GB647331A - Improvements in or relating to temperature dependent resistances - Google Patents

Improvements in or relating to temperature dependent resistances

Info

Publication number
GB647331A
GB647331A GB2908548A GB2908548A GB647331A GB 647331 A GB647331 A GB 647331A GB 2908548 A GB2908548 A GB 2908548A GB 2908548 A GB2908548 A GB 2908548A GB 647331 A GB647331 A GB 647331A
Authority
GB
United Kingdom
Prior art keywords
resistances
beads
liquids
elements
relating
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
Application number
GB2908548A
Inventor
Charles Trevor Daly
David Green
Stanley Carden Shepard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2908548A priority Critical patent/GB647331A/en
Publication of GB647331A publication Critical patent/GB647331A/en
Expired legal-status Critical Current

Links

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermistors And Varistors (AREA)

Abstract

647,331. Temperature variable resistances; non-metal resistances ; enclosures for resistances. STANDARD TELEPHONES & CABLES, Ltd. Nov. 9, 1948, No. 29085. Drawings to Specification. [Class 37] Thermistor elements or beads are immersed in a suitable insulating and cooling liquid to increase the rate of response to changes in heating current. The liquids .mentioned as suitable are trichloethylene and ethylene glycol and the invention is restricted to these liquids. The Specification includes test data demonstrating the improved time constants obtained for both direct and indirectly heated thermistors. It is stated that the power sensitivity is reduced in the same proportion as the time constant. The arrangement preferred is the usual glass envelope containing the bead and filled with the chosen liquid in accordance with the invention. The beads may be composed of metal oxide mixtures (e.g. as in Specification 545,679) or boron crystal or silver sulphide elements may be used. Specification 615,988 is referred to.
GB2908548A 1948-11-12 1948-11-12 Improvements in or relating to temperature dependent resistances Expired GB647331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2908548A GB647331A (en) 1948-11-12 1948-11-12 Improvements in or relating to temperature dependent resistances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2908548A GB647331A (en) 1948-11-12 1948-11-12 Improvements in or relating to temperature dependent resistances

Publications (1)

Publication Number Publication Date
GB647331A true GB647331A (en) 1950-12-13

Family

ID=10285920

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2908548A Expired GB647331A (en) 1948-11-12 1948-11-12 Improvements in or relating to temperature dependent resistances

Country Status (1)

Country Link
GB (1) GB647331A (en)

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