GB677206A - Improvements in or relating to methods for the calibration processing of an electrical element - Google Patents
Improvements in or relating to methods for the calibration processing of an electrical elementInfo
- Publication number
- GB677206A GB677206A GB21318/50A GB2131850A GB677206A GB 677206 A GB677206 A GB 677206A GB 21318/50 A GB21318/50 A GB 21318/50A GB 2131850 A GB2131850 A GB 2131850A GB 677206 A GB677206 A GB 677206A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thermistor
- galvanometer
- resistor
- resistance
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000000034 method Methods 0.000 title abstract 3
- 239000011324 bead Substances 0.000 abstract 3
- 239000011521 glass Substances 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 238000005553 drilling Methods 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 238000003672 processing method Methods 0.000 abstract 1
- 239000011253 protective coating Substances 0.000 abstract 1
- 239000000523 sample Substances 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
- 239000002966 varnish Substances 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/255—Means for correcting the capacitance value
-
- 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
- Y10T29/49004—Electrical device making including measuring or testing of device or component part
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Thermistors And Varistors (AREA)
Abstract
677,206. Temperature-variable resistances; condensers; bridge circuits. GARRETT CORPORATION. Aug. 29, 1950 [Sept. 10, 1949], No. 21318/50. Class 37. An electrical element having a critical upper temperature is calibrated by processing while the element is connected in a comparison circuit having an indicating means arranged to give a first predetermined indication when the element reaches its critical upper temperature during the processing and to give a second predetermined indication when the calibration process is completed. The processing method comprises changing the mass of the element in such a manner that the first predetermined indication is not exceeded and continuing to change the mass until the second predetermined indication is shown. The method is described as applied to adjusting a thermistor to a predetermined resistance value, but is also applicable for adjusting capacitors. A thermistor 10, Fig. 1, comprises a glass probe 11 within which are embedded a pair of conductors 12, the ends of which are embedded in a bead 13 of metallic oxide semi-conductor. A thin glass envelope 14 encloses the bead 13. The thermistor 10 and a reference thermistor 23, Fig. 3, are arranged in two arms of a Wheatstone bridge, the other two arms of which are formed by resistors 21, 22. The reference thermistor 23 is maintained at a constant temperature by immersion in a bath 24 of mercury, oil, &c. In series with the galvanometer 27 is variable resistor 28 which is shunted by a normally-open switch 29. The resistance of the thermistor is changed by grinding the end on a grinding-wheel 31 driven by a motor 32, or by removing portions of the bead 13 by drilling. With switches 26, 30 closed the resistor 28 is adjusted so that the galvanometer 27 gives a full-scale reading. The thermistor 10 is replaced by a resistor having a resistance equal to that of a standard calibrated thermistor at 300 F., and the reading of the galvanometer is noted with switches 29, 30 open, the resistor then being replaced by the thermistor 10. Grinding is then proceeded with, the galvanometer being observed during the operation. Whenever the temperature of the resistor reaches 300 F. the galvanometer gives the previously-noted reading, and the grinding is stopped to allow the thermistor to cool. The progress is checked by dipping the thermistor 10 into the bath 24 and noting the galvanometer reading. The galvanometer 27 may be calibrated to read percentage difference of resistance between the thermistors 10, 23. When the resistance of the thermistor 10 has reached its desired value it may be given a protective coating 40, Fig. 2, of varnish &c.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US114936A US2609644A (en) | 1949-09-10 | 1949-09-10 | Method of processing electrical elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB677206A true GB677206A (en) | 1952-08-13 |
Family
ID=22358358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21318/50A Expired GB677206A (en) | 1949-09-10 | 1950-08-29 | Improvements in or relating to methods for the calibration processing of an electrical element |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2609644A (en) |
| GB (1) | GB677206A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1100774B (en) * | 1958-07-01 | 1961-03-02 | Yellow Springs Instr | Method and device for the value adjustment of heat conductor resistors |
| US2970411A (en) * | 1958-07-01 | 1961-02-07 | Yellow Springs Instr | Thermistor standardizing |
| US3041868A (en) * | 1959-02-18 | 1962-07-03 | Pure Oil Co | Apparatus for testing lubricants |
| BE586067A (en) * | 1959-12-28 | 1960-01-15 | ||
| US3088254A (en) * | 1960-02-26 | 1963-05-07 | Morton S Lipkins | Spherical cutting method |
| US3324706A (en) * | 1960-06-15 | 1967-06-13 | Microdot Inc | Apparatus for temperature compensation of strain gages |
| US3371516A (en) * | 1960-06-15 | 1968-03-05 | Microdot Inc | Apparatus for adjusting the temperature coefficient of wire strain gages |
| US3249988A (en) * | 1962-02-27 | 1966-05-10 | Victory Engineering Corp | Method of covering resistor bead |
| US3109227A (en) * | 1962-11-05 | 1963-11-05 | Fenwal Electronics Inc | Uniform thermistor manufacture |
| US4533870A (en) * | 1982-11-29 | 1985-08-06 | The Boeing Company | Method for testing multi-section photo-sensitive detectors |
| JPH08241802A (en) * | 1995-03-03 | 1996-09-17 | Murata Mfg Co Ltd | Thermistor device and manufacture thereof |
| JP3624395B2 (en) * | 1999-02-15 | 2005-03-02 | 株式会社村田製作所 | Manufacturing method of chip type thermistor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1635184A (en) * | 1924-10-27 | 1927-07-12 | Lester L Jones | Manufacture of electrical resistance units |
| US1962438A (en) * | 1930-07-14 | 1934-06-12 | Technidyne Corp | Manufacture of resistors |
| US2500605A (en) * | 1945-08-04 | 1950-03-14 | Hartford Nat Bank & Trust Co | Method and device for manufacturing electric resistance bodies |
| US2427064A (en) * | 1945-08-08 | 1947-09-09 | Arthur F Moul | Temperature responsive device for use on grinders and method of grinding |
-
1949
- 1949-09-10 US US114936A patent/US2609644A/en not_active Expired - Lifetime
-
1950
- 1950-08-29 GB GB21318/50A patent/GB677206A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2609644A (en) | 1952-09-09 |
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