Patent US3857658A successfully refreshed from Google Patents.
Patent US3818759A successfully refreshed from Google Patents.
US3818759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for discontinuously measuring the level of liquid metal supplied to a container
Assignee: Interatom Internationale Atomreaktorbau GmbH
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Filing: 1972-08-31
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Granted: 1974-06-25
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Expires: 1992-08-31
Abstract
Abstract Exchangable device for discontinuouly measuring the level of liquid metal in a container in accordance with induction principles includes a casing tube insertable into a container adapted to receive liquid metal therein,a casing tube flange tightly connected to the casing tube and tightly connectible to a flange formed on the container, at least one coil core mounted in the casing tube, the coil core being formed of a material selected from the group consisting of soft iron and austenitic iron and steel, at least one primary and one secondary coil mounted on the coil core the primary and secondary coil together forming a measurement sensor, the primary coil being energizable by a constant intermediate frequency alternating current for inducing a monitorable voltage in the secondary coil variable in value in accordance with the absence or presence of liquid metal at the level of the measurement sensor, a spacer tube of given length received in the casing tube and connected at one end thereof to the coil core, and a plug member sealingly secured to the casing tube flange and connected to the other end of the spacer tube.
Inventors
- 👤 D Cremer
- 👤 R Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:13
CPC Classifications
G; G21; G21C; G21C17/00; G21C17/02; G21C17/022; G21C17/025; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S73/00; Y10S73/05
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
239 words
A replaceable probe device for use in measuring the level of liquid metal in a container in accordance with induction principles, comprising in combination, a single casing tube insertable into a container, said container adapted to receive liquid metal therein, a casing tube flange tightly connected to said casing tube and tightly connectable to a flange formed on the container, at least one coil core means mounted in said casing tube, said coil core means being formed of a material selected from the group consisting of soft iron and austenitic iron and steel, at least one primary and one secondary coil mounted on said coil core means said primary and secondary coil together forming a measurement sensor, said primary coil being energizable by a constant intermediate-frequency alternating current source for inducing a monitorable voltage in the secondary coil variable in value in accordance with the absence or presence of liquid metal at the level of the measurement sensor, means for spacing the coil core means including at least one spacer tube of selected length connected in the casing tube to said core means and a plug member sealingly secured to said casing tube flange and connected to one end of said spacer tube, the other end of the spacer tube connected to one end of the coil core means, to dispose the coils mounted on the core means at about the level of the liquid metal to be indicated.
Claim 2
Dependent Claim
239 words
A replaceable probe device for use in measuring the level of liquid metal in a container in accordance with induction principles, comprising in combination, a single casing tube insertable into a container, said container adapted to receive liquid metal therein, a casing tube flange tightly connected to said casing tube and tightly connectable to a flange formed on the container, at least one coil core means mounted in said casing tube, said coil core means being formed of a material selected from the group consisting of soft iron and austenitic iron and steel, at least one primary and one secondary coil mounted on said coil core means said primary and secondary coil together forming a measurement sensor, said primary coil being energizable by a constant intermediate-frequency alternating current source for inducing a monitorable voltage in the secondary coil variable in value in accordance with the absence or presence of liquid metal at the level of the measurement sensor, means for spacing the coil core means including at least one spacer tube of selected length connected in the casing tube to said core means and a plug member sealingly secured to said casing tube flange and connected to one end of said spacer tube, the other end of the spacer tube connected to one end of the coil core means, to dispose the coils mounted on the core means at about the level of the liquid metal to be indicated.
Claim 3
Dependent Claim
63 words
Device according to claim 1 including at least another spacer tube and another coil core carrying a primary and a secondary coil to form another measurement sensor for independently measuring the level of liquid metal at a different height, said other spacer tube being connected at its upper and lower ends to and between said first-mentioned coil core and said other coil core.
Claim 4
Dependent Claim
35 words
Device according to claim 1 including a plurality of pins extending tangentially to said coil core through corresponding bores formed therein and in said space tube for connecting said coil core to said spacer tube.
Claim 5
Dependent Claim
41 words
Device according to claim 1 including a closure member at said one end of said spacer tube and formed with at least one opening through which wire ends of said primary and secondary coils sealingly extend out of said spacer tube.
Claim 6
Dependent Claim
53 words
Device according to claim 1 having a plurality of measurement sensors disposed vertically one above the other in said casing tube with each measurement sensor separated from the next measurement sensor by a spacer tube, each measurement sensor for measuring the level of the liquid metal in the container at a different height.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |