US3801724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety-anchored multi-conductor water-cooled electric arc furnace cable
Assignee: Individual
•
Filing: 1972-09-15
•
Granted: 1974-04-02
•
Expires: 1992-09-15
Abstract
Abstract The ends of the individual conductor cable ropes of this multiconductor water-cooled electric arc furnace cable are secured within the cup or pocket of the terminal by embedding them in solder. In order to prevent the individual conductor cable ropes from dropping out of the terminal pocket or cup when a clogging or other failure of the water cooling system causes the cable to overheat and consequently melt the solder, two of the individual conductor cables are additionally secured to the bottom wall of the terminal cup or pocket by being encased in an L-shaped tubular conductor clamp. The transverse arm of each such clamp, and the cable rope end therein are drilled for the reception of the shank of a threaded fastener, such as a bolt, the shank of which passes through a bore in the bottom or end wall of the terminal cup and receives a threaded nut on the exterior thereof.
Inventors
- 👤 D Goodman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:31
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/11; H01; H01B; H01B9/00; H01B9/001
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
A safety-anchorage construction for the conductors of an electric arc furnace, said construction comprising a multiconductor electric cable having a hose with a set of electrical conductors of the same polarity encased therein and having a tubular liquid coolant conducting conduit extending through the center thereof, an electric arc furnace connection terminal having a furnace connection portion at its forward end and having a cable conductor connection portion extending rearwardly from said furnace connection portion, said cable conductor connection portion having a hollow cylindrical side wall disposed within said hose in liquidtight relationship therewith and also having an end wall with said walls defining a conductor-receiving cavity, the forward end portions of said conductors being disposed within said cavity, a heat-resistant mechanical conductor clamping device disposed in said cavity in engagement with the forward end portion of one of said conductors and securing said one conductor to said end wall of said cable conductor-connection portion in electrical conducting relationship therewith, and a fusible electrically-conducting filler mateRial also disposed in said cavity and electrically connecting said cable conductor end portions to said cable conductor connection portion.
Claim 2
Dependent Claim
185 words
A safety-anchorage construction for the conductors of an electric arc furnace, said construction comprising a multiconductor electric cable having a hose with a set of electrical conductors of the same polarity encased therein and having a tubular liquid coolant conducting conduit extending through the center thereof, an electric arc furnace connection terminal having a furnace connection portion at its forward end and having a cable conductor connection portion extending rearwardly from said furnace connection portion, said cable conductor connection portion having a hollow cylindrical side wall disposed within said hose in liquidtight relationship therewith and also having an end wall with said walls defining a conductor-receiving cavity, the forward end portions of said conductors being disposed within said cavity, a heat-resistant mechanical conductor clamping device disposed in said cavity in engagement with the forward end portion of one of said conductors and securing said one conductor to said end wall of said cable conductor-connection portion in electrical conducting relationship therewith, and a fusible electrically-conducting filler mateRial also disposed in said cavity and electrically connecting said cable conductor end portions to said cable conductor connection portion.
Claim 3
Dependent Claim
49 words
A safety-anchored construction, according to claim 1, wherein said conductor clamping device includes a tubular conductor clamp encasing the end portion of said one conductor and also includes means for securing said clamp and said end portion of said one conductor to said end wall of said terminal cup.
Claim 4
Dependent Claim
38 words
A safety-anchored construction, according to claim 2, wherein said forward end portion of said one conductor and said conductor clamp have aligned holes therein, and wherein said clamp securing means passes through said holes into said end wall.
Claim 5
Dependent Claim
46 words
A safety-anchored construction, according to claim 2, wherein said tubular conductor clamp is approximately L-shaped with a relatively long arm extending longitudinally of said terminal and with a shorter arm extending transversely of said terminal in abutting engagement with said end wall of said terminal cup.
Claim 6
Dependent Claim
25 words
A safety-anchored construction, according to claim 2, wherein said clamp securing means includes a threaded fastener connecting said clamp to said terminal cup end wall.
Claim 7
Dependent Claim
40 words
A safety-anchored construction, according to claim 5, wherein said threaded fastener includes a bolt extending through said terminal cup end wall and also includes a threaded nut disposed externally of said end wall in threaded engagement with said threaded fastener.
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |