GB479637A - Improvements in or relating to piezoelectric crystals - Google Patents
Improvements in or relating to piezoelectric crystalsInfo
- Publication number
- GB479637A GB479637A GB4298/37A GB429837A GB479637A GB 479637 A GB479637 A GB 479637A GB 4298/37 A GB4298/37 A GB 4298/37A GB 429837 A GB429837 A GB 429837A GB 479637 A GB479637 A GB 479637A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- frequency
- piezo
- thinning
- electrode
- 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 8
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
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/09—Elastic or damping supports
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/15—Constructional features of resonators consisting of piezoelectric or electrostrictive material
- H03H9/17—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator
- H03H9/19—Constructional features of resonators consisting of piezoelectric or electrostrictive material having a single resonator consisting of quartz
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Insulated Conductors (AREA)
Abstract
479,637. Piezo - electric crystals. STANDARD TELEPHONES & CABLES, Ltd. Feb. 12, 1937, No. 4298. Convention date, May 1, 1936. Drawings to Specifleation. [Class 40 (v)] A piezo-electric crystal has its temperature coefficient of frequency adjusted by thinning at the edges so as to vary slightly the angle # between the major surface and the Z-axis. This has little effect on frequency which may, however, be adjusted by concaving the surfaces or by thinning the crystal as a whole. The angle # is selected within a range +36À5 to +39 or - 51 to - 53 according to the working temperature of the crystal, Figs. 12, 13 (not shown). The thickness is then selected to give the required frequency. One electrode is preferably convex, making contact with the crystal at a node, and the other electrode is preferably spaced 0À002" from the crystal to prevent arcing. The crystal preferably vibrates in a face shear mode. Specification 471,465 is referred to.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US75727A US2123236A (en) | 1936-04-22 | 1936-04-22 | Crystal holder |
US77325A US2268365A (en) | 1936-04-22 | 1936-05-01 | Piezoelectric apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB479637A true GB479637A (en) | 1938-02-09 |
Family
ID=41119701
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4298/37A Expired GB479637A (en) | 1936-04-22 | 1937-02-12 | Improvements in or relating to piezoelectric crystals |
GB4297/37A Expired GB471465A (en) | 1936-04-22 | 1937-02-12 | Improvements in or relating to piezo electric crystal devices |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4297/37A Expired GB471465A (en) | 1936-04-22 | 1937-02-12 | Improvements in or relating to piezo electric crystal devices |
Country Status (4)
Country | Link |
---|---|
US (2) | US2123236A (en) |
DE (2) | DE735908C (en) |
FR (1) | FR820889A (en) |
GB (2) | GB479637A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2482828A (en) * | 1945-04-03 | 1949-09-27 | Us Sec War | Mounting for piezo electric elements |
US2437218A (en) * | 1946-01-28 | 1948-03-02 | Premier Crystal Lab Inc | Method and means for mounting piezo crystal plates |
GB679575A (en) * | 1950-01-20 | 1952-09-17 | Standard Telephones Cables Ltd | Improvements in or relating to piezo-electric crystal plates |
US2931924A (en) * | 1958-06-25 | 1960-04-05 | Philip A Simpson | Quartz oscillator unit for operation at low temperatures |
US3201984A (en) * | 1962-03-19 | 1965-08-24 | Bendix Corp | Electric sensors and circuits |
FR2462055A1 (en) * | 1979-07-18 | 1981-02-06 | France Etat | AUTOTHERMOSTATE HIGH FREQUENCY OSCILLATOR |
US4373119A (en) * | 1980-12-05 | 1983-02-08 | Motorola, Inc. | Adjustable transducer |
JPS5984921U (en) * | 1982-11-27 | 1984-06-08 | 株式会社村田製作所 | Oscillator support structure |
JPH06350376A (en) * | 1993-01-25 | 1994-12-22 | Matsushita Electric Ind Co Ltd | Piezoelectric device air-tightly sealed and air-tight sealing package |
EP0651449B1 (en) * | 1993-11-01 | 2002-02-13 | Matsushita Electric Industrial Co., Ltd. | Electronic component and method for producing the same |
DE69409215T2 (en) * | 1993-12-06 | 1998-07-16 | Matsushita Electric Ind Co Ltd | Hybrid magnetic structure and its manufacturing process |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB239175A (en) * | 1924-08-26 | 1926-09-30 | Western Electric Co Ltd | Improvements in piezo-electric frequency control devices |
US1925577A (en) * | 1930-10-17 | 1933-09-05 | American Optical Corp | Oscillating crystal |
US2018246A (en) * | 1934-10-09 | 1935-10-22 | Westinghouse Electric & Mfg Co | Quartz crystal manufacture |
-
1936
- 1936-04-22 US US75727A patent/US2123236A/en not_active Expired - Lifetime
- 1936-05-01 US US77325A patent/US2268365A/en not_active Expired - Lifetime
-
1937
- 1937-02-12 GB GB4298/37A patent/GB479637A/en not_active Expired
- 1937-02-12 GB GB4297/37A patent/GB471465A/en not_active Expired
- 1937-04-21 FR FR820889D patent/FR820889A/en not_active Expired
- 1937-04-27 DE DEI57848D patent/DE735908C/en not_active Expired
- 1937-04-28 DE DEJ61955A patent/DE756196C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR820889A (en) | 1937-11-20 |
US2268365A (en) | 1941-12-30 |
GB471465A (en) | 1937-09-06 |
DE735908C (en) | 1943-06-01 |
US2123236A (en) | 1938-07-12 |
DE756196C (en) | 1953-02-16 |
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