GB336648A - Improvements in and relating to electrical sound reproducing instruments - Google Patents
Improvements in and relating to electrical sound reproducing instrumentsInfo
- Publication number
- GB336648A GB336648A GB2168729A GB2168729A GB336648A GB 336648 A GB336648 A GB 336648A GB 2168729 A GB2168729 A GB 2168729A GB 2168729 A GB2168729 A GB 2168729A GB 336648 A GB336648 A GB 336648A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- stylus
- tube
- coils
- spindle
- 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
Abstract
336,648. Holman, H. E. July 15, 1929. Gramophone pick - ups; magnetic instruments.-The armature of a gramophone pick-up is formed by a permanent magnet having a stylus engaging parts so shaped as to hold the stylus securely in position, during operation, due to the reaction between the stylus and the record. The armature a, Fig. 1, consists of a tube of highly magnetic material, e.g. cobalt steel, and the stylus b is located at one end e in a V-shaped or other opening f, Fig. 2, and at the other end c in a narrowed portion of the armature tube provided by a bush d, Fig. 1; or the tube may be reduced or swaged in as at c, Fig. 3. The magnetized armature holds the stylus in position when not recording. The armature is preferably mounted in a stirrup g, Fig. 5, provided with radial arms h which are clamped as in Fig. 3; or a spindle may be bored in the middle to receive the armature and the spindle clamped between rubber pads. The magnetized armature oscillates relatively to coils m, Fig. 8, mounted on supports n; or the coils m may be disposed on arms of an iron circuit o, Fig. 10. Specification 302,216, [Class 40 (ii), Phonographs &c.], is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2168729A GB336648A (en) | 1929-07-15 | 1929-07-15 | Improvements in and relating to electrical sound reproducing instruments |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2168729A GB336648A (en) | 1929-07-15 | 1929-07-15 | Improvements in and relating to electrical sound reproducing instruments |
Publications (1)
Publication Number | Publication Date |
---|---|
GB336648A true GB336648A (en) | 1930-10-15 |
Family
ID=10167138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2168729A Expired GB336648A (en) | 1929-07-15 | 1929-07-15 | Improvements in and relating to electrical sound reproducing instruments |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB336648A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2501233A (en) * | 1945-03-14 | 1950-03-21 | Decca Record Co Ltd | Phonograph pickup having permanent magnet armature |
US2507708A (en) * | 1945-12-22 | 1950-05-16 | Pennsylvania Electronics Inc | Phonograph pickup having permanent magnet armature |
US2581511A (en) * | 1947-12-31 | 1952-01-08 | Donald J Baker | Magnetic phonograph pickup |
US3055988A (en) * | 1957-04-08 | 1962-09-25 | Shure Bros | Magnetic phonograph pickup |
US3077522A (en) * | 1959-02-27 | 1963-02-12 | Shure Bros | Stereophonic pickup cartridge |
US3077521A (en) * | 1958-03-06 | 1963-02-12 | Shure Bros | Stereophonic moving magnet phonograph pickup |
US3463889A (en) * | 1957-10-30 | 1969-08-26 | Shure Bros | Moving magnet stereophonic pickup |
US3576956A (en) * | 1958-06-20 | 1971-05-04 | Philips Corp | Stereophonic phonograph transducer |
US3614332A (en) * | 1958-10-03 | 1971-10-19 | Motohiro Nagasaki | Electromagnetic stereophonic phonograph pickup |
-
1929
- 1929-07-15 GB GB2168729A patent/GB336648A/en not_active Expired
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2501233A (en) * | 1945-03-14 | 1950-03-21 | Decca Record Co Ltd | Phonograph pickup having permanent magnet armature |
US2507708A (en) * | 1945-12-22 | 1950-05-16 | Pennsylvania Electronics Inc | Phonograph pickup having permanent magnet armature |
US2581511A (en) * | 1947-12-31 | 1952-01-08 | Donald J Baker | Magnetic phonograph pickup |
US3055988A (en) * | 1957-04-08 | 1962-09-25 | Shure Bros | Magnetic phonograph pickup |
US3463889A (en) * | 1957-10-30 | 1969-08-26 | Shure Bros | Moving magnet stereophonic pickup |
US3077521A (en) * | 1958-03-06 | 1963-02-12 | Shure Bros | Stereophonic moving magnet phonograph pickup |
US3576956A (en) * | 1958-06-20 | 1971-05-04 | Philips Corp | Stereophonic phonograph transducer |
US3614332A (en) * | 1958-10-03 | 1971-10-19 | Motohiro Nagasaki | Electromagnetic stereophonic phonograph pickup |
US3077522A (en) * | 1959-02-27 | 1963-02-12 | Shure Bros | Stereophonic pickup cartridge |
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