Claims
- 1. In a dome-shaped diaphragm of a loud speaker, said diaphragm being of the type constructed of a thin sheet of material shaped into the form of the diaphragm, the improvement characterized by, a coating on at least a part of one surface of said thin sheet of material, said coating being a material selected from the group consisting of boron, an alloy having boron as its major component and a chemical compound of boron.
- 2. A diaphram as claimed in claim 1 wherein at least one surface of said thin sheet is completely coated with said material.
- 3. A diaphragm as claimed in claim 1 wherein said thin sheet of material is aluminum.
- 4. A diaphram as claimed in claim 1 wherein said thin sheet of material is titanium.
- 5. A diaphragm as claimed in claim 1 wherein said thin sheet of material is synthetic resin.
- 6. A diaphram as claimed in claim 1 wherein said thin sheet of material is beryllium.
- 7. A diaphram as claimed in claim 1 wherein said thin sheet of material is an alloy of beryllium.
- 8. A diaphragm as claimed in claim 1 wherein said thin sheet of material has a coating of beryllium or an alloy of beryllium over which said coating material in which boron is the major component is coated.
- 9. A diaphragm as claimed in claim 1 wherein said chemical compound is boron carbide.
- 10. A diaphragm as claimed in claim 1 wherein said chemical compound is boron nitride.
- 11. A diaphragm as claimed in claim 1 wherein said alloy is an alloy of boron and aluminum.
- 12. A diaphragm as claimed in claim 1 wherein said alloy is an alloy of boron and titanium.
Priority Claims (1)
Number |
Date |
Country |
Kind |
50-76816 |
Jun 1975 |
JPX |
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Parent Case Info
This is a continuation, of application Ser. No. 699,399, filed June 24, 1976, now abandoned.
US Referenced Citations (9)
Continuations (1)
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Number |
Date |
Country |
Parent |
699399 |
Jun 1976 |
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