US4232742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-guard for electrical installations
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1978-06-01
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Granted: 1980-11-11
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Expires: 1998-06-01
Abstract
Abstract A flame-guard device for electrical installations which consists of a cable-shaped string of capsules. The capsules contain a flame-extinguishing substance, which is released in case the capsules are heated.
Inventors
- 👤 Willy P. A. Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:18
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/16; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/15; Y10T428/249921; Y10T428/249953; Y10T428/249954
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A flame protective device for electrical cable installations comprising a plurality of capsules secured together one after another to form a string, each of said capsules containing a substance having flame-extinguishing properties, said capsules being constructed to burst or open up when heated, thereby releasing said flame-extinguishing substance, the individual capsules being arranged in a line and a hose surrounding said capsules and maintaining the capsules in spaced positions in said line.
Claim 2
Dependent Claim
72 words
A flame protective device for electrical cable installations comprising a plurality of capsules secured together one after another to form a string, each of said capsules containing a substance having flame-extinguishing properties, said capsules being constructed to burst or open up when heated, thereby releasing said flame-extinguishing substance, the individual capsules being arranged in a line and a hose surrounding said capsules and maintaining the capsules in spaced positions in said line.
Claim 3
Dependent Claim
22 words
A flame protective device according to claim 1 wherein the flame-extinguishing substance consists of a halon, a halon-mixture or a halon-developing substance.
Claim 4
Dependent Claim
86 words
A flame protective device for electrical cable installations comprising a plurality of capsules secured together one after another to form a string, each of said capsules containing a substance having flame-extinguishing properties, said capsules being constructed to burst or open up when heated, thereby releasing said flame-extinguishing substance, said string of capsules including contracted portions between adjacent capsules which maintain the capsules in spaced positions in said string, said contracted portions being provided with apertures therein, said contracted portions including connecting links engaged in said apertures.
Claim 5
Dependent Claim
86 words
A flame protective device for electrical cable installations comprising a plurality of capsules secured together one after another to form a string, each of said capsules containing a substance having flame-extinguishing properties, said capsules being constructed to burst or open up when heated, thereby releasing said flame-extinguishing substance, said string of capsules including contracted portions between adjacent capsules which maintain the capsules in spaced positions in said string, said contracted portions being provided with apertures therein, said contracted portions including connecting links engaged in said apertures.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |