FR520838A - Improvements in signaling devices - Google Patents

Improvements in signaling devices

Info

Publication number
FR520838A
FR520838A FR520838A FR520838DA FR520838A FR 520838 A FR520838 A FR 520838A FR 520838 A FR520838 A FR 520838A FR 520838D A FR520838D A FR 520838DA FR 520838 A FR520838 A FR 520838A
Authority
FR
France
Prior art keywords
signaling devices
signaling
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
FR520838A
Other languages
French (fr)
Inventor
Serge Oulianine
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
Application granted granted Critical
Publication of FR520838A publication Critical patent/FR520838A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/30—Electromagnetic relays specially adapted for actuation by ac
    • H01H51/32—Frequency relays; Mechanically-tuned relays

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
FR520838A 1919-01-29 1920-07-21 Improvements in signaling devices Expired FR520838A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB520838X 1919-01-29

Publications (1)

Publication Number Publication Date
FR520838A true FR520838A (en) 1921-07-02

Family

ID=10462570

Family Applications (1)

Application Number Title Priority Date Filing Date
FR520838A Expired FR520838A (en) 1919-01-29 1920-07-21 Improvements in signaling devices

Country Status (1)

Country Link
FR (1) FR520838A (en)

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