GB368112A - Improvements in and relating to sound reproducing apparatus - Google Patents
Improvements in and relating to sound reproducing apparatusInfo
- Publication number
- GB368112A GB368112A GB1072031A GB1072031A GB368112A GB 368112 A GB368112 A GB 368112A GB 1072031 A GB1072031 A GB 1072031A GB 1072031 A GB1072031 A GB 1072031A GB 368112 A GB368112 A GB 368112A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- plate
- swash
- relating
- pieces
- 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
368,112. Loud-speakers. KOLSTERBRANDES, Ltd. and STRAFFORD, F. R. W., Cray Works, Sidcup, Kent. April 11, 1931, No. 10720. [Class 40 (iv).] In a moving-armature electro-acoustic device, one end of the armature is fixed and the position of the other is adjustable by a facecam or swash-plate. As shown, the armature 7 is clamped at one end by bolts 8 to a supporting member 6, and an extension 9 thereof is covered at its extremity by a rubber buffer 24 which co-operates with a swash-plate 10 controlled by knob 15. A flat spring 26 presses on to the buffer 24 holding it in contact with the plate 10 to prevent chattering. The bar magnet 21 supports yoke pieces 4, 4<1>, composed of laminations riveted between brass sidepieces 22, and supporting the polepieces 27, 28. The various parts are bolted together and to two cross-pieces 19, 20 bolted to a base 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1072031A GB368112A (en) | 1931-04-11 | 1931-04-11 | Improvements in and relating to sound reproducing apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1072031A GB368112A (en) | 1931-04-11 | 1931-04-11 | Improvements in and relating to sound reproducing apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
GB368112A true GB368112A (en) | 1932-03-03 |
Family
ID=9973036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1072031A Expired GB368112A (en) | 1931-04-11 | 1931-04-11 | Improvements in and relating to sound reproducing apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB368112A (en) |
-
1931
- 1931-04-11 GB GB1072031A patent/GB368112A/en not_active Expired
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