US3813468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodes for glass furnaces
Assignee: Dyson Refractories Ltd
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Filing: 1973-05-30
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Granted: 1974-05-28
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Expires: 1993-05-30
Abstract
Abstract A ceramic electrode for glass furnaces comprises an electrode body having one or more longitudinal holes there being inserted in the or each hole expandable tube means formed from electrically conductive material there being further means passing along the expandable tube capable of movement relative to the tube to effect expansion of the tube whereby the tube is brought into intimate contact with the electrode, said tube and said movable means extending out of the electrode to means capable of effecting the relative movement, the tube being connected to a source of electrical power.
Inventors
- 👤 G Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:43
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/02; H05B3/03; Y; Y10; Y10S; Y10S65/00; Y10S65/04; Y10S65/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
A ceramic electrode for glass furnaces comprising an electrode body having a longitudinal hole, there being inserted in the hole an expandable tube formed from electrically conductive material, there being further means passing through the expandable tube capable of relative movement to the tube to effect expansion of the tube for bringing the tube into intimate electrical contact with the electrode body, and said movable means extending out of the electrode body to means for effecting the relative movement.
Claim 2
Dependent Claim
79 words
A ceramic electrode for glass furnaces comprising an electrode body having a longitudinal hole, there being inserted in the hole an expandable tube formed from electrically conductive material, there being further means passing through the expandable tube capable of relative movement to the tube to effect expansion of the tube for bringing the tube into intimate electrical contact with the electrode body, and said movable means extending out of the electrode body to means for effecting the relative movement.
Claim 3
Dependent Claim
19 words
A ceramic electrode as in claim 1, wherein the means within the tube is formed from electrically conductive material.
Claim 4
Dependent Claim
39 words
A ceramic electrode as in claim 1 wherein the tube is of a material that is inherently sufficiently deformable as to allow expansion by the means within the tube to force the tube into intimate contact with the electrode.
Claim 5
Dependent Claim
36 words
A ceramic electrode as in claim 1 wherein the tube has longitudinal slit means for enabling mechanical expansion of the tube in response to said relative movement while taking up anY thermal expansion of the tube.
Claim 6
Dependent Claim
24 words
A ceramic electrode as in claim 1, wherein the means the tube is split to compensate for thermal expansion of the tube in use.
Claim 7
Dependent Claim
17 words
A ceramic electrode as in claim 1, wherein the means within the tube is a tapered pin.
Claim 8
Dependent Claim
30 words
A ceramic electrode as in claim 6 wherein the means for effecting relative movement comprises screw and nut means associated with the pin and the tube outside the electrode body.
Claim 9
Dependent Claim
21 words
A ceramic electrode as in claim 6 wherein the means for effecting relative movement comprises an external thread on said pin.
Claim 10
Dependent Claim
16 words
A ceramic electrode as in claim 1, wherein the material of the electrode is tin oxide.
Claim 11
Dependent Claim
27 words
A ceramic electrode as in claim 1, wherein the material of the tube is selected from the group consisting of copper, stainless steel, copper-nickel, and nickel alloys.
Claim 12
Dependent Claim
37 words
The apparatus of claim 1 wherein said means passing through the tube comprises means for bringing the tube into intimate contact with the electrode body along the substantially entire length of the tube within the electrode body.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |