makes the continuous portions of the veins overlap the edges ot' the stones to the extent of the greater portion of their circumference, thus covering many of the angles of the stone and by that means impairing its brilliancy.

In my method of setting, which prevents the brilliancy ot the stones being impaired by the continuous overlapping of the veins in the. manner above described, I make no difference in the construction of the blank or piece A, which is to constitute the setting except to raise points or vstuds z', i, at suitable parts ot' the veins a, a., as shown in Figs. 5 and G, the former of which figures is a plan and the latter a section. The production ot these pins or studs involves no change in the construction of the die by which the plate A, formed but the drilling of small holes therein at the places where the points or studs 2', z', are required. Theblank A thus formed with points is drilled or cut out between the veins and then bent or pressed into the proper form to receive the stones in the same manner as the blank first described. but the stones on being put into thin places are not put so deeply into or between the veins which are merely required to support them at the back, and they are then secured in their places by spreading the points or studs 2'., i', with suitable punches to make them lap over the edges of the stones at suitable places: thus with my improvement in the setting the edges of the stones are only covered here and there.

I do not claim generally the setting' ot' stones in or between points; but i That I claim as my invention and desire to secure by Letters Patent, is-

The raising of points or studs z', 2'.. on the veins of the bla nk by the same punching operation which forms the blank, thereby producing a superior setting which gives a greater brilliancy to the stones at a cost for labor not greater than that of the setting commonly used in cheap jewelry. Y

ISAAC LINDSLEY.

Wlitnesses HENRY MARTIN, ALBERT M. 'HEWITr