GB589272A - Phonograph pick-up-device - Google Patents
Phonograph pick-up-deviceInfo
- Publication number
- GB589272A GB589272A GB7145/45A GB714545A GB589272A GB 589272 A GB589272 A GB 589272A GB 7145/45 A GB7145/45 A GB 7145/45A GB 714545 A GB714545 A GB 714545A GB 589272 A GB589272 A GB 589272A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stylus
- coil
- polepiece
- resilient material
- cut
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/16—Mounting or connecting stylus to transducer with or without damping means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Springs (AREA)
- Moving Of Heads (AREA)
Abstract
589,272. Phonograph pick-ups. PHILCO RADIO & TELEVISION CORPORATION. March 21, 1945, No. 7145. Convention date, March 31, 1944. [Class 40 (iv)] [Also in Group XXXVIII] In a moving-coil pick-up for lateral-cut recordings, in which the moving coil 5 is mounted on resilient members 11 and 12 on a circular polepiece 3 within two arcuate polepieces (not shown) which complete the magnetic gap, the coil is vibrated torsionally about a diametrical axis 7 by a stylus 13 which passes freely through the apex 5b of a conical former 6 carrying the coil 5, the inner end of the stylus 13 being embedded in a piece of resilient material 15 in the circular polepiece " 3. Unwanted longitudinal vibration of the stylus 13, caused by a feature of lateral] cut recording known as " pinch effect," is thereby allowed to take place independently of the coil 5. The aperture 16 in the apex 6b of the conical former 6 is made V-section to prevent lost motion, in a lateral direction, between the stylus 13 and the aperture 16, while the advantage of independent longitudinal motion is still retained. It is found that the cut-off point for the higher frequencies varies according to the amount of compression of the resilient material 15 about the end of the stylus 13, in the polepiece 3. Means are therefore provided to adjust the compression by a collet 19 which holds the resilient material 15, and is thereby expanded and contracted by manual operation of the knurled nut 22. Specification 586,979 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US528905A US2386089A (en) | 1944-03-31 | 1944-03-31 | Phonograph pickup device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB589272A true GB589272A (en) | 1947-06-16 |
Family
ID=24107691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7145/45A Expired GB589272A (en) | 1944-03-31 | 1945-03-21 | Phonograph pick-up-device |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2386089A (en) |
| GB (1) | GB589272A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2485137A (en) * | 1944-10-30 | 1949-10-18 | Brush Dev Co | Connection means for phonograph pickups |
| NL75135C (en) * | 1947-01-11 |
-
1944
- 1944-03-31 US US528905A patent/US2386089A/en not_active Expired - Lifetime
-
1945
- 1945-03-21 GB GB7145/45A patent/GB589272A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2386089A (en) | 1945-10-02 |
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