US3582586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc-interrupting materials and apparatus
Assignee: ROSTONE Corp A CORP OF INDIANA
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Filing: 1966-03-21
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Granted: 1971-06-01
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Expires: 1986-03-21
Abstract
Abstract An arc-interrupting composition for the walls of electrical circuit interrupting devices to improve the characteristics of such device for interrupting high power circuits. The composition comprises melamine, and a thermoplastic organic binder which is more reactive to arcing than the melamine and under arcing conditions vaporizes or decomposes violently to drive the more stable melamine into the arc and thereby render the melamine effective. Improved effectiveness of the composition over a range or for particular applications may be obtained by adding other components, including melamine-formaldehyde resin, hydrated alumina, and fillers such as silica or aluminum fluoride.
Inventors
- 👤 Paul W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:08
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/70; H01H33/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
An arc-interrupting composition which consists essentially of melamine and a binder, the binder comprises polyethylene or polypropylene and the composition contains approximately two parts melamine to one part binder, said binder being a thermoplastic material which is more responsive to electrical arcing conditions than melamine itself and in the presence of an electric arc vaporizes or otherwise decomposes violently, whereby to drive the melamine with explosive force into the arc and thereby render the arc-quenching properties of the melamine effective in the arc.
Claim 2
Dependent Claim
83 words
An arc-interrupting composition which consists essentially of melamine and a binder, the binder comprises polyethylene or polypropylene and the composition contains approximately two parts melamine to one part binder, said binder being a thermoplastic material which is more responsive to electrical arcing conditions than melamine itself and in the presence of an electric arc vaporizes or otherwise decomposes violently, whereby to drive the melamine with explosive force into the arc and thereby render the arc-quenching properties of the melamine effective in the arc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |