US1799053A - Electrostatic telephone-receiving instrument - Google Patents

Electrostatic telephone-receiving instrument Download PDF

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Publication number
US1799053A
US1799053A US377038A US37703829A US1799053A US 1799053 A US1799053 A US 1799053A US 377038 A US377038 A US 377038A US 37703829 A US37703829 A US 37703829A US 1799053 A US1799053 A US 1799053A
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electrode
fixed electrode
electrodes
electrostatic
movable electrode
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Expired - Lifetime
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US377038A
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English (en)
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Mache Gunter
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Individual
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Individual
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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

  • This invention relates to electrostatic telephone receiving instruments, and particularly to so-called electrostatic loud speakers.
  • Such an instrument consists essentially of a d condenser which comprises a fixed electrode and an easily movable electrode to which a direct current potential is applied in conjunction with an alternating potential.
  • the alternating vpotential sets up electrostatic forces which give rise to attraction between the two electrodes so as to cause the movable electrode to move to and from the fixed electrode.
  • the alteration in capacity due to the relative movement forms the working capacity of the telephone instrument.
  • the alteration in capacity gives rise to a corresponding alteration in air pressure due to the movement of the diaphragm, resulting in the sound output of the instrument.
  • the working capacity is limited by the spacing apart of the electrodes in the working condition.
  • the distance apart must be chosen sufliciently great in order to render possible large amplitudes of vibration. This, however, cannot be attained incon possible.
  • the electrodes are spaced widely apart, the necessary drivpotential is increased.
  • the fixed and movable electrodes are arranged so that the movable electrode is disposed alternately close to and spaced away from the fixed electrode, the arrangement being produced by suitably curving or troughing the fixed or movable electrode in such a way that the rolling or flattening action and the elastic recovery of the movable electrode relatively to the fixed electrode can take place easily.
  • Figure 5 is a diagrammatic top view of a loud speaker composed of five cylinder so parts.
  • Figure 6 is. a scheme ofthe whole loud speaker arrangement and shows as well a modified form of the loud speaker as the electrical'connections.
  • the fixed electrode a is provided with perforations or slots d arranged in rows.
  • the movable electrode b is placed opposite the fixed electrode but is given the shape of a series of troughlike strips, the central line of each trough merely being separated from the fixed electrode a by a layer of 'solid dielectric a
  • the angle at which two trough-like sections of the the electrostatic forces which come into action when the device is o crating give rise to Eattening efiect with an elastic recovery of the same.
  • the holes or slots d in the fixed electrode a are-armovable electrode 6 meet is so designed that ranged so that they occur opposite the ridges or lines 6 of junction between the troughs of the movable electrode 1).
  • FIG 2 a modified construction is shown in which the fixed electrode a is shaped with corrugations or trough-like strips.
  • the elastically yielding movable electrode 1) is shaped so that it comes'into contact with the fixed electrode a except for the small distance it is spaced away by the dielectric 6 along the centre lines of the trough-like sections of the fixed electrode a.
  • both electrodes may be shaped so as to be in the form of corrugated strips or troughs.
  • the radius of curvature of the sections of the electrode a is substantially smaller than that of the sections of the movable electrode 1) so that the latter can flatten out or roll out both against the fixed electrode a and the fixed electrode a, although, of course, here also it is separated from these electrodes by the insulating or dielectric layer 0.
  • Fig. 5 shows another form of loud speaker according to the invention.
  • the loud speaker is composed of five single cylinder parts which may be welded or fixed to each other in any suitable manner.
  • the whole apparatus is built up in the way shown in Fig.4.
  • the fixed electrode (1 forms a relatively small part of a cylinder of large diameter.
  • the electrode a is surrounded by the insulating layer 0 and this layer by the corrugated movable electrode 6, upon which the diaphragm 7 1s expended.
  • a throttling winding 15 is interposed between the plug of the accumulator g and the valve h.
  • a conductor m is branched off to the electrode a of the loud speaker whereas the electrode 1) is connected to the connecting line at between the plug of the accumulator g and the cathode of the valve h by a conductor 0.
  • An electrostatic loud speaking telephone comprising in combination a fixed electrode, a dielectric layer applied to said fixed electrode, a corrugated movable electrode shaped so as alternately to be in contact with said dielectric layer and to be spaced apart from same, and means for applying to said electrodes a direct current potential in conjunction with an alternating potential.
  • An electrostatic loud speaking telephone comprising in combination a fixed electrode formed with rows of apertures, a dielectric layer in contact with said fixed electrode and correspondingly apertured, a corrugated movable electrode shaped so as alternately to contact with said dielectric layer and to be spaced away from same, the spaced-away portions lying opposite the apertures in said fixed electrode, and means for applying to said electrodes a direct current potential in conjunction with an alternating potential.
  • An electrostatic loud speaking telephone comprising in combination a fixed electrode, a dielectric layer in contact therewith, a movable electrode shaped as a series of adjoining corrugated strips, and means for applying to said electrodes a direct current potential in conjunction with an alternatlng current potential.
  • An electrostatic loud speaking telephone comprising a fixed electrode shaped as a series of adjoining corrugated strips with rows of apertures along the junction between said strips, a dielectric layer applied to said electrode on the convex surfaces thereof, a movable electrode also formed as a series of adjoining corrugated strips and in contact with said dielectric layer along the crests of the corrugated strips thereof, and means for applying to said electrodes a direct current potential in conjunction with an alternating potential.
  • An electrostatic loud speaking telephone comprising a fixed electrode formed wlth rows of apertures, a dielectric layer in contact with said fixed electrode, a movable electrode comprising a series of adjoining corrugated strips, a second fixed electrode disposed on the side of said movable electrode remote from said first-mentioned fixed electrode, and comprising a series of adjoining corrugated strips each having a radius of curvature substantially less than that of the corrugations of said movable electrode, and a second dielectric layerinterposed between said movable electrode and said secondnamed fixed electrode, and means for applying: to said electrodes a direct current potential and an alternating potential so as to act in opposition on said movable electrode to afford a (liiferential drive.
  • An electrostatic loud speaking tele hone comprising in combination apair 0 electrodes, a dielectric layer applied to one of said electrodes, one of said electrodes being fixed, the other electrode being movable and being corrugated so as alternately to be adjacent to said fixed electrode and separated therefrom only by the thickness of said dielectric layer and to be spaced apart from said fixed electrode. and means for applying to said electrodes a direct current potential in conjunction with an alternating potential.

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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)
US377038A 1929-04-30 1929-07-09 Electrostatic telephone-receiving instrument Expired - Lifetime US1799053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1799053X 1929-04-30

Publications (1)

Publication Number Publication Date
US1799053A true US1799053A (en) 1931-03-31

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ID=7743806

Family Applications (1)

Application Number Title Priority Date Filing Date
US377038A Expired - Lifetime US1799053A (en) 1929-04-30 1929-07-09 Electrostatic telephone-receiving instrument

Country Status (3)

Country Link
US (1) US1799053A (enrdf_load_stackoverflow)
FR (1) FR677217A (enrdf_load_stackoverflow)
NL (1) NL29692C (enrdf_load_stackoverflow)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631196A (en) * 1949-10-05 1953-03-10 Arthur A Janszen Electrostatic loud-speaker
US3814864A (en) * 1972-07-14 1974-06-04 J Victoreen Condenser microphone having a plurality of discrete vibratory surfaces
US6175636B1 (en) 1998-06-26 2001-01-16 American Technology Corporation Electrostatic speaker with moveable diaphragm edges
US6188772B1 (en) 1998-01-07 2001-02-13 American Technology Corporation Electrostatic speaker with foam stator
US6201874B1 (en) 1998-12-07 2001-03-13 American Technology Corporation Electrostatic transducer with nonplanar configured diaphragm
US6304662B1 (en) 1998-01-07 2001-10-16 American Technology Corporation Sonic emitter with foam stator
US20020076069A1 (en) * 1998-01-07 2002-06-20 American Technology Corporation Sonic emitter with foam stator
US20020118856A1 (en) * 2001-01-26 2002-08-29 American Technology Corporation Planar-magnetic speakers with secondary magnetic structure
US20020191808A1 (en) * 2001-01-22 2002-12-19 American Technology Corporation Single-ended planar-magnetic speaker
US20050089176A1 (en) * 1999-10-29 2005-04-28 American Technology Corporation Parametric loudspeaker with improved phase characteristics
US20050100181A1 (en) * 1998-09-24 2005-05-12 Particle Measuring Systems, Inc. Parametric transducer having an emitter film
US20050195985A1 (en) * 1999-10-29 2005-09-08 American Technology Corporation Focused parametric array
US20060280315A1 (en) * 2003-06-09 2006-12-14 American Technology Corporation System and method for delivering audio-visual content along a customer waiting line
US20070189548A1 (en) * 2003-10-23 2007-08-16 Croft Jams J Iii Method of adjusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same
US20120148071A1 (en) * 2010-12-10 2012-06-14 Alfons Dehe Micromechanical Digital Loudspeaker
US8275137B1 (en) 2007-03-22 2012-09-25 Parametric Sound Corporation Audio distortion correction for a parametric reproduction system
US8767979B2 (en) 2010-06-14 2014-07-01 Parametric Sound Corporation Parametric transducer system and related methods
US8903104B2 (en) 2013-04-16 2014-12-02 Turtle Beach Corporation Video gaming system with ultrasonic speakers
US8934650B1 (en) 2012-07-03 2015-01-13 Turtle Beach Corporation Low profile parametric transducers and related methods
US8958580B2 (en) 2012-04-18 2015-02-17 Turtle Beach Corporation Parametric transducers and related methods
US8988911B2 (en) 2013-06-13 2015-03-24 Turtle Beach Corporation Self-bias emitter circuit
US9036831B2 (en) 2012-01-10 2015-05-19 Turtle Beach Corporation Amplification system, carrier tracking systems and related methods for use in parametric sound systems
US9332344B2 (en) 2013-06-13 2016-05-03 Turtle Beach Corporation Self-bias emitter circuit

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631196A (en) * 1949-10-05 1953-03-10 Arthur A Janszen Electrostatic loud-speaker
US3814864A (en) * 1972-07-14 1974-06-04 J Victoreen Condenser microphone having a plurality of discrete vibratory surfaces
US6188772B1 (en) 1998-01-07 2001-02-13 American Technology Corporation Electrostatic speaker with foam stator
US6304662B1 (en) 1998-01-07 2001-10-16 American Technology Corporation Sonic emitter with foam stator
US20020076069A1 (en) * 1998-01-07 2002-06-20 American Technology Corporation Sonic emitter with foam stator
US6175636B1 (en) 1998-06-26 2001-01-16 American Technology Corporation Electrostatic speaker with moveable diaphragm edges
US20050100181A1 (en) * 1998-09-24 2005-05-12 Particle Measuring Systems, Inc. Parametric transducer having an emitter film
US6201874B1 (en) 1998-12-07 2001-03-13 American Technology Corporation Electrostatic transducer with nonplanar configured diaphragm
US20050195985A1 (en) * 1999-10-29 2005-09-08 American Technology Corporation Focused parametric array
US8199931B1 (en) 1999-10-29 2012-06-12 American Technology Corporation Parametric loudspeaker with improved phase characteristics
US20050089176A1 (en) * 1999-10-29 2005-04-28 American Technology Corporation Parametric loudspeaker with improved phase characteristics
US20070127767A1 (en) * 2001-01-22 2007-06-07 American Technology Corporation Single-ended planar-magnetic speaker
US7142688B2 (en) 2001-01-22 2006-11-28 American Technology Corporation Single-ended planar-magnetic speaker
US20020191808A1 (en) * 2001-01-22 2002-12-19 American Technology Corporation Single-ended planar-magnetic speaker
US6934402B2 (en) 2001-01-26 2005-08-23 American Technology Corporation Planar-magnetic speakers with secondary magnetic structure
US20060050923A1 (en) * 2001-01-26 2006-03-09 American Technology Corporation Planar-magnetic speakers with secondary magnetic structure
US20090097693A1 (en) * 2001-01-26 2009-04-16 Croft Iii James J Planar-magnetic speakers with secondary magnetic structure
US20020118856A1 (en) * 2001-01-26 2002-08-29 American Technology Corporation Planar-magnetic speakers with secondary magnetic structure
US20060280315A1 (en) * 2003-06-09 2006-12-14 American Technology Corporation System and method for delivering audio-visual content along a customer waiting line
US20070189548A1 (en) * 2003-10-23 2007-08-16 Croft Jams J Iii Method of adjusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same
US7564981B2 (en) 2003-10-23 2009-07-21 American Technology Corporation Method of adjusting linear parameters of a parametric ultrasonic signal to reduce non-linearities in decoupled audio output waves and system including same
US8275137B1 (en) 2007-03-22 2012-09-25 Parametric Sound Corporation Audio distortion correction for a parametric reproduction system
US8767979B2 (en) 2010-06-14 2014-07-01 Parametric Sound Corporation Parametric transducer system and related methods
US8903116B2 (en) 2010-06-14 2014-12-02 Turtle Beach Corporation Parametric transducers and related methods
US9002032B2 (en) 2010-06-14 2015-04-07 Turtle Beach Corporation Parametric signal processing systems and methods
US9584941B2 (en) 2010-12-10 2017-02-28 Infineon Technologies Ag Micromechanical digital loudspeaker
US20120148071A1 (en) * 2010-12-10 2012-06-14 Alfons Dehe Micromechanical Digital Loudspeaker
US10237670B2 (en) 2010-12-10 2019-03-19 Infineon Technologies Ag Micromechanical digital loudspeaker
US9148712B2 (en) * 2010-12-10 2015-09-29 Infineon Technologies Ag Micromechanical digital loudspeaker
US9036831B2 (en) 2012-01-10 2015-05-19 Turtle Beach Corporation Amplification system, carrier tracking systems and related methods for use in parametric sound systems
US8958580B2 (en) 2012-04-18 2015-02-17 Turtle Beach Corporation Parametric transducers and related methods
US8934650B1 (en) 2012-07-03 2015-01-13 Turtle Beach Corporation Low profile parametric transducers and related methods
US8903104B2 (en) 2013-04-16 2014-12-02 Turtle Beach Corporation Video gaming system with ultrasonic speakers
US9332344B2 (en) 2013-06-13 2016-05-03 Turtle Beach Corporation Self-bias emitter circuit
US8988911B2 (en) 2013-06-13 2015-03-24 Turtle Beach Corporation Self-bias emitter circuit

Also Published As

Publication number Publication date
NL29692C (enrdf_load_stackoverflow)
FR677217A (fr) 1930-03-05

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