Ornament and method of manufacturing the same

• US 4,943,326 A
• Filed: 10/20/1988
• Issued: 07/24/1990
• Est. Priority Date: 10/23/1987
• Status: Expired due to Fees

• Current Assignee: Furukawa Electric Company Limited, Yamaguchi Pearl Company Limited
• Original Assignee: Furukawa Electric Company Limited, Yamaguchi Pearl Company Limited
• Inventors: Yamaguchi, Isao, Ozawa, Kazuhiro, Nakajima, Etsuo
• Primary Examiner(s): Dean, R.
• Application Number:
  US07/260,030
• Time in Patent Office: 642 Days
• Field of Search: 148/402, 148/11.5 N, 148/11.5 R, 420/902
• US Class Current: 148/564
• CPC Class Codes: A44C 27/003 Metallic alloys alloys in general C22C
• CPC Class Codes: C08L 2201/12 Shape memory
• CPC Class Codes: C22F 1/006 Resulting in heat recoverable alloys with a memory effect
• CPC Class Codes: Y10S 420/902 Superplastic

Abstract

An ornament is disclosed, which is characterized in that a metallic alloy wire provided with a characteristic to show the superelastic effect at room temperature by making the metallic texture Austenite phase is overlapped on both ends and formed into an approximately circular ring shape to form a wound ring. A method of manufacturing the same claimed is that a prime wire of Ni--Ti type alloy is submitted to the cold processing rating from 20 to 50% to form a round or angular wire rod, said wire rod is wound up around a stick or pipe with a fixed outer diameter and submitted to the heat treatment at 300° to 600° C. under restraint of both ends of wire rod to form a wound ring of approximately circular ring shape and simultaneously the superelastic effect is given to said ring at room temperature by making the metallic texture thereof Austenite phase.

Claims

1. An ornament comprising:

a superelastic Austenite metallic alloy wire which has an Af point not higher than about 15°

C., said wire overlapping on the ends forming a wound ring.

2. The ornament of claim 1, wherein said superelastic metallic alloy wire is a Ni--Ti type alloy.

3. The ornament of claim 2 wherein pearls or other ornamental articles are attached to the wire.

4. The ornament of claim 2, wherein a surface treatment has been given to the ring.

5. A method of manufacturing the ornament of claim 1 comprising the steps:

submitting a prime wire of Ni--Ti type alloy to cold processing reduction from 20% to 50% thereby forming a round or angular wire rod;

winding said rod around a stick or pipe with a fixed outer diameter;

heat treating said wound wire rod at 300°

to 600°

C. until an Austenite phase is formed in sufficient amount to give said ornament superelastic behavior at room temperature.