Patent US3796853A successfully refreshed from Google Patents.
US3796853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Connection type carbon electrode
Assignee: Panasonic Holdings Corp
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Filing: 1972-12-18
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Granted: 1974-03-12
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Expires: 1992-12-18
Abstract
Abstract A connectable carbon electrode having a coaxial projecting portion and a coaxial socket portion for connecting a plurality of the electrodes in succession in which a plurality of elongated indentations are provided on the projecting portion along a predetermined length thereof. This enables the projecting portion to be securely fitted into the inner wall of the socket portion by scrapping off the indentations by the inner wall of the socket portion.
Inventors
- 👤 K Matsuo
- 👤 F Mizukami
- 👤 H Ishii
- 👤 K Ishihara
- 👤 M Maeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:31
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; H05B7/14; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K7/00; B23K7/10; B23K9/00; B23K9/12; B23K9/121; H05B7/06; H05B7/08; H05B7/085; Y; Y02; Y02P; Y02P10/00; Y02P10/25; Y10; Y10S; Y10S403/00; Y10S403/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
338 words
A connectable carbon electrode comprising an electrode body of carbon coated on its outer periphery with a thin copper layer, a coaxial projecting portion of carbon material provided on one end of said body and coated on its peripheral surface along a predetermined length with a slightly tapered thin copper layer, which is continuous with the copper layer on the outer periphery of the electrode body, a remaining part of said predetermined length of the projecting portion being provided with elongated indentations of carbon, a coaxial socket portion of carbon material provided inside the other end of said body and having an inner wall surface defining the socket in a substantially similar shape to said projecting portion, said socket being coated with a thin tapered copper layer along a predetermined length of the inner wall, which is continuous with the thin copper layer on the outer periphery of the electrode body and which extends inwardly from the open end of the socket in a first section thereof, the socket having a second section inwardly of said first section and with an inner diameter smaller than the inner diameter of said first section, the inner diameter of said second section being smaller than the outer diameter of the remaining part having said elongated indentations and the inner diameter of said first section is larger than the largest outer diameter of said projectinG portion of carbon material, whereby when a projecting portion of a connectable carbon electrode is inserted into a socket portion of a corresponding electrode the remaining part of said projecting portion having the indentations is tightly received in said second section of said socket as the carbon is partially scraped off the remaining part along the walls of said second section during insertion, and said slightly tapered thin copper layer on said projecting portion is wedged into tight engagement with the thin tapered copper layer in said first section of said socket so as to provide a good electrical and a strong mechanical connection between the electrodes.
Claim 2
Dependent Claim
338 words
A connectable carbon electrode comprising an electrode body of carbon coated on its outer periphery with a thin copper layer, a coaxial projecting portion of carbon material provided on one end of said body and coated on its peripheral surface along a predetermined length with a slightly tapered thin copper layer, which is continuous with the copper layer on the outer periphery of the electrode body, a remaining part of said predetermined length of the projecting portion being provided with elongated indentations of carbon, a coaxial socket portion of carbon material provided inside the other end of said body and having an inner wall surface defining the socket in a substantially similar shape to said projecting portion, said socket being coated with a thin tapered copper layer along a predetermined length of the inner wall, which is continuous with the thin copper layer on the outer periphery of the electrode body and which extends inwardly from the open end of the socket in a first section thereof, the socket having a second section inwardly of said first section and with an inner diameter smaller than the inner diameter of said first section, the inner diameter of said second section being smaller than the outer diameter of the remaining part having said elongated indentations and the inner diameter of said first section is larger than the largest outer diameter of said projectinG portion of carbon material, whereby when a projecting portion of a connectable carbon electrode is inserted into a socket portion of a corresponding electrode the remaining part of said projecting portion having the indentations is tightly received in said second section of said socket as the carbon is partially scraped off the remaining part along the walls of said second section during insertion, and said slightly tapered thin copper layer on said projecting portion is wedged into tight engagement with the thin tapered copper layer in said first section of said socket so as to provide a good electrical and a strong mechanical connection between the electrodes.
Claim 3
Dependent Claim
26 words
A connectable carbon electrode according to claim 1, wherein said peripheral surface of the predetermined length of said projecting portion is tapered from the electrode body.
Claim 4
Dependent Claim
30 words
A connectable carbon electrode according to claim 1, wherein the diameter of the predetermined length of said projecting portion and the diameter of said remaining part are approximately the same.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |