US2369094A - Jewel oliving machine - Google Patents

Description

Feb. 6, 1945. WEAVER JEWEL OLIVING MACHINE Filed Oct. 1, 1942 2 Sheets-Sheet 1 FIG. i

INVENTOR. HARRY D. WEAVER BY 1945 H. D. WEAVER JEWEL OLIVING MACHINE Filed Oct. 1, 1942 2 Sheets-Sheet 2 IN V EN T 0R.

Illllllllllllllllllllll BYHA RRY 0. WEAVER FIG. 5

Patented Feb. 6, 1945 UNITED STATES, PATENT OFFICE 2,369,094 JEWEL omvnvo MACHINE Harry Dewey Weaver, Lancaster Township, Lancaster County, Pa., assignor to Hamilton Watch Company, Lancaster, Pa.

Application October 1, 1942, Serial No. 60,395

I 3 Claims.

This invention is directed to improvements in apparatus for oliving jewels such as used in the watchmaking industry. While the invention is mainly intended for that step in the processing of watch jewels known as oliving, it is capable of being utilized Wherever there is need of internal grinding, polishing, reaming or finishing of small parts either jewels or metallic.

The term oliving refers to the rounding of the internal edges of the bore of watch jewels to reduce the friction between the jewel and the shaft mounted therein.

the property of the diamond of splittingand always presenting a sharp edge makes this the only practical material to use. is of course important. The use of excessive amounts of this dust would materially increase the cost of production. An apparatus, therefore,

.which uses only a small amount of diamond dust and allows practically no waste is necessary. There is also the time element to be considered. In boring a jewel, which may be done by a battery of machines attended by a single operator each boring operation takes between eight and fifteen minutes, depending on the size of the jewel. I'he oliving which must have manual manipulation during the operation takes a proportional time. The oliving machine must therefore overcome the time element in order to be practical. As watches are of many sizes and each individual watch has different size jewels, this machine must also. be adjustable to accommodate many different sizes. The apparatus of the present invention is designed to meet and surmount these difiiculties which are present with machines now in use.

The object of this invention is to provide an apparatus which will rapidly and accurately olive the jewel.

A further object is to provide a jewel oliving apparatus which can be adjusted to different size jewels.

A further object is to provide a jewel oliving apparatus which is economical in use of cutting material.

A further object is to provide a jewel oliving apparatus which will perform the necessary operation in a minimum of time.

still further object is to .provide an apparatus which may be used in the enlarging, ream- The problem of costing, grinding or polishing of the bore of small parts.

The invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a side elevation of the oliving machine with a jewel shown with the wire but without the bow.

Fig. 2 is a top plan of the machine.

Fig. 3 is a front view of the bow with several jewels strung on the bow wire.

Fig. 4 is an end View partly in section showing the bow in oliving positions and with the dust carrying post removed.

Fig. 5 is a. section of the jewel before and after oliving.

The oliving apparatus-comprises a base I l upon which a stationary unit carrying the driving wheel and one driven wheel and a movable unit carrying the second driven wheel are mounted.

Standards I2 and I3 carry in appropriate bearings a drivin shaft l4 upon which is carried a centrally mounted driven wheel l5. This Wheel I5 is .formed of Lucite, hard rubber, hard leather or a like material having a fairly high coefficient of friction as its driving contact is frictional. Mounted also on shaft [4 and secured thereto by set screws (not shown) are pulleys l6 and I1, pulley 16 being smaller than H to give variation in speed if needed. The shaft is journaled in nylon high speed bearings l8 (Fig. 4) which have an oil feed through oil cups is mounted on bearing sleeves 20. These sleeves 28 set at their inner ends 2|, in recesses 22 to prevent the diamond dust from contacting the bearing. Guards 23 carried outwardly ou the ends of the sleeves also serve to prevent the entrance of the diamond dust to the shaft bearings. Set screws 24 permit easy removal and replacement of the bearings after wear has rendered them useless.

The shaft I4 is driven at a high rate of speed, upwards of 2200 revolutions per minute through either of the pulleys l5 or H by a-twisted raw hide belt 25 which is driven in turn by a motor .through a series of step up pulleys (which is not shown, being no part of the invention). While the mechanism for producing the high speed is no part of the invention, the resultant high speed is essential. It is this high speed that allows the jewel to be olived in from ten to thirty seconds. It is this rapid oliving that makes it practical to use such a machine in production work, as every jewel must be individually olived.

The standards [2 and I3 are formed with' extensions 26 which have journaled therein a shaft 21. Mounted on said shaft is a frame 28. This frame carries an upper shaft 29 upon which a yoke 30 having arms 3| is pivotally carried.

Projecting outward and at right angles to said 7 in for receivingthe jewel. A spring 38 tends to swing the arms 3| about the shaft '29 inward toward the central driving wheel which forces the wheel 35 against said driving wheel with sufiicient pressure to assure, transfer of rotation between said wheels.

A lower spring 39 engages the frame 28 and an anchor plate It!) secured to the base N. This forces the set screw 33 in the foot plate 32 securely "against the contact plate it! also on the base ll. Movement of, this set screw against the plate 41 swings the frame about the shaft 27 and .pro- -vides adjustment for different size jewels. A looking screw 42 is threaded into the foot piece and engages-the set screw 33 .to securely hold it and prevent the slightest movement in the adjustment.-

A sliding base 43 is mounted for sliding movement through an upstanding ridge 44 on base I1 and a slot 45 in said sliding base. A set screw 46 provides the adjustment of said base to align the jewel receiving wheels. Bolts 47 securely hold this base inadjusted position.

":Similar to frame 2-8 a frame .48 is *journaled .on a shaft 49 carried in upstanding ears 150 on :base 43. vA yoke .51 similar to yoke 3021s pivotally scar.- ried by shaft 51 journaled in :t-h 'u-pper :part of frame ll. This yoke hasarms53 which support a shaft 54 carrying a jewel receiving wheel :55

formed identical with jewel wheel 35. A spring .56 forces the jewel wheel fi l into contact with .central driving wheel :[5 while .a second lower spring v5'! urges th :frame :against the action of a set screw 5.8 similar in operation to set screw .33. This provides adjustment of the pair of jewel wheels to regulate the .distancethe one from the other while the upper springs insure .contact .of

said jewel wheels with the central driving wheel. These jewel wheels maybe swung upward and over to allow access to the central driving shaft and wheel [5 The hand tool or .bow'ss .on-which the jewels are held is shown in Fig. 3 with .a Single J wel carries 'a small-quantity of the o'living compound 68 of olive oil and diamond dust and has an up-: standing projection 269 formed with asharp edge lll used in-separating the -jewels strung on the wire.

The'-jewels illustrated in *Fig 15 showthe' prod- -uct before and after olivirig. Jewel "H is the finished jewel except 'for oliving and shows-the straight side E2 of the jewelibore. Jewelldwhich is the finished olived jewel shows fthe rounded -;side"l4 of the bore. "This oliving --process as .can ":be readilyseen reduces the contact of the The bow is formed of spring wire.

This post su ports on a level slightl friction; end bearin to tak re o thrust and t must "be done with every olived jewel.

wheel 35 has a peripheral groove 3'! formed theree shaft with the jewel bearing, thus reducing the It is, of course, necessary to use an In operation, assuming the belt to be driven and the central driving wheel turning at approximately 2200 R. P. M., the alignment of the sliding base and the adjustment of the'setscrews 33- and 58 tor the correct size to be made, the jewel li teiving wheels 35'and 55 are turning approximately 45003. P. M. The jewels to be olived, all

of the same size are strung on the wire which is, of course, withdrawn from the bolt for stringing andthe wire reinserted in the bolt after stringing, drawn taut against the spring action of the bow and secured. These jewels which may be of almost any number or only one are ready for oliving.

The operator, sitting directly i-n front- 0f the machine, in line with the jewel receiving wheels dip the wire at a central point into the paste formed of' diamond dust and oil. This wire Which is of soft copperretains the paste and a single jewel is slid along the wire by means of the projection edge l0,'the"jewels being too small to be separated by the fingers, to a point on the wire covered with paste. The jewel is then brought into contact with the jewel receiving wheels and in the peripheral grooves of these wheels, as shown in Figs. 1' and A.

The jewel is friction'ally'driven by the jewel receiving wheels at a high rate of speed, upwards I of 20,000 R.P. M. the bow being rocked a pre-- determined number of time's to round the sideof the bore insa-id jewel. This operation, because of the high speed, is completed ina few seconds varying from eight to thirty; depending on the size of the jewel. When it is considered that normally the oliving operation took from four to ten minutes. the practicability of this machine is demonstrated.

The use of olived jewels in a watch in replacement of the usual straight Jbore jewel reduces the friction and allowsfiner and more accurate adjustment Whichmeans closer timekeeping.

What I claim is:

' .1. .An apparatus 'for oliving jewels comprising a base, a motor driven wheel rotatively mounted on said base, a pair of driven wheels each'formed with a jewel retaining peripheral groove, a bow wire 'for axially supporting a number of jewels, said bow being manually positioned to bring suc- -cessive jewels into wheel-contacting position.

2. An apparatus for oliving jewels having a central bore comprising a base, a motor driven wheel 'rotatively mounted on said base, a pair of driven wheels, each formed with a jewe1 retaining peripheral groove, a bow, a "bow wire for axially supporting a number of jewels formed with center holes, said bow being manually operated to bring any of said jewels to wheel-contacting position and abrading'means applied to s am: wes a

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