GB541922A - Resistor devices and methods of making same - Google Patents

Resistor devices and methods of making same

Info

Publication number
GB541922A
GB541922A GB12059/40A GB1205940A GB541922A GB 541922 A GB541922 A GB 541922A GB 12059/40 A GB12059/40 A GB 12059/40A GB 1205940 A GB1205940 A GB 1205940A GB 541922 A GB541922 A GB 541922A
Authority
GB
United Kingdom
Prior art keywords
borate
resistor
heated
coated
bead
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
GB12059/40A
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
Publication of GB541922A publication Critical patent/GB541922A/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
    • H01C7/001—Mass resistors
    • 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

Abstract

541,922. Resistors. STANDARD TELEPHONES & CABLES, Ltd. July 23, 1940, No. 12059. Convention date, July 25, 1939. [Class 39 (iii)] A resistor unit comprises a bead 10 of semiconductive material with embedded conductors 11, which is inserted in a glass tube and heated to 700‹-900‹C. until the glass fuses around the bead forming a solid rod 12. A heater coil 13 is placed around the rod, coated with a mixture of sodium borate 65 per cent. and aluminium oxide 35 per cent., or equal quantities of lithium and potassium borates, and the assembly heated to 700‹C. whereby the coil 13 is embedded in the cement 14. The unit may be enclosed in an evacuated glass bulb. In a modification, a resistor bead is coated with zinc or potassium borate which is fused by heating to 700‹-900‹C. The mass is inserted in a heater coil; again coated with metal borate, and heated to fuse the borate. The resistor may comprise finely divided mixtures of the oxides of nickel, manganese, and cobalt which are heat-treated according to the resistance properties desired.
GB12059/40A 1939-07-25 1940-07-23 Resistor devices and methods of making same Expired GB541922A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US286307A US2280257A (en) 1939-07-25 1939-07-25 Resistor device and method of making the same

Publications (1)

Publication Number Publication Date
GB541922A true GB541922A (en) 1941-12-17

Family

ID=23098001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12059/40A Expired GB541922A (en) 1939-07-25 1940-07-23 Resistor devices and methods of making same

Country Status (3)

Country Link
US (1) US2280257A (en)
FR (1) FR931192A (en)
GB (1) GB541922A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2462162A (en) * 1944-07-03 1949-02-22 Bell Telephone Labor Inc Metallic oxide resistor
US2463805A (en) * 1944-11-10 1949-03-08 Bendix Aviat Corp Control device
US2569714A (en) * 1945-03-12 1951-10-02 William C Gregory Strain gauge
US2481371A (en) * 1945-07-25 1949-09-06 Douglas Aircraft Co Inc High-temperature strain gauge and method of making same
US2505066A (en) * 1947-09-17 1950-04-25 Bell Telephone Labor Inc Method of making assemblies of resistor bodies
US2489409A (en) * 1947-10-29 1949-11-29 Bell Telephone Labor Inc Resistor having distortion protected connecting means
DE1152184B (en) * 1953-05-21 1963-08-01 Siemens Ag External heated heat conductor arrangement
NL293020A (en) * 1962-10-16
US3168804A (en) * 1963-02-12 1965-02-09 Zyrotron Ind Inc Heater construction and method of making same
US3381253A (en) * 1966-03-04 1968-04-30 Victory Engineering Corp High speed wide range surface sensor thermistor
US3721902A (en) * 1970-03-10 1973-03-20 W Burks Thermal sensing of current carrying mediums

Also Published As

Publication number Publication date
FR931192A (en) 1948-02-16
US2280257A (en) 1942-04-21

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