GB233513A - Variable electrical resistance - Google Patents

Variable electrical resistance

Info

Publication number
GB233513A
GB233513A GB1064424A GB1064424A GB233513A GB 233513 A GB233513 A GB 233513A GB 1064424 A GB1064424 A GB 1064424A GB 1064424 A GB1064424 A GB 1064424A GB 233513 A GB233513 A GB 233513A
Authority
GB
United Kingdom
Prior art keywords
resistances
concentric
contact
spindle
resistance
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
GB1064424A
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.)
FRED BATES
WILFRED DOODSON NORBURY
Ericsson Telephones Ltd
Original Assignee
FRED BATES
WILFRED DOODSON NORBURY
Ericsson Telephones Ltd
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 FRED BATES, WILFRED DOODSON NORBURY, Ericsson Telephones Ltd filed Critical FRED BATES
Priority to GB1064424A priority Critical patent/GB233513A/en
Publication of GB233513A publication Critical patent/GB233513A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/16—Adjustable resistors including plural resistive elements
    • H01C10/18—Adjustable resistors including plural resistive elements including coarse and fine resistive elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

233,513. British L.M. Ericsson Manufacturing Co., Ltd., Norbury, W. D., and Bates, F. April 30, 1924. Variable resistances. - Two or more separate resistances have one or more contacting arms rotating with the main control handle and adapted to be thrown into or out of engagement by one or more concentric spindles passing through the main spindle. As shown, two resistances A, B of different values are wound on strip formers and mounted in concentric grooves in an insulating base. Contact is made with the resistances A, B by the long and short arms respectively of a U-shaped spring C mounted on a hollow spindle controlled by the main knob. The longer arm of the spring C is adapted to be lifted out of contact with the resistance A by means of a concentric spindle D having a screw-thread F and operable by an auxiliary knob E. By this means either the resistances A, B in parallel or the resistance B alone are connected in the controlled circuit, for example that of a valve filament. Alternatively the contact arms may move over studs connected to the resistances, these studs being arranged in concentric circles, or one set may be mounted face to face with the other set.
GB1064424A 1924-04-30 1924-04-30 Variable electrical resistance Expired GB233513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1064424A GB233513A (en) 1924-04-30 1924-04-30 Variable electrical resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1064424A GB233513A (en) 1924-04-30 1924-04-30 Variable electrical resistance

Publications (1)

Publication Number Publication Date
GB233513A true GB233513A (en) 1925-05-14

Family

ID=9971629

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1064424A Expired GB233513A (en) 1924-04-30 1924-04-30 Variable electrical resistance

Country Status (1)

Country Link
GB (1) GB233513A (en)

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