FR473353A - Call bell pendulum system - Google Patents

Call bell pendulum system

Info

Publication number
FR473353A
FR473353A FR473353DA FR473353A FR 473353 A FR473353 A FR 473353A FR 473353D A FR473353D A FR 473353DA FR 473353 A FR473353 A FR 473353A
Authority
FR
France
Prior art keywords
call bell
pendulum system
bell pendulum
call
pendulum
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
Salomon Dreyfus
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 FR473353A publication Critical patent/FR473353A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR473353D 1914-06-11 1914-06-11 Call bell pendulum system Expired FR473353A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR473353T 1914-06-11

Publications (1)

Publication Number Publication Date
FR473353A true FR473353A (en) 1915-01-09

Family

ID=1511424

Family Applications (1)

Application Number Title Priority Date Filing Date
FR473353D Expired FR473353A (en) 1914-06-11 1914-06-11 Call bell pendulum system

Country Status (1)

Country Link
FR (1) FR473353A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952535C (en) * 1951-09-11 1956-11-15 Heinrich Seitel Time switch that switches several independent power consumers on and off at times that can be selected and set in advance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952535C (en) * 1951-09-11 1956-11-15 Heinrich Seitel Time switch that switches several independent power consumers on and off at times that can be selected and set in advance

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