FR427998A - Automatic wake-up system - Google Patents

Automatic wake-up system

Info

Publication number
FR427998A
FR427998A FR427998DA FR427998A FR 427998 A FR427998 A FR 427998A FR 427998D A FR427998D A FR 427998DA FR 427998 A FR427998 A FR 427998A
Authority
FR
France
Prior art keywords
automatic wake
wake
automatic
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
Friedrich Kassen
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 FR427998A publication Critical patent/FR427998A/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)
FR427998D 1911-04-01 1911-04-01 Automatic wake-up system Expired FR427998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR427998T 1911-04-01

Publications (1)

Publication Number Publication Date
FR427998A true FR427998A (en) 1911-08-19

Family

ID=1470426

Family Applications (1)

Application Number Title Priority Date Filing Date
FR427998D Expired FR427998A (en) 1911-04-01 1911-04-01 Automatic wake-up system

Country Status (1)

Country Link
FR (1) FR427998A (en)

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