FR577005A - Improvements to automatic switches and telephones - Google Patents

Improvements to automatic switches and telephones

Info

Publication number
FR577005A
FR577005A FR577005DA FR577005A FR 577005 A FR577005 A FR 577005A FR 577005D A FR577005D A FR 577005DA FR 577005 A FR577005 A FR 577005A
Authority
FR
France
Prior art keywords
telephones
automatic switches
switches
automatic
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
David Sherrill Hulfish
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 FR577005A publication Critical patent/FR577005A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H67/00—Electrically-operated selector switches
    • H01H67/02—Multi-position wiper switches
    • H01H67/04—Multi-position wiper switches having wipers movable only in one direction for purpose of selection
    • H01H67/06—Rotary switches, i.e. having angularly movable wipers
FR577005D 1923-02-09 1924-02-09 Improvements to automatic switches and telephones Expired FR577005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577005XA 1923-02-09 1923-02-09

Publications (1)

Publication Number Publication Date
FR577005A true FR577005A (en) 1924-08-29

Family

ID=22012220

Family Applications (1)

Application Number Title Priority Date Filing Date
FR577005D Expired FR577005A (en) 1923-02-09 1924-02-09 Improvements to automatic switches and telephones

Country Status (1)

Country Link
FR (1) FR577005A (en)

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