FR791058A - Signaling device, particularly for central call systems - Google Patents

Signaling device, particularly for central call systems

Info

Publication number
FR791058A
FR791058A FR791058DA FR791058A FR 791058 A FR791058 A FR 791058A FR 791058D A FR791058D A FR 791058DA FR 791058 A FR791058 A FR 791058A
Authority
FR
France
Prior art keywords
signaling device
call systems
central call
central
systems
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
Citterio
Vacchina
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 FR791058A publication Critical patent/FR791058A/en
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)
FR791058D 1934-06-09 1935-06-08 Signaling device, particularly for central call systems Expired FR791058A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE791058X 1934-06-09

Publications (1)

Publication Number Publication Date
FR791058A true FR791058A (en) 1935-12-02

Family

ID=6703017

Family Applications (1)

Application Number Title Priority Date Filing Date
FR791058D Expired FR791058A (en) 1934-06-09 1935-06-08 Signaling device, particularly for central call systems

Country Status (1)

Country Link
FR (1) FR791058A (en)

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