FR456639A - Système de signaux à double contact - Google Patents

Système de signaux à double contact

Info

Publication number
FR456639A
FR456639A FR456639DA FR456639A FR 456639 A FR456639 A FR 456639A FR 456639D A FR456639D A FR 456639DA FR 456639 A FR456639 A FR 456639A
Authority
FR
France
Prior art keywords
signal system
contact signal
double contact
double
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
English (en)
Inventor
Wilhelm Rausch
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 FR456639A publication Critical patent/FR456639A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/16—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/30—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school
    • G04C21/32—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times with provision for a number of operations at different times, e.g. ringing the bells in a school giving indications at a number of places each at a different time, e.g. system of alarms in a hotel

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR456639D 1913-03-14 1913-04-14 Système de signaux à double contact Expired FR456639A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE456639X 1913-03-14

Publications (1)

Publication Number Publication Date
FR456639A true FR456639A (fr) 1913-09-01

Family

ID=1496411

Family Applications (1)

Application Number Title Priority Date Filing Date
FR456639D Expired FR456639A (fr) 1913-03-14 1913-04-14 Système de signaux à double contact

Country Status (1)

Country Link
FR (1) FR456639A (fr)

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