US3815074A - Thermistor for temperature measurement - Google Patents
Thermistor for temperature measurement Download PDFInfo
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- US3815074A US3815074A US00325655A US32565573A US3815074A US 3815074 A US3815074 A US 3815074A US 00325655 A US00325655 A US 00325655A US 32565573 A US32565573 A US 32565573A US 3815074 A US3815074 A US 3815074A
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- thermistor
- thermistors
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- temperature measurement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/14—Terminals or tapping points or electrodes specially adapted for resistors; Arrangements of terminals or tapping points or electrodes on resistors
- H01C1/1413—Terminals or electrodes formed on resistive elements having negative temperature coefficient
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C17/00—Apparatus or processes specially adapted for manufacturing resistors
- H01C17/28—Apparatus or processes specially adapted for manufacturing resistors adapted for applying terminals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49082—Resistor making
- Y10T29/49085—Thermally variable
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49082—Resistor making
- Y10T29/49087—Resistor making with envelope or housing
Definitions
- ABSTRACT Thermistors for temperature measurement and method of making the same, wherein the yield in the manufacture is very high and the choice of the products can be made in the midway of the manufacture so that small-sized thermistors having little change in the resistance for the long use can be obtained inexpensibly, said thermistors being usable at a high temperature.
- a thermistor for temperature measurement which is superior in mass productivity, and capable of being manufactured inexpensively and with high yield and stably used up to a high temperature.
- Thermistors for temperature measurement are usually manufactured by sintering powdery metal oxide such as manganeseoxide, nickel oxide and cobalt oxide, and can be classified into two types, namely bead type and disc type.
- the bead type thermistor comprises two parallel thin platinum wires and a body formed by applying a slurried mass obtained by mixing the above mentioned powdery metal oxide with water, between the two parallel thin platinum wires, oscillating the mass to render it into a spherical form, drying it and sintering it at a temperature of one thousand and several hundred degrees.
- the resistance value is selected by cutting one of the two parallel platinum wires.
- the other wire ends are welded to lead lines such as Dumet wires, and the resultant system is sealed. with fused glass.
- the disc type thermistor comprises electrodes formed by applying a conductive coating material directly to the opposite sides of a disc-shaped body which is made by pressure-molding metal oxide powder and sintering it, suitable lead wires being attached to the above electrode with solder and covered thereon with an insulating coating material such as lacquer or enamel.
- An object of the invention is to provide a thermistor for temperature measurement, which eliminates the above mentioned drawbacks while retaining only the merits of the prior-art thermistors, the thennistor of which being reduced in size.
- the resistance R (ohms) of the thermistor at temperature T is given as R R, exp 8.
- R is the thermistor resistance at temperature T and B is a constant depending upon the material of the thermistor. It is very important to the individual thermistors that the changes of the resistance R and constant B are made small and the thermistor is provided with a stable property. Also, it is important that the deviations of the design values of resistance R and factor B are small. in case of manufacture of small-size thermistors for temperature measurement the labor expense is extremely high compared to the-material'cost. Therefore, in order to obtain thermistors inexpensively it is necessary to reduce the number ofmanufacturing steps and increase the output.
- the electrodes can be formed by applying a heat-resistant conducting coating material to the opposite sides of 'the plate-like body before cuttingthe plate-like body into pellets, it is possible to obtain more uniform coating of the electrode material and extremely increased production efiiciency. Further. it is readily possibleto produce extremely small disc-like thermistor bodies with a diameter of about 0.5 mm,- which has heretofore been impossible. By way of example, accordingto the invention it is possible to cut 331 pellets with a diameter of 1mm "from a large disc body with a diameter of 30 mm within 1 minute.
- the prior-art disc type thermistors in which the lead wires are soldered to the electrodes, are not stable for use in concealment with glass at high temperature.
- the lead wires are connected to the electrodes by firing with a heat-resisting conductive coating material. This connection is so sound that even if, forexample, a platinum wire having a diameter of 8/ 100 mm is connected to the thermistor electrode and pulled, only the wire will be broken, but no damage will be caused in the connecting part.
- a metallic wire such as platinum wire or Dumet wire which is capable of sealing air-tightly in the glass is used as the lead wire so that complicated processes for further connecting other lead wires may be eliminated.
- the thermistor body can 'be airtightlysealed in fused glass. Thus, it is possible to obtain an extremely stablethermistor capable of being used up to a very high temperature.
- the lead wires such as Dumet wires are connected to the electrode with the conductive coating material and then fired in an atmosphere containing oxygen, for example, in air
- the surface of the electrode will be considerably oxidized. Therefore, when such an electrode assembly with its oxidized surface is sealed in the fused glass, the thermistor body will be contaminated with the powder of the oxidation film peeled from the electrode surface, or it will be soimperfectly sealed as to impair the air-tightness.
- the firing is effected in aninert gas or reducing gas atmosphere. In thiscase, however, the thermistor is liable to be denatured so that the change in its resistance may be increased over long use. Further, the use of the lead wire free from oxidation such as platinum wire would increase the manufacturing cost andthe removal of the oxidized film by a chemical treatment would impair the thermistor body due to attachment of a chemical liquid to the body.
- the problem of oxidation is solved by simultaneously carrying out the step of fixing the lead wire with the conductive coating material and the step of sealing thermistor body within the fused glass.
- the conductive coating material is com posed of a metallic or organic component and an inorganic component such as glass.
- the organic component is mostly evaporated at the time of drying, and is almost completely expelled through evaporation and oxidation before it is treated at the firing temperature.
- the inorganic component is not evaporated before and at the time of firing.
- oxides of manganese, nickel, cobalt, etc. are mixed in a desired mixing ratio and pulverized, and the resultant powdery material is pressure molded to obtain a disc-like molding of several millimeters in diameter and about l millimeter in thickness.
- the molding is then sintered at a temperature of one thousand and several hundred degrees.
- the opposite sides of the sintered molding are lapped with a parallel lapping machine into a predetermined thickness of, for instance, 0.5 mm.
- (a material composed chiefly of gold or gold and platinum such as item No. 8115 or 7553 of Du Pont Nemours, El.
- the disc-shaped thermistor bodies of small-size'provided on their opposite sides with theelectrodes are formed.
- the thermistor bodies thus formed are subjected to inspection to chose ones of excellent quality.
- the chosen thermistor body, to which the lead wires such as Dumet wires or platinum wires are connected with the above mentioned conductive coating material, is dried at a temperature of above 100C.
- the thermistorbody is disposed in a short tube of soda glass, having a thermal expansion coefficient which exerts no bad influence on the thermistor body, and then heated through a tunnel kiln at about 800C so as to fuse the glass tube, thereby simultaneously carrying out sealing of the thermistor body and firing of the conductive coating material to which the lead wires are attached.
- the thermistor body as above mentioned can alternatively be formed by directly pressure molding the pellets having the desired diameter and thickness, sinter-' in the glass. In this case, however, there sometimes re-v sults the above mentioned impairment to the properties of the thermistor body.
- the body may be coated with glass powder and then heated.
- FIG. 1 is a vertical sectional view of a thermistor according to the invention.
- FIG. 2 is a lateral sectional view of the embodiment shown in FIG. 1.
- Electrodes 5 and 6 are formed by firing a heatresisting conductive coating material to fix it to the both surfaces of a disc-shaped thermistor body, having a diameter of less than 1 mm.
- Lead wires 2 and 3 such as Dumet wires or plutinum wires which are capable of air-tightly sealing with glass are connected at their base portions to the electrodes 5 and 6 by firing the heatresisting conductive coating material.
- the thermistor body 1, electrodes 5 and 6 and base portions of the lead wires 2 and 3 thus assembled are embedded in a glass body 4.
- the thermistor made by the invention is so high in production in the manufacturing process that the production can be improved five times as much as the connectional bead type thermistors which provided merely about 10 percent yield.
- the conventional bead-type thermistors can not make choice of the products in the mid-way of the manufacturing process, whereas according to the present invention the thermistors can be screened in the process of forming the thermistor body. In this screened state wherein the inferior-ones were removed the yield can further be improved to be more than ten times.
- the manufacturing efficiency can considerably be improved, and the thermistors which can be massproduced at lower cost can be obtained.
- the thermistor since the thermistor is embedded and sealed in the glass, it is very stable and can be used up to a very high temperature.
- a thermistor for temperature measurement comprising a disc-shaped body of sinter powdery material having a diameter of less than about 1mm, electrode coating of fired heat-resisting conductive material on both surfaces of said disc-shaped body,-and metallic wires capable of sealing with glass, the base portions of said metallic wires being connected to said electrodes with the heat-resisting conductive coating material.
- thermoistor for temperature measurement according to claim 1, wherein said thermistor body, electrodes and base portions of lead wires are embedded in a glass casing.
- thermoistor for temperature measurement according to claim 1, wherein said thermistor body, electrodesand base portions of lead wires are covered with glass.
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- Thermistors And Varistors (AREA)
Abstract
Thermistors for temperature measurement and method of making the same, wherein the yield in the manufacture is very high and the choice of the products can be made in the midway of the manufacture so that small-sized thermistors having little change in the resistance for the long use can be obtained inexpensibly, said thermistors being usable at a high temperature.
Description
United States Patent [191 Nagata 1 June 4, 1974 [54] THERMISTOR FOR TEMPERATURE 2.462.162 2/1949 Christensen et a1. 29/613 2.5475106 4/1951 Morin 338/327 X MEASUREMENT Yasushi Nagata, Urawa, Japan Shibaura Electronics Co., Ltd., Urawa, Japan Filed: Jan. 22, 1973 Appl. No.: 325,655
Inventor:
Assignee:
Foreign Application Priority Data May 2, 1972 Japan 47-43274 US. Cl 338/22 R, 29/612, 29/613 Int. Cl "01c 7/04 Field of Search 338/22, 23; 29/612, 613
References Cited UNITED STATES PATENTS 5/1942 Dearborn et a1 7. 338/327 X Primary Examiner-C. L. Albritton Attorney, Agent, or FirmWilliam J. Daniel [57] ABSTRACT Thermistors for temperature measurement and method of making the same, wherein the yield in the manufacture is very high and the choice of the products can be made in the midway of the manufacture so that small-sized thermistors having little change in the resistance for the long use can be obtained inexpensibly, said thermistors being usable at a high temperature.
3 Claims, 2 Drawing Figures THERMISTOR FOR TEMPERATURE MEASUREMENT This invention relates to thennistors for temperatur measurement.
In accordance with the invention there is provided a thermistor for temperature measurement, which is superior in mass productivity, and capable of being manufactured inexpensively and with high yield and stably used up to a high temperature.
Thermistors for temperature measurement are usually manufactured by sintering powdery metal oxide such as manganeseoxide, nickel oxide and cobalt oxide, and can be classified into two types, namely bead type and disc type. The bead type thermistor comprises two parallel thin platinum wires and a body formed by applying a slurried mass obtained by mixing the above mentioned powdery metal oxide with water, between the two parallel thin platinum wires, oscillating the mass to render it into a spherical form, drying it and sintering it at a temperature of one thousand and several hundred degrees. The resistance value is selected by cutting one of the two parallel platinum wires. The other wire ends are welded to lead lines such as Dumet wires, and the resultant system is sealed. with fused glass. This type of thermistor is stable for use at a high temperature since it is sealed with glassHowever, its manufacture is quite complicated, andthe mass productivity is inferior. Therefore, it is difficult to obtain thermistors of uniform characteristics, which leads to low yield and high'manufacturing cost. The disc type thermistor, on the other hand, comprises electrodes formed by applying a conductive coating material directly to the opposite sides of a disc-shaped body which is made by pressure-molding metal oxide powder and sintering it, suitable lead wires being attached to the above electrode with solder and covered thereon with an insulating coating material such as lacquer or enamel. With this type of thermistor, which is produced by pressure molding, the mass productivityis superior, andit is possible to obtain comparatively uniform characteristic, leadingto high-yield and low manufacturing cost. However, asthe connection between the lead wires and the electrodes is soldered and covered with the coating material. this type of thermistor cannot be used at temperatures above about l50C. Also, it lacks in stability, and its resistance is prone to great change during long use.
An object of the invention is to provide a thermistor for temperature measurement, which eliminates the above mentioned drawbacks while retaining only the merits of the prior-art thermistors, the thennistor of which being reduced in size.
The present invention shall be further explained in the following.
The resistance R (ohms) of the thermistor at temperature T (degrees in Kelvin) is given as R R, exp 8.
where R, is the thermistor resistance at temperature T and B is a constant depending upon the material of the thermistor. It is very important to the individual thermistors that the changes of the resistance R and constant B are made small and the thermistor is provided with a stable property. Also, it is important that the deviations of the design values of resistance R and factor B are small. in case of manufacture of small-size thermistors for temperature measurement the labor expense is extremely high compared to the-material'cost. Therefore, in order to obtain thermistors inexpensively it is necessary to reduce the number ofmanufacturing steps and increase the output. Besides, while it is apparent that with constant resistivity the resistance R depends upon the shape and dimensions, with fluctuations of pressure when molding the material and variations of the sintered molding shape due to moisture content, it is difficult to have uniform resistance R In accordance with the invention a large plate-like body is produced by molding and sintering, and it is then precisely finished by polishing or like means into a predetermined thickness Then, pellet-like bodies of the eventual thermistor are cut from this plate-like body by the supersonic cutting technique. Therefore, it is possible to efficiently and inexpensively manufacture thermistors having uniform characteristics with high volume. Also, as the electrodes can be formed by applying a heat-resistant conducting coating material to the opposite sides of 'the plate-like body before cuttingthe plate-like body into pellets, it is possible to obtain more uniform coating of the electrode material and extremely increased production efiiciency. Further. it is readily possibleto produce extremely small disc-like thermistor bodies with a diameter of about 0.5 mm,- which has heretofore been impossible. By way of example, accordingto the invention it is possible to cut 331 pellets with a diameter of 1mm "from a large disc body with a diameter of 30 mm within 1 minute.
The prior-art disc type thermistors, in which the lead wires are soldered to the electrodes, are not stable for use in concealment with glass at high temperature. In accordance with the invention, the lead wires are connected to the electrodes by firing with a heat-resisting conductive coating material. This connection is so sound that even if, forexample, a platinum wire having a diameter of 8/ 100 mm is connected to the thermistor electrode and pulled, only the wire will be broken, but no damage will be caused in the connecting part. F urther, according to the present invention a metallic wire such as platinum wire or Dumet wire which is capable of sealing air-tightly in the glass is used as the lead wire so that complicated processes for further connecting other lead wires may be eliminated. With the above mentioned structurethe thermistor body can 'be airtightlysealed in fused glass. Thus, it is possible to obtain an extremely stablethermistor capable of being used up to a very high temperature.
If the lead wires such as Dumet wires are connected to the electrode with the conductive coating material and then fired in an atmosphere containing oxygen, for example, in air, the surface of the electrode will be considerably oxidized. Therefore, when such an electrode assembly with its oxidized surface is sealed in the fused glass, the thermistor body will be contaminated with the powder of the oxidation film peeled from the electrode surface, or it will be soimperfectly sealed as to impair the air-tightness. In order to avoid the undesirable oxidation, the firing is effected in aninert gas or reducing gas atmosphere. In thiscase, however, the thermistor is liable to be denatured so that the change in its resistance may be increased over long use. Further, the use of the lead wire free from oxidation such as platinum wire would increase the manufacturing cost andthe removal of the oxidized film by a chemical treatment would impair the thermistor body due to attachment of a chemical liquid to the body.
ln accordance with the invention, the problem of oxidation is solved by simultaneously carrying out the step of fixing the lead wire with the conductive coating material and the step of sealing thermistor body within the fused glass. The conductive coating material is com posed of a metallic or organic component and an inorganic component such as glass. The organic component is mostly evaporated at the time of drying, and is almost completely expelled through evaporation and oxidation before it is treated at the firing temperature. Also, the inorganic component is not evaporated before and at the time of firing. Thus, by simultaneously carrying out firing and sealing, the thermistor characteristics will not be affected by these steps at all, and it is possible to improve production efficiency.
In one embodiment of the method according to the invention, oxides of manganese, nickel, cobalt, etc. are mixed in a desired mixing ratio and pulverized, and the resultant powdery material is pressure molded to obtain a disc-like molding of several millimeters in diameter and about l millimeter in thickness. The molding is then sintered at a temperature of one thousand and several hundred degrees. Then, the opposite sides of the sintered molding are lapped with a parallel lapping machine into a predetermined thickness of, for instance, 0.5 mm. Then, (a material composed chiefly of gold or gold and platinum such as item No. 8115 or 7553 of Du Pont Nemours, El. & Company) is applied to the opposite sides of the disc and fired at a temperature of 900 to l,000C to form the electrode. The resultant disc, is then bonded to a glass plate or the like by an adhesive, and then several hundreds of pellets with a diameter of, for instance, l mm are simultaneously stamped from the disc by a ultrasonic wave means. Thus, the disc-shaped thermistor bodies of small-size'provided on their opposite sides with theelectrodes are formed. The thermistor bodies thus formed are subjected to inspection to chose ones of excellent quality. The chosen thermistor body, to which the lead wires such as Dumet wires or platinum wires are connected with the above mentioned conductive coating material, is dried at a temperature of above 100C. Thereafter, the thermistorbody is disposed in a short tube of soda glass, having a thermal expansion coefficient which exerts no bad influence on the thermistor body, and then heated through a tunnel kiln at about 800C so as to fuse the glass tube, thereby simultaneously carrying out sealing of the thermistor body and firing of the conductive coating material to which the lead wires are attached.
The thermistor body as above mentioned can alternatively be formed by directly pressure molding the pellets having the desired diameter and thickness, sinter-' in the glass. In this case, however, there sometimes re-v sults the above mentioned impairment to the properties of the thermistor body. As an alternative for sealing the thermistor body in the fused glass, the body may be coated with glass powder and then heated.
Now, the present invention shall be described with reference to the accompany drawings, in which, FIG. 1 is a vertical sectional view of a thermistor according to the invention; and
FIG. 2 is a lateral sectional view of the embodiment shown in FIG. 1.
The thermistor made by the invention is so high in production in the manufacturing process that the production can be improved five times as much as the connectional bead type thermistors which provided merely about 10 percent yield. In addition to the above, the conventional bead-type thermistors can not make choice of the products in the mid-way of the manufacturing process, whereas according to the present invention the thermistors can be screened in the process of forming the thermistor body. In this screened state wherein the inferior-ones were removed the yield can further be improved to be more than ten times. Further, while it has heretofore been impossible to manufacture disc-type thennistors with a diameter of less than 2 mm, whereas, according to the invention it is readily possible to obtain thermistors with a diameter of about 0.5 mm. Furthermore, while the yield in case of the prior-art disc-type thermistors with a diameter of 2 mm has been about 50 percent, according to the invention it is readily possible to achieve a yield above percent for thermistors with a diameter of 2 mm. Still further, experimental results regarding the resistance change during long use at working temperatures of C, 200C and 300C are respectively lower than 0.1 percent, 0.2 percent and 0.3 percent, the values of which are substantially the same as those of the priorart bead type thermistors. Thus, according to the invention the manufacturing efficiency can considerably be improved, and the thermistors which can be massproduced at lower cost can be obtained. Besides, since the thermistor is embedded and sealed in the glass, it is very stable and can be used up to a very high temperature.
What is claimed is:
l. A thermistor for temperature measurement comprising a disc-shaped body of sinter powdery material having a diameter of less than about 1mm, electrode coating of fired heat-resisting conductive material on both surfaces of said disc-shaped body,-and metallic wires capable of sealing with glass, the base portions of said metallic wires being connected to said electrodes with the heat-resisting conductive coating material.
2. The thermistor for temperature measurement according to claim 1, wherein said thermistor body, electrodes and base portions of lead wires are embedded in a glass casing.
3. The thermistor for temperature measurement according to claim 1, wherein said thermistor body, electrodesand base portions of lead wires are covered with glass.
Claims (3)
1. A thermistor for temperature measurement comprising a discshaped body of sinter powdery material having a diameter of less than about 1 mm, electrode coating of fired heat-resisting conductive material on both surfaces of said disc-shaped body, and metallic wires capable of sealing with glass, the base portions of said metallic wires being connected to said electrodes with the heat-resisting conductive coating material.
2. The thermistor for temperature measurement according to claim 1, wherein said thermistor body, electrodes and base portions of lead wires are embedded in a glass casing.
3. The thermistor for temperature measurement according to claim 1, wherein said thermistor body, electrodes and base portions of lead wires are covered with glass.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP47043274A JPS527535B2 (en) | 1972-05-02 | 1972-05-02 |
Publications (1)
Publication Number | Publication Date |
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US3815074A true US3815074A (en) | 1974-06-04 |
Family
ID=12659227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US00325655A Expired - Lifetime US3815074A (en) | 1972-05-02 | 1973-01-22 | Thermistor for temperature measurement |
Country Status (9)
Country | Link |
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US (1) | US3815074A (en) |
JP (1) | JPS527535B2 (en) |
CA (1) | CA962370A (en) |
CH (1) | CH562515A5 (en) |
DE (1) | DE2321715C2 (en) |
FR (1) | FR2183119B1 (en) |
GB (1) | GB1375685A (en) |
IT (1) | IT988177B (en) |
NL (1) | NL7306015A (en) |
Cited By (18)
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US4232441A (en) * | 1978-06-29 | 1980-11-11 | Ford Motor Company | Method for preparing rare earth or yttrium, transition metal oxide thermistors |
US4317367A (en) * | 1977-03-18 | 1982-03-02 | Milton Schonberger | Fever thermometer, or the like sensor |
US4445109A (en) * | 1981-02-11 | 1984-04-24 | Nippondenso Co., Ltd. | Temperature sensing device |
US4447799A (en) * | 1981-01-30 | 1984-05-08 | General Electric Company | High temperature thermistor and method of assembling the same |
US4712085A (en) * | 1984-10-30 | 1987-12-08 | Tdk Corporation | Thermistor element and method of manufacturing the same |
FR2822542A1 (en) * | 2001-03-23 | 2002-09-27 | Denso Corp | Temperature sensor in exhaust gas system of vehicle, has thermistor element which is separated from metal enclosure by predetermined distance |
US20030128098A1 (en) * | 2001-01-26 | 2003-07-10 | Lavenuta Gregg J. | Thermistor and method of manufacture |
CN103792019A (en) * | 2014-01-28 | 2014-05-14 | 南京时恒电子科技有限公司 | Method for manufacturing temperature sensor |
EP2779178A1 (en) * | 2013-03-12 | 2014-09-17 | NGK Spark Plug Co., Ltd. | Thermistor Element, Temperature Sensor, and Method for Manufacturing the Thermistor Element |
US20150308903A1 (en) * | 2014-04-25 | 2015-10-29 | Lattron Co., Ltd. | Temperature Sensor Element |
CN105890794A (en) * | 2016-06-02 | 2016-08-24 | 句容市博远电子有限公司 | Integrated encapsulating and potting device for sensor and operation method thereof |
CN106092364A (en) * | 2016-05-26 | 2016-11-09 | 句容市博远电子有限公司 | NTC temperature sensor inserted sheet process units and method |
US20170268935A1 (en) * | 2014-08-21 | 2017-09-21 | Shenzhen Minjie Electronic Technology Co., Ltd. | Heat radiation-resistant ntc temperature sensors and applications thereof |
US10072987B2 (en) | 2014-07-31 | 2018-09-11 | Denso Corporation | Temperature sensor |
US20190265108A1 (en) * | 2017-03-16 | 2019-08-29 | Shibaura Electronics Co., Ltd. | Temperature sensor |
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US10534331B2 (en) | 2013-12-11 | 2020-01-14 | Ademco Inc. | Building automation system with geo-fencing |
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JPS5638042B2 (en) * | 1974-03-07 | 1981-09-03 | ||
JPS5512402Y2 (en) * | 1974-06-12 | 1980-03-18 | ||
JPS51146342U (en) * | 1975-05-19 | 1976-11-24 | ||
FR2348550A1 (en) * | 1976-04-16 | 1977-11-10 | Saunier Duval | Temp. sensing thermistor electric insulation - uses electrically insulating mesh sleeve to house thermistor to provide simultaneous heat contact and electrical insulation |
JPS6121895Y2 (en) * | 1977-06-01 | 1986-07-01 | ||
JPS62285401A (en) * | 1986-06-02 | 1987-12-11 | 株式会社村田製作所 | Manufacture of thermistor |
JPS6359302U (en) * | 1986-10-07 | 1988-04-20 | ||
DE3733193C1 (en) * | 1987-10-01 | 1988-11-24 | Bosch Gmbh Robert | NTC temperature sensor and process for the production of NTC temperature sensor elements |
JPH02158102A (en) * | 1988-12-12 | 1990-06-18 | Matsushita Electric Ind Co Ltd | Glass-sealed type thermistor |
JPH0582004U (en) * | 1992-04-06 | 1993-11-05 | 株式会社小松製作所 | Thermistor element |
TW463184B (en) | 1999-04-09 | 2001-11-11 | Murata Manufacturing Co | Temperature sensor, method of producing same and method of mounting same to a circuit board |
US10895883B2 (en) | 2016-08-26 | 2021-01-19 | Ademco Inc. | HVAC controller with a temperature sensor mounted on a flex circuit |
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US2282944A (en) * | 1940-05-23 | 1942-05-12 | Bell Telephone Labor Inc | Resistance composition and method of making it |
US2462162A (en) * | 1944-07-03 | 1949-02-22 | Bell Telephone Labor Inc | Metallic oxide resistor |
US2547406A (en) * | 1947-05-08 | 1951-04-03 | Bell Telephone Labor Inc | Method and means for controlling the resistance of oxidic semiconductors |
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GB874882A (en) * | 1959-06-05 | 1961-08-10 | Standard Telephones Cables Ltd | Thermistors |
BE586067A (en) * | 1959-12-28 | 1960-01-15 | ||
AT237111B (en) * | 1961-12-27 | 1964-11-25 | Elettronica Metal Lux S P A | Process for the production of flat electrical switching elements |
US3305821A (en) * | 1963-10-03 | 1967-02-21 | Corning Glass Works | Glass-sealed electrical resistor |
DE2031701C3 (en) * | 1970-06-26 | 1974-01-03 | Danfoss A/S, Nordborg (Daenemark) | Thermistor |
US3767597A (en) * | 1970-07-15 | 1973-10-23 | Matsushita Electric Ind Co Ltd | High temperature thermistor composition |
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1972
- 1972-05-02 JP JP47043274A patent/JPS527535B2/ja not_active Expired
-
1973
- 1973-01-22 US US00325655A patent/US3815074A/en not_active Expired - Lifetime
- 1973-01-29 CA CA162,308A patent/CA962370A/en not_active Expired
- 1973-04-28 DE DE2321715A patent/DE2321715C2/en not_active Expired
- 1973-04-30 GB GB2044373A patent/GB1375685A/en not_active Expired
- 1973-05-01 NL NL7306015A patent/NL7306015A/xx active Search and Examination
- 1973-05-02 FR FR7315636A patent/FR2183119B1/fr not_active Expired
- 1973-05-02 CH CH624373A patent/CH562515A5/xx not_active IP Right Cessation
- 1973-05-11 IT IT49907/73A patent/IT988177B/en active
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US2282944A (en) * | 1940-05-23 | 1942-05-12 | Bell Telephone Labor Inc | Resistance composition and method of making it |
US2462162A (en) * | 1944-07-03 | 1949-02-22 | Bell Telephone Labor Inc | Metallic oxide resistor |
US2547406A (en) * | 1947-05-08 | 1951-04-03 | Bell Telephone Labor Inc | Method and means for controlling the resistance of oxidic semiconductors |
Cited By (33)
Publication number | Priority date | Publication date | Assignee | Title |
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US4317367A (en) * | 1977-03-18 | 1982-03-02 | Milton Schonberger | Fever thermometer, or the like sensor |
US4232441A (en) * | 1978-06-29 | 1980-11-11 | Ford Motor Company | Method for preparing rare earth or yttrium, transition metal oxide thermistors |
US4447799A (en) * | 1981-01-30 | 1984-05-08 | General Electric Company | High temperature thermistor and method of assembling the same |
US4445109A (en) * | 1981-02-11 | 1984-04-24 | Nippondenso Co., Ltd. | Temperature sensing device |
US4712085A (en) * | 1984-10-30 | 1987-12-08 | Tdk Corporation | Thermistor element and method of manufacturing the same |
US8373535B2 (en) | 2001-01-26 | 2013-02-12 | Quality Thermistor, Inc. | Thermistor and method of manufacture |
US20030128098A1 (en) * | 2001-01-26 | 2003-07-10 | Lavenuta Gregg J. | Thermistor and method of manufacture |
US6660554B2 (en) | 2001-01-26 | 2003-12-09 | Gregg J. Lavenuta | Thermistor and method of manufacture |
US6880969B2 (en) | 2001-03-23 | 2005-04-19 | Denso Corporation | Temperature sensor and production method thereof |
FR2822542A1 (en) * | 2001-03-23 | 2002-09-27 | Denso Corp | Temperature sensor in exhaust gas system of vehicle, has thermistor element which is separated from metal enclosure by predetermined distance |
EP2779178A1 (en) * | 2013-03-12 | 2014-09-17 | NGK Spark Plug Co., Ltd. | Thermistor Element, Temperature Sensor, and Method for Manufacturing the Thermistor Element |
EP2985767A1 (en) * | 2013-03-12 | 2016-02-17 | NGK Spark Plug Co., Ltd. | Thermistor element and temperature sensor comprising the thermistor element |
US9312054B2 (en) | 2013-03-12 | 2016-04-12 | Ngk Spark Plug Co., Ltd. | Thermistor element, temperature sensor, and method for manufacturing the thermistor element |
US10649418B2 (en) | 2013-12-11 | 2020-05-12 | Ademco Inc. | Building automation controller with configurable audio/visual cues |
US10534331B2 (en) | 2013-12-11 | 2020-01-14 | Ademco Inc. | Building automation system with geo-fencing |
US10591877B2 (en) | 2013-12-11 | 2020-03-17 | Ademco Inc. | Building automation remote control device with an in-application tour |
US10768589B2 (en) | 2013-12-11 | 2020-09-08 | Ademco Inc. | Building automation system with geo-fencing |
US10712718B2 (en) | 2013-12-11 | 2020-07-14 | Ademco Inc. | Building automation remote control device with in-application messaging |
CN103792019A (en) * | 2014-01-28 | 2014-05-14 | 南京时恒电子科技有限公司 | Method for manufacturing temperature sensor |
CN103792019B (en) * | 2014-01-28 | 2016-06-29 | 南京时恒电子科技有限公司 | A kind of manufacturing method of temperature sensor |
US9829391B2 (en) * | 2014-04-25 | 2017-11-28 | Lattron Co., Ltd. | Temperature sensor element |
US20150308903A1 (en) * | 2014-04-25 | 2015-10-29 | Lattron Co., Ltd. | Temperature Sensor Element |
US10072987B2 (en) | 2014-07-31 | 2018-09-11 | Denso Corporation | Temperature sensor |
US10488271B2 (en) * | 2014-08-21 | 2019-11-26 | Shenzhen Minjie Electronic Technology Co., Ltd. | Heat radiation-resistant NTC temperature sensors and applications thereof |
US20170268935A1 (en) * | 2014-08-21 | 2017-09-21 | Shenzhen Minjie Electronic Technology Co., Ltd. | Heat radiation-resistant ntc temperature sensors and applications thereof |
US11428585B2 (en) | 2014-08-21 | 2022-08-30 | Shenzhen Minjie Electronic Technology Co., Ltd. | Heat radiation-resistant NTC temperature sensors and applications thereof |
CN106092364B (en) * | 2016-05-26 | 2019-05-17 | 句容市博远电子有限公司 | NTC temperature sensor inserted sheet process units and method |
CN106092364A (en) * | 2016-05-26 | 2016-11-09 | 句容市博远电子有限公司 | NTC temperature sensor inserted sheet process units and method |
CN105890794A (en) * | 2016-06-02 | 2016-08-24 | 句容市博远电子有限公司 | Integrated encapsulating and potting device for sensor and operation method thereof |
US10488062B2 (en) | 2016-07-22 | 2019-11-26 | Ademco Inc. | Geofence plus schedule for a building controller |
US20190265108A1 (en) * | 2017-03-16 | 2019-08-29 | Shibaura Electronics Co., Ltd. | Temperature sensor |
US10935434B2 (en) * | 2017-03-16 | 2021-03-02 | Shibaura Electronics Co., Ltd. | Temperature sensor |
CN111021042A (en) * | 2018-10-10 | 2020-04-17 | 江苏昆仑光源材料有限公司 | Dual-frequency program-controlled power supply integrated differential method dumet wire production process system |
Also Published As
Publication number | Publication date |
---|---|
JPS494149A (en) | 1974-01-14 |
JPS527535B2 (en) | 1977-03-03 |
DE2321715A1 (en) | 1973-11-15 |
IT988177B (en) | 1975-04-10 |
NL7306015A (en) | 1973-11-06 |
CH562515A5 (en) | 1975-05-30 |
GB1375685A (en) | 1974-11-27 |
FR2183119A1 (en) | 1973-12-14 |
FR2183119B1 (en) | 1978-03-10 |
CA962370A (en) | 1975-02-04 |
DE2321715C2 (en) | 1983-01-13 |
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