GB260148A - Improvements in and relating to electromagnetic apparatus for the interconversion ofelectrical and mechanical oscillations - Google Patents
Improvements in and relating to electromagnetic apparatus for the interconversion ofelectrical and mechanical oscillationsInfo
- Publication number
- GB260148A GB260148A GB4461/26A GB446126A GB260148A GB 260148 A GB260148 A GB 260148A GB 4461/26 A GB4461/26 A GB 4461/26A GB 446126 A GB446126 A GB 446126A GB 260148 A GB260148 A GB 260148A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- coil
- shaft
- magnet
- pole
- 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
- 230000010358 mechanical oscillation Effects 0.000 title 1
- 238000013016 damping Methods 0.000 abstract 2
- 230000004907 flux Effects 0.000 abstract 1
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
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/16—Mounting or connecting stylus to transducer with or without damping means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
-
- 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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
- H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Electromagnets (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
260,148. British Thomson-Houston Co., Ltd., (Assignees of Kellogg, E. W.). Dec. 1, 1925, [Convention date]. Gramophone pick-ups; magnetic instruments.- Apparatus having a coil in the flux path of a magnet is provided with an armature having a rigid shaft mounted in resilient bearings and arranged so that its rocking axis is at the centre of mass of the armature and shaft. As applied for reproducing sound from records, the armature 11, Figs. 3 and 4, extends through a coil 12 arranged between the U-shaped poles 10 of a magnet 7 secured by screws 8 to a back plate 5 and enclosed by a cover plate 6. The shaft 17 of the armature is of square section, and is covered with rubber sleeves 18 and mounted between opposing V-shaped recesses in the pole-pieces, or is engaged by a V-recess in a spring to provide the necessary resiliency and damping. Further damping may be secured by rubber blocks 21 arranged in grooves in the pole-pieces adjacent the upper end of the armature. The coil wires are connected to terminals on an insulating block 14 from which leads pass through the tubular extension of the back plate to amplifying devices and a loudspeaker.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72541A US1783044A (en) | 1925-12-01 | 1925-12-01 | Reproducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB260148A true GB260148A (en) | 1926-10-28 |
Family
ID=22108258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4461/26A Expired GB260148A (en) | 1925-12-01 | 1926-02-16 | Improvements in and relating to electromagnetic apparatus for the interconversion ofelectrical and mechanical oscillations |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1783044A (en) |
| DE (1) | DE515378C (en) |
| GB (1) | GB260148A (en) |
| NL (1) | NL24797C (en) |
-
0
- NL NL24797D patent/NL24797C/xx active
-
1925
- 1925-12-01 US US72541A patent/US1783044A/en not_active Expired - Lifetime
-
1926
- 1926-02-16 GB GB4461/26A patent/GB260148A/en not_active Expired
- 1926-12-01 DE DEA49358D patent/DE515378C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1783044A (en) | 1930-11-25 |
| NL24797C (en) | |
| DE515378C (en) | 1930-12-31 |
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