US1440802A - Method of making binding posts - Google Patents

Description

Patented dan, 2., 1923,

UNET@ OSCAR AUGUST SMITH,

OF CLEVELAND, 011110, ASSGNOR F ONE-HALF TO WILLIAM R. MITCHELL, 0F CLEVELAND, OHIO. j

METHOD OF MAKING BINDING POSTS.

Original application led August 2, 1919, Serial No. 314,884. Divided and this application led December 16, 1920. Serial No. 431,244.

To all whom t 'may concern:

Be it known that l, OSCAR A. SMrri-r, a

' citizen of the United States, residingat Cleveland, in the county of .Cuyahoga and State of Ohio, have invented certain new and useful improvementsl in Methods of Making Binding Posts, of which the following is a specification.

This application is a division of my copending, application for binding posts, Serial No. 314,884, filed Aug. 2, 1919, and relates to the method of making binding posts by means of which an electrical conductor or wire may be attached to one of the elements of a battery cell.

The object of the invention is the provision of an improved method of making binding posts, which can be readily and quickly attached to the carbon of a` battery by forcing the same into a hole drilled in the carbon without the breaking or splitting of the carbon, and which when in place will be eiiiciently and rigidly held against improper separation.

A further object of the invention is the provision of a simple method for quickly, efiiciently, and inexpensively producing this improved binding post.

In'the drawings accompanying and forli ing a part of this specification, Fig. 1 illustrates the stock cut to the proper length;

Fig. 2 illustrates one end thereof threaded;l

Fig. 3 shows the postwith a flange, in the present instance'in the form of a washer slipped over the smooth portion of the post and up against the threads which act as a shoulder; Figs. 4, 5, and 7 illustrate the several steps in the making of the post shown in Figs. 6 and 8 which latter figures illustrate the complete post with the project-ions in position to hold the binding post in the" carbon against rotation; and Fig. 9 is a` detail view of the washer which may be used. Similar characters of reference indicate corresponding part-s in the several )figures of the drawings.

In the binding post shown in the patent to E. C. Henn No. 813,093, Feb. so, i903 thev post is provided with a series of longitudi- "nally extending ribs disposed parallel with the axis of the shank and located in juxta position around the post, and as l had comy Siderable to do with the making of devices in accordance with this patent, great difficulty was experienced in fitting these binding posts into the carbon without splitting it as they were driven thereinto. Owing to the number of ribs in this Henn binding post considerable pressure was required to force 4and size as illustrated in Fig. 1 by a cutting off machine for the rolling of the thread. The rolling of this thread leaves a shoulder back of the thread, against which a punched washer can he located. The post is then .placed in a punch press provided with suitable dies by means of which one or more, usually two or three half circular ns or projections, are formed on the cylindrical portions of the post.

The dies shown in Fig. 4 comprise a pair of members 2 and 3, each having a semicircular recess therein, as 4, forming when the two members are brought together a cyn lindrical opening corresponding throughout'the major part of the length of the plain or smooth part of the stock to the diameter of the stock of the binding post. At the zones where the tins or projections are to be formed about 180o ofthis cylindrical opening corresponds to the diameter of the stock, while about 90o of each member is built out or that is inwardly so as to be of smaller .radius as partly shown by dotted lines a post shown in Fig. y8 the dieis provided with three of these projections and likewise .three mating recesses, two `at one side of the die members and `one at the opposite side in `alternation whereby two fins would be formed at one side oi' the stock and one at the other.

' In carrying out this improved method voi making these improved binding posts, the

,stock 7 after being rst suitably cut to the desired length is then l'rolled to have 4its thread 8 placed therein after which `a suit-- able punched 'washer 9 is placed on the post and then .the plain or smooth portion of the post is' placed between the die members, which are then brought together by a press to form the fins 1.0 or 10 and 11 according to the desired number oi. the fins that are .to be provided.

the die members 2 and. 3 are brought ,together each built out portion ri and projection 5 will torce a portion of the metal of the stock (see Figs. 5 and .6) int-o the recess 6 `and thus 'form a semi-circular lin. or projection as 1.0 or ll.

Owingifto `the shape of the recess 6 and projection 5 which ,of course may beot various shapes the fins l0 and l1 are shown seiiii-circular` in form and it will be observed that they are obtained by utilizing a portion of the metal of the stock which under pressure is caused to gradually flow, as it were into the recess 6.

In the -torni shown in Fig. .6 as hereinbefore stated two of the fins are locatedon one tangent of the stock, while in the form shown in Fig. 8 two off the fins are located on one tangent while an alternating fin is located on thc opposite tangent of the stock.

Either form has been found successful in practice and found to be sufficient to hold the in the carbon and to prevent the tur; offthebinding. post when placeiil in the carbon.

,F.urthermore, the formation of the binding post in the `manner' diescribecl Vpriwents the splitting of the Acarbon when the post is forced into the drilled hole thereof, especially since the tins are so located away from the end of the post which permits the latter j to project vquite a distance into the carbon beiore lthe fins are brouo'ht into eno'ao'ement Zt: o

With .Steh @ai-"19011, @ed @Specially bestes@ the mense Ot the lies islanda fat @aan las not `in :forcing the post into the carbon cause pressure on all parts of the carbon at the same time. v

Furthermore, the carbon is prevented from splittingdue to the tact that the tins or projections l() are so formed or shaped as to have substantial-ly a cutting edge. ln the present instance mechanism is shown by way of example, for carrying out my improved method, and a part ot the stoel; is ,thereby subjected to transverse pressure in such manneras to form a thin or cutting lin. Due to the brittle or fragile character of carbon, the tins must be sutliciently thin `or be for-med with a suiciently thin edge to permit the post to be forced into the carbon without any danger of the tins splitting or pulverizing it. Thus, each iin is Jformed with `substantially ,semicircular or curved .cutting ,edge l'or edge of such thin formation as to permit it to cut intothe carbon. 4 The forward por-tion .of this curved edge is thus shaped to such ,cutting thinness as to cut a path in advance of the body ofthe n, and since this forward edge curves or tapers rearwardly the .cutting action thereof on the carbon is gradual.

The projections 5 may be formed by suitable steel hardened..circular `pins rigidly secured in openings of ,the die whereby the pins are renewable and replaceable.

The various details may be more or less changedwijt-hout departing from the spirit i the metal outwardly, and `forming such.-

pietal into al vcurved cuttingv edge.

3. The method otmalring a binding post, which consists in forcing a portion of the metal outwardly, and 'forming a rearwardly tapering cutting edge thereon.

et. The method of making a binding post, which consists in forcing a portion ot the metal outwardly, and shaping the` same by pressure into a curved lin ol. cutting thinness. i

5. The method ojlf making a binding post, .which consistsin forcing a portion ci' the metal outwardly, and shaping the tor-ward portion of such metal into an edge oi1 cutting thin-ness.

6. The method ol making a bindingpost, which consists in vexerting `pressure on the post to project alternate portions of the metal outwardly at the4 sides thereof, and

shaping such projecting metal portions inte` edges of substantially` cutting thinness.

which consists in simultaneously exerting intervals at a eide of the post to form alined pressure on a plurality of sides of the post projections, and shaping such projections to project portions of metal outwardly, and into edges of substantially cutting thinness. l0 shaping such portions into projections of Si ned at Cleveland, county of Cuyahoga 5 substantially cutting thinness. and tate of Ohio, this 13th day of Decem- 8. The method of making a binding post, loer, 1920. Y which consists in exerting pressure at spaced OSCAR AUGUST SMITH.

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