NL195880A - - Google Patents
Info
- Publication number
- NL195880A NL195880A NL195880DA NL195880A NL 195880 A NL195880 A NL 195880A NL 195880D A NL195880D A NL 195880DA NL 195880 A NL195880 A NL 195880A
- Authority
- NL
- Netherlands
- Prior art keywords
- june
- terminals
- pressure
- discs
- diaphragms
- Prior art date
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 1
- 229910002113 barium titanate Inorganic materials 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000002178 crystalline material Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 abstract 1
- 230000010287 polarization Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 230000002463 transducing effect Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
- B06B1/0607—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements
- B06B1/0611—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using multiple elements in a pile
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
- H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
- H01G7/025—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric
- H01G7/026—Electrets, i.e. having a permanently-polarised dielectric having an inorganic dielectric with ceramic dielectric
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/50—Piezoelectric or electrostrictive devices having a stacked or multilayer structure
- H10N30/503—Piezoelectric or electrostrictive devices having a stacked or multilayer structure having a non-rectangular cross-section in a plane orthogonal to the stacking direction, e.g. polygonal or circular in top view
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/80—Constructional details
- H10N30/88—Mounts; Supports; Enclosures; Casings
- H10N30/886—Additional mechanical prestressing means, e.g. springs
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Ceramic Engineering (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
776,498. Pieao-electric instruments. WESTERN ELECTRIC CO., Inc. June 17, 1955 [June 21, 1954], No. 17555/55. Class 40 (4). [Also in Group XL (b)] The transducing efficiency of a polarized ceramic element which includes a principal component of ferroelectric crystalline material characterized by a perovskite lattice structure is increased by applying pressure to the element in a direction normal to the direction of polarization. The pressure may be applied hydraulically to a stack of barium titanate discs 11 mounted between a pair of acoustically-sensitive diaphragms 27, 28 in a fluid-tight steel cylinder 24. A radial pressure of between 5000 and 10,000 lbs./sq. inch is maintained by means of a fluid introduced through the pipe 21. The discs are provided with silver electrodes which are connected alternately to an insulated terminal 22 and to the cylinder 24. To polarize the elements a voltage of about 25 v. per 0.001 inch thickness is applied across terminals 22, 23 as the unit is cooled to room temperature from a temperature just above the Curie point. Acoustic signals applied to the diaphragms 27, 28 produce an electrical output across the terminals 22, 23.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US776498XA | 1954-06-21 | 1954-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL195880A true NL195880A (en) |
Family
ID=22139280
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL103781D NL103781C (en) | 1954-06-21 | ||
| NL195880D NL195880A (en) | 1954-06-21 |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL103781D NL103781C (en) | 1954-06-21 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1058773B (en) |
| GB (1) | GB776498A (en) |
| NL (2) | NL195880A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1051256A (en) * | 1962-08-30 | |||
| DE1291547B (en) * | 1965-10-23 | 1969-03-27 | Aerojet General Co | Method for preloading ultrasonic transducers |
| US3396285A (en) * | 1966-08-10 | 1968-08-06 | Trustees Of The Ohio State Uni | Electromechanical transducer |
| GB9104883D0 (en) * | 1991-03-08 | 1991-06-12 | British Aerospace | Flextensional sonar transducers |
| US7531947B2 (en) | 2004-09-07 | 2009-05-12 | Nippon Soken, Inc. | Stacked piezoelectric element and production method thereof |
-
0
- NL NL103781D patent/NL103781C/xx active
- NL NL195880D patent/NL195880A/xx unknown
-
1955
- 1955-04-26 DE DEW16555A patent/DE1058773B/en active Pending
- 1955-06-17 GB GB17555/55A patent/GB776498A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1058773B (en) | 1959-06-04 |
| NL103781C (en) | |
| GB776498A (en) | 1957-06-05 |
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