GB578791A - Improvements in piezoelectric crystal devices - Google Patents
Improvements in piezoelectric crystal devicesInfo
- Publication number
- GB578791A GB578791A GB11331/44A GB1133144A GB578791A GB 578791 A GB578791 A GB 578791A GB 11331/44 A GB11331/44 A GB 11331/44A GB 1133144 A GB1133144 A GB 1133144A GB 578791 A GB578791 A GB 578791A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plates
- handed
- cut
- leads
- length
- 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
- 239000013078 crystal Substances 0.000 title abstract 6
- 239000010453 quartz Substances 0.000 abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 3
- 241000283903 Ovis aries Species 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- 238000005452 bending Methods 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000005684 electric field Effects 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000004332 silver Substances 0.000 abstract 1
- 229910000679 solder Inorganic materials 0.000 abstract 1
- 210000002268 wool Anatomy 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/54—Filters comprising resonators of piezoelectric or electrostrictive material
- H03H9/58—Multiple crystal filters
- H03H9/582—Multiple crystal filters implemented with thin-film techniques
- H03H9/583—Multiple crystal filters implemented with thin-film techniques comprising a plurality of piezoelectric layers acoustically coupled
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
578,791. Piezo - electric crystals. WESTERN ELECTRIC CO., Inc. June 13, 1944, No. 11331. Convention date, March 4, 1943. [Class 40 (v)] A crystal device comprises a pair of + 5‹ X cut quartz plates bonded together in major face to face relation and adapted to vibrate in flexure, the length and thickness of the plates being in accordance with the flexural mode frequency of the device, and the plates being supported and electrical connections being made to electrodes on the outside major faces of the plates substantially at the nodes of motion thereof so that a thickness direction electric field is applied to the plates. Figs. 1 and 2 show a compound element 1 adapted for bending movement comprising two plates 2, 3 cut from either a right-handed or left-handed quartz with its major faces perpendicular to the X-axis and its length dimension rotated 5‹ relative to the Y-axis. The plates are coated with silver and bonded together with silver solder, and electrode coatings 4 and 5 are applied to the outer faces, to which are soldered spring wire leads 7 which also serve for supporting the element. No leads are connected to the bonding material 10. The crystal bends about nodal lines 6 which are perpendicular to the length dimension and about .224 of the length from each end. The leads 7 are attached on the nodal lines. With the above orientation, and with the ratio of width to length in the range .2 to .35, the element has a very low temperature coefficient of frequency. If the two plates are cut one from a left-handed crystal and one from a right-handed crystal, the nodal lines make an angle of 11 degrees with the perpendicular to the length dimension. Fig. 6 shows.an arrangement in which a lead 8 is connected to the bonding 10, and leads 7 connected to the outer face electrodes are connected together to form the second lead 9. With this electrode arrangement, the oblique nodal line occurs when the plates are cut from the same handed quartz. If desired, either or both electrodes may be divided longitudinally to provide a pair of coupled elements. The elements may be mounted in an envelope which is evacuated or filled with an inert gas, and the envelope may be placed in a container filled with lambs' wool. Specification 544,834 and U.S.A. Specifications 1,860,529, 2,259,317 and 2,275,122 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US477915A US2410825A (en) | 1943-03-04 | 1943-03-04 | Piezoelectric crystal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB578791A true GB578791A (en) | 1946-07-11 |
Family
ID=23897845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11331/44A Expired GB578791A (en) | 1943-03-04 | 1944-06-13 | Improvements in piezoelectric crystal devices |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2410825A (en) |
| BE (1) | BE468392A (en) |
| FR (1) | FR940632A (en) |
| GB (1) | GB578791A (en) |
| NL (1) | NL65892C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458176A1 (en) * | 1979-05-29 | 1980-12-26 | Onera (Off Nat Aerospatiale) | Piezoelectric resonator insensitive to acceleration - has pair of elements which rotate in opposite directions |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR861808A (en) * | 1939-08-02 | 1941-02-18 | Materiel Telephonique | piezoelectric elements |
| US2875354A (en) * | 1954-01-29 | 1959-02-24 | Branson Instr | Piezoelectric transducer |
| DE1108275B (en) * | 1955-09-28 | 1961-06-08 | Gen Electric | Piezoelectric composite body |
| US2978597A (en) * | 1956-03-14 | 1961-04-04 | Harris Transducer Corp | Circuit element transducer |
| US2984111A (en) * | 1959-06-19 | 1961-05-16 | Bosch Arma Corp | Accelerometer |
| US3091707A (en) * | 1960-04-07 | 1963-05-28 | Bell Telephone Labor Inc | Piezoelectric devices utilizing zinc oxide |
| US3093758A (en) * | 1960-04-13 | 1963-06-11 | Bell Telephone Labor Inc | Piezoelectric devices utilizing cadmium sulfide |
| US3090876A (en) * | 1960-04-13 | 1963-05-21 | Bell Telephone Labor Inc | Piezoelectric devices utilizing aluminum nitride |
| US3234488A (en) * | 1960-09-12 | 1966-02-08 | Bell Telephone Labor Inc | Light modulable circuit element |
| DE1209336B (en) * | 1960-12-01 | 1966-01-20 | Bosch Arma Corp | Bending vibration transducer designed as an edge-free circular disc for generating sound vibrations |
| US3408515A (en) * | 1964-10-08 | 1968-10-29 | Bell Telephone Labor Inc | Second overtone dt-cut quartz resonator |
| FR2125759A5 (en) * | 1971-02-19 | 1972-09-29 | Cepe | |
| FR2127184A5 (en) * | 1971-02-26 | 1972-10-13 | Cepe | |
| US3721841A (en) * | 1971-06-16 | 1973-03-20 | Motorola Inc | Contact for piezoelectric crystals |
| US4344010A (en) * | 1979-10-19 | 1982-08-10 | The United States Of America As Represented By The Secretary Of The Army | Acceleration resistant combination of opposite-handed piezoelectric crystals |
| US4365182A (en) * | 1980-10-14 | 1982-12-21 | The United States Of America As Represented By The Secretary Of The Army | Method of fabricating acceleration resistant crystal resonators and acceleration resistant crystal resonators so formed |
| US4649525A (en) * | 1981-12-08 | 1987-03-10 | Mobil Oil Corporation | Shear wave acoustic logging system |
| US4410822A (en) * | 1982-06-17 | 1983-10-18 | The United States Of America As Represented By The Secretary Of The Army | Acceleration-resistant crystal resonator |
| AT389170B (en) * | 1987-11-19 | 1989-10-25 | Avl Verbrennungskraft Messtech | PIEZOELECTRIC MEASURING ELEMENT |
| US5430342A (en) * | 1993-04-27 | 1995-07-04 | Watson Industries, Inc. | Single bar type vibrating element angular rate sensor system |
| EP1406062B1 (en) * | 1997-05-28 | 2012-05-30 | Murata Manufacturing Co., Ltd. | Vibrating gyroscope |
| JP2001036376A (en) * | 1999-07-23 | 2001-02-09 | Murata Mfg Co Ltd | Piezoelectric resonator and piezoelectric component |
| US7548012B2 (en) * | 2003-09-17 | 2009-06-16 | Kistler Holding, Ag | Multi-layer piezoelectric measuring element, and pressure sensor or force sensor comprising such a measuring element |
| EP2356743A1 (en) | 2008-11-07 | 2011-08-17 | Greenray Industries, Inc. | Crystal oscillator with reduced acceleration sensitivity |
| WO2010110918A1 (en) * | 2009-03-26 | 2010-09-30 | Sand9, Inc. | Mechanical resonating structures and methods |
| US9299910B1 (en) | 2012-05-17 | 2016-03-29 | Analog Devices, Inc. | Resonator anchors and related apparatus and methods |
| US9954513B1 (en) | 2012-12-21 | 2018-04-24 | Analog Devices, Inc. | Methods and apparatus for anchoring resonators |
| US9634227B1 (en) | 2013-03-06 | 2017-04-25 | Analog Devices, Inc. | Suppression of spurious modes of vibration for resonators and related apparatus and methods |
-
0
- NL NL65892D patent/NL65892C/xx active
- BE BE468392D patent/BE468392A/xx unknown
-
1943
- 1943-03-04 US US477915A patent/US2410825A/en not_active Expired - Lifetime
-
1944
- 1944-06-13 GB GB11331/44A patent/GB578791A/en not_active Expired
-
1946
- 1946-08-27 FR FR940632D patent/FR940632A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2458176A1 (en) * | 1979-05-29 | 1980-12-26 | Onera (Off Nat Aerospatiale) | Piezoelectric resonator insensitive to acceleration - has pair of elements which rotate in opposite directions |
Also Published As
| Publication number | Publication date |
|---|---|
| NL65892C (en) | |
| US2410825A (en) | 1946-11-12 |
| FR940632A (en) | 1948-12-17 |
| BE468392A (en) |
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