GB697239A - Improvements in or relating to gramophone pick-ups and recording heads - Google Patents
Improvements in or relating to gramophone pick-ups and recording headsInfo
- Publication number
- GB697239A GB697239A GB2450050A GB2450050A GB697239A GB 697239 A GB697239 A GB 697239A GB 2450050 A GB2450050 A GB 2450050A GB 2450050 A GB2450050 A GB 2450050A GB 697239 A GB697239 A GB 697239A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- shaft
- ups
- pick
- stylus
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Recording Measured Values (AREA)
Abstract
697,239. Gramophone pick-ups and recorders. THERMIONIC PRODUCTS, Ltd. Jan. 3, 1952 [Oct. 6, 1950], No. 24500/50. Class 40 (iv). In a pick-up or recorder, a moving coil element comprises a former substantially in the shape of a cross, one limb defining the axis of oscillation and the other carrying the stylus, the coil being disposed diagonally round the junction of the limbs. A non-magnetic shaft 3 carries a needle holder 1 and is bored longitudinally to accommodate a clamping screw 4 and to lead away the ends of the coil or a pair of coils 7 wound round the intersection of members 1 and 3. The shaft 3 together with rubber sleeves 25 is supported by non-magnetic blocks 12-15 in the air-gap between T-shaped pole-pieces 9, 10 associated with a magnet 18, the assembly being secured to a brass plate 11 forming the base of a casing 32. The coil leads are passed through holes in insulating plates 26, 27 to a transformer. The transducer head may be tilted as in Fig. 2, or the stylus may be set at an angle to the shaft 3 as in Fig. 3. Reference is made to Specification 611,184.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2450050A GB697239A (en) | 1950-10-06 | 1950-10-06 | Improvements in or relating to gramophone pick-ups and recording heads |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2450050A GB697239A (en) | 1950-10-06 | 1950-10-06 | Improvements in or relating to gramophone pick-ups and recording heads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB697239A true GB697239A (en) | 1953-09-16 |
Family
ID=10212635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2450050A Expired GB697239A (en) | 1950-10-06 | 1950-10-06 | Improvements in or relating to gramophone pick-ups and recording heads |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB697239A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3040136A (en) * | 1959-01-14 | 1962-06-19 | Joseph F Grado | Electro-mechanical transducer |
-
1950
- 1950-10-06 GB GB2450050A patent/GB697239A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3040136A (en) * | 1959-01-14 | 1962-06-19 | Joseph F Grado | Electro-mechanical transducer |
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