US1496215A - Method of polishing ring jewels - Google Patents

Description

June 3 1924.

A. .GABUS METHOD 0F POLISHING RING JEWELS Filed March 1'7,v 1920 6 Sheets-Sheet l MUN@ w L June 3, 1924. 1,496,215

A. GABUS METHoDoF omsHING RING JEWELS Filed March 17. vw20 e sheets-sheet s `Fume: 3 1924.

A. GABUs MET-IOD OF .POLISHING RING JEWELS 6 Sheets-Sheet 6 Filed March 17. 192,0

Patented .lune 3, 1924.

ADRIAN GABUS, OF SPRINGFIELD, ILLINOIS.

METHOD OF POLISHING RING JEWELS.

' Application filed March 1'7, 1920. Serial No. 366,542.

To all whom 2725711647/ concern.'

Be it known that I, ADRIAN GABUS, acitizen of the Republic of Switzerland, and a resident of Springfield, in the county of Sangamon and StateV of Illinois, have invented a new and Improved Method of Polishing Ring Jewels, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to the polishing of ring jewels and it has for its object to provide an improved method of accomplishing that end. My improved method consists in threading the jewel or jewels upon a Hexible cord or wire carrying abrasive material and then revolving the cord or wire about an axis substantially coincident with that of the jewel, whereby the abrasive material carried by the cord is swept around the bore of the jewel. While it is preferable to accomplish the polishing by revolving the cord with the jewel meanwhile held so that it does not revolve, my invention, broadly considered, includes effecting the revolution of the cord b y movement of the jewel, or in any other suitable way and the generic claims hereinafter made should be soconstrued. As a further development, my improved method comprises relative longitudinal movement of the cord and j ewel-preferably by movement of the jewel longitudinally of the cord whereby the abrasive is rubbed againstthe jewel in a lateral as well as in a circumferential direction, and the abrasive on different r portions of the cord is utilized. My improved apparatus by which the said method may be practiced is illustrated in the drawings and is hereinafter described. `What I regard as new is set forth in the claims.

In the drawings,-

Fig. 1 is a front. view of my improved jewel polishing machine;

Fig. 2 is a perspective view of the machine shown in Fig. 1 as seen from the rear;

Fig. 3 is a longitudinal vertical section through my improved machine as seen from the front; Y,

Fig. 4 is a transverse vertical section taken substantially on line 4-4 of Fig. 1;

Fig. 5 is a transverse vertical section taken substantially on line 5 5 of Fig. 3;

Fig. 6 is a vertical section taken substantially on line G-Gof Fig.k 1;

Fior 7 is a vertical section taken on line ifa-7 of Fig, 4;

Fig. 8 is a horizontal cross-section taken on line 8 8 of Fig. 1;

; Fig. 9 is a top view. of my improved machine;

Fig. 10 is a horizontal cross-section taken on line 10-10 of Fig. 1;

Fig. 11 is a horizontal cross-section taken on line 11-11 of Fig. 3;

Fig. 12 is a perspective view of one of the heads by which the flexible polishing member is rotated and given a whirling moverment Fig. 13 is a cross-section through a ring jewel prior to the polishing operation; and

Fig. 14 is a cross-section throughv ai polished ring jewel.

Referring to the several figures of the drawings-20 indicates a bench of any appropriate type upon which thecast frame 21 of my machine is secured in any suitable manner. Extending longitudinally of the frame 21 is a bar 22 which for the greater part of its length is squared in cross-section. As is clearly shown in Fig. 3, one end of the bar 22 has slidably mounted upon it a bracket 23. A nut 24 mounted by means of screw threads upon the end portion of the bar 22 is available for adjusting the bracket 23 for regulating the tension of the flexible polishing member as hereinafter described, and giving the hole in the jewel-the desired shape from approximately a cylindrical holev to one of very pronounced olive shape. A rod 25 fixed in the lower end of the bracket 23 passes through a suitable socket in the frame 21 for holding the bracket 23 against rotary movement upon the bar22, while at the same time permitting movement of the bracket longitudinally of the bar. The inner endof the rod 25 bears against one end of a coiled spring-26, the other end of which rests against av block 27 which in turn is in contact with a suitable portion of the frame 21. The spring 26 holds the bracket 23 yieldingly at the limit of its motion to the left in Fig. 3 against the nut 24 in whatever adjusted position said nut may be placed. A tube 28 encloses-the spring 26, as is shown in Fig. 3.V

A bracket 29 formed integrally with the frame 21 `stands directly opposite the bracket 28 above the bar 22. As is best shown in Fig. 7, a short shaft 30` is revolubly mounted in the upper end of-each of the brackets 23 and v29, each of said.. shafts havards rising trom the-bench 20.

ing lixedly mounted thereon a sheave 31. Each ot the shafts is provided at its inner end with a suitable socket adapted to receive a tapered spindle 32 so as to cause the spindle to rotate with the shaft as it is driven by the she-ave 31. Each ot the spindles 32 carries at its end a head 33 which in tue construction shown comprises two disks or plates spaced a short distance apart.

The'sheaves 31 are adapted to be driven in unison by a belt 34 (see Fig. 2) which passes about the sheaves 31 and about a plurality ot horizontally-disposed sheaves which are revolubly mounted upon stand- K Suitable springs 37 are provided upon the standards '36 'for permitting vertical movement ot the sheaves as may be required for proper driving. The sheaves 35'at the end ol the machine opposite the bracket 23 are located at some little distance trom the sheave 31, whereby the belt 34 is adapted towork prop- Aerly upon the sheave 31 in any of its adjusted positions within the limited adjustment of the bracket 23. as illustrated in Fig. 3 and as above described. Vertically-disposed sheaves 38 are provided for directing the belt 34 upwardly. as is shown in Fig. 2.

rto any suitable source of power. the sheaves 38 being mounted upon standards 39 rising `from the bench 20. f

For holding the jewel tor the polishing operation in the desired position between the heads 33, I Ihave provided a head slidably n'iounted upon the square bar 22. as is best shown in Fig. 6. As shown in that ligure, the head 40 is made of two parts so asto be readily applied in position upon the bar. At the upper end, the head 40 is provided with fixed jaw 41 and a pivotally mounted jaw 42 which is normally held in closed position with respect to the jaw 41 by means ot a spring 43. As will be readily understood. by suitable pressure upon the lower end portion ot the jaw 42 this jaw can be swung against the action of the spring 43 away from the jaw 41 so as to permit the insertion ot a jewel between the jaws. lNhen the jaw 42 released. the spring 43 applies the requisite pressure tor insuring that the jewel shall be held in the'desired position. Shields 44 extend from opposite sides ot the head 40 en'ibracing the bar 22 ltor protecting the bar trom the action of any polishing powder rwhich might be released Vfrom the flexible polishing member by its trictional Contact with the jewel.

For reciprocating` the head 4() and the jewelicarried thereby between they rotating heads 33. I have provided a cam. operative connect-ions between the cam'and the head 40, and suitable means. independent of the means by which the belt 34' is driven. for driving the` cam. Thisfmechanism comprises a sheave 45 rotatably mounted upon the trame 21 by means of' a short shaft 46 (see Fig. 11). A heart cam 47 is fixed upon the sheave 45 so as to rotate therewith within a housing 48 provided by the framework 21. A wiper roller 49 is jonrnalled in one end of the link 50 adjacent to the cam 47, the other end of the link 5t) being pivotally connected to a lever 51 (see Figs. 3 and 5) which is pivotally mounted upon the 'trame 21 by means of a rock shatt 52, as is best shown in said Fig. 5, the lever 51 being held against rotation with respect to the shaft 52. The upper end ot the lever 51 is pivotally connected with the head 40 by means ot a link 53. As will be understood by an inspection of Fig. 3, when the sheave 45 and the cam 47 are rotated the link 50 will be moved toward the letty in Fig. 3 by reason ot the engagement of the wiper roller 49 with the cam. This movement of the link 50 serves to swing the lever 51 toward the lett about the rock shaft 52, causing the head 40 to be moved also toward the lett along the bar 22. lVhen the high part ofthe cam 47 has passed the wiper roller49 so as tov permit the link 50 and the lever 51 to move toward the right in said Fig. 3, such movement is ellected by means of a counterweight 54 which is connected to the lever 51 by means ot a flexible member 55 ot any suit- 'if able type which passes over a suitable idler 56 as shown in Fig. 2. The link 50 is supported between its end portions by means of avplate 57.bridging between suitable lugs formed on the frame 21, as is best shown in Fig. 2. By the use of a heart cam tor actuating the lever 51. the head 40 and the jewel carried thereby are given a substantially uniform movement first in the one direction and then in the other and this uniform movement is much desired in preference to the constantly changing rate of movement such as characterizes a` crank motion.

The means tor driving` the sheave 45 comprises an endless belt 58 connecting the sheave 45 with a sheave 59revolubl'v mounted upon a shait G0 which is journalled in suitable bearings below the bench 20. The shatt (i0 is driven by means ot a sheave G1 connected by means ot a belt G2 with the driving pulley 63 ot an electric motor 64 mounted upon a base G5 supported trom the bench 20. Connection between the sheaves 59 and (il is eftected as desired by means ot a clutch member 66 Yfeathered upon the shaft (i0 adjacent' to the sheave 59 which is provided with suitable lugs or teeth adapted to cooperate with the clutch member 66 tor causingT the clutch member and the sheave to rotate together. The clutch member G3 is normally held in engagement `with the sheave 59 by means of a` spring 67 see Fig. 10). The clutch member disadapted to be moved out ot engagement with the sheave 59 by means of a bell-crank lever 68 one aim of whichis in the form of a yoke (see Fig. 1) engaging a suitable groove 69 in the clutch member 66. .The other arm of the bell-crank is also forked, as shown Vin Fig. 10, for embracing the lower end of a lever 70. The upper end of the lever is disposed opposite the outer end of a slide rod 71 extending horizontally through the frame 21, as is best shown in Fig. 8. As will be appreciated, upon a movement of the rod 7l toward the right in Fig. 1, the lever 70 is moved in clockwise direction in said figure, serving to turn the bell-crank lever 68 in counter-clockwise direction, as seen in Fig. 10, moving the clutch member 66. out

kof engagement with the sheave 59 for stopping the rotation of the shea-ve 59, the sheave 45, and the cam 47.

In the use of my improved apparatus, a

jewel 72 as shown'on an-enlarged scale in` tity of polishing material, such as diamond dust, for example. The end portions of the flexible polishing member 73 are then secured tothe rotary heads 33 with some little slack in the flexible member. If desired, a number of jewels 72 may be threaded upon .the flexible member 73 for expediting the operation of the machine. In that case the surplus jewels which havenot been polished are held between the plates of thehead 33 at one end of the machine during the polishing of the jewel being operated upon. When the polishing of one jewel has been completed, that jewel is shifted into position between the plates of the head 33 at the opposite endof the machine and one of the jewels heldin reserve is then operated upon. For effecting this result,'the bearings of the flexible member 73 in the heads 33 are in the form of slots 74 open at their outer ends, as is shown in Fig. 12.

lVith one or more jewels 72 threaded upon the polishing member 73, and with the ends of the polishing membersecured to the. heads 33 eccentrically thereof with respect to the axis of rotation ofv said heads, the belt 34 is thrown into operation forrotatingthe heads 33 in the same direction and at the same speed. The-rotary movement ofthe endA portions of the flexible polishing meinber causes the cord to bow outwardly byr centrifugal force and to swing about the axis of the heads 33, the portions. of the flexible member at opposite sides of the jewel mounted in the head 40 being adapted to whirl separately. By reason of the whirling motion ofthe flexible member with respect to the jewel, `the flexible member is placed under tension and is caused to sweep eccentrieally about the axis of the jewel and to press against the inner face of the bore thereof at a constantly 'changing point circuinferentially of the iing. The heads 33 are designed to be driven at a very high rate of speed whereby the llexiblemember is given a very rapid whirling and rotary movement aboutthe axis of the ring jewel. At the same time, the means for reciprocating the jewel longitudinally of the flexible member-7 3 will have been in operation, in-

creasing very materially the fiictional effect of the polishing member upon the inner face of the jewel. rlhe movement of the head 40 with the jewel 72 is comparatively slow, being designed merely to keep the jewel and the flexible polishing member in motion with respect to each other longitudinally of the flexible member. After the completion of a polishing operationY of this type, the jewel will be found to have assumed the shape illustrated in Fig. 14, in vwhich the bore is very smooth and regular. i e

Means is provided for automatically stopping tlie relative movement of the jewel and thel exible polishing member 73 longitudinally of the flexible member at the end of a predetermined desired number of such longitudinal movements, means being also provided for varying the number of such longitudinal movements before the automatic stoppage of the movement. This automatically-acting means comprises a member slidably mounted upon the slide-rod 71 and adapted to be moved step by step into contact with a cooperating member adjustably mounted on the rod for moving the rod to- `ward the rightl in Fig. 1 for throwing the Y bar 77 (see Fig. 3). Asis best shown in Fig. 5,

the rock sha-ft 52, upon which the lever 51 is Vfixedly mounted and about the axis of which the lever swings, is provided with 'a head 7 S to which a pawl 79 is pivotally connected in j eccentric position with respectl to the axis of the shaft. As is shown in Fig. 3, the pawl 79 is yieldingly Asupported by means of a spring 8() so as to engage one of the teeth of the rack bar 77. As will be readily understood, when the lever 51 is swung back and forth and rocks the shaft 52. the pawl 79 will be ieciproeated longitudinally by reason of its eccentric connection with the head 78. VThe arrangement is such that upon each movement of the lever 51 and of the pawl 79 toward'the right in Fig. 3 the rack bar` 77 will be moved toward the right. A pawl 81 lixedly mounted upon rock shaft 82 is also yieldingly held by a spring 83 in engagement withthe rack bar 77. for preventing a movement of the rack bar 77 toward the left when the pawl 7 9 is retracted. The

rack bar is thus given a step by step movement toward the right at successive strokes of the lever 51, serving eventually to move the rod 71 also toward the right as hereinafter described.

When it is desired to move the rack bar 77 again toward the left, this result is effected lthrough the medium of a pin 84E carried by the rack bar and extending through a slot 85. The rock shaft 82 is provided with handle 86 upon one end, by a movement of which in counterclockwise direction in Fig. 1 the pawl 81 carried by the rock shaft is moved downward out of engagement with the rack bar 77 The end of the pawl 81 is in the form of a fork which embraces the pawl 79 above a lug 87 projecting from its end, as is seen by an inspection of Fig. 8, whereby the pawl 79 is also carried downward ,out of engagement with the rack bar 77, which is then free to be moved toward the left.

In the construction shown, the adjustable stop device, by contactv with which the rack bar 77 is adapted to move the slide rod 71 toward the right for throwing the driving clutch out of operation at the desired moment, is in the form of a collar 88 secured by means of screw threads upon the slide rod. A lug 89 extending from one side of the collar 88 engages a slot 90 in the framework so as to permit the collar to move longitudinally of the rod 71 but to hold the collar from rotation with respect thereto. The position of the collar 88 upon the rod 71, is adjusted by rota-ting the rod 71 through the medium of a thumb piece 91 upon the outer end of the rod. By the adjust-ment of the stop device 88 longitudinally of the rod 71, the number of actuations of the rack bar 77 in its step by step movement through the medium of the pawl 79 before the sleeve 76 is brought into contact with the collar 88 can be varied within a wide range.

The movement of the slide rod 71 to the right for throwing the driving clutch out of operation is effected against the action of a coiled spring. To this end, the slide rod 71 has fixedly mounted thereon a sleeve or collar 92. A pin 93 slidably mounted in a suitable opening in the frame 21 adjacent to the Slide rod 71 is provided with a yoke 94: fixedly mounted thereon and held in contact with the collar 92 through the medium of a coiled spring 95 connected at one end to the pin 93 and at its opposite end to the fra-me 21 at the opposite end of the machine. After the sleeve 76 is brought into Contact with the collar 88 in the step by step movement of the sleeve 76 and the rack bar 77, the' further movement of the sleeve 7 6 toward ,the right in Fig. 8 carries' the collar 88 and the rod 71 also toward the right in said figure against `the action of the spring 95, ybringing the l end of the rod into contact with .the lever 70 tion with respect toY theV Aother and v giving `(see Fig. 1) and eventually causing the clutch member 66 to move out of engagement with the sheave 59, whereupon the rotation of the cam 47 and the reciprocation of the head l0 along the bar 22 are stopped.

My improved machine is also adapted for use for polishing jewels by a slightly different method. I have found that by threading a number of ewels on a polishing cord, holding such jewels inspaced relation between the heads 33, as by means of additional jaws upon the head 40, and drawing the cord tight between the rotary heads, a number of jewels can be polished at the same time, this method giving a finished jewel with a straight hole such asis desired inv some instances. My broader claims are of cours@ to be construed to cover this procedure as well as that first described.

So far as I am aware, I am the first in the art to provide for polishing a ring jewel by the use of a flexible polishing member upon which the jewel is threaded, and sweeping the polishing member around the bore of the jewel by a relative revolving movement of the jewel and polishing member with respect to each other; also to accompany such revolving movement with a relative longitudinal movement. I also believe myself to be the first to provide an apparatus operating in the manner described. The generic claims hereinafter made are therefore to be construed accordingly. Furthermore, while my improved method is primarily intended for polishing ring jewels it may also be used for polishing other articles in which similar conditions obtain, and theV claims are, therefore, to be construed accordingly.

What I claim as my invention and desire to secure by Letters Patent, is-

1. The method of polishing a ring jewel which comprises threading` the jewel upon a flexible polishing member, and then giving one of the stated parts relative revoluble movement with respect to the other for providing the desired frictional. engagement.

2. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member and then giving one of the stated parts relative rotary and revoluble movement with respect to the other.

3. The method of polishing a ring jewel which comprises threading the jewel upon a flexible Apolishing member and then giving one of the `stated parts relative revoluble and longitudinal movement with respect to the other. Y Y

4l. Thepmethod 'ofpolishing a ring jewel `which*comprisesthreading the jewel upon a flexible polishing member', and then giving one of the stated parts relative rotary mothe flexible member a whirling movement with respect to thek jewel.

5. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member supported in a slack condition and then rotating the exible member in the bore of the jewel.

G. The method of polishing a ring. jewel which comprises threading the jewel upon a flexible polishing` member, and then giving one of the stated parts relative rotary and revoluble motion with respect to the other and a relative movement longitudinally7 of the flexible member.

7. The method of polishing a ring jewel which comprises threading the' jewel upon a flexible polishing member, and then giving the flexible member a whirling movement with respect to the jewel and giving one of the stated parts a relative movement with respect to the other longitudinally of the flexible member.

8. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then giving one of the stated parts a relative rotary motion and a relative movement longitudinally of the flexible member, and giving the flexible member a whirling movement with respect to the jewel.

9. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then relatively moving one of the stated parts with respect to the other part for causing the flexible member `to sweep about the bore of the jewel eccentrically with reference to the axis thereof.

10. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then moving one of the stated parts with respect to the other for causing the flexible member to move progressively about the inner face of the jewel eccentrically with reference to the axis thereof, and at a constantly changing angle with respect thereto.

11. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then giving said flexible member a progressive movement about the inner face of the ring jewel at a constantly changing angle with respect thereto, and giving one of the stated parts at the same time a rotary movement with respect to the other.

12. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then giving said flexible member a progressive movement about the inner face of the ring jewel at a constantly changing angle with respect thereto, and giving one of the stated parts at the same time a relative movement longitudinally of the flexible member.

13. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then giving said flexible member a progressive movement about the inner face of the ring jewel at a constantly changing angle with respect thereto, and giving one of the stated parts at the same time a relative rotary motion and a relative movement longitudinally of the flexible member.

14. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then whirling the flexible member by centrifugal force about the jewel.

15. The method of polishing a ring jewe which comprises threading the jewel upon a flexible polishing member, and then whirling the flexible member by centrifugal force about the jewel and at the same time rotating the flexible member with respect to the jewel.

16. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then whirling the flexible member by centrifugal force about the jewel and at the same time moving the jewel longitudinally of the flexible member.

17. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then whirling the flexible member by centrifugal force about the jewel and at the same time rotating the flexible member and moving the jewel longitudinally thereof.

18. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then revolving the end portions of the flexible member about the axis of the ring jewel and rotating the flexible member for causing it to whirl by centrifugal force about the jewel.

19. The method of polishing a ring jewel which comprises threading the jewel upon a flexible polishing member, and then revolving the end portions of the flexible member about the axis of the ringfjewel and rotating the flexible member for causing it to whirl by centrifugal force about the jewel, and at the same time moving said jewel longitudinally of the flexible member.

ADRIAN GABUS.

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