GB663727A - Improvements in or relating to apparatus for detecting radiant energy - Google Patents

Improvements in or relating to apparatus for detecting radiant energy

Info

Publication number
GB663727A
GB663727A GB28430/47A GB2843047A GB663727A GB 663727 A GB663727 A GB 663727A GB 28430/47 A GB28430/47 A GB 28430/47A GB 2843047 A GB2843047 A GB 2843047A GB 663727 A GB663727 A GB 663727A
Authority
GB
United Kingdom
Prior art keywords
dielectric
oct
peak
referred
temperature
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
GB28430/47A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB663727A publication Critical patent/GB663727A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/34—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using capacitative elements
    • G01K7/343—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using capacitative elements the dielectric constant of which is temperature dependant

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

663,727. Electric indicating systems. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABBIEKEN. Oct. 24, 1947. [Oct. 28, 1946] No. 28430/47. Class 40 (i). [Also in Groups XXXVI and XL (b). A material, the dielectric constant of which varies with temperature and exhibits a peak in the dieelectric constant/temperature range is used as a heat radiation detector by measuring the change in capacity of a condenser of which the material forms the dielectric. Ceramics on the basis of titanates exhibiting a Perovskite crystalline structure are referred to as suitable. The dielectric may have a thin layer of evaporated metal applied to each side which may in turn be coated with a thermal absorption material, e.g. platinum black. The formation of mixed crystals, e.g. Barium or Strontium titanate enables the peak of the dielectric constant/temperature curve to be displaced towards any desired value. Specification 574,577, [Group XXXVI], is referred to. Reference has been directed by the Comptroller to Specification 613,116.
GB28430/47A 1946-10-28 1947-10-24 Improvements in or relating to apparatus for detecting radiant energy Expired GB663727A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL663727X 1946-10-28

Publications (1)

Publication Number Publication Date
GB663727A true GB663727A (en) 1951-12-27

Family

ID=19798679

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28430/47A Expired GB663727A (en) 1946-10-28 1947-10-24 Improvements in or relating to apparatus for detecting radiant energy

Country Status (1)

Country Link
GB (1) GB663727A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294704B (en) * 1961-01-20 1969-05-08 Electronique Appliquee Arrangement for temperature-dependent triggering of electrical processes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294704B (en) * 1961-01-20 1969-05-08 Electronique Appliquee Arrangement for temperature-dependent triggering of electrical processes

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