GB294877A - - Google Patents
Info
- Publication number
- GB294877A GB294877A GB18724/28A GB1872428A GB294877A GB 294877 A GB294877 A GB 294877A GB 18724/28 A GB18724/28 A GB 18724/28A GB 1872428 A GB1872428 A GB 1872428A GB 294877 A GB294877 A GB 294877A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reed
- pieces
- carry
- coils
- magnetic bridge
- 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
294,877. Kunze, W., and Radiofrequenz Ges. July 30, 1927, [Convention date]. Magnetic instruments.-An actuating device for a loud-speaker comprises a reed, one end of which is clamped whilst its other end is adapted to vibrate between magnet pole-pieces, one or both of which carry the actuating coils, the reed being coupled to an external non-magnetic bridge member which is supported at both ends. Fig. 1 shows a construction in which a reed B is clamped at one end between horseshoe magnets A, its other end being adapted to vibrate between the magnet pole-pieces C which carry coils D. A rod F, carrying at its outer end a conical diaphragm Q, connects the reed with a non-magnetic bridge E placed across the limbs of the magnets. In the modified construction, Fig. 2, one of the pole-pieces J is made larger so as to carry the coils H, accurate adjustment of the reed L in the gap between the polepieces J, K being effected by means of a screw N. The tension of the non-magnetic bridge O can be adjusted by means of a screw P so as to vary the pitch of the loud-speaker.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE294877T | 1927-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB294877A true GB294877A (en) | 1929-08-15 |
Family
ID=31894088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18724/28A Expired GB294877A (en) | 1927-07-30 | 1928-06-28 |
Country Status (4)
Country | Link |
---|---|
US (1) | US1716893A (en) |
BE (1) | BE351040A (en) |
FR (1) | FR661622A (en) |
GB (1) | GB294877A (en) |
-
0
- BE BE351040D patent/BE351040A/xx unknown
-
1928
- 1928-05-19 FR FR661622D patent/FR661622A/en not_active Expired
- 1928-06-28 GB GB18724/28A patent/GB294877A/en not_active Expired
- 1928-07-25 US US295272A patent/US1716893A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1716893A (en) | 1929-06-11 |
FR661622A (en) | 1929-07-27 |
BE351040A (en) |
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