US3569611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage line
Assignee: US Philips Corp
•
Filing: 1968-12-18
•
Granted: 1971-03-09
•
Expires: 1988-12-18
Abstract
Abstract A high voltage cable comprising an insulating pipe coated on its inner surface with a conductive layer of lacquer. An inner conductor is coaxially mounted in the pipe and is supported within a core of nondeformable synthetic resin foam that fills the pipe. The inner conductor is conductively connected to the conductive layer of lacquer.
Inventors
- 👤 Werner Berends
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:48
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/02; H01B9/027; H01B7/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
A high-voltage cable comprising an inner electric conductor, a core composed of a substantially nondeformable synthetic resin foam surrounding said conductor in intimate contact therewith, and a pipe enclosing said core and composed of an electric insulator material having its inside surface coated with an electrically conductive layer of lacquer.
Claim 2
Dependent Claim
50 words
A high-voltage cable comprising an inner electric conductor, a core composed of a substantially nondeformable synthetic resin foam surrounding said conductor in intimate contact therewith, and a pipe enclosing said core and composed of an electric insulator material having its inside surface coated with an electrically conductive layer of lacquer.
Claim 3
Dependent Claim
18 words
A high-voltage cable as claimed in claim 1 wherein the insulating pipe consists of a thermoplastic synthetic resin.
Claim 4
Dependent Claim
41 words
A high-voltage cable as claimed in claim 1 and adapted for use as a cathode connection line, said cable further comprising a second inner conductor enclosed within the insulating pipe and the foam core and insulated from the other inner conductor.
Claim 5
Dependent Claim
38 words
A high-voltage cable as claimed in claim 1 wherein the internal conductor is composed of an electric resistance wire and the conductive layer of lacquer is composed of a material that exhibits an electric resistance of finite magnitude.
Claim 6
Dependent Claim
25 words
A high-voltage cable as claimed in claim 1 wherein the synthetic resin of the core is selected from the group consisting of polyurethane and polystyrene.
Claim 7
Dependent Claim
30 words
A cable as claimed in claim 2 wherein the pipe is composed of an insulating synthetic resin selected from the group consisting of polypropylene, polyethylene, polymethylmethacrylate, polycarbonate and polysulphone resin.
Claim 8
Dependent Claim
55 words
A cable as claimed in claim 1 wherein said inner conductor and said conductive layer of lacquer are electrically connected and are dimensioned so that the electric conductivity of the layer is considerably lower than the electric conductivity of the inner conductor whereby substantially all of the current flow will be in the inner conductor.
Claim 9
Dependent Claim
36 words
A cable as claimed in claim 1 further comprising a second insulating pipe coaxially enclosing the first pipe, and a core of nondeformable synthetic resin foam within said second pipe and surrounding the first insulating pipe.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |