GB845904A - A device for the production or playing back of a two-signal grooved sound track - Google Patents
A device for the production or playing back of a two-signal grooved sound trackInfo
- Publication number
- GB845904A GB845904A GB829157A GB829157A GB845904A GB 845904 A GB845904 A GB 845904A GB 829157 A GB829157 A GB 829157A GB 829157 A GB829157 A GB 829157A GB 845904 A GB845904 A GB 845904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- needle
- tube
- lobes
- former
- 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
- H04R9/16—Gramophone pick-ups using a stylus; Recorders using a stylus signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
- Position Input By Displaying (AREA)
Abstract
845,904. Stereophonic pick-ups. TELDEC TELEFUNKEN SCHALLPLATTEN G.m.b.H. March 13, 1957 [March 16, 1956], No. 8291/57. Class 40 (4). A moving coil transducer for the simultaneous reproduction or recording of vertical and lateral cuts in a single groove has a magnetic system with an air gap bounded by parallel conical surfaces on the polepieces, a first coil wound in a circle lying in the air gap for vertical movements of a needle, and a second coil wound as a figure of eight, so that its halves form semi-circles with the cross-over at a common diameter, for lateral movements of the needle. As illustrated the needle 2 is mounted on a flexible tube 9 secured in a block 10 of a tone arm. The needle projects as little as possible to reduce torsion of the tube 9. A coil former 11 with a flared skirt is mounted on the tube 9. Coil 12 is wound on the outside of the former with full turns while the inside of the former carries lobes 13, 14, of a coil with cross-over connections lying in a slot in the polepiece N cut parallel to the tube 9. Vertical movement of the coils induces voltage in coil 12 but the voltages induced in lobes 13 and 14 cancel. Lateral movement of the coils changes no flux through coil 12 but produces aiding voltages in lobes 13, 14. The combination of a circular with a figure of eight coil is described and claimed in Specification 816,678.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DET11989A DE1026981B (en) | 1956-03-16 | 1956-03-16 | Mechanical-electrical converter for the generation or scanning of a grooved sound track |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB845904A true GB845904A (en) | 1960-08-24 |
Family
ID=7546881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB829157A Expired GB845904A (en) | 1956-03-16 | 1957-03-13 | A device for the production or playing back of a two-signal grooved sound track |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE1026981B (en) |
| FR (1) | FR1171607A (en) |
| GB (1) | GB845904A (en) |
| NL (1) | NL99355C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL112985C (en) * | 1958-06-20 | |||
| DE1129718B (en) * | 1958-07-14 | 1962-05-17 | Georg Neumann Lab Fuer Elektro | Electrodynamic pickup or cutting box |
| NL244111A (en) * | 1958-10-09 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE654353C (en) * | 1934-09-29 | 1937-12-23 | Electrical Res Prod Inc | Groove tone scanner for Berlin and Edison script |
-
0
- NL NL99355D patent/NL99355C/xx active
-
1956
- 1956-03-16 DE DET11989A patent/DE1026981B/en active Pending
-
1957
- 1957-03-13 GB GB829157A patent/GB845904A/en not_active Expired
- 1957-03-16 FR FR1171607D patent/FR1171607A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1171607A (en) | 1959-01-28 |
| DE1026981B (en) | 1958-03-27 |
| NL99355C (en) |
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