GB1383078A - Piezoelectric transducers - Google Patents
Piezoelectric transducersInfo
- Publication number
- GB1383078A GB1383078A GB1940672A GB1940672A GB1383078A GB 1383078 A GB1383078 A GB 1383078A GB 1940672 A GB1940672 A GB 1940672A GB 1940672 A GB1940672 A GB 1940672A GB 1383078 A GB1383078 A GB 1383078A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- diaphragm
- centre
- electrodes
- tensioned
- 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
- 239000000463 material Substances 0.000 abstract 8
- 239000002184 metal Substances 0.000 abstract 2
- 229920003023 plastic Polymers 0.000 abstract 2
- 239000004033 plastic Substances 0.000 abstract 2
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 239000004812 Fluorinated ethylene propylene Substances 0.000 abstract 1
- 239000002033 PVDF binder Substances 0.000 abstract 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 229910044991 metal oxide Inorganic materials 0.000 abstract 1
- 150000004706 metal oxides Chemical class 0.000 abstract 1
- 238000010422 painting Methods 0.000 abstract 1
- 229920009441 perflouroethylene propylene Polymers 0.000 abstract 1
- 229920000728 polyester Polymers 0.000 abstract 1
- 229920002620 polyvinyl fluoride Polymers 0.000 abstract 1
- 229920002981 polyvinylidene fluoride Polymers 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
- H04R17/02—Microphones
- H04R17/025—Microphones using a piezoelectric polymer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
Abstract
1383078 Microphones PLESSEY CO Ltd 29 March 1973 [26 April 1972] 19406/72 Heading H4J [Also in Division H1] A microphone for a telephone handset utilizes a strip of tensioned, fluorinated hydrocarbon piezoelectric material whicn carries electrodes on its opposed surfaces. The material may be polyvinylidene fluoride, polyvinylfluoride or fluorinated ethylene propylene copolymer. As shown a strip of such material 27 carrying electrodes 28, 29 is tensioned between clamping rings 30, 31 which support a thin metal conical diaphragm 40. The latter is coupled at its apex to the material possibly via an insulating layer of plastics, paper or a metal oxide. The material is between 0À0001 and 0À05 inches thick. The electrodes are applied by evaporation or by painting. In another arrangement (Fig. 1, not shown) the diaphragm is of plastics, e.g. polyester sheet to the centre of which one end of the piezo material sheet is affixed. The other end of the material is secured to a tension-adjusting screw. In Fig. 3 (not shown) there is depicted a flat, thin metal diaphragm which is rigidly coupled at its centre by a rod to the centre of a piezo material strip, the rod being affixed to the diaphragm and strip at either or both its ends or simply being compressed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1940672A GB1383078A (en) | 1972-04-26 | 1972-04-26 | Piezoelectric transducers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1940672A GB1383078A (en) | 1972-04-26 | 1972-04-26 | Piezoelectric transducers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1383078A true GB1383078A (en) | 1975-02-05 |
Family
ID=10128832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1940672A Expired GB1383078A (en) | 1972-04-26 | 1972-04-26 | Piezoelectric transducers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1383078A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2914608A1 (en) * | 1979-04-11 | 1980-10-23 | Sennheiser Electronic | Transducer for conversion of acoustic signals to electric - has piezoelectric element of film or foil in protected space fixed to metallic membrane |
| FR2470513A1 (en) * | 1979-11-26 | 1981-05-29 | Kureha Chemical Ind Co Ltd | DEVICE COMPRISING A MACROMOLECULAR PIEZOELECTRIC ELEMENT TRANSDUCER FOR FORMING ULTRASONIC IMAGES |
| FR2525062A1 (en) * | 1982-04-13 | 1983-10-14 | Kureha Chemical Ind Co Ltd | TRANSMISSION MICROPHONE |
| GB2204444A (en) * | 1987-03-30 | 1988-11-09 | Seikosha Kk | Vibrator assembly |
| US20200389739A1 (en) * | 2019-06-04 | 2020-12-10 | uBeam Inc. | Piezoelectric transducer |
-
1972
- 1972-04-26 GB GB1940672A patent/GB1383078A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2914608A1 (en) * | 1979-04-11 | 1980-10-23 | Sennheiser Electronic | Transducer for conversion of acoustic signals to electric - has piezoelectric element of film or foil in protected space fixed to metallic membrane |
| FR2470513A1 (en) * | 1979-11-26 | 1981-05-29 | Kureha Chemical Ind Co Ltd | DEVICE COMPRISING A MACROMOLECULAR PIEZOELECTRIC ELEMENT TRANSDUCER FOR FORMING ULTRASONIC IMAGES |
| FR2525062A1 (en) * | 1982-04-13 | 1983-10-14 | Kureha Chemical Ind Co Ltd | TRANSMISSION MICROPHONE |
| GB2204444A (en) * | 1987-03-30 | 1988-11-09 | Seikosha Kk | Vibrator assembly |
| GB2204444B (en) * | 1987-03-30 | 1991-03-20 | Seikosha Kk | Vibrator assembly |
| US20200389739A1 (en) * | 2019-06-04 | 2020-12-10 | uBeam Inc. | Piezoelectric transducer |
| WO2020247551A1 (en) * | 2019-06-04 | 2020-12-10 | uBeam Inc. | Piezoelectric transducer |
| US11190881B2 (en) * | 2019-06-04 | 2021-11-30 | uBeam Inc. | Piezoelectric transducer |
| US20220086568A1 (en) * | 2019-06-04 | 2022-03-17 | uBeam Inc. | Piezoelectric transducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |