GB371975A - Improvements in and relating to electromagnetic pick-ups for gramophones and the like - Google Patents
Improvements in and relating to electromagnetic pick-ups for gramophones and the likeInfo
- Publication number
- GB371975A GB371975A GB397231A GB397231A GB371975A GB 371975 A GB371975 A GB 371975A GB 397231 A GB397231 A GB 397231A GB 397231 A GB397231 A GB 397231A GB 371975 A GB371975 A GB 371975A
- Authority
- GB
- United Kingdom
- Prior art keywords
- needle
- rubber
- polepieces
- armature
- soft iron
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 5
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910001369 Brass Inorganic materials 0.000 abstract 1
- 239000010951 brass Substances 0.000 abstract 1
- 238000013016 damping Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
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)
- Elimination Of Static Electricity (AREA)
Abstract
371,975. Gramophone pick-ups. ROSEN, E. E., 238, Cricklewood Lane, and SARCHE, J., 10, Mocatta House, Brady Street, both in London. Feb. 7, 1931, No. 3972. [Class 40 (iv).] A gramophone pick-up comprises a permanent magnet a provided with L-shaped polepieces b each of which carries a soft iron core c surrounded by a winding f, the needle e, forming the armature, being pivoted at e<1> between the polepieces b whilst its inner end e<2> lies between the cores c. The polepieces b are secured together by a brass strip g and the armature pivot e<1> of soft iron is surrounded by a rubber tube e<4>. A thin rubber washer h may be slipped over the upper end of the armature as shown or this end may engage in a fibre cup supported by a rubber block, Fig. 3 (not shown) damping being effected by rubber washers stuck on to the faces of the cheeks of the bobbins f. According to a modification, Fig. 4, the needle may be received by a Y-shaped soft iron socket l provided with a screw m for fixing the needle in position and a closure n for preventing the needle from being inserted too. far. This socket is mounted through the intermediary of a rubber sleeve and rubber washers in the gaps between the poles band cores c.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB397231A GB371975A (en) | 1931-02-07 | 1931-02-07 | Improvements in and relating to electromagnetic pick-ups for gramophones and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB397231A GB371975A (en) | 1931-02-07 | 1931-02-07 | Improvements in and relating to electromagnetic pick-ups for gramophones and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB371975A true GB371975A (en) | 1932-05-05 |
Family
ID=9768364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB397231A Expired GB371975A (en) | 1931-02-07 | 1931-02-07 | Improvements in and relating to electromagnetic pick-ups for gramophones and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB371975A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547361A (en) * | 1947-05-19 | 1951-04-03 | Donald J Baker | Pickup head using torsional mount for armatures |
-
1931
- 1931-02-07 GB GB397231A patent/GB371975A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2547361A (en) * | 1947-05-19 | 1951-04-03 | Donald J Baker | Pickup head using torsional mount for armatures |
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