GB490826A - Improvements in and relating to electrical pick-ups - Google Patents
Improvements in and relating to electrical pick-upsInfo
- Publication number
- GB490826A GB490826A GB501438A GB501438A GB490826A GB 490826 A GB490826 A GB 490826A GB 501438 A GB501438 A GB 501438A GB 501438 A GB501438 A GB 501438A GB 490826 A GB490826 A GB 490826A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pick
- sleeve
- record
- needle
- board
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Abstract
490,826. Pick-up mountings and tool arms. SOUKUP, J., ZERNER, F., HOLMES, A., and WARMAN, W. H. Feb. 18, 1937, No. 5014/38. Divided application. [Class 40 (ii)] [Also in Group XXXIX] In an electric pick-up the vibrations of the needle produced by a sound record are transmitted to the oscillating part of a device for transforming mechanical vibrations into electrical variations by a resonant body comprising a substantially flat plate-like member of an elastic material, such as wood. The needle 8 is secured to the flat board 1 divided by a slot 9 into two parts and the connecting portion of wood is reinforced by a metal pin 10. A supporting pad 11 of a resilient material, such as rubber, bridges the slot 9 and may extend beyond the edge of the smaller portion of the board. A recessed metal member 3 secured to the plate carries a carbon electrode 2 disposed opposite a second electrode 6 mounted in a member 4 carried by a shaft on which the board 1 is pivotally mounted. The chamber for the granules 7 is formed by the electrodes 2, 6 and by the felt ring 5 seated in recesses in the members 3, 4. The position of the pick-up relative to the record is controlled by a threearmed lever having an arm 17 associated with a cam 22 and arranged so that normally the cranked end 24, 25 of the second arm 18 supports the pick-up with the needle clear of the record. When the cam 22 is rotated, the cranked end of the arm 18 allows the board 1 to drop so that the needle engages the record, and further rotation of the cam causes a spring 28 carried by the end of the arm 19 to engage the top surface of the board and to apply the needle to the record with adequate pressure. The pick-up unit is rotatable and slidable on a sleeve 12 and is resiliently held against a flange 13 on the sleeve by a spring 14 which, at its opposite end, abuts a collar 15. The threearmed lever is secured to a collar 16 rotatable on the sleeve 12 and connected by a spring 21 to a collar fixed to the sleeve. Axial movement of the sleeve 12 to a desired position on the shaft 29 is permitted by means of a pin 30 and slot 31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB501438A GB490826A (en) | 1937-02-18 | 1937-02-18 | Improvements in and relating to electrical pick-ups |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB501438A GB490826A (en) | 1937-02-18 | 1937-02-18 | Improvements in and relating to electrical pick-ups |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB490826A true GB490826A (en) | 1938-08-18 |
Family
ID=9788111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB501438A Expired GB490826A (en) | 1937-02-18 | 1937-02-18 | Improvements in and relating to electrical pick-ups |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB490826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2621260A (en) * | 1947-01-24 | 1952-12-09 | Sykes Adrian Francis | Electrical sound recording, reproducing, and like apparatus |
-
1937
- 1937-02-18 GB GB501438A patent/GB490826A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2621260A (en) * | 1947-01-24 | 1952-12-09 | Sykes Adrian Francis | Electrical sound recording, reproducing, and like apparatus |
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