GB463096A - Improvements in the manufacture of electric resistances - Google Patents

Improvements in the manufacture of electric resistances

Info

Publication number
GB463096A
GB463096A GB403936A GB403936A GB463096A GB 463096 A GB463096 A GB 463096A GB 403936 A GB403936 A GB 403936A GB 403936 A GB403936 A GB 403936A GB 463096 A GB463096 A GB 463096A
Authority
GB
United Kingdom
Prior art keywords
oxide
oxides
coefficient
cadmium
lead monoxide
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
GB403936A
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.)
ALFRED DOTTERWEICH
Original Assignee
ALFRED DOTTERWEICH
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 ALFRED DOTTERWEICH filed Critical ALFRED DOTTERWEICH
Priority to GB403936A priority Critical patent/GB463096A/en
Publication of GB463096A publication Critical patent/GB463096A/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
    • H01C7/042—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 mainly consisting of inorganic non-metallic substances
    • H01C7/043—Oxides or oxidic compounds

Abstract

An electric resistance consists of two or more heat-refractory heavy metal oxides having space-lattices of different types with substantially different spacing of the atoms or molecules, excluding the rare earth metal oxides and zirconium oxide, the oxides being intimately united by melting or sintering. By "heavy metals" are meant metals heavier than aluminium. It is stated that the resistance so produced has at room temperature a specific resistance higher than that of any of the oxides taken separately. The value of the temperature coefficient of the composition may be controlled, e.g. by mixing an oxide having a positive coefficient, e.g. cadmium oxide, with an oxide having a negative coefficient. In examples, the following combinations are used: (1) equal proportions of cadmium oxide and ferroso-ferric oxide, sintered at about 1300 DEG C.; (2) copper oxides plus bismuth oxide, Bi2O3; (3) cadmium oxide, chromium oxide and lead monoxide, the lead monoxide being a flux which may be partly or wholly removed in the burning. Specifications 165,051, 165,052, and 179,928, [all in Class 22], are referred to. The Specification as open to inspection under Sect. 91 refers to the use of copper chromate instead of an oxide. This subject-matter does not appear in the Specification as accepted.
GB403936A 1936-09-29 1936-09-29 Improvements in the manufacture of electric resistances Expired GB463096A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB403936A GB463096A (en) 1936-09-29 1936-09-29 Improvements in the manufacture of electric resistances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB403936A GB463096A (en) 1936-09-29 1936-09-29 Improvements in the manufacture of electric resistances

Publications (1)

Publication Number Publication Date
GB463096A true GB463096A (en) 1937-03-22

Family

ID=9769576

Family Applications (1)

Application Number Title Priority Date Filing Date
GB403936A Expired GB463096A (en) 1936-09-29 1936-09-29 Improvements in the manufacture of electric resistances

Country Status (1)

Country Link
GB (1) GB463096A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528113A (en) * 1946-10-18 1950-10-31 Rca Corp Single unit capacitor and resistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2528113A (en) * 1946-10-18 1950-10-31 Rca Corp Single unit capacitor and resistor

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