FR53442E - Improvements to electrical alarm and signaling systems - Google Patents

Improvements to electrical alarm and signaling systems

Info

Publication number
FR53442E
FR53442E FR53442DA FR53442E FR 53442 E FR53442 E FR 53442E FR 53442D A FR53442D A FR 53442DA FR 53442 E FR53442 E FR 53442E
Authority
FR
France
Prior art keywords
signaling systems
electrical alarm
alarm
electrical
signaling
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)
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.)
EGIL
Original Assignee
EGIL
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 EGIL filed Critical EGIL
Application granted granted Critical
Publication of FR53442E publication Critical patent/FR53442E/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR53442D 1944-01-27 1944-01-27 Improvements to electrical alarm and signaling systems Expired FR53442E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR53442T 1944-01-27

Publications (1)

Publication Number Publication Date
FR53442E true FR53442E (en) 1946-01-10

Family

ID=8687992

Family Applications (1)

Application Number Title Priority Date Filing Date
FR53442D Expired FR53442E (en) 1944-01-27 1944-01-27 Improvements to electrical alarm and signaling systems

Country Status (1)

Country Link
FR (1) FR53442E (en)

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