GB419335A - Improvements in arrangement for the current supply of an alternating current sound signal apparatus from a direct current system - Google Patents

Improvements in arrangement for the current supply of an alternating current sound signal apparatus from a direct current system

Info

Publication number
GB419335A
GB419335A GB31699/33A GB3169933A GB419335A GB 419335 A GB419335 A GB 419335A GB 31699/33 A GB31699/33 A GB 31699/33A GB 3169933 A GB3169933 A GB 3169933A GB 419335 A GB419335 A GB 419335A
Authority
GB
United Kingdom
Prior art keywords
current
mains
direct current
arrangement
sound signal
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
GB31699/33A
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.)
ANDOR LENKEI
Original Assignee
ANDOR LENKEI
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 ANDOR LENKEI filed Critical ANDOR LENKEI
Publication of GB419335A publication Critical patent/GB419335A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

419,335. Audible signalling-apparatus- LENKEI, A., 25, II. Olasz Fasor, Budapest. Nov. 14, 1933, No. 31699. Convention date, Nov. 18, 1932. [Class 118 (ii).] The ripple on direct current mains is used to operate a sound producer, such as a buzzer, the ripple being fed from the mains to the signalling circuit over a transformer. As shown in the Figure, the mains I are connected to the signalling circuit II over transformer T, a condenser C1 being provided in the mains to prevent the direct current from reaching T. A condenser C2 may be pro. vided in the signalling circuit the condenser and transformer being tuned to the frequency of the loud-speaker or buzzer H. The signal circuit is closed by switches B.
GB31699/33A 1932-11-18 1933-11-14 Improvements in arrangement for the current supply of an alternating current sound signal apparatus from a direct current system Expired GB419335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU419335X 1932-11-18

Publications (1)

Publication Number Publication Date
GB419335A true GB419335A (en) 1934-11-09

Family

ID=10979125

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31699/33A Expired GB419335A (en) 1932-11-18 1933-11-14 Improvements in arrangement for the current supply of an alternating current sound signal apparatus from a direct current system

Country Status (1)

Country Link
GB (1) GB419335A (en)

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