GB520447A - Pick-up for electric sound reproducing apparatus - Google Patents
Pick-up for electric sound reproducing apparatusInfo
- Publication number
- GB520447A GB520447A GB30488/38A GB3048838A GB520447A GB 520447 A GB520447 A GB 520447A GB 30488/38 A GB30488/38 A GB 30488/38A GB 3048838 A GB3048838 A GB 3048838A GB 520447 A GB520447 A GB 520447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- pieces
- pole
- pick
- ups
- 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)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
520,447. Mounting needles in gramophone pick-ups. SCHARF NACHFOLGER GES. FUR RADIO-und PHONOTEILE, GEB. Oct. 21, 1938, No. 30488. Convention date, Nov. 5th, 1937. [Class 40 (ii)] [Also in Group XXXIX] Relates to gramophone pick-ups in which the armature consists of a two-armed lever adapted to oscillate about a central pivot pin in a permanent magnetic field. According to the invention, the needle r, Fig. 2, is directly attached to the armature n by means of an external screw thread made on the needle without reduction of the thickness of its shank and formation of a shoulder, the screw engaging in a threaded hole in one end of the armature. The pick-up shown has a horse-shoe magnet a with fork-shaped pole-pieces b, c. The pole-pieces are fastened by screws g passing through slots in the wall of the pick-up, enabling the pole-pieces to be adjusted laterally to vary the width of the gaps between the poles d,d e,e. The armature n is balanced about a pivot in in resilient bearings l on a transverse rod i, which can be adjusted by screws k on the pole-pieces to adjust the position of the armature in the gaps. The exciting coils o are disposed around the armature between the prongs of the pole-pieces.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE520447X | 1937-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB520447A true GB520447A (en) | 1940-04-24 |
Family
ID=6551046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30488/38A Expired GB520447A (en) | 1937-11-05 | 1938-10-21 | Pick-up for electric sound reproducing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB520447A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466469A (en) * | 1945-10-26 | 1949-04-05 | Nicholls Ralph William | Means for mounting the armature of a magnetic phonograph record reproducer and recording head |
| US2547361A (en) * | 1947-05-19 | 1951-04-03 | Donald J Baker | Pickup head using torsional mount for armatures |
-
1938
- 1938-10-21 GB GB30488/38A patent/GB520447A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466469A (en) * | 1945-10-26 | 1949-04-05 | Nicholls Ralph William | Means for mounting the armature of a magnetic phonograph record reproducer and recording head |
| US2547361A (en) * | 1947-05-19 | 1951-04-03 | Donald J Baker | Pickup head using torsional mount for armatures |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB520447A (en) | Pick-up for electric sound reproducing apparatus | |
| GB588178A (en) | Improvements in or connected with electro-magnetic pick-up devices for use with stringed musical instruments | |
| GB875212A (en) | An electro-mechanical transducer | |
| GB602114A (en) | Improvements in or relating to electrodynamic pickups | |
| GB334551A (en) | Improvements relating to electro-magnetic gramophone pick-ups or recorders | |
| GB626782A (en) | Improvements in or relating to phonograph pickups | |
| GB652026A (en) | Improvements relating to electro-magnetic pick-ups | |
| GB739724A (en) | Improvements in or relating to magnetic recording apparatus | |
| GB950587A (en) | Improvements in or relating to gramophone pick-ups | |
| GB547728A (en) | Improvements relating to electromagnetic telephone instruments | |
| GB657005A (en) | Improvements in and relating to electrical measuring instruments | |
| GB339949A (en) | Improvements in apparatus for the reproduction of music, speech, and the like | |
| GB322813A (en) | Improvements in or relating to electrical pick-ups and like reproducing or recordingdevices | |
| GB418678A (en) | Improvements in electromagnetic pickups | |
| GB499706A (en) | Improvements relating to sound reproducers and recorders | |
| GB337811A (en) | Improvements in mechanism for the reproduction of sound | |
| GB263478A (en) | Loud speakers | |
| GB768578A (en) | Improvements in or relating to moving coil electrical instrument | |
| GB333895A (en) | Electrical pick-ups for gramophones | |
| GB318254A (en) | Improvements in and relating to apparatus for use in the reproduction of sound | |
| GB381275A (en) | Improvements in and relating to gramophone pick-up devices | |
| GB525431A (en) | Improvements in or relating to electrical pick-ups with vibrating armature | |
| GB313406A (en) | Method and apparatus for the electromagnetic reproduction of sound | |
| GB348575A (en) | Improvements in and relating to electric pick-ups | |
| GB315488A (en) | An improved method of electrically reproducing gramophone and like sound records |