Claims
- 1. A solder insert to be positioned within a transparent heat-recoverable member comprising a solder and a flux composition comprising solder flux and a chemically reactive component, said flux composition being capable of undergoing a chemical reaction between the flux and the chemically reactive component resulting in a visible color change at the soldering temperature.
- 2. A solder insert in accordance with claim 1 in the shape of a ring.
- 3. A solder insert in accordance with claim 1, wherein said solder is coated with said flux composition.
- 4. A solder insert in accordance with claim 1, wherein said solder flux comprises a rosin-based solder flux.
- 5. A solder insert in accordance with claim 1, wherein said flux composition undergoes a change in color from a colored state to a colorless state.
- 6. A solder insert in accordance with claim 1, wherein said chemically reactive component is thymolsulfonphthalein.
- 7. A solder insert in accordance with claim 1, wherein said chemically reactive component is 3',3",5',5"-tetrabromo-m-cresolsulfonphthalein.
- 8. A solder insert in accordance with claim 1, wherein said chemically reactive component is basic fuchsine derived from aniline and toluidine.
Parent Case Info
This application is a continuation of copending application Ser. No. 683,910, filed Dec. 19, 1984, now U.S. Pat. No. 4,688,713, which in turn is a divisional application of application Ser. No. 308,867, filed Oct. 5, 1981, now U.S. Pat. No. 4,505,421.
US Referenced Citations (22)
Foreign Referenced Citations (10)
Number |
Date |
Country |
2809461 |
Sep 1978 |
DEX |
52-41478 |
Oct 1977 |
JPX |
53-15243 |
Feb 1978 |
JPX |
54-153293 |
Dec 1979 |
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689462 |
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Oct 1981 |
GBX |
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GBX |
Non-Patent Literature Citations (3)
Entry |
"Crayons, Paints, Labels Tell Part Temperatures" Welding Design and Fabrication, Dec. 1981, p. 82. |
"One-Shot Temperature Indicators"--Assembly Engineering, Dec. 197 9, pp. 14-15. |
"Transparent Flip Chip for Monitoring Flux Cleaning" IBN Technical Disclosure Bulletin, vol. 18, No. 10, Mar. 1978, p. 3231. |
Divisions (1)
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Number |
Date |
Country |
Parent |
308867 |
Oct 1981 |
|
Continuations (1)
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Number |
Date |
Country |
Parent |
683910 |
Dec 1984 |
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