GB324636A - Improvements in or relating to electro-magnetic pick-ups for use with gramophones and the like - Google Patents
Improvements in or relating to electro-magnetic pick-ups for use with gramophones and the likeInfo
- Publication number
- GB324636A GB324636A GB3109228A GB3109228A GB324636A GB 324636 A GB324636 A GB 324636A GB 3109228 A GB3109228 A GB 3109228A GB 3109228 A GB3109228 A GB 3109228A GB 324636 A GB324636 A GB 324636A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- bearing
- rectangular
- bar
- section
- 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)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
324,636. Moulton, C. Berrage-. Oct. 26, 1928. No Patent granted (Sealing fee not paid). Gramophone pick-ups; magnetic instruments. - The armature or stylus bar of a pick-up has a part of square or rectangular cross-section exter.ding through a bearing of similar section, the space between armature and bearing being packed with a rubber tube. The field windings 6, Fig. 1, of the U- shaped magnet 1 are mounted on the polepieces 2, 3, the air gap being adjustable by providing elongated holes for the securing screws 4, 5; the pole-pieces may be fitted with left- and right-hand threaded lugs and a correspondingly threaded adjusting screw, enabling both poles to be adjusted simultaneously. The rectangular bearing is formed by two L-shaped plates 7, 8, Fig. 2, the upper ends being secured to the magnet and the lower to the insulating plate 9, thus forming a rectangular channel. The armature is secured in the bearing by the transverse bar 17, the screws 18 serving to adjust the pressure on the rubber sleeve &c. The armature is a bar or tube of soft iron, having a flattened upper part 13 and a part 15 of square or rectangular section fitted with a rubber tube 16. Reference has been directed by the Comptroller to Specifications 260,148, 268,759, 278,967, 292,893, and 298,209.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3109228A GB324636A (en) | 1928-10-26 | 1928-10-26 | Improvements in or relating to electro-magnetic pick-ups for use with gramophones and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3109228A GB324636A (en) | 1928-10-26 | 1928-10-26 | Improvements in or relating to electro-magnetic pick-ups for use with gramophones and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB324636A true GB324636A (en) | 1930-01-27 |
Family
ID=10317833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3109228A Expired GB324636A (en) | 1928-10-26 | 1928-10-26 | Improvements in or relating to electro-magnetic pick-ups for use with gramophones and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB324636A (en) |
-
1928
- 1928-10-26 GB GB3109228A patent/GB324636A/en not_active Expired
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