GB647152A - Improvements in electronic transducers - Google Patents
Improvements in electronic transducersInfo
- Publication number
- GB647152A GB647152A GB28496/47A GB2849647A GB647152A GB 647152 A GB647152 A GB 647152A GB 28496/47 A GB28496/47 A GB 28496/47A GB 2849647 A GB2849647 A GB 2849647A GB 647152 A GB647152 A GB 647152A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- movable electrode
- ups
- microphones
- oct
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
- H01J21/06—Tubes with a single discharge path having electrostatic control means only
- H01J21/08—Tubes with a single discharge path having electrostatic control means only with movable electrode or electrodes
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Abstract
647,152. Gramophone pick-ups ; microphones. RADIO CORPORATION OF AMERICA. Oct. 24, 1947, No. 28496. Convention date, Oct. 31, 1946. Drawings to Specification. [Class 40 (iv)] [Also in Group XL (a)] In a transducer of the type comprising a thermionic valve in which one electrode is movable with respect to the other (or others) under the control of mechanical forces applied thereto so as to produce corresponding variations of an electrical current, the movable electrode is tapered in shape. If the valve is a diode the movable electrode is the anode, whereas in the case of a triode or other multielectrode valve the movable electrode is the grid. The movable electrode which is mounted on a metal diaphragm forming part of the wall of the evacuated envelope of the valve may be a wedge-shaped, pyramidal or preferably a conical bar of metal, and has an extension passing through the diaphragm to the exterior of the envelope. In the embodiments described, viz. pick-ups and microphones, mechanical vibrations are applied to the end of this extension by means of a coupling from a stylus or from an acoustically-operated diaphragm respectively. The Specification contains a mathematical analysis of the considerations affecting efficiency.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US706967A US2491390A (en) | 1946-10-31 | 1946-10-31 | Electronic transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB647152A true GB647152A (en) | 1950-12-06 |
Family
ID=24839823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28496/47A Expired GB647152A (en) | 1946-10-31 | 1947-10-24 | Improvements in electronic transducers |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2491390A (en) |
| FR (1) | FR954725A (en) |
| GB (1) | GB647152A (en) |
| NL (1) | NL71653C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2680779A (en) * | 1949-05-06 | 1954-06-08 | Rca Corp | Communication compensation system for atmospheric pressure variation |
| US2666200A (en) * | 1950-11-30 | 1954-01-12 | Rca Corp | Electronic transducer tube |
| US2983790A (en) * | 1953-04-30 | 1961-05-09 | Rca Corp | Electronic sound absorber |
| US2809520A (en) * | 1954-03-01 | 1957-10-15 | Jr Joseph D Richard | Fluid velocity measuring apparatus |
| US2974274A (en) * | 1955-12-13 | 1961-03-07 | Lindberg | Secondary-emission cathode-ray tube and engine analyzer employing the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2142857A (en) * | 1935-05-24 | 1939-01-03 | Gen Electric | Vacuum tube |
| US2165981A (en) * | 1936-08-27 | 1939-07-11 | Julian E Sampson | Electronic phonograph pick-up |
-
0
- NL NL71653D patent/NL71653C/xx active
- FR FR954725D patent/FR954725A/fr not_active Expired
-
1946
- 1946-10-31 US US706967A patent/US2491390A/en not_active Expired - Lifetime
-
1947
- 1947-10-24 GB GB28496/47A patent/GB647152A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2491390A (en) | 1949-12-13 |
| NL71653C (en) | |
| FR954725A (en) | 1950-01-05 |
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