US3878314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective apparatus for underground high voltage electrical devices
Assignee: Cooper Power Acquisition Corp
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Filing: 1973-10-26
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Granted: 1975-04-15
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Expires: 1993-10-26
Abstract
Abstract A protective apparatus for underground high voltage electrical devices including a housing which is adapted to be buried in the ground and to contain the electrical device, a housing extension sealed to said housing to provide communication from ground level to the electrical device, an actuator supported in the extension for actuating the device from the ground surface, a fluid dielectric medium substantially completely filling the housing and extension and having a specific gravity greater than water whereby any water entering the housing or extension will accumulate at the top of the fluid medium, a cap telescopically mounted on the extension for adapting the top of the extension to variations in ground level, and a layer of porous material between the cap and the extension to allow water accumulated on the fluid medium to escape from the apparatus.
Inventors
- 👤 Edwin A Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:28
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/46; G02B6/50; G02B6/501; H; H02; H02B; H02B1/00; H02B1/26; H02B1/28; H02B7/00; H02B7/06; H02B7/08; H02G; H02G9/00; H02G9/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A protective apparatus for separating water from a high voltage electrical device comprising: a housing having an opening at the top, an electrical device in said housing, means closing the opening at the top of said housing, means within said housing for actuating said device from ground level, a fluid dielectric medium substantially filling said housing, said medium having a specific gravity greater than water whereby any water entering the housing will accumulate on the surface of the dielectric medium, and means in said closing means for allowing water accumulated at the top of said dielectric medium to escape from said closing means.
Claim 2
Dependent Claim
103 words
A protective apparatus for separating water from a high voltage electrical device comprising: a housing having an opening at the top, an electrical device in said housing, means closing the opening at the top of said housing, means within said housing for actuating said device from ground level, a fluid dielectric medium substantially filling said housing, said medium having a specific gravity greater than water whereby any water entering the housing will accumulate on the surface of the dielectric medium, and means in said closing means for allowing water accumulated at the top of said dielectric medium to escape from said closing means.
Claim 3
Dependent Claim
53 words
The apparatus according to claim 1 wherein said closing means includes a hollow extension connected to said housing to provide communication to ground level and a cap telescopically received over the top of the extension and wherein said escape means includes a layer of porous material positioned between the cap and the extension.
Claim 4
Dependent Claim
15 words
The apparatus according to claim 2 wherein said porous material comprises a layer of felt.
Claim 5
Dependent Claim
14 words
The apparatus according to claim 1 wherein said fluid medium comprises dibromo ethyl benzene.
Claim 6
Dependent Claim
96 words
An underground high voltage protective apparatus saiD apparatus comprising: a housing adapted to be buried in the ground, an opening at the top of said housing, an electrical device supported in said housing, means within said housing for connecting said device to a high voltage source, a fluid dielectric medium substantially filling said housing, said medium having a specific gravity greater than water, and means closing the opening at the top of said housing, said closing means including means for allowing water which accumulates on the surface of the dielectric medium to escape from said housing.
Claim 7
Dependent Claim
96 words
An underground high voltage protective apparatus saiD apparatus comprising: a housing adapted to be buried in the ground, an opening at the top of said housing, an electrical device supported in said housing, means within said housing for connecting said device to a high voltage source, a fluid dielectric medium substantially filling said housing, said medium having a specific gravity greater than water, and means closing the opening at the top of said housing, said closing means including means for allowing water which accumulates on the surface of the dielectric medium to escape from said housing.
Claim 8
Dependent Claim
38 words
The apparatus according to claim 5 wherein said closing means includes a hollow extension and a cap adjustably mounted on said extension and said escape means includes porous means in the space between said cap and said extension.
Claim 9
Dependent Claim
24 words
The apparatus according to claim 5 wherein said fluid dielectric medium is selected from the group consisting of a halogenated ether and halogenated hydrocarbon.
Claim 10
Dependent Claim
64 words
The apparatus according to claim 5 wherein said closing means comprises an extension and a cap mounted for telescoping movement on said extension to adjust the top of said closing means to ground level, and wherein said escape means includes a layer of porous material positioned between said cap and said extension to allow water to escape from the top of said dielectric medium.
Claim 11
Dependent Claim
35 words
The apparatus according to claim 8 including means in said closing means for actuating said electrical device at ground level, said actuating means including an extension connected at said cap for movement with said cap.
References Cited (Backward Citations)
US461239A
Cited
US1437232A
Cited
US1725623A
Cited
US1996423A
Cited
US1931455A
Cited
US3250869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |