Jewelry – Locket – Hinged cover
Patent
1993-04-27
1996-01-02
Milano, Michael J.
Jewelry
Locket
Hinged cover
291606, A44C 1500
Patent
active
054797985
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL SCOPE
The invention relates to a locket and a process for the manufacturing of locket-halves for decorative purposes.
STATE OF THE ART
From DE-GM 87 02 730 is known a locket consisting of two half-shells, for which the pre-manufactured locket half-shells and a flat annular frame are soldered to each other. This frame imparts to the locket half-shell the required rigidity and it is therefore thicker than the wall of the locket half-shells. In the case of lockets that are stamped with data on the precious metal content (fineness), relatively too much precious metal is used for the ring. Because the frame is essentially not visible due to being mainly inside the locket, this represents a waste of precious metal.
From GB-PS 825,076 is known a locket, of which the half-shells are manufactured by forming a locket half-shell from a first sheet, the forming of a flanged ring from a second sheet, the inserting of the flanged ring as frame into the locket half-shell and securing it therein by crimping the edge of the locket half-shell around the edge of the flange of the flanged ring. The disadvantage of this process is that also for the thus manufactured locket, relatively too much precious metal is used for the frames located on the inside and that the manufacture is costly. This is because the frames are joined strictly mechanically to the corresponding half-shell, namely by flanging the inside edge of the frame so that it can rest on the locket half-shell, and by crimping the edge of the locket half-shell so that it embraces and holds fast the outer edge of the frame.
DESCRIPTION OF THE INVENTION
The invention has the object to create a simple and cost-effective locket and a process for the manufacture of locket-halves.
According to the invention, this object is solved by a process for the manufacture of locket-halves by forming a locket half-shell from a first sheet, by stamping into a second sheet an annular groove, whose external diameter essentially corresponds to the external diameter of the locket half-shell, by removing the part of the sheet encompassed by the inner edge of the groove of the second sheet, so as to form a perforated sheet, by placing the half-shell with its rim into the groove, by soldering the rim of the half-shell to the perforated sheet, and by separating the part of the sheet that extends beyond the outer edge of the groove after the stamping in of the groove. According to the invention, the locket consists of two half-shells that are joined to each other in a hinged manner for its opening and closing, each half being reinforced by an annular frame soldered to the rim of the half-shells, this frames essentially presenting a U-section.
Further advantageous embodiments of the invention are object of the subclaims.
The manufacturing process, according to the invention, starts with a sheet out of precious metal or a precious metal alloy, especially out of gold, silver and their alloys. A locket half-shell is formed from a first sheet. An annular groove is stamped into a second sheet, the external diameter of the groove being essentially the same as that of the locket half-shell. The part of the sheet encompassed by the inner edge of the groove, raised in respect to the groove, is removed because it is not needed. In this way a perforated sheet is created. Subsequently, the locket half-shell is placed with its rim in the groove and soldered therein to the perforated sheet. The perforated sheet is particularly advantageously formed because the locket half-shell, whose diameter coincides with the external diameter of the groove, is correctly positioned and held fast in the groove for the soldering process. Special positioning or adjusting work is superfluous. The perforated sheet with its locket half-shell inserted in the groove can be automatically soldered in a furnace, in particular in a continuous furnace. For this, the groove serves not only for positioning and holding the locket half-shell in place, but also for filling it with solder, which can be inserted in the groov
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patent: 3140796 (1964-07-01), Broida
patent: 3618338 (1971-11-01), Sauer
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