GB672228A - Flexure-sensitive electromechanical transducer device - Google Patents
Flexure-sensitive electromechanical transducer deviceInfo
- Publication number
- GB672228A GB672228A GB30442/49A GB3044249A GB672228A GB 672228 A GB672228 A GB 672228A GB 30442/49 A GB30442/49 A GB 30442/49A GB 3044249 A GB3044249 A GB 3044249A GB 672228 A GB672228 A GB 672228A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barium
- barium titanate
- titanate
- sheet
- portions
- 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
Links
- 229910002113 barium titanate Inorganic materials 0.000 abstract 7
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 abstract 7
- 229910052454 barium strontium titanate Inorganic materials 0.000 abstract 3
- 230000002463 transducing effect Effects 0.000 abstract 3
- 238000005452 bending Methods 0.000 abstract 2
- 239000000919 ceramic Substances 0.000 abstract 2
- 239000003989 dielectric material Substances 0.000 abstract 2
- 238000010304 firing Methods 0.000 abstract 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 230000010287 polarization Effects 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- 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
-
- 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
-
- 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
- Y10T29/43—Electric condenser making
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
672,228. Piezo-electric crystals. BRUSH DEVELOPMENT CO. Nov. 28, 1949 [Dec. 28, 1948], No. 30442/49. Class 40 (viii). A piezo-electric transducer element comprises a body free from structural discontinuities, one portion of which is of a dielectric material polarized to have a certain electro-mechanical transducing characteristic, and another portion of which has a different composition so as to have a different transducing characteristic, so that mechanical reaction between the two portions causes the element to operate by bending. In Fig. 5, a dielectric bar 21, preferably of a polycrystalline barium titanate ceramic, is fixed on a base 27 so that endwise movement of a shaft 29 to bend the bar causes simultaneous compression and extension of opposite sideportions of the bar underlying the respective electrodes 22, 23. As these portions have different transducing characteristics, a voltage appears across terminals 25, 26. One method of making element 21 comprises firing together a thin sheet of raw barium titanate and a thin sheet of raw barium-strontium titanate. The interface is eliminated by incipient sintering and vitrifying. Alternatively the element 21 may be formed by dipping a backing structure successively into aqueous dispersions of barium titanate and barium-strontium titanate, to form contiguous layers as described in Specification 672,226. Another method comprises covering one side of a barium titanate sheet with powdered strontium titanate and a flux. After ceramic firing, one side portion of the sheet will be converted into barium-strontium titanate. A similar result may be obtained by using stannic oxide. In the above elements, both portions are of dielectric materials, but only the barium titanate portion is capable of retaining any appreciable remanant polarization. Alternatively, one portion may be of relatively highconductivity material produced by chemically reducing part of a barium titanate sheet, as described in Specification 672,227. Whichever element is used it is mounted as in Fig. 5 and a high polarizing voltage is temporarily applied from a source 30. This leaves the barium titanate portion in an electro-mechanically sensitive condition, while the other portion is relatively inert, this enabling the element to operate by bending. The polarizing voltage may be retained during operation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US67741A US2624853A (en) | 1948-12-28 | 1948-12-28 | Flexure-sensitive electromechanical transducer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB672228A true GB672228A (en) | 1952-05-14 |
Family
ID=22078082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30442/49A Expired GB672228A (en) | 1948-12-28 | 1949-11-28 | Flexure-sensitive electromechanical transducer device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2624853A (en) |
| GB (1) | GB672228A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2756353A (en) * | 1950-04-10 | 1956-07-24 | Gen Electric | Bender-mode piezoelectric device and method of making the same |
| US2928068A (en) * | 1952-03-25 | 1960-03-08 | Gen Electric | Compressional wave transducer and method of making the same |
| US2902545A (en) * | 1952-10-30 | 1959-09-01 | Gen Electric | Shear type piezo-electric device |
| GB738939A (en) * | 1952-10-30 | 1955-10-19 | Gen Electric | Improvements relating to piezo-electric devices |
| US2784481A (en) * | 1952-12-01 | 1957-03-12 | Donald M Kitterman | Method for attaching a wire in end on relationship to the surface of a body |
| US2835761A (en) * | 1953-05-25 | 1958-05-20 | Electric Machinery Mfg Co | Electrostrictive ceramic actuator |
| US2859409A (en) * | 1953-09-14 | 1958-11-04 | Cleveland Patents Inc | Signal generator |
| US2909775A (en) * | 1957-09-05 | 1959-10-20 | American Telephone & Telegraph | Antenna |
| US3072805A (en) * | 1958-11-13 | 1963-01-08 | Acoustica Associates Inc | Autopolarization of electrostrictive transducers |
| US3958161A (en) * | 1973-03-12 | 1976-05-18 | Battelle Development Corporation | Method of controlling the polarization condition of transducers |
| US4951370A (en) * | 1979-11-05 | 1990-08-28 | Texas Instruments Incorporated | Method of making an intelligent multiprobe tip |
| US4888550A (en) * | 1981-09-14 | 1989-12-19 | Texas Instruments Incorporated | Intelligent multiprobe tip |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US355149A (en) * | 1886-12-28 | Amos emeeson dolbeae | ||
| USRE20213E (en) * | 1927-05-06 | 1936-12-22 | Piezoelectric device | |
| US2394670A (en) * | 1942-07-10 | 1946-02-12 | Western Electric Co | Dielectric material |
| US2388242A (en) * | 1943-01-11 | 1945-11-06 | Brush Dev Co | Piezoelectric transducer |
| US2402515A (en) * | 1943-06-11 | 1946-06-18 | Titanium Alloy Mfg Co | High dielectric material and method of making same |
-
1948
- 1948-12-28 US US67741A patent/US2624853A/en not_active Expired - Lifetime
-
1949
- 1949-11-28 GB GB30442/49A patent/GB672228A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2624853A (en) | 1953-01-06 |
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