FR551211A - Improvements to telephone devices - Google Patents

Improvements to telephone devices

Info

Publication number
FR551211A
FR551211A FR551211DA FR551211A FR 551211 A FR551211 A FR 551211A FR 551211D A FR551211D A FR 551211DA FR 551211 A FR551211 A FR 551211A
Authority
FR
France
Prior art keywords
telephone devices
telephone
devices
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
Other languages
French (fr)
Inventor
Henry Spottswood Conrad
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 filed Critical
Application granted granted Critical
Publication of FR551211A publication Critical patent/FR551211A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/16—Driving arrangements for multi-position wipers
    • H01H63/24—Driving arrangements for multi-position wipers with continuous motion of wiper until a selected position is reached
    • H01H63/28—Driving arrangements for multi-position wipers with continuous motion of wiper until a selected position is reached with an individual motor for each selector switch
    • H01H63/30—Pneumatic motor for moving wiper to selected position
FR551211D 1922-05-10 1922-05-10 Improvements to telephone devices Expired FR551211A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR551211T 1922-05-10

Publications (1)

Publication Number Publication Date
FR551211A true FR551211A (en) 1923-03-30

Family

ID=8936694

Family Applications (1)

Application Number Title Priority Date Filing Date
FR551211D Expired FR551211A (en) 1922-05-10 1922-05-10 Improvements to telephone devices

Country Status (1)

Country Link
FR (1) FR551211A (en)

Similar Documents

Publication Publication Date Title
FR563876A (en) Improvements to tabulating devices
FR561429A (en) Improvements to telephone cables
FR564040A (en) Improvements to portable view projection devices
FR551211A (en) Improvements to telephone devices
FR571112A (en) Improvements to thermo-ionic devices
FR576443A (en) Improvements to telephone devices
FR27359E (en) Improvements to receiving telephone devices
FR571025A (en) Improvements to telephone receiving devices
FR550459A (en) Improvements to printing telegraph devices
FR559122A (en) Improvements to intercom telephone devices
FR27416E (en) Improvements to stereo-panoramic devices
FR588543A (en) Improvements to telephone receivers
FR27536E (en) Improvements to projection devices
FR584062A (en) Improvements to telephone devices
FR544368A (en) Improvements to brushcutting devices
FR573076A (en) Improvements to telegraph receiving devices
FR585125A (en) Improvements to telephone headsets
FR583697A (en) Improvements to telephone circuits
FR557899A (en) Improvements to thermionic devices
FR27053E (en) Improvements to cinematographic devices
FR557269A (en) Improvements to cinematographic devices
FR26485E (en) Improvements to spraying devices
FR26677E (en) Improvements to telephone receivers
FR565744A (en) Improvements to telephone receivers
FR558318A (en) Improvements to telephone receivers