CH69412A - Electric alarm device - Google Patents

Electric alarm device

Info

Publication number
CH69412A
CH69412A CH69412A CH69412DA CH69412A CH 69412 A CH69412 A CH 69412A CH 69412 A CH69412 A CH 69412A CH 69412D A CH69412D A CH 69412DA CH 69412 A CH69412 A CH 69412A
Authority
CH
Switzerland
Prior art keywords
alarm device
electric alarm
electric
alarm
Prior art date
Application number
CH69412A
Other languages
German (de)
Inventor
Jackson Stewart
Original Assignee
Jackson Stewart
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 Jackson Stewart filed Critical Jackson Stewart
Publication of CH69412A publication Critical patent/CH69412A/en

Links

Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04CELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00Producing acoustic time signals by electrical means
    • G04C21/16Producing acoustic time signals by electrical means producing the signals at adjustable fixed times
    • G04C21/30Producing 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
    • G04C21/305Producing 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 by the hand(s) or handlike members closing the contacts

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
CH69412A 1914-11-20 1914-11-20 Electric alarm device CH69412A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH69412T 1914-11-20

Publications (1)

Publication Number Publication Date
CH69412A true CH69412A (en) 1915-06-16

Family

ID=4317443

Family Applications (1)

Application Number Title Priority Date Filing Date
CH69412A CH69412A (en) 1914-11-20 1914-11-20 Electric alarm device

Country Status (1)

Country Link
CH (1) CH69412A (en)

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