US219595A - Improvement in modes of manufacturing the pendants of watches - Google Patents

Description

I T MUELLER Mode of Manufacturing the Pendants of Watches.

Patented Sept. 16,1879.

N.FEI'ERS, PNDTO-UTHOGRAPH UNITED STATES PATENT QFFICE THEODORE MUELLER, OF PHILADELPHIA, PENNSYLVANIA, AssrerNon T0 THOMAS B. HAGSTOZ AND oHAELES N. THORPE, or SAME PLAoE.

IMPROVEMENT IN MODES OF MANUFACTURING THE PENDANTS 0F WATCHES.

Specification forming part of Letters Patent No. 219,595, dated September 16, 1879 application filed November 20, 1878.

- and the letters of reference marked thereon,

which form a component part of this specification.

The object of this invention is to produce from ductile metal, especially plated metal,

without abrading or destroying or removing the precious metal covering and exposing the baser metal, a pendant'of great strength and durability at a very low cost for workmanship, without any undue waste of metal.

The nature of my invention may be con cisely stated to consist in forming a thimbleshaped cup from a flat disk of metal, especially platedmetal, with the plated side outward, by means of a punch and drawing-die, subsequently deepening and contracting such thimble in diameter by a further drawing operation, and afterward, by a swaging process between reciprocating dies, contracting the neck of the pendant and producing. the shoulders and collars thereon.

Figure 1 shows an end view of a flat blank; Fig. 2, the same blank in plan Fig. 3, the thimble as formed at the first drawing operation, in section Fig. 4, a section of the thimble after the second drawing operation Fig.

5, a vertical section of the first pair of closing die by means of a punch of corresponding form.

The cup or thimble A is, by the action of the punch and die, of proper form, forced or drawn into the shape marked A in Fig. 4.. The open mouth of the thimble A is contracted to the form shown in Fig. 5 by the (lies 0 and D, after which a rod or wire, B, bent, split, or flattened upon the end, is i11- scrted in the cup A as Shown in Fig. 6, and the cup, held upon the wire B, is placed between the reciprocating dies E and F, and rotated by means of the wire B, so that the cup shown in Fig. 5 (marked A assumes the form metal of the pendant is so compacted upon it that it becomes after this process firmly attached thereto.

After the pendant is fully formed its roughened inner edge is turned up smooth, and the rod is cut off, leaving only enough to pass into a hole drilled in the watch center to steady it and hold it more firmly while the pendant is being soldered thereto.

The form of the swaging-cavities of the dies E and F is not circular in section, but is widened out or relieved toward the edges marked G in Fig. 8, so that the surface of the metal is not abraded or removed by corners G of the swages or dies E and F, but is compressed and compacted centrally together, the non-abrasion of the surface when plated metal is used being absolutely essential to prevent the exposure of the baser metal, and the pendant shown at A in Fig. 7 is the resulting product.

I am aware that watch-pendants have been heretofore formed of sheet metal, stamped and swaged into the required shape; and I am also aware that mandrels have been inserted in them temporarily for the purpose of turning them under the swaging-dies during a portion of the shaping process.

Having described my invention, and the method of making the same, what I claim as my invention is-- The herein described process of forming to the watch-center and steady it and hold it watch-pendants from sheet metal by cutting more firmly while being soldered thereto, subthe blank or plavnohet, cupping it toward its stantially as described. base, contracting the open mouth, and finally swaging it under reciprocating sWaging-(lies MUELLER upon a metallic rod inserted in the open end, Witnesses: said rod becoming thereby firmly fixed to the HENRY PLEASANT, J r.,

.pendant, and serving to attach the pendent B. H. LOWRY.

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