Patent US5355423A successfully refreshed from Google Patents.
US5355423A
Expired / Lapsed
US
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Optical temperature probe assembly
Assignee: Rosemount Inc
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Filing: 1992-07-16
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Granted: 1994-10-11
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Expires: 2012-07-16
Abstract
Abstract A temperature probe includes a sensor material optically communicating with a waveguide, and a sheath having a sheath coefficient of thermal expansion substantially matched to a thermal expansion coefficient of the waveguide. The waveguide has first and second ends secured proximate corresponding sheath ends. In another aspect of the invention, waveguide ends are secured near the sheath ends, the sheath is bent at one or more locations so that it is noncylindrical, and a midsection of the waveguide is loosely held within the bent sheath. In still another aspect of the invention, a metallic tube with the sensor material disposed therein is secured to the waveguide by direct attachment to a metallic coating on the waveguide.
Inventors
- 👤 Richard W. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:14
CPC Classifications
G; G01; G01K; G01K11/00; G01K11/20
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
84 words
A temperature probe, comprising: a sheath having a first and second sheath end, and further having a sheath coefficient of thermal expansion; a waveguide having a first waveguide end secured proximate the first sheath end and a second waveguide end secured proximate the second sheath end, the waveguide having a waveguide coefficient of thermal expansion; and a sensor material having a thermally responsive characteristic, and in optical communication with the second waveguide end; wherein the sheath coefficient is substantially matched to the waveguide coefficient.
Claim 2
Dependent Claim
84 words
A temperature probe, comprising: a sheath having a first and second sheath end, and further having a sheath coefficient of thermal expansion; a waveguide having a first waveguide end secured proximate the first sheath end and a second waveguide end secured proximate the second sheath end, the waveguide having a waveguide coefficient of thermal expansion; and a sensor material having a thermally responsive characteristic, and in optical communication with the second waveguide end; wherein the sheath coefficient is substantially matched to the waveguide coefficient.
Claim 3
Dependent Claim
21 words
The temperature probe as recited in claim 1, wherein the sheath coefficient is not greater than 25 times the waveguide coefficient.
Claim 4
Dependent Claim
26 words
The temperature probe as recited in claim 1, wherein a ratio of the sheath coefficient to the waveguide coefficient has a magnitude between 10 and 1/10.
Claim 5
Dependent Claim
26 words
The temperature probe as recited in claim 1, wherein a ratio of the sheath coefficient to the waveguide coefficient has a magnitude between 5 and 1/5.
Claim 6
Dependent Claim
39 words
The temperature probe as recited in any one of claims 1, 2, 3, or 4, wherein the waveguide includes a light-guiding core comprising silica, and wherein the waveguide coefficient is substantially equal to a thermal expansion coefficient of silica.
Claim 7
Dependent Claim
26 words
The temperature probe as recited in claim 5, wherein the sheath comprises a material selected from the group consisting of platinum, platinum-rhodium alloy, and iron-nickel alloy.
Claim 8
Dependent Claim
24 words
The temperature probe as recited in claim 1, wherein the sensor material comprises a luminescent material, and wherein the characteristic is a luminescent lifetime.
Claim 9
Dependent Claim
35 words
The temperature probe as recited in claim 1, further comprising: a mating member connecting the first waveguide end to the first sheath end, the mating member having a bore for receiving the first waveguide end.
Claim 10
Dependent Claim
32 words
The temperature probe as recited in claim 1, further comprising: a metallic tube held at the second waveguide end and containing the sensor material; wherein the metallic tube attaches to the sheath.
Claim 11
Dependent Claim
23 words
The temperature probe as recited in claim 9, wherein the metallic tube attaches to the sheath by a braze, weld, or solder joint.
Claim 12
Dependent Claim
26 words
The temperature probe as recited in claim 9, wherein the tube has a tube coefficient of thermal expansion which is substantially matched to the waveguide coefficient.
Claim 13
Dependent Claim
20 words
The temperature probe as recited in claim 1, wherein the sheath is adapted to malleably bend into a noncylindrical shape.
Claim 14
Dependent Claim
20 words
The temperature probe as recited in claim 12, further comprising: a buffer layer disposed between the waveguide and the sheath.
Claim 15
Dependent Claim
14 words
The temperature probe as recited in claim 13, wherein the buffer layer is porous.
Claim 16
Dependent Claim
16 words
The temperature probe as recited in claim 14, wherein the buffer layer includes braided fibrous sleeving.
Claim 17
Dependent Claim
102 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; and a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube being held to the waveguide proximate the waveguide end; wherein the waveguide has a waveguide coefficient of thermal expansion, the metallic tube has a tube coefficient of thermal expansion, and the tube coefficient is substantially matched to the waveguide coefficient.
Claim 18
Dependent Claim
102 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; and a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube being held to the waveguide proximate the waveguide end; wherein the waveguide has a waveguide coefficient of thermal expansion, the metallic tube has a tube coefficient of thermal expansion, and the tube coefficient is substantially matched to the waveguide coefficient.
Claim 19
Dependent Claim
21 words
The temperature probe as recited in claim 16, wherein the tube coefficient is not greater than 25 times the waveguide coefficient.
Claim 20
Dependent Claim
26 words
The temperature probe as recited in claim 16, wherein the ratio of the tube coefficient in the waveguide coefficient has a magnitude between 10 and 1/10.
Claim 21
Dependent Claim
26 words
The temperature probe as recited in claim 16, wherein a ratio of the tube coefficient to the waveguide coefficient has a magnitude between 5 and 1/5.
Claim 22
Dependent Claim
39 words
The temperature probe as recited in any one of claims 16, 17, 18, or 19, wherein the waveguide includes a light-guiding core comprising silica, and wherein the waveguide coefficient is substantially equal to a thermal expansion coefficient of silica.
Claim 23
Dependent Claim
27 words
The temperature probe as recited in claim 20, wherein the metallic tube comprises a material selected from the group consisting of platinum, platinum-rhodium alloy, and iron-nickel alloy.
Claim 24
Dependent Claim
14 words
The temperature probe as recited in claim 21, wherein the metallic coating comprises gold.
Claim 25
Dependent Claim
14 words
The temperature probe as recited in claim 21, wherein the metallic coating comprises nickel.
Claim 26
Dependent Claim
43 words
The temperature probe as recited in claim 16, further comprising: a sheath in which the metallic coating, metallic tube, and waveguide are disposed, the sheath having a sheath coefficient of thermal expansion; wherein the sheath coefficient is substantially matched to the waveguide coefficient.
Claim 27
Dependent Claim
20 words
The temperature probe as recited in claim 24, wherein the sheath is adapted to malleably bend into a noncylindrical shape.
Claim 28
Dependent Claim
74 words
A temperature probe, comprising: a sheath having a first and second sheath end; a waveguide having a first waveguide and secured proximate the first sheath end, a second waveguide end secured proximate the second sheath end, and waveguide midsection; and a sensor material having the thermally responsive characteristic, and in optical communication with the second waveguide end; wherein the sheath has a noncylindrical shape, and the waveguide midsection is loosely held within the sheath.
Claim 29
Dependent Claim
74 words
A temperature probe, comprising: a sheath having a first and second sheath end; a waveguide having a first waveguide and secured proximate the first sheath end, a second waveguide end secured proximate the second sheath end, and waveguide midsection; and a sensor material having the thermally responsive characteristic, and in optical communication with the second waveguide end; wherein the sheath has a noncylindrical shape, and the waveguide midsection is loosely held within the sheath.
Claim 30
Dependent Claim
21 words
The temperature probe as recited in claim 26, further comprising: a buffer layer disposed between the waveguide midsection and the sheath.
Claim 31
Dependent Claim
16 words
The temperature probe as recited in claim 27, wherein the buffer layer comprises braided silica sleeving.
Claim 32
Dependent Claim
97 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; and a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube being held to the waveguide proximate the waveguide end; wherein the sensor material is a luminescent powder tightly packed between the metallic tube and the waveguide, and wherein the characteristic is a lifetime of luminescence.
Claim 33
Dependent Claim
97 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; and a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube being held to the waveguide proximate the waveguide end; wherein the sensor material is a luminescent powder tightly packed between the metallic tube and the waveguide, and wherein the characteristic is a lifetime of luminescence.
Claim 34
Dependent Claim
110 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube having a first open tube end held to the waveguide and a second open tube end; and an end cap substantially sealing the second open tub end to prevent escape of the sensor material from the metallic tube, the end cap having a reflective surface adjacent the sensor material.
Claim 35
Dependent Claim
110 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube having a first open tube end held to the waveguide and a second open tube end; and an end cap substantially sealing the second open tub end to prevent escape of the sensor material from the metallic tube, the end cap having a reflective surface adjacent the sensor material.
Claim 36
Dependent Claim
83 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube being held to the waveguide proximate the waveguide end; and a metallic plating substantially covering the metallic coating and the metallic tube.
Claim 37
Dependent Claim
83 words
A temperature probe, comprising: a sensor material having a thermally responsive characteristic; a waveguide having an outside surface and a waveguide end which is in optical communication with the sensor material; a metallic coating covering at least a portion of the waveguide outside surface; a metallic tube attached to the metallic coating with the sensor material disposed therein, the metallic tube being held to the waveguide proximate the waveguide end; and a metallic plating substantially covering the metallic coating and the metallic tube.
Claim 38
Dependent Claim
24 words
The temperature probe as recited in any one of claims 16, 29, 30 or 31, wherein the metallic tube is a unitary metallic tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |