US3813938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode holder for electromagnetic flowmeters
Assignee: Fischer and Porter Co
•
Filing: 1972-12-04
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Granted: 1974-06-04
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Expires: 1992-12-04
Abstract
Abstract An electrode holder for an electromagnetic flowmeter whose flow tube is provided with a lateral extension having a passage therein into which a metering electrode is insertable, the tip of the inserted electrode being in contact with the fluid conducted through the tube. The holder includes a case which is attachable to the flow tube extension. A sealing support is housed within the case, the support having an electrode passage therein which registers with the passage in the flow tube extension. Disposed at the mouth of the electrode passage is a shut-off device which, when the electrode is inserted, is displaced to permit the electrode to enter the passage, but when the electrode is withdrawn, acts automatically to block the mouth of the passage to prevent leakage of fluid.
Inventors
- 👤 H Grosch
- 👤 H Oelbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:47
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; G01F1/584; G01F15/00; G01F15/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
An electrode holder for an electro-magnetic flowmeter whose flow tube is provided with a lateral extension having a passage therein into which a metering electrode is insertable to bring the tip thereof in contact with the fluid conducted through the tube, said holder comprising: A. a demountable case attachable to said extension, and projecting therefrom, B. a sealing support housed in said case and having an electrode passage which registers axially with the extension passage, and C. a shut-off device disposed at the mouth of the electrode passage, and accessible for replacement when said case is detached from said extension, said device having means which in the absence of the metering electrode blocks the mouth and which, when the electrode is inserted, is displaced to permit it to enter the electrode passage, said device reverting automatically to its blocking position when the electrode is withdrawn.
Claim 2
Dependent Claim
145 words
An electrode holder for an electro-magnetic flowmeter whose flow tube is provided with a lateral extension having a passage therein into which a metering electrode is insertable to bring the tip thereof in contact with the fluid conducted through the tube, said holder comprising: A. a demountable case attachable to said extension, and projecting therefrom, B. a sealing support housed in said case and having an electrode passage which registers axially with the extension passage, and C. a shut-off device disposed at the mouth of the electrode passage, and accessible for replacement when said case is detached from said extension, said device having means which in the absence of the metering electrode blocks the mouth and which, when the electrode is inserted, is displaced to permit it to enter the electrode passage, said device reverting automatically to its blocking position when the electrode is withdrawn.
Claim 3
Dependent Claim
31 words
A holder as set forth in claim 1, wherein said shut-off device is constituted by a flexible tongue of elastomeric material which normally lies over the mouth of the electrode passage.
Claim 4
Dependent Claim
56 words
A holder as set forth in claim 1, wherein said shut-off device is constituted by a displaceable valve ball which is spring by a srping disposed in a guide sleeve normally to block said mouth, said sleeve being transversely arranged relative to said electrode passage, said ball being displaced into said sleeve by an inserted electrode.
Claim 5
Dependent Claim
73 words
A holder as set forth in claim 1, further including a tubular lug whose front section is disposed within said case and which extends therefrom, the front face of said lug being adjacent the mouth of said electrode passage in said sealing support and having a passage therein in registration with said electrode passage, the rear end of said electrode being secured to a knob whose shank is threadably received in said lug.
Claim 6
Dependent Claim
49 words
A holder as set forth in claim 4, wherein saiD shut-off device is constituted by a rubber gasket interposed between the front face of said lug and said support, said gasket having a tongue punched therein adapted to block said mouth and to be displaced by an inserted electrode.
Claim 7
Dependent Claim
57 words
A holder as set forth in claim 4, wherein said shut-off device is constituted by a guide sleeve disposed in said sealing support at an angle to the mouth of said electrode passage, said sleeve having a compression spring therein which normally urges a valve ball against said mouth, said ball being displaced by the inserted electrode.
Claim 8
Dependent Claim
24 words
A holder as set forth in claim 4, wherein the front section of said lug in said case is surrounded by an insulating bushing.
References Cited (Backward Citations)
US2766621A
Cited
US2780773A
Cited
US2810879A
Cited
US2985821A
Cited
DE1200558B
Cited
GB1124154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |