Heat resistant, non-conductive threaded support guide for use in failure testing and failure testing method using same

Patent metadata

Field	Value
Publication number	US-10488435-B2
Application number	US-201715728528-A
Country	US
Kind code	B2
Filing date	Oct 10, 2017
Priority date	Oct 10, 2017
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A support guide is provided for supporting a delicate heating wire in a failure test. The support guide includes a body formed of a heat resistant, non-conductive material. The body has a threaded surface configured to receive and support the delicate heating wire in a coiled form. Also provided is a failure testing method using the heat resistant, non-conductive threaded support guide.

First claim

What is claimed is:

1. A support guide for supporting a heating wire in a failure test, the support guide comprising:
a body formed of a heat resistant, non-conductive material;
wherein the body comprises a threaded surface configured to receive and support the heating wire in a coiled form.

2. The support guide of claim 1 , wherein the body comprises an elongated member having the threaded surface.

3. The support guide of claim 1 , wherein the body comprises a rod having the threaded surface.

4. The support guide of claim 3 , wherein the threaded surface of the rod comprises a thread having a pitch, a minor diameter, and a major diameter for supporting a coil of the heating wire while under failure test.

5. The support guide of claim 1 , wherein the heat resistant, non-conductive material comprises ceramic.

6. The support guide of claim 5 , wherein the ceramic comprises YZ zirconia.

7. The support guide of claim 1 , wherein the heating wire comprises a Nichrome wire.

8. The support guide of claim 7 , wherein the Nichrome wire comprises 80% nickel, 20% chrome, and is 22 American Wire Gauge (AWG) in diameter.

9. The support guide of claim 1 , wherein the threaded surface comprises a thread having a TPI (threads per inch) of 8.

10. The support guide of claim 1 , wherein the threaded surface comprises a thread having a pitch, a minor diameter, and a major diameter for supporting a coil of the heating wire while under failure test.

11. The support guide of claim 10 , wherein the pitch is 60 degrees, the minor diameter is 0.09 inches, and the major diameter is 0.15 inches.

12. A failure testing method for testing a device under test (DUT), the method comprising:
providing a support guide for supporting a heating wire, the support guide including a body formed of a heat resistant, non-conductive material, and the body having a threaded surface configured to receive and support the heating wire in a coiled form;
coiling the heating wire on the threaded surface of the body of the support guide;
connecting the heating wire supported by the support guide with a power supply in a failure test circuit; and
varying a current on the heating wire to heat the heating wire and thereby subject the DUT to thermal and physical stress.

13. The failure testing method of claim 12 , wherein the body comprises a rod having the threaded surface.

14. The failure testing method of claim 12 , wherein the heat resistant, non-conductive material comprises ceramic.

15. The failure testing method of claim 12 , wherein the ceramic comprises YZ zirconia.

16. The failure testing method of claim 12 , wherein the heating wire comprises a Nichrome wire.

17. The failure testing method of claim 16 , wherein the Nichrome wire comprises 80% nickel, 20% chrome, and is 22 American Wire Gauge (AWG) in diameter.

18. The failure testing method of claim 12 , wherein the threaded surface comprises a thread having a TPI (threads per inch) of 8.

19. The failure testing method of claim 12 , wherein the threaded surface comprises a thread having a pitch, a minor diameter, and a major diameter for supporting the coiled heating wire while under failure test.

20. The failure testing method of claim 19 , wherein the pitch is 60 degrees, the minor diameter is 0.09 inches, and the major diameter is 0.15 inches.

Assignees

• Bsh Home Appliances Corp
• Bsh Hausgeraete Gmbh
• Bsh Home Appliance Corp

Inventors

• Jones Robert
• Jones Shaun

Classifications

• G01R1/04 Primary

  Housings; Supporting members; Arrangements of terminals · CPC title

• H05B2203/014

  Heaters using resistive wires or cables not provided for in H05B3/54 · CPC title

• G01R31/2875

  related to heating · CPC title

• H05B3/12 Primary

  characterised by the composition or nature of the conductive material · CPC title