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US878087A - Electric alarm operated by alarm-clocks. - Google Patents

Electric alarm operated by alarm-clocks. Download PDF

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Publication number
US878087A
US878087A US36344507A US1907363445A US878087A US 878087 A US878087 A US 878087A US 36344507 A US36344507 A US 36344507A US 1907363445 A US1907363445 A US 1907363445A US 878087 A US878087 A US 878087A
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US
United States
Prior art keywords
alarm
clocks
electric
operated
witnesses
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 - Lifetime
Application number
US36344507A
Inventor
Edward Ploudre
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Individual
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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
Priority to US36344507A priority Critical patent/US878087A/en
Application granted granted Critical
Publication of US878087A publication Critical patent/US878087A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G04C21/20—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm
    • G04C21/22—Producing acoustic time signals by electrical means producing the signals at adjustable fixed times by closing a contact to ring an electromechanical alarm put into action by the arbor of a mechanical alarm work

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Description

FA'IEENTED FEB, A, 1908.
A B. PLGUDHE. ELECTRIC ALARM OPERATED BY ALARM CLOCKS.
APPLICATION FILED MAR. 20, 1907.
2 SHEETS-SEEET l.
l/WEIVTOR WITNESSES:
. AITORNEY PATEN-TBD FEB. 4-, 1908.
PLOUDRE. LEGTEIO ALARM 092351 1311 BY ALARM momma APPLICATION FILED MAR. 20, 1907.
vertical metallic post and the other end cell-- terminals of which circuit are closed by the 10 nectedto the armed metallic rod, adapted to armed metallic rod descending. force the armed metallic rod down and in In testimony whereof l affix my signature contact with one of the terminals of an elecin the presence of two Witnesses.
trie circuit; and an electric circuit including e source of electricity, an inoandescentlight,, ED A ARI) PLO UDRE' e11 electric bell, and a circuit closing switch between the electric bell and the source of electricity, all electrically connected, the I Witnesses WM. REMAKLUR, H. G. CLEAVELAND.
US36344507A 1907-03-20 1907-03-20 Electric alarm operated by alarm-clocks. Expired - Lifetime US878087A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US36344507A US878087A (en) 1907-03-20 1907-03-20 Electric alarm operated by alarm-clocks.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US36344507A US878087A (en) 1907-03-20 1907-03-20 Electric alarm operated by alarm-clocks.

Publications (1)

Publication Number Publication Date
US878087A true US878087A (en) 1908-02-04

Family

ID=2946530

Family Applications (1)

Application Number Title Priority Date Filing Date
US36344507A Expired - Lifetime US878087A (en) 1907-03-20 1907-03-20 Electric alarm operated by alarm-clocks.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436906A (en) * 1945-04-25 1948-03-02 Svoboda Theodore Clock-controlled switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2436906A (en) * 1945-04-25 1948-03-02 Svoboda Theodore Clock-controlled switch

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