GB387974A - Improvements in electrical reproducers for disc records - Google Patents
Improvements in electrical reproducers for disc recordsInfo
- Publication number
- GB387974A GB387974A GB29159/32A GB2915932A GB387974A GB 387974 A GB387974 A GB 387974A GB 29159/32 A GB29159/32 A GB 29159/32A GB 2915932 A GB2915932 A GB 2915932A GB 387974 A GB387974 A GB 387974A
- Authority
- GB
- United Kingdom
- Prior art keywords
- knife
- edges
- armature
- rubber
- reproducers
- 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
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Motor Or Generator Frames (AREA)
- Vibration Prevention Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
387,974. Gramophone pick-ups. LINDSTROM AKT.-GES., C., 26, Schlesische Strasse, Berlin. Oct. 18, 1932, No. 29159. Convention date, Nov. 23, 1931. [Class 40 (iv).] In a gramophone pick-up having an armature pivoted on knife-edges, the whole knife-edge bearing is enclosed in rubber or like elastic material, to eliminate resonances. The construction shown comprises an armature 1 mounted between two pole-shoes 7 by means of knife-edges 2 engaging bearings 3. Rubber tubes 4 surround the members 3 and the parts of the knife-edges that engage therewith. A leaf spring 5, which rests on the rubber 4, engages with pins 8 on the armature, so as to hold the knife-edges firmly in contact with the bearings 3.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE387974X | 1931-11-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB387974A true GB387974A (en) | 1933-02-16 |
Family
ID=6371215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29159/32A Expired GB387974A (en) | 1931-11-23 | 1932-10-18 | Improvements in electrical reproducers for disc records |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1980137A (en) |
| FR (1) | FR744199A (en) |
| GB (1) | GB387974A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2496484A (en) * | 1946-04-17 | 1950-02-07 | Massa Frank | Magnetostrictive phonograph pickup |
| US2585040A (en) * | 1949-03-23 | 1952-02-12 | Frederick Hart & Co Inc | Electromagnetic recording head |
| US2769038A (en) * | 1952-11-29 | 1956-10-30 | Orton Melvern | Phonograph pickup and the like |
-
0
- FR FR744199D patent/FR744199A/fr not_active Expired
-
1932
- 1932-10-18 GB GB29159/32A patent/GB387974A/en not_active Expired
- 1932-10-25 US US639507A patent/US1980137A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1980137A (en) | 1934-11-06 |
| FR744199A (en) | 1933-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB387974A (en) | Improvements in electrical reproducers for disc records | |
| GB301158A (en) | Improvements in pick-up devices for use with gramophones and the like | |
| CA538149A (en) | Phonograph with pick-up operated by record insertion | |
| GB359334A (en) | Improvements in or relating to electrical sound reproducing or recording apparatus | |
| GB342163A (en) | Ball bearing arrangement, more particularly for the tone arm of talking machines | |
| GB370352A (en) | Improvements in or relating to apparatus for the recording or reproduction of sound | |
| GB193026A (en) | Improvements in sound boxes for talking machines and the like | |
| GB739858A (en) | Improvements in and relating to adaptors for gramophone records | |
| GB423406A (en) | Improvements in and relating to sound reproducing devices | |
| GB276708A (en) | Improvements in sound recorders and reproducers | |
| GB364695A (en) | Improvements in driving devices for sound reproducing apparatus | |
| GB300490A (en) | Improvements in apparatus for use in the electric reproduction of sound from disc orequivalent sound records | |
| GB647826A (en) | Improvements in or relating to phonographs | |
| GB388729A (en) | Improvements in or relating to sound recording or reproducing devices | |
| GB300704A (en) | Improvements in sound-reproducing instruments | |
| GB859371A (en) | Improvements relating to record changing phonographs | |
| GB276971A (en) | Improvements in and connected with the sound boxes of talking machines | |
| GB652097A (en) | Improvements in or relating to a means and method of supporting records in an automatic record changer having a drop-type spindle assembly | |
| GB368344A (en) | Improvements relating to conical diaphragms for sound reproducing and recording apparatus | |
| GB222531A (en) | Loud-speaking apparatus of the electro-magnetic type | |
| GB334003A (en) | Improvements in gramophones and records therefor | |
| GB814654A (en) | Improvements in or relating to stylus carriers for gramophone record players | |
| GB253749A (en) | Improved pocket-size phonograph | |
| GB328221A (en) | Improvements relating to gramophone stylus arms | |
| GB377191A (en) | Improvements in sound recording and sound-reproducing machines |