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Publication numberUS473139 A
Publication typeGrant
Publication dateApr 19, 1892
Filing dateJun 16, 1891
Publication numberUS 473139 A, US 473139A, US-A-473139, US473139 A, US473139A
InventorsHerman V. Bernhardt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Herman v
US 473139 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

' (No Model.) 7


-No.473',139. PatentdApr. 19,1892.

2210 in? E i ATTORNEY?" W|TN S 8: I Q9 INVENTORS I, H.V. Bernhardt. I



SPECIFICATION forming part of Letters Patent No. 473,139, dated April 19, 1892.

Application filed June 16, 1891.

T at whom it may concern:

Be it known that I, HERMAN V. BERNHARDT, of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Apparatus f0 rFormingRin gs, of which the following is a specification.

My invention relates to the manufacture of seamless rings, the main object of the invention being to produce an apparatus whereby by a single operation tubular blanks may be pressed to the desired form in cross-section; and to the end named it consists of certain novel constructions, arrangements, and combinations of elements to be hereinafter de- I 5 scribed, and specifically pointed out in the claims.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar reference-figures indicate :0 corresponding parts in all the views.

Figure 1 is a central sectional view of the apparatus which I prefer to employ in carrying out my improved method of forming rings, the parts being represented as they appear after the tubular blank has been adjusted to place, sections have been forced together. Fig. 2 is a similar view,the parts, however, being shown as they appear after the formation of the ring.

0 Fig. 3 is a side view of a lower mandrel-section of modified form, a portion of the lower die being shown in section. Fig. 4: is a similar View of another modification. Fig. 5 is a view of the seamless tube from which I prefer to cut my annular blanks. Figs. 6, 7, 8,

and 9 are views of the product of my apparatus.

In the drawings above referred to 20 and 20 represent the mandrel-sections, and the approachingends of these sections are each shaped to form one-half of the inner face of the ring, as is clearly shown at 5 5. The dies 11 14 are apertured to receive the mandrelsections, and by preference the several parts are shaped as shown in the drawings.

In formingaring a tubular blank 4is placed as represented in Fig. 1, and then by means of a proper press the die 14. and the mandrelsection 20 are forced downward upon said blank, the pressure being applied to the edges but before the dies and the mandrel- Serial No. 396,438. (No model.)

desired manner; butI prefer to cut them from a seamless tube, as 30. (See Fig. 5.)

If desired, the die-faces and the mandrelsections may be slightly cut away at points adjacent to the recesses 2, 2, 5, and 5, and then rings with double fins, such as shown in Figs. 8 and 9, may be produced.

In case the rings made as hereinbefore described are to be used as finger-rings they would ordinarily be subjected to the action of a rolling and sizing machinesuch, for instance, as the one described in Letters Patent of the United States No. 426,707.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- 7 5 1. The combination, with a pair of dies, of an independent or separate sectional arbor or mandrel, each of the dies being made with a section adapted to shape one-half of the outer surface of a ring and each of the mandrelsections being made with a section adapted to shape one-half of the inner surface of a ring, substantially as described.

2. The combination, with a pair of dies formed with recesses2 2, of mandrel-sections 8 5 formed with recesses 5 5", the dies and man drel-sections being separate, substantially as described.

3. The combination, with a pair of dies that are centrally apertured, of mandrel or arbor sections which fit within the die-apertures, the parts being shaped so that the mandrelsections bear upon the dies, whereby pressure applied to the mandrel-sections serves to press the dies together.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2939348 *Jun 2, 1955Jun 7, 1960Kelsey Hayes CoJoint construction together with means and apparatus for producing same
US3321947 *Sep 13, 1965May 30, 1967Hoke Mfg Company IncPipe coupling and method of making
US4307502 *Sep 22, 1980Dec 29, 1981Scola Vito AComposite ring and method of constructing the same
US6026572 *May 15, 1998Feb 22, 2000Tapia Accessory Group, Inc.Manufacture of a jewelry ring having inner lips at edges thereof and being elongated and shaped by a roller assembly to strengthen the same
US6553751Feb 8, 2001Apr 29, 2003Eitan WeinbergExterior shaped link and method
Cooperative ClassificationB21D53/44