Patent US3791209A successfully refreshed from Google Patents.
US3791209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature recording lance
Assignee: Individual
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Filing: 1971-11-11
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Granted: 1974-02-12
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Expires: 1991-11-11
Abstract
Abstract An expendable recording lance or probe adapted for immersion in hot baths such as molten metals or salts and for mounting over the end of an elongated lance holder containing wires for interconnecting the lance with an electrical device for converting electrical information obtained from the lance to useful information. The lance includes an elongated hollow tube carrying a recording device at its front end and covered by a metallic sheath projecting beyond the front end of the tube over the recording device to protect the recording device as the lance is plunged into a hot bath.
Inventors
- 👤 W Norburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:34
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
130 words
An expendable recording lance adapted for immersion in hot baths and for attachment over the forward end of a conventional elongated lance holder, said lance comprising: an elongated hollow tube adapted to slidably fit over an elongated lance holder; an electrical recording device attached to the front end of said tube and connected to wires extending through said tube to a connection with said lance holder; and a relatively thin metallic sheath surrounding said hollow tube and extending rearwardly from said front end over a sufficient length of said tube to at least cover the portion of said hollow tube that is normally immersed in a hot bath to eliminate splashing when said lance is initially immersed in hot baths containing certain materials; said tube being composed of carbonized cardboard.
Claim 2
Dependent Claim
130 words
An expendable recording lance adapted for immersion in hot baths and for attachment over the forward end of a conventional elongated lance holder, said lance comprising: an elongated hollow tube adapted to slidably fit over an elongated lance holder; an electrical recording device attached to the front end of said tube and connected to wires extending through said tube to a connection with said lance holder; and a relatively thin metallic sheath surrounding said hollow tube and extending rearwardly from said front end over a sufficient length of said tube to at least cover the portion of said hollow tube that is normally immersed in a hot bath to eliminate splashing when said lance is initially immersed in hot baths containing certain materials; said tube being composed of carbonized cardboard.
Claim 3
Dependent Claim
12 words
The lance of claim 1 wherein said carbonized cardboard tube is charred.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |