US1307577A - chapman - Google Patents

Description

F. H. CHAPMAN. MACHINE FOR GROOVING AND FINISHING JEWEL BEARINGS.

APPLICATION FILI-ID OCT. I3, 19H- 1 ,307,577. 4 Patented June 24, 1919.

2 SHEETSSHEET I.

IIIIII ll lIlI/// Y Ev)?? 6212 3/71 212.

Guam wig UNITED STATES PATENT OFFICE.

FRANK H. CHAPMAN, 0F TOLEDO, OHIO, ASSIGNOB, TO TOLEDO SCALE COMPANY, OF TOLEDO, OHIO, A CORPORATION OF NEW JERSEY.

MACHINE FOR GROOVING AND FINISHING JEWEL-BEARINGS.

Specification of Letters Patent.

Patented June 24, 1919.

Application filed October 13, 1917. Serial No. 196,370.

To all whom it may concern: I

Be it known that I, FRANK H. CHAPMAN, a citizen of the United States, residing at Toledo, in the county of Lucas and State of Ohio, have invented certain new and useful Improvements in Machines for .Grooving and Finishing J ewel-Bearings, of which the following is a specification.

This invention relates to machines for cutting stone or like material of comparative hardness, and more particularly to machines for grooving and finishing jewel bearings such as agates and the like.

In certain of the mechanical arts, such as those relating to the development of scale, horological and scientific instrument industries, it has been found necessary to use pivots, bearings and the like of very hard material, such as agate and other precious or semi-precious stones. Heretofore it has been the custom to import such agatebearings, etc., in great quantities from foreign countries, where the labor employed in cutting these stones by successive hand operations did not greatly affect the cost thereof. The difiiculty experienced in providing a ma chine for cutting jewel bearings of this type bears mainly on the cooperation of a plurality of cutting members adapted to grind and groove the stone in straight lines and in sufficient numbers to allow the production of the agate bearings in considerable quantities. In grooving the agate bearings it is necessary to provide means for preventing the agate from tilting either in a vertical or transverse direction, thereby insuring that the groove becorrectly placed and alined. Otherwise the groove would be misplaced either obliquely, transversely or vertically, thus rendering the agate useless.

The primary object of my invention is to provide a machine whereby a number of agates or like bearings may be simultaneously grooved and polished in a minimum of time and at a relatively small cost. A further object is to provide means whereby the grooves are correctly placed and automatically maintained in such position.

A further object is to provide means whereby the 'agates may be adjustably mounted and dismantled quickly while allowing for automatic variation of position to adapt themselves to irregularities in the mounting of the cutting blades.

- With the above and other objects in view which will readily appear from the following description, my invention consists of the novel construction, combination and arrangement of parts more fully described in the following specification and set forth in the subjoined claims.

Referring to the drawings, which portray an illustrative form of my invention and wherein similar reference numerals designate similar parts throughout the several v1ews:

Figure 1 is a perspective view of my improved grooving and finishing machine with the parts in assembled position;

Fig. 2 is a detail perspective View of one of the agate holding blocks;

Fig. 3 is a bottom plan view thereof;

Fig. 4 is a side elevation thereof;

Fig. 5 is a vertical sectional view illustrating the manner of mounting the agate holding blocks; and

Fig. 6 is a detail vertical longitudinal section taken at right angles to the section shown in Fig. 5.

Referring to the drawings, the numeral 1 designates a portion of the bed of a planer or other suitable machine having a reciprocating carriage 2 adapted to reciprocate above a tank or containing vessel 3. As herein shown, the tank 3 is secured to the forward end of the planer bed and carries a plurality of V-shaped cutting and grooving blades l arranged parallel with each other and adapted to be immersed in an abrasive solution. It will be understood that the illustration in Fig. 1 shows the substantial 1 arrangement of parts but that during the operation of my machine the V-shaped cut ting blades are covered with the abrasive solution 5. This abrasive solution may be of any suitable composition. A mixture of carborundum and emery powder has been found to be very eflicient in practice, particularly when maintained in a slightly viscous fluid condition, and cooperating with V-shaped cutting members 4 of cast iron or soft steel.

Adjustably secured to the forward end of the reciprocating carriage 2 of the planer 1 is a carriage member 6 provided with a plurality of spring-pressed plunger rods 7 arranged in vertlcal alinement with each of the cutting members 4, the lower extremity of the plungers engaging suitable agate holding blocks 8 and adapted to hold them under pressure of the springs 9 upon the V- shaped cutting ribs 4. The upper end of the plunger rod 7 carries a knurled knob 10 which may be grasped to raise the lower end of the rods from the blocks 8 when desired. The lower ends of the plunger rods 7 are preferably formed with a semi-annular rib 11 adapted to seat in a rounded groove 12 centrally located in the upper side of the blocks 8, and preferably extending transversely across the blocks. The interfitting of the semi-annular rib 11 and groove 12 permits the blocks to turn to adjust themselves to the varied inclination of the cutting ribs 4 and to rest evenly thereon even though the cutting edges and the carriage be not absolutely parallel. The agate holding blocks 8 are each formed with a longitudinally-extending channel 18 in which the agates 14 are placed,v suitable clamping means, as set screws 15 or the like, secured in the side plates of the blocks being utilized to hold the agates laterally in position. Suitable stops, as the pins 16, are arranged a predetermined distance from the ends of the channels to enable the rapid placing of the agates within the channels and prevent their inward movement during the grooving operation. The construction and use of the set screws 15 and stops 16 are best seen in Fig. 3

of the drawings. It will be understood, however, that should it be desired to utilize agates of a smaller size than the channel 13 of the holding blocks, suitable spacing members may be provided between the walls of the blocks and the agates, which spacing members would be contacted by the set screws 15 or similar clamps.

A plurality of agitating rods 17 project downwardly from the carriage 6 between the holding blocks 8 and the cutting ribs 4 (see Fig. 6), and serve to continually agitate the abrasive solution to prevent the particles of carborundum, emery, etc., from settling to the bottom of the tank and thereby weakening the solution.

Any desired means may be used for posi tioning and maintaining the carriage 6 upon the reciprocating member 2 and for securing and positioning the tank 3 with reference thereto. A suitable drain, as shown at 18 in Fig. 1, may be provided to facilitate the removal of sediment or the abrasive solution, whenever desired.

In the operation of-my machine, a pair of agates, in which the grooves have first been roughly ground therein, are secured in the opposite ends of the holding blocks 8 and suitably secured therein by the stop and clamping members. The holding members are then positioned upon the cutting ribs 4 by the spring-pressed plungers 7 and the carriage 2 reciprocated. The two agates, one in each end of the block, prevent the block f om t rn ng relatively to the sa tting ribs,

while the pivotal connection between the plunger and block centrally of the block permits self adjustment to the varied inclination of the cutting edges. As the carriage 2 reciprocates, the grooves are accurately formed within the agates through the rubbing of the emery and carborundum particles between the cutting ribs and the agates, the solution being constantly agitated by means of the rods 17 While it will be apparent that the lllU-S":

trated embodiment of my invention herein disclosed is well calculated to adequately fulfil the objects primarily stated, it is to be understood that the invention is susceptible to variation, modification and change without departing from the spirit andscope of the invention as set forth in the subjoined claims.

Having described my invention, I claim:

1. A machine of the character described, comprising an abrasive solution container, a plurality of cutting members secured therein, a plurality of holders for I the articles to be cut, means for holding one of said holders upon each of said cutting members, and a pivotal connection between said last-named means and the holders whereby said holders are capable of self adjustment relatively to the cutting members.

2. A machine of the character described, comprising an abrasive solution container, a plurality of cutting members secured therein, a plurality of holders for the articles to be cut, each holder being arranged to contain a plurality of articles to be cut, means for pressing one of said holders upon each of said cutting members, and means for imparting reciprocatory movement to said holders.

3. Inamachine of the character described, a holder for articles to be cut comprising a channeled member adapted to receive a plurality of articles, and means for clamping said articles within the channel.

4. In a machine of the character de scribed, a holder for articles to be cut comprising a channeled member adapted to receive a plurality of articles adjacent its opposite ends, and adjusting means for clamping said articles within the channel.

5, A machine of the character described comprising an abrasive solution container, parallel cutting members secured within said container, a carriage capable of reciprocatory movement and provided With a plurality of holding members in vertical alinement with said cutting members, said holding members including a pair of pivoted members arranged to permit self adjustment of the holding members relatively to the cutting members.

6. A machine of the character described comprising an abrasive solution container, parallel c tting m mb r cur d Within a d container, a carriage capable of reciprocatory movement and provided with a plurality of plunger rods in vertical alinement With said cuttlng members, holders for the articles to be cut cooperating with said plunger rods, said holders and rods being pivotally connected to permit self adjustment of the holders relatively to the cutting members.

7. A machine of the character described comprising an abrasive solution container, parallel cutting members secured Within said container, a carriage capable of reciprocatory movement and provided With a plurality of spring-pressed plunger rods in vertical alinement with said cutting members, holders for the articles to be cut cooperatin with said plunger rods, said holders an rods being pivotally connected to permit self adjustment of the holders relatively to the cutting members.

8. A machine of the character described comprising a tank, an abrasive solution adapted to be contained therein, cutting members secured Within said tank and immersed in said solution, reciprocable means for holding a plurality of articles to be cut upon said cutting members, and means projecting from the holding means for agitating the solution during the cutting operation.

9. A machine of the character described comprising a tank, an abrasive solution contained therein, cutting members secured Within said tank and immersed in said solution, means for holding a plurality of articles to be out upon said holding members, and means for reciprocating said holding means for agitating said solution during the reciprocating movement.

10. A machine of the character described comprising a tank, an abrasive solution contained therein, a plurality of cutting members secured Within the tank and immersed in said solution, a plurality of holding members for the articles to be cut arranged to cooperate With said cutting members, a reciprocating carriage in Which the holding members are mounted, and agitating means secured to said carriage.

FRANK H. CHAPMAN.

Witnesses:

F. A. CROWLEY, Gnonen R. FRYE.

Oopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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