GB602114A - Improvements in or relating to electrodynamic pickups - Google Patents
Improvements in or relating to electrodynamic pickupsInfo
- Publication number
- GB602114A GB602114A GB21917/45A GB2191745A GB602114A GB 602114 A GB602114 A GB 602114A GB 21917/45 A GB21917/45 A GB 21917/45A GB 2191745 A GB2191745 A GB 2191745A GB 602114 A GB602114 A GB 602114A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- coil
- cushion
- polepieces
- members
- 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)
- Moving Of Heads (AREA)
- Electromagnets (AREA)
Abstract
602,114. Gramophone pick-ups. SOUNDSCRIBER CORPORATION. Aug. 27, 1945, No. 21917. Convention date, Aug. 8, 1944. [Class 40 (iv)] In a moving coil gramophone pick-up, means secured to the magnetic frame restrain the rear of the armature which carries the coil from undesirable vertical vibrations. As shown in Figs. 1 and 2, a pair of Z-shaped magnetic frame members 11, 12 having polepieces 13, 14 are clamped to a magnet block 10. Between the polepieces is mounted an armature A preferably of plastic material, the square end lug 30 of which fits into an aperture in a front cushion member 21 mounted on the ends of the polepieces. The rear of the armature is supported by another cushion 23 fitted to one of the fixing screws of the members 11, 12. Mounted on the armature are a stylus 32 and the coil 37 with its iron core 38. Provision is also made for a " hum-bucking" coil 3 to be fitted on the armature to compensate for disturbance due to stray fields. A transverse brass wire 45 (Fig. 5), the ends of which are cemented to the members 11, 12, engages the rear cushion 23 and prevents undesirable vertical movement of the armature. This wire also maintains the central slit 28 of the cushion closed about the rear lug 31 of the armature. Specification 539,534, [Group XXXVIII], is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US548583A US2416082A (en) | 1944-08-08 | 1944-08-08 | Humless electrodynamic pickup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB602114A true GB602114A (en) | 1948-05-20 |
Family
ID=24189488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21917/45A Expired GB602114A (en) | 1944-08-08 | 1945-08-27 | Improvements in or relating to electrodynamic pickups |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2416082A (en) |
| GB (1) | GB602114A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2542457A (en) * | 1946-12-31 | 1951-02-20 | Soundscriber Corp | Electrodynamic pickup |
| US2593633A (en) * | 1947-04-29 | 1952-04-22 | Decca Record Co Ltd | Electrodynamic phonograph pickup |
| US2535479A (en) * | 1947-05-20 | 1950-12-26 | Mallory & Co Inc P R | Magnetic pickup |
| US2686270A (en) * | 1948-12-30 | 1954-08-10 | Rca Corp | Electrical input circuit with noise reducing means |
| GB687363A (en) * | 1949-05-04 | 1953-02-11 | Hans Christian Hansen | Improvements in electrodynamic pick-up's |
| US2767253A (en) * | 1952-02-01 | 1956-10-16 | Armour Res Found | Compensating device for a magnetic recording-reproducing head |
| US2847506A (en) * | 1955-09-15 | 1958-08-12 | Remler Company Ltd | Receiver amplifier |
| US3067295A (en) * | 1958-08-04 | 1962-12-04 | Pickering & Co Inc | Stereophonic phonograph pick-up device |
| DE1134527B (en) * | 1960-01-30 | 1962-08-09 | Georg Neumann | Electromechanical converter with negative feedback for recording and reproducing sound vibrations in single-component writing |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB396875A (en) * | 1932-04-20 | 1933-08-17 | Albert Edwin Bowyer Lowe | Improvements in electromagnetic pick-ups for gramophones |
| GB416574A (en) * | 1933-02-13 | 1934-09-13 | Emi Ltd | Improvements in and relating to electromagnetic vibratory devices for use in the electrical reproduction of sound |
| US2105167A (en) * | 1935-10-31 | 1938-01-11 | Rca Corp | Sound recording and reproducing apparatus |
| US2148796A (en) * | 1937-05-18 | 1939-02-28 | Amperite Company | Phonograph pick-up |
| US2290057A (en) * | 1938-09-12 | 1942-07-14 | Jr Theodore Lindenberg | Sound recording and reproducing mechanism |
| BE473416A (en) * | 1939-01-13 | |||
| US2275309A (en) * | 1940-08-03 | 1942-03-03 | Dictaphone Corp | Reproducer for electric phonographs |
-
1944
- 1944-08-08 US US548583A patent/US2416082A/en not_active Expired - Lifetime
-
1945
- 1945-08-27 GB GB21917/45A patent/GB602114A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2416082A (en) | 1947-02-18 |
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