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Publication numberUS2181257 A
Publication typeGrant
Publication dateNov 28, 1939
Filing dateNov 23, 1937
Priority dateNov 23, 1937
Publication numberUS 2181257 A, US 2181257A, US-A-2181257, US2181257 A, US2181257A
InventorsArbogast Alfred C
Original AssigneeNorthern Indiana Brass Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Core for producing pipe couplings by electrodeposition
US 2181257 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Nov. 28, 1939. 'A. c. ARBbGLAs'r CORE FOR PRODUCING PIPE COUPLINGS BY ELECTRODEPOSITION Filed NOV. 23, 1937 w m R 0 W M V W m M aim W M Patented Nov. 23, 1939 UNITED STATES:

-FAT NT oi-riciaz CORE FOR PRODUCING PIPE COUPLINGS BY ELECTRODEPOSITION Alfred C. Arbogast, .Elkhart, Ind., 'assignor to Northern Indiana Brass Company, Elkhart,


Application November 23, 1937, Serial No. 176,092 2 Claims. 204-6) This invention relates to improvements in cores for producing pipe couplings by electrodeposition.

The main objects of this invention are:

' First, to provide a novel and improved core for I use in producing hollow objects of irregular outline, more particularly elbow joint pipe couplings, by electrodeposition.

Second, to provide a core of the type described which is of multiple-part construction to facilim tate removal thereof from the finished article.

Y Third, to provide a 'core of the type described Objects relating todetails and economies of 20 the invention will appear from the description to follow. The invention is defined in the claims.

A structure embodying the features of the invention is illustrated inthe accompanying drawing, wherein:

95 Fig. 1 is a view illustrating the multiple-part core of the invention, the parts being in assembled operative relation. I

Fig. 2 is a view of the core in longitudinal section, more particularly illustrating the details thereof.

Fig. 3 is a view illustrating the manner of using the core in an electroplating bath.

Fig. 4 is a view illustrating the core partially disassembled in relation to a finished electrodeposited article which is shown in section.

Fig. 5 is a view partially broken away and in section illustrating the completed electroplated elbow fitting produced by the use of the core 0 -this invention. v

This invention relates to a core for use in producing hollow objects of irregular or curved out- 'line by electrodeposition. The core shown and described is particularly adapted for the production of elbow pipe fittings and has novel and improved provisions whereby it may be assembled and conveniently removed from such a finished article. However,.it will be apparent that the core is not unduly limited in its application and may be employed in producingcurved articles other than the elbow fittings referred to.

' Referring to the drawing, the reference numeral I indicates generally the core of the invention which consists ofa central segmental element 2 having an external curvature corresponding to the curvature of the elbow desired to be produced and extending over the major portion of the arc of the elbow. -On its inner side, the element 2 is under-cut or truncated at its ends to provide angularly converging faces 3, 4 and a 5 medial inner segment 5 corresponding in its internal curvature to the internal curvature of the fitting to be produced. The portion 5 serves as a' locating abutment for supplemental forming elements or sections, indicated by the reference 10 numerals 6, I. These latter sections are likewise in the form of truncated sections of an angular figure corresponding to the curvature of the segment}, the sections being provided with angular truncated faces 8, 9 and shoulders I0, I l respec- .tively complementary to and adapted-to abut the faces 3, 4 and the shoulders formed by the segment 5. In properly assembled position, the sections 8, 2, I form a completed segment of an annulus corresponding in shape to the shape of the finished article to be produced by electrodeposition.

In order to locate said sections in proper relative position, I provide alining pins l2, l3 on sections 6, I respectively adapted to be received in recesses in the element 2, such as are-indicated by the reference numeral l4, see Figs. 1 and 4.

Each section 6, I has a reduced externally threaded nipple i 5 bored and countersunk as indicated generally at iii to receive a screw i! for securing sections 6 and I to the element 2 so which is likewise drilled and threaded internally. On the nipples I5, I provide members l8, l9 which are externally shaped to form the enlarged female coupling ends or sockets of the finished fitting lill, said sockets being designated 20 in Figs. 3, 4 and '5. The said member-sin, l9 are drilled and threaded at 2la for threaded attachment to the nipples l5 respectively. J; I v

In assembled form, the core i appears as illustrated in Figs. 1 and 2. The membersiifl, 19 are 40 provided with recesses 22 to receivea spanner wrench or other similar tool andthey likewise are provided with threaded recesses 23 to 'receive a suspending member 24, see Fig. 3. The core is first assembled as shown in Figs. 1 and 2 and provided wtih a uniform coating of suitable conducting material such as graphite, the ends 25 of the members I8, I! being left' uncoated for obvious reasons. The core is then placed in an electroplating bath and a uniform coating of metal deposited thereon. I

When finished, the core and fitting produced by electrodeposition are removed from the bath and one or both of themembers l8, I! are rethe core can be withdrawn without further dis-' mantling the same, i. e., with one or both of the members I8, l9 detached. However, in the event that this is impossible due to the curvature being too sharp, I then unscrew one of the screws If! to release a section 5 or I as illustrated in Fig. 4. In the event that the removal of one of the sec tions is not suflicient to free the core from the inside of the fitting so that it may be withdrawn, the second section may be removed in a corresponding manner, after which it will be found that the central element 2 is readily displaceable from the fitting.

Cores in accordance with my invention may be provided for'the electroplating of nearly all types of elbows and obviously the shape and disposition of the faces 3, 4, 8 and 9 is capable of being varied greatly in accordance with particular circumstances. Likewise, the length of the small positioning segment 5 may be reduced or increased so as to.allow a greater or less rocking of the central element 2 in the fitting to remove the same. In an event, and without regard to the extent to which the core is to be dismantled to remove the same from the fitting, it will be found that the core produces a fitting which is very smooth externally and internally, the meeting faces of the various sections and elements of the core being capable of machining so as to provide a very smooth exterior for the core.

The recesses 22 facilitate unscrewing of the members l8, l9 by a spanner wrench and if desired the suspending member 24 may be utilized to withdraw the core members from the interior of the fitting.

From the foregoing, it will be apparent that I have provided .a core which is adaptable to producing a wide range of types and sizes of elbow joints and other hollow curved objects, regular or irregular and simple or complex in outline.

The core is inexpensive and readily manipulated and is characterized by the excellent results which are obtainable in the finished electrodeposited fitting.

I have illustrated and described my improvements in an embodiment which is very practical. I have not attempted to illustrate or describe other embodiments or adaptations as it is believed this disclosure will enable those skilled in the art to embody or adapt my improvements as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A core for producing electrodeposited elbow couplings, comprising an arcuate element having the surface thereof curved in conformity with the curvature of the elbow to be produced, said element being angularly truncated at opposite sides, a plurality of sections adapted to be associated with said element and having curved surfaces complementing the surface of the element when associated relative thereto, means engaging said element and sections for connecting the same and means for completing said core comprising a pair of end members threadedly engageable with said sections, said members and sections being removable to facilitate removal of the core from the finished coupling.

2. A core for producing electrodeposited elbow couplings, comprising an arcuate center element having the surface thereof curved in conformity with the curvature of the elbow to be produced,

said element being angularly truncated at opposite sides, a section adapted to be associated at each end of said element and having a curved surface complementing the surface of the element when associated relative thereto, and means foi completing said core comprising an end membe1 engageable with each of said sections, said center element and the member and section at one end of the element being removable from one end of the finished coupling.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3028630 *Apr 18, 1960Apr 10, 1962J A Walker & Co Pty LtdDie apparatus and method for moulding flexible tubes
US3051632 *Jul 27, 1959Aug 28, 1962William D KraemerMethod of electroplating copper elbows
US3752438 *Aug 20, 1971Aug 14, 1973Ameron IncOne piece elbow mold
US3974997 *Apr 1, 1974Aug 17, 1976Aeroplane & Motor Aluminium Castings LimitedCasting apparatus with three-part core
US4255237 *Jul 2, 1979Mar 10, 1981Kernforschungszentrum Karlsruhe Gesellschaft Mit Beschrankter HaftungMethod for producing a nozzle body by electroforming
US5160691 *Aug 26, 1991Nov 3, 1992Siemens Automotive L.P.Intake manifold/fuel rail method
US5350139 *Feb 25, 1993Sep 27, 1994Minnesota Mining And Manufacturing CompanyMandrel for making a rigid tubular article
US5433902 *Jun 15, 1994Jul 18, 1995Minnesota Mining And Manufacturing CompanyMethod of making a rigid tubular article
U.S. Classification204/281, 249/184, 205/73
International ClassificationC25D1/00, C25D1/02
Cooperative ClassificationC25D1/02
European ClassificationC25D1/02