GB368336A - Improvements in and relating to the mounting of pivoted apparatus, such as electrical sound recording devices - Google Patents
Improvements in and relating to the mounting of pivoted apparatus, such as electrical sound recording devicesInfo
- Publication number
- GB368336A GB368336A GB3620830A GB3620830A GB368336A GB 368336 A GB368336 A GB 368336A GB 3620830 A GB3620830 A GB 3620830A GB 3620830 A GB3620830 A GB 3620830A GB 368336 A GB368336 A GB 368336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- recording devices
- mounting
- relating
- sound recording
- forces
- 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
Abstract
368,336. Mounting electromagnetic recorders in machines. BLUMLEIN, A. D., 57, Earl's Court Square, and HOLMAN, H. E., 64A, The Chase, Clapham Common, both in London. Dec. 1, 1930, No. 36208. [Class 40 (ii).] Pivotally mounted apparatus, such as an electrical phonographic recorder, to which forces tending to move it about its pivot are applied at a point remote from the pivotal axis, has the pivots, e.g. knife-edges, so positioned that the effective inertia of the apparatus at the point at which the forces are applied is not more than 25 per cent greater than its minimum value. The invention is shown applied to the sound-recording devices described in Specifications 350,954 and 350,998, [both in Group XXXIX]. In order to allow for unevenness of the disc surface e, the whole device is mounted for movement about a horizontal axis by supporting it in a spectacle plate f which is clamped around aluminium tubes g enclosing the field coil bobbins of the electromagnet a which operate the recording stylus d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3620830A GB368336A (en) | 1930-12-01 | 1930-12-01 | Improvements in and relating to the mounting of pivoted apparatus, such as electrical sound recording devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3620830A GB368336A (en) | 1930-12-01 | 1930-12-01 | Improvements in and relating to the mounting of pivoted apparatus, such as electrical sound recording devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB368336A true GB368336A (en) | 1932-03-01 |
Family
ID=10385970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3620830A Expired GB368336A (en) | 1930-12-01 | 1930-12-01 | Improvements in and relating to the mounting of pivoted apparatus, such as electrical sound recording devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB368336A (en) |
-
1930
- 1930-12-01 GB GB3620830A patent/GB368336A/en not_active Expired
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