GB205223A - Improvements in and relating to filament resistances for thermionic valves - Google Patents

Improvements in and relating to filament resistances for thermionic valves

Info

Publication number
GB205223A
GB205223A GB1980622A GB1980622A GB205223A GB 205223 A GB205223 A GB 205223A GB 1980622 A GB1980622 A GB 1980622A GB 1980622 A GB1980622 A GB 1980622A GB 205223 A GB205223 A GB 205223A
Authority
GB
United Kingdom
Prior art keywords
wire
circuit
contact
thermionic valves
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
GB1980622A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1980622A priority Critical patent/GB205223A/en
Publication of GB205223A publication Critical patent/GB205223A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path

Abstract

205,223. Welch, A. P. July 19, 1922. Variable resistances.- A filament for thermionic valves comprises wire wound repeatedly around a former A bent to follow the movement of a rotatable brush or contact G sliding over successive turns of the wire, the two extreme positions F, E of the contact G, in which the circuit is broken or all the resistance wire cut out of circuit, being on a straight line through the axis of rotation of the contact G so that a 180‹ scale can be used. The extreme positions F, E are defined by stops C, D, the contact G leaving the wire and breaking the circuit at stop C and contacting with a metal piece H at stop D to cut all the wire out of circuit. The former A may be supported in a bracket B at the front or back of a panel.
GB1980622A 1922-07-19 1922-07-19 Improvements in and relating to filament resistances for thermionic valves Expired GB205223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1980622A GB205223A (en) 1922-07-19 1922-07-19 Improvements in and relating to filament resistances for thermionic valves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1980622A GB205223A (en) 1922-07-19 1922-07-19 Improvements in and relating to filament resistances for thermionic valves

Publications (1)

Publication Number Publication Date
GB205223A true GB205223A (en) 1923-10-18

Family

ID=10135526

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1980622A Expired GB205223A (en) 1922-07-19 1922-07-19 Improvements in and relating to filament resistances for thermionic valves

Country Status (1)

Country Link
GB (1) GB205223A (en)

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