A sterling silver chain and method of manufacturing a sterling silver chain comprising a plurality of chain links. Each of the chain links can comprise a sterling silver wire, the sterling silver wire comprising a first end and a second end. Each of the first end and the second end of each of the plurality of chain links can be joined together through a weld. Each of the plurality of chain links can comprise at least 92.5% by weight silver and at least 6.5% by weight tin.

An electrically assisted forming process and device for a high-strength metal alloy thin-walled pipe includes a die sleeve, wiring terminals, a pulse power supply, a die seat, sealing baffle plates, a drawing die, and a cooling water circulation chamber. A process for forming a high-strength metal alloy thin-walled pipe includes first, graphite or fusible metal, i.e., an aluminum rod, is introduced into a high-strength metal alloy pipe to be drawn to fill the whole pipe; and then, pulse current is introduced into a plastic deformation area of the thin-walled pipe. A cooling device can be provided to achieve a good cooling effect. The thin-walled pipe with corresponding length is cut according to a production requirement after processing is completed, and annealing treatment is performed in a vacuum heat treatment furnace.

Methods described herein can include drawing materials to form a drawn filled tubing (DFT) wire. The materials can include a core material, a first layer of a biocompatible material disposed exterior to the filler material, a magnetic material disposed external to the first layer of biocompatible material, and a second layer of biocompatible material disposed exterior to the magnetic material. In some embodiments, the method further comprises melting the core material to form a magnet with a through hole lumen. In some embodiments, the method can further include applying an external magnetic field to the materials during the drawing to align grains of the magnetic material. In some embodiments, the core material can have a melting point lower than a melting point of the magnetic material and the biocompatible material.

Implementations of an expandable link are provided. In some implementations, the expandable link comprises a first piece and a second piece moveably connected in an adjustable length configuration. In some implementations, a method of using the expandable link comprises adjusting the expandable link to increase or reduce the length of the expandable link. In some implementations, a method of using the expandable link comprises connecting one or more of the expandable links to form an adjustable portion of a piece of jewelry or to form a piece of adjustable jewelry.

A method of making tennis bracelets includes coupling together collet elements (2) in a repetitive series, wherein an L-shaped lateral appendage (3) of a collet element is inserted into a through hole (6) of an immediately adjacent collet element and then bent against a face (7) of the collet element to which it belongs. The collet elements are inserted according to the repetitive series into an assembly template (10) implemented as a self-supporting unit provided with fasteners (16) for fastening the unit to first and second carriage supports (22, 36) of first and second machines (18, 19), which cause the assembly template to translate under a die block (26) of a press device (24) of the first machine. The lateral appendages (3) of the collet elements are bent in succession under a laser welding head (38) of the second machine, for welding the appendages (3) to their respective collet elements.

A jewelry link assembly and a method of assembling jewelry chain links are disclosed. The jewelry link assembly comprises a male member comprising a ball portion having two prongs at opposite ends. The jewelry link assembly comprises a female member having two wings. Each wing comprises a prong receiving section. The ball portion is received between the two wings such that the prongs are made to slide into the prong receiving sections provided at the two wings for interlocking the male and female members. The jewelry link assembly further comprises chain links connected at far ends of the male and female members for forming a two-piece design configuration of the chain links together with the male and female members. The chain links, and the male and female members, are connected alternatively and successively to form a jewelry link assembly.

A flexible jewelry cable includes a plurality of helical links. Each link has a body that extends helically about a central axis of the link. Each link includes a protrusion extending from an inner surface of the body at or near ends of the body. Each protrusion defines a through hole that is coaxially aligned with the body. The body defines a female recess on the inner surface of the body, each recess corresponding to one protrusion. The recesses are at or near the ends of the body. One recess of a first one of the links is configured to receive one protrusion of a second one of the links and align the hole of the received protrusion with the hole of one protrusion of the first link. The cable includes a string extending through the aligned holes of the protrusions of the links.

A flexible jewelry cable includes a plurality of helical links. Each link has a body that extends helically about a central axis of the link. Each link includes a protrusion extending from an inner surface of the body at or near ends of the body. Each protrusion defines a through hole that is coaxially aligned with the body. The body defines a female recess on the inner surface of the body, each recess corresponding to one protrusion. The recesses are at or near the ends of the body. One recess of a first one of the links is configured to receive one protrusion of a second one of the links and align the hole of the received protrusion with the hole of one protrusion of the first link. The cable includes a string extending through the aligned holes of the protrusions of the links.

Implementations of an expandable link are provided. In some implementations, the expandable link comprises a first piece and a second piece moveably connected in an adjustable length configuration.

In some implementations, a method of using the expandable link comprises adjusting the expandable link to increase or reduce the length of the expandable link. In some implementations, a method of using the expandable link comprises connecting one or more of the expandable links to form an adjustable portion of a piece of jewelry or to form a piece of adjustable jewelry.

A jewelry link assembly and a method of assembling jewelry chain links are disclosed. The jewelry link assembly comprises a male member comprising a ball portion having two prongs at opposite ends. The jewelry link assembly comprises a female member having two wings. Each wing comprises a prong receiving section. The ball portion is received between the two wings such that the prongs are made to slide into the prong receiving sections provided at the two wings for interlocking the male and female members. The jewelry link assembly further comprises chain links connected at far ends of the male and female members for forming a two-piece design configuration of the chain links together with the male and female members. The chain links, and the male and female members, are connected alternatively and successively to form a jewelry link assembly.