GB714939A - Improvements in or relating to sound reproducing devices - Google Patents
Improvements in or relating to sound reproducing devicesInfo
- Publication number
- GB714939A GB714939A GB2864551A GB2864551A GB714939A GB 714939 A GB714939 A GB 714939A GB 2864551 A GB2864551 A GB 2864551A GB 2864551 A GB2864551 A GB 2864551A GB 714939 A GB714939 A GB 714939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystal
- diaphragm
- pad
- casing
- edge
- 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 6
- 238000007789 sealing Methods 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000035939 shock Effects 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)
Abstract
714,939. Earpieces. ROTHERMEL, Ltd. Nov. 25, 1952 [Dec. 6, 1951], No. 28645/51. Class 40 (4) The output of a piezo-electric earpiece is damped, and the crystal protected from shock, by a resilient pad 4 which is interposed between a bender type piezo-electric crystal 5 and a diaphragm 3. As shown in Fig. 1, a rectangular crystal and a sponge rubber pad of somewhat larger dimensions are adhered to the diaphragm which is secured at its edge between a cover plate 11 and a casing 1 with an intermediate rubber sealing band 10. Terminals 6, 7 are provided which may be connected to a high resistance to reduce high frequency response. In a modification, Fig. 2 (not shown) and Fig. 4, a further resilient pad 12 is fitted between the crystal and the casing. A rubber cup 13 may also be substituted for the sealing band and cover the edge of the diaphragm and the crystal, the further pad 12 being optionally provided. According to the Specification the diaphragm may be omitted, the crystal and pad being then mounted on the cover plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2864551A GB714939A (en) | 1951-12-06 | 1951-12-06 | Improvements in or relating to sound reproducing devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2864551A GB714939A (en) | 1951-12-06 | 1951-12-06 | Improvements in or relating to sound reproducing devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB714939A true GB714939A (en) | 1954-09-08 |
Family
ID=10278866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2864551A Expired GB714939A (en) | 1951-12-06 | 1951-12-06 | Improvements in or relating to sound reproducing devices |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB714939A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2530108A1 (en) * | 1982-07-12 | 1984-01-13 | Geophysique Cie Gle | Novel hydrophone |
-
1951
- 1951-12-06 GB GB2864551A patent/GB714939A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2530108A1 (en) * | 1982-07-12 | 1984-01-13 | Geophysique Cie Gle | Novel hydrophone |
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