GB461234A - Improvements in or relating to sound translating devices - Google Patents
Improvements in or relating to sound translating devicesInfo
- Publication number
- GB461234A GB461234A GB27437/36A GB2743736A GB461234A GB 461234 A GB461234 A GB 461234A GB 27437/36 A GB27437/36 A GB 27437/36A GB 2743736 A GB2743736 A GB 2743736A GB 461234 A GB461234 A GB 461234A
- Authority
- GB
- United Kingdom
- Prior art keywords
- microphone
- microphones
- transformer
- condenser
- type
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
461,234. Microphones. ELECTRICAL RESEARCH PRODUCTS, Inc. Oct. 9, 1936, No. 27437. Convention date, July 30. [Class 40 (iv)] A velocity-type microphone and a pressuretype microphone are associated with a single amplifier, preferably in a single structure. In the apparatus shown, the velocity-type microphone 10 comprises a conductive ribbon diaphragm 34 supported between polepieces 31 fixed to the limbs of a U-shaped magnet 30, whilst the pressure-type microphone 11 is of condenser-type and is mounted on the cross-bar 36 of an H-shaped support 37 fixed to the magnet. The microphones are mounted in an apertured extension 44 of a casing 43 containing an amplifier 24, Fig. 2, transformer 13, resistances 19, 26, condenser 23, and switches 16, 21.. The microphones 10, 11 are connected respectively to the primary and secondary windings of the transformer 13 as shown, and the switches enable either to be used separately by shortcircuiting the secondary winding of the transformer or removing the polarizing voltage from the condenser microphone.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US93355A US2093664A (en) | 1936-07-30 | 1936-07-30 | Acoustic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB461234A true GB461234A (en) | 1937-02-12 |
Family
ID=22238459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27437/36A Expired GB461234A (en) | 1936-07-30 | 1936-10-09 | Improvements in or relating to sound translating devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2093664A (en) |
| GB (1) | GB461234A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB611209A (en) * | 1944-08-29 | 1948-10-27 | Standard Telephones Cables Ltd | Improvements in or relating to microphones |
| US2699474A (en) * | 1950-12-29 | 1955-01-11 | Rca Corp | Velocity microphone |
| US3435143A (en) * | 1965-08-02 | 1969-03-25 | Charles P Fisher | Ribbon microphone |
| US7889882B2 (en) * | 2006-12-20 | 2011-02-15 | Leonard Marshall | Selectable diaphragm condenser microphone |
-
1936
- 1936-07-30 US US93355A patent/US2093664A/en not_active Expired - Lifetime
- 1936-10-09 GB GB27437/36A patent/GB461234A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2093664A (en) | 1937-09-21 |
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