US2157789A

US2157789A - Jewel setting holder

Info

Publication number: US2157789A
Application number: US221463A
Authority: US
Inventors: Hudgens Waman Monroe; Mark C Hudgens
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-07-26
Filing date: 1938-07-26
Publication date: 1939-05-09
Anticipated expiration: 1956-05-09

Description

May 9, 19394 w. M. HUDGENS Er AL 2,157,789

JEWEL SETTING HOLDER Filed July 26, 1938 ATTO RN EYS Patented May 9, 1939 JEWEL SETTING HOLDER Application .luly 26, 1938, Serial No. 221,463

3 Claims.

This invention relates to a jewel setting holder and has for an object to provide a device for securely holding the disc-like setting of a friction jewel for watches and other precision instru- 5 ments while the same is being reamed to receive the jewel.

Hitherto difficulty has been experienced in holding the setting so that it would not become dislodged upwardly when the roaming tool was 10 withdrawn.

With this disadvantage in mind the present invention provides novel jaws for overlapping the top of the jewel and holding the same against dislodgement.

A further object is to provide a device of this character which will be formed of a few strong simple and durable parts, which will be inexpensive to manufacture and which will not easily get out of order.

With the above and other objects in view the invention consists of certain novel details of construction and combinations of parts hereinafter fully described and claimed, it being understood that various modifications may be resorted to within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the accompanying drawing forming part of this specification:

Figure 1 is a plan View of a jewel setting holder constructed in accordance with the invention.

Figure 2 is a longitudinal sectional View of the holder taken on the line 2 2 of Figure 1 and showing a jewel setting in dotted lines thereon.

Figure 3 is a fragmentary cross sectional view taken on the line 3 3 of Figure l.

Referring now to the drawing in which like characters of reference designate similar parts in the various views, Il designates a cylindrical body 40 having a stem II disposed axially on the bottom thereof. A cylindrical opening I2 extends axially through the stem and body and is threaded at the lower end toreceive a screw I3 for anchoring the device to the reaming machine.

A pair of brackets Ill are disposed upon diametrically opposite sides of the body, each comprising an upright arm I5, a horizontally disposed arm I6 at the bottom of the upright arm, and a downwardly extending arm I'I which .is 50 secured to the body in any preferred manner.

The upright arms I5 are provided with aligned openings to receive adjusting screws I8 which are disposed in alignment beyond the upper end face of the body I0. Each screw is provided 55 with a smooth reduced end I9 and stop collars 2l) are formed on opposite sides of the smooth portion.

The upper end face of the body I is provided with a groove 2i which extends all the way across the face between the set screws and is provided with an enlarged lower portion 22 which forms overhanging ledges 23. A pair of right angular jaws 24 are slidably mounted in the enlarged portion 22 of the groove and are held therein by the overhanging ledges 23, as best shown in Figure 3.

The upright leg of each jaw is provided with a smooth bore opening 25 which receives the smooth reduced end I9 of a respective set screw. The collars of the set screw engage the upright leg between them so that when the set screw is advanced or retracted the jaw will be advanced or retracted in the slot.

The jaws 24 are cut away to form substantially V-shaped working faces 26 which engage the periphery of the disc like jewel setting shown in dotted lines at 2l in Figure 2. These working faces are beveled to slope downwardly and rearwardly as shown by dotted lines at 28 in Figure 1 from the jewel setting so that the upper portions thereof extend over the jewel setting and hold the jewel setting against rising from between the jaws when the reaming tool is withdrawn.

In operation the jewel setting 2l to be reamed is placed upon the work supporting face of the body I between the jaws 24 and the set screws I8 are then adjusted to cause the jaws to grip the periphery of the jewel setting at diametrically opposite points. The reaming operation may now be performed with accuracy since the beveled surfaces of the working faces of the jaws hold the jewel setting stationary at all times during and after the reaming operation.

From thhe above description it is thought that the construction and operation of the invention will be fully understood without further explanation.

What is claimed is:

l. A jewel setting holder comprising a support having a work supporting face adapted to support a jewel setting to be reamed, jaws movable across the face toward and away from each other and having V-shaped opposed ends beveled downwardly for overlapping the edge of a jewel setting and clamping the same firmly to the work supporting face of the support.

2. A jewel setting holder comprising a support, means for securing the support to a reaming machine, the support having a transversely grooved hat working face, the groove having an enlarged grooves and having upstanding portions, the rst named portions of the jaws having V-shaped opposed working ends beveled downwardly to overlap and clamp a jewel setting to said working face at said bore, bracket arms rising from diametrically opposite points of said support, and adjusting screws threaded through said bracket arms and swivelly connected to said upright portions of the jaws for adjusting the jaws toward and away from each other.

WAMAN MONROE HUDGENS. MARK C. HUDGENS.