GB521435A - Improvements in or relating to piezo-electric devices - Google Patents
Improvements in or relating to piezo-electric devicesInfo
- Publication number
- GB521435A GB521435A GB12039/39A GB1203939A GB521435A GB 521435 A GB521435 A GB 521435A GB 12039/39 A GB12039/39 A GB 12039/39A GB 1203939 A GB1203939 A GB 1203939A GB 521435 A GB521435 A GB 521435A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piezo
- plates
- shows
- clamped
- crystal unit
- 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 abstract 2
- 238000007789 sealing Methods 0.000 abstract 2
- 239000002184 metal Substances 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Piezo-Electric Transducers For Audible Bands (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
521,435. Piezo-electric instruments. BRUSH CRYSTAL CO., Ltd. April 21. 1939, No. 12039. Convention date April 22, 1938. [Class 40 (iv)] [Also in Group XL] Fig. 3 shows a piezo-electric crystal unit 1a mounted at three corners between rubber plates 3 clamped between metal cover plates 5, the fourth corner which is free to vibrate being attached to a wire 4 extending through flexible sealing 9 in the upper cover plate 5'to the diaphragm of a loud-speaker. A central rigid plate 2 has an extension 2b forming a support for the terminals 7. Fig. 10 shows a gramophone pick-up in which the crystal unit of trapezoidal shape is held at one edge between yielding plates 29 and has its opposite edge clamped to a flexible torsion shaft 32 which is mounted in sealing gaskets 36 and carries a stylus arm 34.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US203488A US2222056A (en) | 1938-04-22 | 1938-04-22 | Piezoelectric device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB521435A true GB521435A (en) | 1940-05-21 |
Family
ID=22754212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12039/39A Expired GB521435A (en) | 1938-04-22 | 1939-04-21 | Improvements in or relating to piezo-electric devices |
Country Status (2)
Country | Link |
---|---|
US (1) | US2222056A (en) |
GB (1) | GB521435A (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2594948A (en) * | 1947-10-30 | 1952-04-29 | Brush Dev Co | Electromechanical transducer unit |
US2547227A (en) * | 1948-11-09 | 1951-04-03 | Philco Corp | Phonograph pickup having a quadrilateral crystal with only one corner free to flex |
DE959559C (en) * | 1948-11-12 | 1957-03-07 | Paul Beerwald | Device for converting mechanical vibrations into electrical ones and vice versa |
US3091708A (en) * | 1956-03-14 | 1963-05-28 | Harris Transducer Corp | Circuit element transducer |
US2983902A (en) * | 1956-03-30 | 1961-05-09 | Philipps Electronics Corp | Crystal vibrated reed and receiver |
US3073975A (en) * | 1958-12-23 | 1963-01-15 | Rca Corp | Crystal unit |
NL251123A (en) * | 1960-02-06 | |||
US3173035A (en) * | 1960-10-17 | 1965-03-09 | Midland Mfg Company Division O | Miniaturized piezoelectric crystal device |
US3562451A (en) * | 1968-06-11 | 1971-02-09 | Us Navy | Microphone and headset for underwater swimmer |
-
1938
- 1938-04-22 US US203488A patent/US2222056A/en not_active Expired - Lifetime
-
1939
- 1939-04-21 GB GB12039/39A patent/GB521435A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2222056A (en) | 1940-11-19 |
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