GB307767A - Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the like - Google Patents
Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the likeInfo
- Publication number
- GB307767A GB307767A GB3335927A GB3335927A GB307767A GB 307767 A GB307767 A GB 307767A GB 3335927 A GB3335927 A GB 3335927A GB 3335927 A GB3335927 A GB 3335927A GB 307767 A GB307767 A GB 307767A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reed
- pick
- armature
- ups
- magnet
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
307,767. Wilson, P. Dec. 9, 1927. Gramophone pick-ups; magnetic instruments. -In order to damp the fundamental and even harmonics, the reed or vibrating armature of a pick-up or loud speaker is mounted about an axis which passes through the loop of the fundamental mode of vibration of the complete vibrating system, which in the case of a pick-up comprises the armature, needle socket, and needle- To ensure damping, the free end of the reed &c. compresses small air cushions in soft rubber tubes inserted in the magnet pole-pieces. In the pick-up shown in Figs. 1 and 4, the permanent magnet f has rectangular pole-pieces e fixed to the tips of the magnet and extended to form a narrow gap about the upper end of the reed a, which is surrounded by a coil l. The pivots of the reed a may consist a pair of knife-edges, of pins d surrounded by rubber tube, or of a pair of steel balls recessed into the reed and supporting brass plates. In the case of a loud speaker, the armature may be damped at both ends
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3335927A GB307767A (en) | 1927-12-09 | 1927-12-09 | Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3335927A GB307767A (en) | 1927-12-09 | 1927-12-09 | Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB307767A true GB307767A (en) | 1929-03-11 |
Family
ID=10351892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3335927A Expired GB307767A (en) | 1927-12-09 | 1927-12-09 | Improvements relating to the mounting of vibrating reeds, more particularly for use in connection with electromagnetic gramophone pick-ups, loud speakers and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB307767A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2537718A (en) * | 1945-10-01 | 1951-01-09 | Trorey Lyle Graeme | Photogrammetric apparatus |
-
1927
- 1927-12-09 GB GB3335927A patent/GB307767A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2537718A (en) * | 1945-10-01 | 1951-01-09 | Trorey Lyle Graeme | Photogrammetric apparatus |
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