US955698A - Process of making hollow metallic balls. - Google Patents

Description

J. W.- SGHATZ,

PROCESS OF MAKING HOLLOW METALI IG BALLS.

APPLIOATION FILED MAY 25, 1909. 955,698. Patented Apr. 19, 1910.

v ina'irnn STATES PATENT curios.

JOHN SCI-IATZ, F CHAPPAQUA, NEW YORK, ASSIGNOR OF ONE-HALF TO HERMAN AHSCHATZ, OF GHAPPAQUA, NEW YORK.

Application filed May 25, 1909. Serial No. 498,351;

Specification of Letters Patent.

Patented Apr. 19, 1910.

To all whom it may concern:

blank shown in Fig. 4. Thereupon a closing it known that I, JonN \V. Soim'rz, a die is brought down upon the upwardly precitizen or theUnited' States,-aiid a resident sented edges 3, 3, .of the trimmed blank, of Chappaqua, county of lVestchester, State whereby they are upset inwardly as indi- 'of New York, have invented a new and userated by dotted lines 4, et, whereby the em fu l Method or Process of Making Hollow blank is caused to assume an elongated spher- Metall c Balls, of which the following is a ical shape there being also an irregularly v specificat on, reference being had to the acshaped hole 5, left in it because the edges of companylng drawings, in, which-- the metal have not quite met. 'lhereupon '10 I Figure 1 illustrates a plan view of the the blank, now in the shape of a somewhat a5 metallic disk or blank from which the ball elongated ball, is subjected to the action of i is made; Fig. 2 illustrates an edgewise View a reaming tool of suitable construction, of that which is shown in Fig. 1; Fig. 3 whereby the hole 5 is cut out smoothly to illustrates a sectional View of the blank at the desired size, as shown in Fig. (3. l' the' end of the first forming operation; Fig. A metallic plug, shown at (S in Fig. 7 7c 4: illustrates a sectionalview of the blank at which may be made of the same metal as the end of the second forming operation; that composing the blank, or of other metal Fig.5 illustrates a sectional view of the blank if preferred, and which has the desired after it has been'triinmed to dimension, sliowlength and is of such diamete as to fit the Lingthe third operation; Fig. 6 illustrates a hole 5 somewhat snugly, is then introduced 7 plan View of the blank after it has been given through the hole, occupying substantially the i the general form of a sphere, the hole therein position shown in Fig. 7, with its upper having been reamed out to dimension; Fig. edge resting in the lower part of the hole 5, I 7 illustrates a sectional view of the blank but before introducing the plug, I pass .25 taken. through-the center of the hole seen in through the hole into the interior of the ball Fig. (i and showing the reinforcing and holethe desired amount of some suitable solder- .closiiig plug and also the soldering and galing and galvanizing or metal-coating inag vanizing material. Fig. 8 illustrates that terial, 9, (see Figs. 7 and S) such as zinc,

I which is shown in Fig. 7, the final swaging spelter, or the like, together with a suitable 30 ;op eration having taken place and the galflux, such as borax. 'lhereupon the ball is vanizing material in place ready to be meltplaced between suitable swaging dies in such ed; Fig.0 illustrates a completed. ball; Fig. position that they will swage the ball into 10. illustrates a detail of special construction. more accurate spherical form and will also U My new method or pi'oce ss'is as follows forcibly impress the metal at the edges of 1 represents a disk of metal from which the the hole 5 upon and intothe shoulder 7, as

'j' ball is to be made and of the desired thickshown in Fig. 8, thus firmly and rigidly i'iess. It may be steel, brass, copper, alumiholding the plug in position. I sometimes num,orany other suitable metal. It is first make a slightly projecting point on the put upon a suitable forming die with which lower edge of the plug, as shown at 8, (see 0a half round punch or former cooperates, Fig. 8) which under the pressure of the l and is pressed into the shapeshown in Fig. swaging dies will be forced into the metal I It is then taken from that die and subof the ball against which the point rests, jected to the operation of another die and thus aiding in securely holding in posiplunger, by which it is given the form shown tion. This, however, will not ordinarily be in Fig. 4:; that is to say, its lower part is necessary, because the galvanizing about to llitltlc substantially semi-spherical and its be described will usually rigidly solder the sides are drawnupwardly into substantial plug in position. After these operat ons parallelism with each other. After this the have been perforinedthe ball is put into at upper edges of the. blank are out off to the suitable furnace and is heated so as to melt 50 size required for the subsequent operations, the galvanizing and soldering material, the leaving the blank iii the i'orm shown in Fig. ball being rotated while heated, so that its 5. It is then put upon a die, represented at entire interior surface, including the surface 2 in Fig. 5, which has a semi-spherical cavity of the plug, shall become thoroughly galin its uppersurface, coinciding with theseinivanized. 'lhei'eatter the heating may be 55 spherical shape and size of the bottom of the regulated so as to properly temper the ball,

45 are used as valves.

if it be made of such metal as will permitsuch result. Thereupon it ground or otherwise finished on its outer surl'ace in any of the usual ways.

In the manufacture of balls for certain uses, as for example when used ormunents on furniture, or otherwise, instead of inserting the plug as described, I sometimes thread the hole 5 after it has been duly reamed,

10 as shown in Fig. 10, so that the ball may be screwed upon a suitably threaded spindle forming part of the structure to be orna mented. Also a plug to close the hole may be threaded or riveted therein, without extending across the interior of the ball.

It will be obvious to those who are familiar with such matters that it will not in all cases be necessary to submit the metal to the number of forming or swaging operations described by me and in some instances it may be nece sary to submit them to more such operations; this will depend upon the size of the ball and the tl'iickness and charactor of the metal employed. It is also obvious that it will not be necessary in all cases that the plug 6 be provided with the shoulder 7 as shown. The plug may be of any preferred shape; its outer end may be merely beveled off or made in the form of a trunrated cone, or left in cylindrical shape. Also it will not always be necessary to galvanize the interior of the ball, but I much prefer so to do, in order that the plug may be nr re rigidly held in place, and all joints between it and the ball be sealed and also as a pre- Lservative against rust or corrosion.

' The invention secures a series of important advantages, among them the following: reduction in cost as (SOIl'iPtllQtl with solid 40 balls. The strength is increased, yet the thereof, and as a stay bolt it otherwise. applied, because the ends of the plug are rigidly connected at its ends to the interior sides of the ball.

Under my process I can make hollow balls in practically all sizes from. a diameter of a quarter of an inclror less, up to vseveral inches. Indeed theoretically the size may be anything desired, although as a. practical matter there axe limits within which the invention is useful. The halls are adapted G0 to a great variety of uses in various arts, such as anti-friction balls, casters, balls for valves, balls for ornaments, and many other uses.

I claim: :1. The method described consisting int pressing a disk of metal by successive forming operations into the general shape of a sphere having a hole in one side, introducing suitable soldering material into the interior of the sphere, inserting a plug in the hole and subjecting the article to the action of heat.

2. The method described consisting in dressing a disk of metal by successive forming operations into the general shape of a sphere having a hole in one side, introducing suitable soldering material into the interior of the sphere, inserting a plug in the hole, then additionally pressing the article into more accurate spherical sha and upon and about the plug and then subjecting the article to the action of heat.

3. The method described consisting in pressing a disk of metal by successive form ing operations into the general shape of a sphere having'a hole in one side. introducing suitable soldering material into the interior of the sphere, inserting a plug of such length as to extend across the interior of the sphere in the hole, then additionally pressing the article into more accurate spherical shape and upon and about the plug and then subjecting the article to the action of heat.

4. The method described consisting in pressing a disk of metal by successive forming operations into the general shape of a sphere having a hole in one side, reaming the hole to dimension, then introducing suitable soldering material into the sphere, then inserting a shouldered plug having sufficient length to reach across the interior of the sphere in the hole, then additionally pressing the article into more accurate spherical shape and upon and about the shoulder on the plug and then subjecting the article to the action of heat.

5. The method described consisting in pressing a disk of metal by successive forming operations into the form of a sphere having a hole in one side, then introducing suitable soldering material, then plugging the hole and then submitting the article to the action of heat.

6. The method described consisting in pressing metal by successive fori'ning operations into a general spherical form leaving a hole in one side, inserting a plug in the hole long enough to extend acmss the interior of the sphere and then additionally pressing the article into more accurate spherical Form and closing the hole over and upon the end of the plug.

In testimony whercot I have signed my name to this sperzifieation in the presence of two subscribing witnesses.

JOHN W. SCYIATY.

Witnesses? GEO. W. HAIun'r, J12,

A near Sorm'rz.

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