US3723935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature sensor
Assignee: Corning Glass Works
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Filing: 1972-02-17
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Granted: 1973-03-27
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Expires: 1992-02-17
Abstract
Abstract A temperature sensor comprising a coil of wire of a high temperature resistant material having a relatively high temperature coefficient of electrical resistance; and a hollow sheath of a high temperature oxidation resistant material having high thermal conductivity, and at least one flat outer side for improved thermal transfer when such flat side is disposed against or in physical contact with a surface of a plate or sheet of a vitreous material providing a cooking surface. The sheath surrounds the coil with a space provided between the sheath and coil, and a compacted powder of an electrical insulating material having a relatively high thermal conductivity surrounds the coil. In one embodiment, the sheath is electrically connected to one end of the coil by a conductor comprising a rod or wire of a high temperature oxidation resistant material having high electrical conductivity. An electrically conductive terminal is also electrically connected to the sheath, preferably at the end thereof opposite said one end of the coil. The second end of the coil is electrically connected to a similar conductor to which another electrically conductive terminal is electrically connected. In another embodiment, both ends of the coil are electrically connected to conductors which extend through the ends of the sheath and are provided with terminals for electrical connections to be made to the coil. In such embodiment no electrical connections are made to the sheath.
Inventors
- 👤 J Frazier
- 👤 G Ziver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:17
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
289 words
A sensor adapted for positioning against a surface of an electrically radiant heated plate or sheet of a vitreous material providing a cooking surface, said sensor being electrically responsive to changes in temperatures of such surface, and such sensor comprising; A. a relatively elongate helically wound coil of wire of a high temperature resistant material having a relatively high temperature coefficient of electrical resistance; B. first and second elongate conductors of a high temperature oxidation resistant material having high electrical conductivity, first ends of said first and second conductors electrically connected to first and second ends of said coil, respectively, so that the conductors are substantially in alignment with the length of the coil; C. a relatively elongate sheath of a high temperature oxidation resistant material having high thermal conductivity, said sheath including a wall having at least one flat outer side and whose inner surface defines the outer limits of a hollow embodied in such sheath and extending longitudinally therethrougH, such sheath surrounding said coil and said conductors with said inner surface of said wall spaced from said coil and conductors, and the second end of at least one said conductor extending out of the corresponding end of the sheath for a selected distance therebeyond; D. a powder of an electrical insulating refractory material having relatively high thermal conductivity and compacted in said sheath in a surrounding relationship with said coil and conductors for substantially the full length of the sheath; and E. means for making first and second electrical connections to said first and second conductors respectively; whereby F. said sensor may be disposed with said flat outer side of the sheath thereof physically contacting an electrically heated surface for electrically sensing the temperature of such surface.
Claim 2
Dependent Claim
289 words
A sensor adapted for positioning against a surface of an electrically radiant heated plate or sheet of a vitreous material providing a cooking surface, said sensor being electrically responsive to changes in temperatures of such surface, and such sensor comprising; A. a relatively elongate helically wound coil of wire of a high temperature resistant material having a relatively high temperature coefficient of electrical resistance; B. first and second elongate conductors of a high temperature oxidation resistant material having high electrical conductivity, first ends of said first and second conductors electrically connected to first and second ends of said coil, respectively, so that the conductors are substantially in alignment with the length of the coil; C. a relatively elongate sheath of a high temperature oxidation resistant material having high thermal conductivity, said sheath including a wall having at least one flat outer side and whose inner surface defines the outer limits of a hollow embodied in such sheath and extending longitudinally therethrougH, such sheath surrounding said coil and said conductors with said inner surface of said wall spaced from said coil and conductors, and the second end of at least one said conductor extending out of the corresponding end of the sheath for a selected distance therebeyond; D. a powder of an electrical insulating refractory material having relatively high thermal conductivity and compacted in said sheath in a surrounding relationship with said coil and conductors for substantially the full length of the sheath; and E. means for making first and second electrical connections to said first and second conductors respectively; whereby F. said sensor may be disposed with said flat outer side of the sheath thereof physically contacting an electrically heated surface for electrically sensing the temperature of such surface.
Claim 3
Dependent Claim
36 words
A sensor as in claim 1 and in which the electrical resistance of said coil increases and decreases, respectively, with increases and decreases in temperature of a heated surface against which said flat side is disposed.
Claim 4
Dependent Claim
47 words
A sensor as in claim 1 and in which the material of said coil comprises a nickel-maganese-aluminum alloy, the material of said conductors comprises a nickel-iron-chromium alloy, the material of said sheath also comprises a nickel-iron-chromium alloy, and said powder material is magnesium oxide in powder form.
Claim 5
Dependent Claim
47 words
A sensor as in claim 2 and in which the material of said coil comprises a nickel-maganese-aluminum alloy, the material of said conductors comprises a nickel-iron-chromium alloy, the material of said sheath also comprises a nickel-iron-chromium alloy, and said powder material is magnesium oxide in powder form.
Claim 6
Dependent Claim
33 words
A sensor as in claim 1 and in which said sheath is electrically connected to one of said conductors by crimping the sheath about such conductor adjacent said second end of the conductor.
Claim 7
Dependent Claim
33 words
A sensor as in claim 2 and in which said sheath is electrically connected to one of said conductors by crimping the sheath about such conductor adjacent said second end of the conductor.
Claim 8
Dependent Claim
33 words
A sensor as in claim 3 and in which said sheath is electrically connected to one of said conductors by crimping the sheath about such conductor adjacent said second end of the conductor.
Claim 9
Dependent Claim
33 words
A sensor as in claim 4 and in which said sheath is electrically connected to one of said conductors by crimping the sheath about such conductor adjacent said second end of the conductor.
Claim 10
Dependent Claim
286 words
An electrical resistant responsive temperature sensor comprising; A. a relatively elongate helically wound coil of wire of a high temperature resistant material having a relatively high temperature coefficient of electrical resistance; B. first and second elongate conductors of a high temperature oxidation resistant material having high electrical conductivity, first ends of said first and second conductors electrically connected to first and second ends of said coil, respectively, so that the conductors are substantially in alignment with the length of the coil; C. a relatively elongate sheath of a high temperature oxidation resistant material having high thermal conductivity, said sheath including a wall having at least one flat outer side and whose inner surface defines the outer limits of a hollow embodied in such sheath and extending longitudinally therethrough, such sheath surrounding said coil and portions of said conductors with said inner surface of said wall spaced from said coil and conductors for substantially the full length of the sheath and with at least one of said conductors extending out of the corresponding end of the sheath for a selected distance therebeyond; D. a powder of an electrical insulating refractory material having relatively high thermal conductivity and compacted in said sheath in a surrounding relationship with said coil and conductors for substantially the full length of the sheath; and E. means for making first and second electrical connections to said first and second cOnductors respectively; whereby, F. when said sensor is disposed with said flat side of said sheath in physical contact with a surface of a radiant heated cooking sheet, the electrical resistivity of said coil varies in first and second directions accordingly as the temperature of said sheet varies in first and second directions, respectively.
Claim 11
Dependent Claim
286 words
An electrical resistant responsive temperature sensor comprising; A. a relatively elongate helically wound coil of wire of a high temperature resistant material having a relatively high temperature coefficient of electrical resistance; B. first and second elongate conductors of a high temperature oxidation resistant material having high electrical conductivity, first ends of said first and second conductors electrically connected to first and second ends of said coil, respectively, so that the conductors are substantially in alignment with the length of the coil; C. a relatively elongate sheath of a high temperature oxidation resistant material having high thermal conductivity, said sheath including a wall having at least one flat outer side and whose inner surface defines the outer limits of a hollow embodied in such sheath and extending longitudinally therethrough, such sheath surrounding said coil and portions of said conductors with said inner surface of said wall spaced from said coil and conductors for substantially the full length of the sheath and with at least one of said conductors extending out of the corresponding end of the sheath for a selected distance therebeyond; D. a powder of an electrical insulating refractory material having relatively high thermal conductivity and compacted in said sheath in a surrounding relationship with said coil and conductors for substantially the full length of the sheath; and E. means for making first and second electrical connections to said first and second cOnductors respectively; whereby, F. when said sensor is disposed with said flat side of said sheath in physical contact with a surface of a radiant heated cooking sheet, the electrical resistivity of said coil varies in first and second directions accordingly as the temperature of said sheet varies in first and second directions, respectively.
Claim 12
Dependent Claim
47 words
A sensor as in claim 9 and in which the material of said coil comprises a nickel-maganese-aluminum alloy, the material of said conductors comprises a nickel-iron-chromium alloy, the material of said sheath also comprises a nickel-iron-chromium alloy, and said powder material is magnesium oxide in powder form.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |