US1737872A - Arrangement to protect capacitive loud-speakers against puncture - Google Patents

Arrangement to protect capacitive loud-speakers against puncture Download PDF

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Publication number
US1737872A
US1737872A US273633A US27363328A US1737872A US 1737872 A US1737872 A US 1737872A US 273633 A US273633 A US 273633A US 27363328 A US27363328 A US 27363328A US 1737872 A US1737872 A US 1737872A
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US
United States
Prior art keywords
loudspeaker
capacitive
loud
arrangement
resistance
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
US273633A
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English (en)
Inventor
Ardenne Manfred Von
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Individual
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Individual
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Publication date
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Application granted granted Critical
Publication of US1737872A publication Critical patent/US1737872A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R19/00—Electrostatic transducers
    • H04R19/02—Loudspeakers

Definitions

  • the present invention discloses ways and means whereby the said inconvenience and danger in the use of capacitive loudspeakers is to be obviated, such protective means being adapted to prevent the establishment of an arc in case of puncture.
  • This protection device consists of a highohm resistance 1, inserted in one of the supply leads connected with one of the condenser coats of the loudspeaker 2, said resistance being shunted by a condenser 3 of high capacity.
  • the resistance value of the said high-ohm resistance should be as high as possible, though low compared with the insulation resistance of the loudspeaker. In this way, it does not impair the feed of the D. C. voltage required for the operation of the loudspeaker, though it prevents the production of a strong D. G. which would be required for arcing in case of a breakdown,
  • the capacity of the condenser must be several times higher than the capacity of the loudspeaker
  • Means for protecting capacitive loudspeakers against breakdown comprising a high ohmic resistance and a condenser shunted across said resistance in an inputlead of said loudspeaker.
  • a capacitive loudspeaker havin an resistance and a condenser in parallel therew1th,-sa1d ohmic reslstance havlng a value comparatively small to the insulation resistance of said loudspeaker.
  • means for protecting the loudspeaker against breakdown comprising a high-ohm resistance arranged in series with a conductor leading to one of the diaphragm electrodes of the loud.- speaker, and a capacity in said conductor and in parallel with the resistance, the value of the said high-ohm resistance being the insulation resistance of the loudspeaker, and the value of-the said capacity being greater than the capacity of the loudspeaker.
  • means for protecting the loudspeaker against breakdown comprising a high-ohmic resistance in series with a conductor leading to a diaphragm electrode of the loudspeaker and a condenser in said conductor and arranged in parallel with said resistance.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Protection Of Static Devices (AREA)
  • Circuit For Audible Band Transducer (AREA)
US273633A 1927-04-28 1928-04-28 Arrangement to protect capacitive loud-speakers against puncture Expired - Lifetime US1737872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE289472X 1927-04-28

Publications (1)

Publication Number Publication Date
US1737872A true US1737872A (en) 1929-12-03

Family

ID=6059837

Family Applications (1)

Application Number Title Priority Date Filing Date
US273633A Expired - Lifetime US1737872A (en) 1927-04-28 1928-04-28 Arrangement to protect capacitive loud-speakers against puncture

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US (1) US1737872A (en))
FR (1) FR653356A (en))
GB (1) GB289472A (en))
NL (1) NL28231C (en))

Also Published As

Publication number Publication date
FR653356A (fr) 1929-03-20
GB289472A (en) 1929-06-06
NL28231C (en))

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