Patent US3558255A successfully refreshed from Google Patents.
US5246293A
Expired / Lapsed
US
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Reference junction for thermocouple measuring
Assignee: Beamex Oy AB
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Filing: 1992-02-19
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Granted: 1993-09-21
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Expires: 2012-02-19
Abstract
Abstract The invention relates to a reference junction for thermocouple measuring, comprising two reference temperature blocks (5) connected with one another heat conductively but dielectrically, one block for each thermocouple conductor and each block provided with a contact surface (4) for receiving the thermocouple conductor, and means (1) for retaining the thermocouple conductors or their attached contacts in contact with the contact surfaces (4) of the respective reference temperature blocks (5). To enable rapid fixing and detachment of the thermocouple conductors or their attached contacts, the means for retaining the thermocouple conductors in contact with their contact surfaces (4) comprise a single unitary retention block (1) pressed by spring-biased action against the contact surfaces.
Inventors
- 👤 Osmo Luotsinen
- 👤 Jorma Savolainen
- 👤 Markku Laitinen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/02; G01K7/023; G01K7/04; G01K7/10; G01K7/12; H; H01; H01R; H01R4/00; H01R4/28; H01R4/48; H01R4/4854
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A reference junction for thermocouple measuring, comprising two reference temperature blocks (5) connected with one another heat conductively but dielectrically, one block for each thermocouple conductor and each block provided with a contact surface (4) for receiving the thermocouple conductor, and means (1) for retaining the thermocouple conductors in contact with the contact surfaces (4) of the respective reference temperature blocks (5), characterized in that the means for retaining the thermocouple conductors in contact with their contact surfaces (4) comprise a single unitary retention block (1) housed in a housing (12) and pressed against the contact surface by spring-biased action opposing said housing.
Claim 2
Dependent Claim
103 words
A reference junction for thermocouple measuring, comprising two reference temperature blocks (5) connected with one another heat conductively but dielectrically, one block for each thermocouple conductor and each block provided with a contact surface (4) for receiving the thermocouple conductor, and means (1) for retaining the thermocouple conductors in contact with the contact surfaces (4) of the respective reference temperature blocks (5), characterized in that the means for retaining the thermocouple conductors in contact with their contact surfaces (4) comprise a single unitary retention block (1) housed in a housing (12) and pressed against the contact surface by spring-biased action opposing said housing.
Claim 3
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 1, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 4
Dependent Claim
28 words
A reference junction for thermocouple measuring in accordance with claim 1, characterized in that the retention block (1) comprises a separate friction surface (2) for each thermocouple conductor.
Claim 5
Dependent Claim
72 words
A reference junction for thermocouple measuring in accordance with claim 3, wherein said housing (12) encases the reference temperature blocks (5), said housing being provided with apertures (3, 3a) aligned with the contact surfaces (4) of the temperature reference blocks (5) for the inlet of the thermocouple conductors, characterized in that the retention block (1) is adapted to close the inlet apertures when no thermocouple conductors are connected to the reference junction.
Claim 6
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 4, characterized in that the retention block (1) comprises a portion adapted t slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 7
Dependent Claim
42 words
A reference junction for thermocouple measuring in accordance with claim 3, characterized in that the retention block (1) is spring-biased by means of two springs (6) located opposite the respective contact surface (4) of the reference temperature block (5) in each case.
Claim 8
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 6, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 9
Dependent Claim
72 words
A reference junction for thermocouple measuring in accordance with claim 6, wherein said housing (12) encases the references temperature blocks (5), said housing being provided with apertures (3, 3a) aligned with the contact surfaces (4) of the temperature reference blocks (5) for the inlet of the thermocouple conductors, characterized in that the retention block (1) is adapted to close the inlet apertures when no thermocouple conductors are connected to the reference junction.
Claim 10
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 8, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 11
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 3, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 12
Dependent Claim
72 words
A reference junction for thermocouple measuring in accordance with claim 1, wherein said housing (12) encases the reference temperature blocks (5), said housing being provided with apertures (3, 3a) aligned with the contact surfaces (4) of the temperature reference blocks (5) for the inlet of the thermocouple conductors, characterized in that the retention block (1) is adapted to close the inlet apertures when no thermocouple conductors are connected to the reference junction.
Claim 13
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 11, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 14
Dependent Claim
42 words
A reference junction for thermocouple measuring in accordance with claim 1, characterized in that the retention block (1) is spring-biased by means of two springs (6) located opposite the respective contact surface (4) of the reference temperature block (5) in each case.
Claim 15
Dependent Claim
72 words
A reference junction for thermocouple measuring in accordance with claim 13 wherein said housing (12) encases the reference temperature blocks (5), said housing being provided with apertures (3, 3a) aligned with the contact surfaces (4) of the temperature references blocks (5) for the inlet of the thermocouple conductors, characterized in that the retention block 91) is adapted to close the inlet apertures when no thermocouple conductors are connected to the reference junction.
Claim 16
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 14, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3', 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
Claim 17
Dependent Claim
52 words
A reference junction for thermocouple measuring in accordance with claim 13, characterized in that the retention block (1) comprises a portion adapted to slide between the reference temperature blocks (5) and the housing (12) and is provided with apertures (3a, 3a') corresponding to the inlet apertures (3, 3a) of the housing (12).
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) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |