FR342857A - Improvements in electrical signal devices - Google Patents

Improvements in electrical signal devices

Info

Publication number
FR342857A
FR342857A FR342857DA FR342857A FR 342857 A FR342857 A FR 342857A FR 342857D A FR342857D A FR 342857DA FR 342857 A FR342857 A FR 342857A
Authority
FR
France
Prior art keywords
electrical signal
signal devices
devices
electrical
signal
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
Nicolay Jacobsen
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 FR342857A publication Critical patent/FR342857A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR342857D 1903-05-07 1904-05-04 Improvements in electrical signal devices Expired FR342857A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO342857X 1903-05-07

Publications (1)

Publication Number Publication Date
FR342857A true FR342857A (en) 1904-09-20

Family

ID=1391831

Family Applications (1)

Application Number Title Priority Date Filing Date
FR342857D Expired FR342857A (en) 1903-05-07 1904-05-04 Improvements in electrical signal devices

Country Status (1)

Country Link
FR (1) FR342857A (en)

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