GB290290A - - Google Patents
Info
- Publication number
- GB290290A GB290290A GB1369828A GB1369828A GB290290A GB 290290 A GB290290 A GB 290290A GB 1369828 A GB1369828 A GB 1369828A GB 1369828 A GB1369828 A GB 1369828A GB 290290 A GB290290 A GB 290290A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- armature
- arms
- magnetic
- rocliing
- 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
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Dc Machiner (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
- Moving Of Heads (AREA)
- Electromagnets (AREA)
Abstract
290,290. Electrical Research Products, Inc., (Assignees of Harrison, H. C.). May 13, 1927, [Convention date]. Magnetic instruments; diaphragms. - An electromagnetic sound recorder comprises a flexible, preferably magnetic, diaphragm 13 clamped over the mouth of a chamber 5 which houses the electromagnet system and is preferably filled with viscous s material 12. An armature 15, secured to the diaphragm, is formed with a pair of narrow arms 16, 17 extending substantially the length of the diameter of the unrestrained portion of the diaphragm and with a stylus supporting lug 20. The arms 16, 17, which provide, with the diaphragm, a rocliing -support for the armature, are sufficiently stiff to prevent rotational movement of the armature in any direction except around an axis parallel to the arms. Specifications 290,264 and 290,559 are referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US191012A US1747829A (en) | 1927-05-13 | 1927-05-13 | Electrical reproducer |
| US205562A US1762991A (en) | 1927-07-14 | 1927-07-14 | Electromagnetic reproducer or recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB290290A true GB290290A (en) | 1929-04-08 |
Family
ID=26886655
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1369828A Expired GB290290A (en) | 1927-05-13 | 1928-01-06 | |
| GB835029A Expired GB307847A (en) | 1927-05-13 | 1928-01-06 | Improvements in electromagnetic devices |
| GB49528A Expired GB290264A (en) | 1927-05-13 | 1928-01-06 | Improvements in electromagnetic devices for recording sound and reproducing sound from records |
| GB49628A Expired GB293847A (en) | 1927-05-13 | 1928-01-06 | Improvements in or relating to electromagnetic devices for recording sound and reproducing sound from records |
Family Applications After (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB835029A Expired GB307847A (en) | 1927-05-13 | 1928-01-06 | Improvements in electromagnetic devices |
| GB49528A Expired GB290264A (en) | 1927-05-13 | 1928-01-06 | Improvements in electromagnetic devices for recording sound and reproducing sound from records |
| GB49628A Expired GB293847A (en) | 1927-05-13 | 1928-01-06 | Improvements in or relating to electromagnetic devices for recording sound and reproducing sound from records |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE573753C (en) |
| GB (4) | GB290290A (en) |
| NL (1) | NL25222C (en) |
-
0
- NL NL25222D patent/NL25222C/xx active
-
1927
- 1927-12-22 DE DEE36673D patent/DE573753C/en not_active Expired
-
1928
- 1928-01-06 GB GB1369828A patent/GB290290A/en not_active Expired
- 1928-01-06 GB GB835029A patent/GB307847A/en not_active Expired
- 1928-01-06 GB GB49528A patent/GB290264A/en not_active Expired
- 1928-01-06 GB GB49628A patent/GB293847A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB293847A (en) | 1929-04-08 |
| NL25222C (en) | |
| DE573753C (en) | 1933-04-05 |
| GB290264A (en) | 1929-04-08 |
| GB307847A (en) | 1930-05-22 |
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