FR551210A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR551210A
FR551210A FR551210DA FR551210A FR 551210 A FR551210 A FR 551210A FR 551210D A FR551210D A FR 551210DA FR 551210 A FR551210 A FR 551210A
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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 FR551210A publication Critical patent/FR551210A/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
FR551210D 1922-05-10 1922-05-10 Improvements to telephone systems Expired FR551210A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR551210T 1922-05-10

Publications (1)

Publication Number Publication Date
FR551210A true FR551210A (en) 1923-03-30

Family

ID=8936693

Family Applications (1)

Application Number Title Priority Date Filing Date
FR551210D Expired FR551210A (en) 1922-05-10 1922-05-10 Improvements to telephone systems

Country Status (1)

Country Link
FR (1) FR551210A (en)

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