US1886235A - Method of stabilizing noncrystalline piezo-electric microphone diaphragms - Google Patents

Method of stabilizing noncrystalline piezo-electric microphone diaphragms Download PDF

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Publication number
US1886235A
US1886235A US391585A US39158529A US1886235A US 1886235 A US1886235 A US 1886235A US 391585 A US391585 A US 391585A US 39158529 A US39158529 A US 39158529A US 1886235 A US1886235 A US 1886235A
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United States
Prior art keywords
piezo
electric
stabilizing
noncrystalline
potential
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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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US391585A
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English (en)
Inventor
Meissner Alexander
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.)
Telefunken AG
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Telefunken AG
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Publication date
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Publication of US1886235A publication Critical patent/US1886235A/en
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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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/42—Piezoelectric device making

Definitions

  • This invention relates to the piezo-electric art and deals more specifically with the production of piezo-electric materials from noncrystalline substances.
  • the piezo-electric properties of the body thus produced may be substantially increased by the addition of a powdered piezo-electric body such as quartz, for example. 7
  • Fig. 1 is a diagrammatic view showing a system embodying the principles of the present invention.
  • Fig. 2 is a diagrammatic showing of the properties of piezo-electric elements in accordance with the principles of this invention.
  • a piezo-electrio plate or diaphragm P is connected to the input circuit of a vacuum tube amplifier R.
  • the present figure discloses, by way of example, the use of the piezo-electric element as a microphone.
  • the piezo-electric body may be used, in accordance with the principles of the present disclosure, for all purposes for which piezo-electric bodies are now used, such as, for example, as a means to maintain constant the frequency of an oscillation generator, a frequency standard, or other uses.
  • a piezoelectric body of the type herein disclosed loses its piezo-electric action or moment in the course of time but that such decrease in piezoelectric action can be either entirely eliminate or retarded to a substantial degree by applying across the terminals of the piezoelectric ody a direct current potential.
  • the direct current source B is shown permanently connected to the terminals of the crystal P.
  • a locking condenser C is applied between the the vacuum tube and one terminal of the crystal, thus cutting off the direct current potential between tne filament and grid of the vacuum tube R.
  • the condenser C is proportioned so that the alternating current potentials, created when the plate or diaphragm P responds to voice waves, are allowed to act upon the grid grid of of the tube R in a manner well understood.
  • Fig. 2 shows graphically the variation of the piezo-electric moment for substances of this kind plotted against the time.
  • a iezo-electric element comprising a ized in that the potential 'is-appliedfi'n'imev diately after forming the plate, and that the sense of said potential is'the same as that of the forming potential.
  • an electron discharge device having a cathode, anode and control electrode, a non-crystalline piezo-electric body connected to said cathode and control electrode, a source of direct current potential located across the plates of said piezo-electric bod and a blocking condenser located interme iate said control electrode and said body.
  • ethod o stabilizing a non-crystalline body possessing piezo-electric properties WhlCh comprises applying a unidirectional potential to the electrodes of said body.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Gyroscopes (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
US391585A 1928-08-01 1929-09-10 Method of stabilizing noncrystalline piezo-electric microphone diaphragms Expired - Lifetime US1886235A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE316628T 1928-08-01

Publications (1)

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US1886235A true US1886235A (en) 1932-11-01

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ID=31894743

Family Applications (1)

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US391585A Expired - Lifetime US1886235A (en) 1928-08-01 1929-09-10 Method of stabilizing noncrystalline piezo-electric microphone diaphragms

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US (1) US1886235A (enrdf_load_stackoverflow)
GB (1) GB316628A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767067A (en) * 1953-11-04 1956-10-16 Arthur C Prichard Crystal detwinning
US3309606A (en) * 1963-11-29 1967-03-14 Exxon Research Engineering Co Variable permitivity device and prodcess therefor
US4128489A (en) * 1975-12-29 1978-12-05 Mitsubishi Petrochemical Company Limited Piezo-electric material
US4878150A (en) * 1987-02-20 1989-10-31 Colgate-Palmolive Co. Polarizable material having a liquid crystal microstructure and electrical components produced therefrom
US5038249A (en) * 1987-02-20 1991-08-06 Colgate-Palmolive Co. Nonisotropic solution polarizable material and electrical components produced therefrom
US5206797A (en) * 1987-02-20 1993-04-27 Colgate-Palmolive Company Nonisotropic solution polarizable material and electrical components produced therefrom
US6550639B2 (en) 2000-12-05 2003-04-22 S.C. Johnson & Son, Inc. Triboelectric system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2767067A (en) * 1953-11-04 1956-10-16 Arthur C Prichard Crystal detwinning
US3309606A (en) * 1963-11-29 1967-03-14 Exxon Research Engineering Co Variable permitivity device and prodcess therefor
US4128489A (en) * 1975-12-29 1978-12-05 Mitsubishi Petrochemical Company Limited Piezo-electric material
US4878150A (en) * 1987-02-20 1989-10-31 Colgate-Palmolive Co. Polarizable material having a liquid crystal microstructure and electrical components produced therefrom
US4974118A (en) * 1987-02-20 1990-11-27 Colgate-Palmolive Company Nonisotropic solution polarizable material and electrical components produced therefrom
US5038249A (en) * 1987-02-20 1991-08-06 Colgate-Palmolive Co. Nonisotropic solution polarizable material and electrical components produced therefrom
US5206797A (en) * 1987-02-20 1993-04-27 Colgate-Palmolive Company Nonisotropic solution polarizable material and electrical components produced therefrom
US6550639B2 (en) 2000-12-05 2003-04-22 S.C. Johnson & Son, Inc. Triboelectric system

Also Published As

Publication number Publication date
GB316628A (enrdf_load_stackoverflow) 1930-05-22

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