GB376705A - Improvements in or relating to devices for converting electrical into acoustic oscillations or vice versa - Google Patents
Improvements in or relating to devices for converting electrical into acoustic oscillations or vice versaInfo
- Publication number
- GB376705A GB376705A GB480/31A GB48031A GB376705A GB 376705 A GB376705 A GB 376705A GB 480/31 A GB480/31 A GB 480/31A GB 48031 A GB48031 A GB 48031A GB 376705 A GB376705 A GB 376705A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shoes
- pole
- casing
- leather
- armature
- 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)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
376,705. Gramophone pick - ups. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, , Eindhoven, Holland. Jan. 6, 1931, No. 480. Convention date, Feb. 15, 1930. Void [Published under Sect. 91 of the Acts]. [Class 40 (iv).] A gramophone pick-up comprises a casing 1 in which are arranged magnets 2, 3 provided with pole-shoes 4 .. 7. An armature 8 surrounded by a coil 12 is arranged between the pole-shoes, the lower end of the armature carrying a needle-holder 9 whilst its upper end is resiliently supported by helical springs 14, 15 arranged in recesses in the pole-shoes 4, 7. The armature spindle 17 is arranged with some play between the pole-shoes 5, 6, copper tubes 18 internally provided with a leather covering 19 being slid on the ends of the spindle and partly surrounded by leather 20 provided on the pole-shoes 5, 6. The casing is filled with a mixture 21 of the material known under the Registered Trade Mark " Vaseline," and paraffin oil, the opening in the casing where the needleholder passes through it being closed on the inside by a member 22, which may be a piece of intestinal wall. The opening is also preferably closed on the outside by a piece of leather 23.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL376705X | 1930-02-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376705A true GB376705A (en) | 1932-07-14 |
Family
ID=19785600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB480/31A Expired GB376705A (en) | 1930-02-15 | 1931-01-06 | Improvements in or relating to devices for converting electrical into acoustic oscillations or vice versa |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR708294A (en) |
| GB (1) | GB376705A (en) |
-
1930
- 1930-12-23 FR FR708294D patent/FR708294A/en not_active Expired
-
1931
- 1931-01-06 GB GB480/31A patent/GB376705A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR708294A (en) | 1931-07-22 |
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