US1519040A - Stone-setting device - Google Patents

Description

Dec.f' 9; 1924 I. T. NEDLAND I STONE SETTING DEVICE Filed Jan. 19, 1924 INVENTOI? WITNESSES v fi/afl [Wed/and ATTORNEYS Patented Dec. 9, 1924.

, UNITED STATES IVAN T. NEDLAND, 0F HILL-$13030, NORTH DAKOTA.

STONE-SETTING DEE-VICE.

Application filed January 19, 1924.

To all whom it may concern:

Be it known that I, IVAN T. NEDLAND, a citizen of the United States, and a resident of I-Iillsboro, in the county of Traill and State of North Dakota, have invented a new and Improved Stone-Setting Device, of which the following is a full, clear, and exact description,

This invention relates to improvements in stone setting devices and has particular relation to the jewelers art, the device being adapted to secure precious stones and the like in the settings of rings.

An object of the invention is to provide a device of this character in which the pressure of the plunger is always and completely under the control of the operator so as to insure a rapid and effectual lockingof the stone in the setting but preclude possibility of injury to the stone due to the lack of control of the plunger.

A further object is to provide a stone setting device of the character stated which is adapted for bending prongs or upsetting metal of settings and which is capable of adjustment and effectual securing means whereby the operation is simplified and facilitated and rendered most effectual.

\Vith these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts which will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings Figure 1 is a view in side elevation of my improved device, partly in section, showing the same in operative position;

Figure 2 is a fragmentary view, partly in elevation and partly in section, showing the device in a somewhat different operation from that illustrated in Figure 1.

1 represents a frame which is preferably of relatively strong metal and which is provided at its lower end with a bifurcated portion 2 and a set screw 3 in one member thereof to clamp the frame to a table 4 or other suitable support. A cylindrical mandrel 5 is rigidly fixed to the frame 1 and parallel to this mandrel 5 the frame is formed with an arm 6 having an internally screw-threaded head 7 at its free end in which a screw 8 is mounted. This screw 8 is provided at its upper or outer end with a crossbar 9, or other gripping Serial No. 687,263.

device, to facilitate the turning of the screw, and the inner end of the screw is formed with a longitudinal recess 10 to accommodate a reversible plunger 11. This plunger 11 is made flat at one end and sharp atits other end, as clearly shown, for operation on different kinds of stone settings. The plunger 10 is made with any desired number of openings 12 to receive a spring finger I?) fixed to frame 1 and preferably having a coil 14 between its ends. This finger 13 permits the longitudinal movement of the plunger but prevents its turning action when the screw 8 is turned. 15 represents a carriage which is made with a sleeve 16 mounted to slide and to fit the mandrel 5, and a set screw 17 is provided in the sleeve 16 to clamp the mandrel and secure the carriage at any position of adjustment thereon. A resilient jaw 18 is fixed to the outer end of the carriage 15 and is adjustable by means of a set screw 19 to clamp a ring .20 against the .end of the carriage and hold the latter against accidental movement during the operation of the stone setting means.

In Figure 1 I illustrate the plunger as depressing a prong 21 of the ring 20 and it will readily be seen that by changing the position of the carriage 15 on the mandrel 5 each of the prongs 21 of the ring may be brought in succession under the plunger so that they can be bent downwardly to secure the stone 22. By reason of the construction above described it will be noted the desired pressure can be applied with great nicety to the prongs, as a partial turn of the screw 8 gives but a slight longitudinal movement to the plunger and this pressure is therefore always under perfect control so that there is no excuse whatever for injuring the stone in the bending of the prongs.

In securing stones 23 in settings 24, such as indicated in Figure 2, the plunger 11 is reversed so that its sharp or pointed end can be forced into the metal of the setting and press the inner wall of the setting over the stone, and by a plurality of such operations the stone can be effectually secured. This mode of operation is especially adapted for use in setting half pearls and the like and can be conveniently carried out without danger of injury to the stone.

Various slight changes and alterations might be made in the general form of the parts described without departing from my invention, and hence I do not limit myself to the precise details set forth but consider myself at liberty to make such slight changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. A stone setting device, comprising a frame, a mandrel on the frame, a screw mounted in the frame at an angle to the mandrel, a reversible plunger located in the end of the screw, and a spring finger connected to the plunger and holding the same against turning movement.

2. A stone setting device, comprising a frame, means on the frame to clamp the same to a support, a mandrel fixed to the frame, a ring clamping carriage, a sleeve on the carriage movable on the mandrel, a set screw in the sleeve engaging the mandrel, and a plunger on the frame at an angle to the mandrel.

3. A stone setting device, comprising a frame, a mandrel on the frame, a plunger on the frame at an angle to the mandrel, a carriage adjustable on the mandrel, a resilient jaw at one end of the carriage, and a set screw projected through the jaw and into the carriage to clamp a ring on the mandrel thereto.

4:. A stone setting device, comprising a frame, a ring receiving mandrel on the frame, a screw mounted in the frame atright angles to the mandrel and having a recess in its inner end, a plunger in said recess having a flat and a pointed end, a spring finger on the frame, and said plunger having an opening therein receiving the finger whereby the plunger is held against turning movement.

IVAN T. NEDLAND.

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