US1747952A - Electrostatic loud-speaker - Google Patents

Electrostatic loud-speaker Download PDF

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Publication number
US1747952A
US1747952A US328598A US32859828A US1747952A US 1747952 A US1747952 A US 1747952A US 328598 A US328598 A US 328598A US 32859828 A US32859828 A US 32859828A US 1747952 A US1747952 A US 1747952A
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United States
Prior art keywords
membrane
electrostatic
speaker
loud speaker
loud
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
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US328598A
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English (en)
Inventor
Reisz Eugen
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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 US1747952A publication Critical patent/US1747952A/en
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Classifications

    • 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

Definitions

  • This invention relates to electrostatic loud speakers and the like, and more particularly to electrostatic loud speakers of the kind in which a soft ductile membrane, provided emotifacts and distortion consequently occurs.
  • the rigid conductin late of an electrostatic loudspeaker of the 1nd referred to is formed with holes or perforations of such shape that, even with large amplitude vibrations, the electrostatic forces upon the membrane, and therefore the movement thereof, remain proportional to the applied electrical amplitudes.
  • Figures 2 and 3 are enlarged fragmentary views of a portion of the said loud speaker with its membrane in two different positions, while Figure 4 indicates diagrammatically the chief positions of the membrane durlng its oscillations,
  • a is a membrane, for example, of rubber, upon which is afiixed a thin layer 6 of a conducting ma terial, as, for example, carbon particles or a very thin metal foil.
  • the membrane a is placed against a rigid metal plate 0 provided with holes 6 whose exterior walls f are curved parabolically as shown. The exact form of this curve, i. e.- the parabola, determines the distribution of the electrostatic field, and. the
  • a metallic plate having openings through the same, a soft ductile membrane, and a coating 5 of a conducting material on one side of said membrane, said membrane being arranged I with its uncoated side opposed to an adjacent side of said plate to produce a structure hav ing the characteristics of a condenser, the Walls of the said openings being shaped to substantially parabolic form toward that side of said plate opposed to the said membrane.
  • a rigidmetallic plate having openings through the same, a soft ductile membrane and a relatively thin coating of a conducting material on one side of said membrane, said membrane beingarranged with its uncoated side directly opposed tovan adjacent side of said plate to produce a'structure having the characteristics of a condenser, the Walls of the said openings toward the ends thereof at the side of said plate opposed by said membrane being shaped to substantially parabolic form.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
US328598A 1927-12-29 1928-12-26 Electrostatic loud-speaker Expired - Lifetime US1747952A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1747952X 1927-12-29

Publications (1)

Publication Number Publication Date
US1747952A true US1747952A (en) 1930-02-18

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ID=7741632

Family Applications (1)

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US328598A Expired - Lifetime US1747952A (en) 1927-12-29 1928-12-26 Electrostatic loud-speaker

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US (1) US1747952A (enrdf_load_stackoverflow)
NL (1) NL23896C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201874B1 (en) 1998-12-07 2001-03-13 American Technology Corporation Electrostatic transducer with nonplanar configured diaphragm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6201874B1 (en) 1998-12-07 2001-03-13 American Technology Corporation Electrostatic transducer with nonplanar configured diaphragm

Also Published As

Publication number Publication date
NL23896C (enrdf_load_stackoverflow)

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