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

Method of stabilizing noncrystalline piezo-electric microphone diaphragms Download PDF

Info

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
Authority
US
United States
Prior art keywords
piezo
electric
stabilizing
noncrystalline
potential
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
US391585A
Other languages
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
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US1886235A publication Critical patent/US1886235A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Gyroscopes (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)

Publication Number Publication Date
US1886235A true US1886235A (en) 1932-11-01

Family

ID=31894743

Family Applications (1)

Application Number Title Priority Date Filing Date
US391585A Expired - Lifetime US1886235A (en) 1928-08-01 1929-09-10 Method of stabilizing noncrystalline piezo-electric microphone diaphragms

Country Status (2)

Country Link
US (1) US1886235A (de)
GB (1) GB316628A (de)

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 (de) 1930-05-22

Similar Documents

Publication Publication Date Title
US4524247A (en) Integrated electroacoustic transducer with built-in bias
US2486776A (en) Self-biased electric translating device
US1886235A (en) Method of stabilizing noncrystalline piezo-electric microphone diaphragms
US2592703A (en) Transducing device having an electromechanically responsive dielectric element
US3436492A (en) Field effect electroacoustic transducer
US2616223A (en) Device for converting electrical energy into mechanical oscillation energy
DE2253833B2 (de) Piezoelektrisches elektroakustisches wandlerelement
US3287506A (en) Semiconductor-based electro-acoustic transducer
US4512941A (en) Polarizing of piezoelectric material
US1559116A (en) Wave generating and modulating system
US2213551A (en) Electron discharge device
US1995257A (en) Piezo-electric device and method of producing same
US1639000A (en) Wave modulation
JP2001112091A (ja) コンデンサマイクロホン用振動板の電荷帯電方法及び電荷帯電装置
US2054431A (en) Modulation
US3763530A (en) Method of manufacturing piezoelectric resonators for controlling the coupling coefficient thereof
US1564627A (en) Wireless telegraph and telephone transmission
US1869829A (en) Frequency-responsive crystal relay
US1917394A (en) Frequency modulation
US1636921A (en) Piezo audion
US1931530A (en) Electron tube oscillator system
US1837364A (en) Signaling apparatus
KR800000311B1 (ko) 부전하를 띤 고분자막의 제법
US1737992A (en) Volume-control system
US2207509A (en) Electrical oscillation generator