GB324608A - Improvements relating to loud speakers - Google Patents
Improvements relating to loud speakersInfo
- Publication number
- GB324608A GB324608A GB1914729A GB1914729A GB324608A GB 324608 A GB324608 A GB 324608A GB 1914729 A GB1914729 A GB 1914729A GB 1914729 A GB1914729 A GB 1914729A GB 324608 A GB324608 A GB 324608A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frame
- lever
- armature
- gardner
- spring
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
324,608. Gardner, C. A., and Gardner, A. C. June 21, 1929. Magnetic instruments. - A four-pole magnet system for loud-speakers comprises an armature e mounted on a frame f connected to the diaphragm j by a rod i and carried on the end of a lever k which does not vibrate with the transmission end of the frame but can be adjusted about its fulcrum point m to adjust the armature setting without varying the stress in the frame. One side of the lever k is loaded by a spring n and the other side by an adjustable, spring-controlled, screwed abutment piece o, the movement of the lever by the screw o being limited by a stop q on the cover plate r. The armature is surrounded by a coil g and vibrates between pole pieces b carried by magnets c screwed to the non-magnetic frame a.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1914729A GB324608A (en) | 1929-06-21 | 1929-06-21 | Improvements relating to loud speakers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1914729A GB324608A (en) | 1929-06-21 | 1929-06-21 | Improvements relating to loud speakers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB324608A true GB324608A (en) | 1930-01-30 |
Family
ID=10124520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1914729A Expired GB324608A (en) | 1929-06-21 | 1929-06-21 | Improvements relating to loud speakers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB324608A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1158115B (en) * | 1961-10-07 | 1963-11-28 | Sennheiser Electronic | Miniature microphone |
DE1179256B (en) * | 1963-04-13 | 1964-10-08 | Lehner Fernsprech Signal | Four-pole drive system for electro-acoustic converters |
-
1929
- 1929-06-21 GB GB1914729A patent/GB324608A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1158115B (en) * | 1961-10-07 | 1963-11-28 | Sennheiser Electronic | Miniature microphone |
DE1179256B (en) * | 1963-04-13 | 1964-10-08 | Lehner Fernsprech Signal | Four-pole drive system for electro-acoustic converters |
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