Patent US3278802A successfully refreshed from Google Patents.
US3278802A
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Method for drying the insulation of electrical cables laid in a damp atmosphere, in particular cables of mine networks having insulated neutral and an arrangement for the realization of such method
Assignee: DO NI UGOLNY I
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Filing: 1963-06-07
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Granted: 1966-10-11
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Fanin Alexey Jakovlevich
- 👤 Kochetkov Vladimir Dmitrievich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:15
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/06; G; G01; G01R; G01R31/00; G01R31/50; G01R31/58; H01B13/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
APPARATUS FOR CHECKING THE STATE OF AND FOR DRYING, BY MEANS OF ELECTRICAL OSMOSIS, THE INSULATION OF A THREEPHASE ELECTRICAL NETWORK INCLUDING INSULATION OF COMPONENTS THEREOF COMPRISING A TWO-COIL ELECTROMAGNETIC CURRENT RELAY HAVING OPPOSITELY CONNECTED COILS, A COMBINATION OF STAR-CONNECTED RESISTORS, A COMBINATION OF STARCONNECTED RECTIFIERS HAVING A COMMON STAR POINT, SAID RECTIFIERS AND SAID RESISTORS BEING RESPECTIVELY IN SERIES CONNECTION BETWEEN THE STAR POINT AND THE THREE PHASES OF THE ELECTRICAL NETWORK, A CAPACITOR SHUNTING ONE COIL OF SAID ELECTROMAGNETIC RELAY, A RESISTOR CONNECTED BETWEEN EARTH AND ONE SIDE OF SAID ON E COIL, A CONNECTION BETWEEN THE STAR POINT AND THE OTHER SIDE OF SAID COIL, A FURTHER COMBINATION OF STAR-CONNECTED RESISTOR RELATIVE TO THE THREE PHASES OF SAID NETWORK HAVING A FURTHER STAR POINT, A CONNECTION FROM SAID FURTHER STAR POINT TO ONE SIDE OF THE OTHER COIL, AND A CONTROLLED DIODE CONNECTED BETWEEN SAID ONE SIDE OF THE OTHER COIL AND SAID ONE SIDES OF SAID ONE COIL.
Claim 2
Dependent Claim
162 words
APPARATUS FOR CHECKING THE STATE OF AND FOR DRYING, BY MEANS OF ELECTRICAL OSMOSIS, THE INSULATION OF A THREEPHASE ELECTRICAL NETWORK INCLUDING INSULATION OF COMPONENTS THEREOF COMPRISING A TWO-COIL ELECTROMAGNETIC CURRENT RELAY HAVING OPPOSITELY CONNECTED COILS, A COMBINATION OF STAR-CONNECTED RESISTORS, A COMBINATION OF STARCONNECTED RECTIFIERS HAVING A COMMON STAR POINT, SAID RECTIFIERS AND SAID RESISTORS BEING RESPECTIVELY IN SERIES CONNECTION BETWEEN THE STAR POINT AND THE THREE PHASES OF THE ELECTRICAL NETWORK, A CAPACITOR SHUNTING ONE COIL OF SAID ELECTROMAGNETIC RELAY, A RESISTOR CONNECTED BETWEEN EARTH AND ONE SIDE OF SAID ON E COIL, A CONNECTION BETWEEN THE STAR POINT AND THE OTHER SIDE OF SAID COIL, A FURTHER COMBINATION OF STAR-CONNECTED RESISTOR RELATIVE TO THE THREE PHASES OF SAID NETWORK HAVING A FURTHER STAR POINT, A CONNECTION FROM SAID FURTHER STAR POINT TO ONE SIDE OF THE OTHER COIL, AND A CONTROLLED DIODE CONNECTED BETWEEN SAID ONE SIDE OF THE OTHER COIL AND SAID ONE SIDES OF SAID ONE COIL.
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) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |