GB254403A - Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like record - Google Patents
Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like recordInfo
- Publication number
- GB254403A GB254403A GB9047/25A GB904725A GB254403A GB 254403 A GB254403 A GB 254403A GB 9047/25 A GB9047/25 A GB 9047/25A GB 904725 A GB904725 A GB 904725A GB 254403 A GB254403 A GB 254403A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stylus
- limbs
- record
- agramophone
- actuated
- 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
Abstract
254,403. Round, H. J. April 4, 1925. Magnetic instruments.-An electromagnetic device for recording sound or for reproducing sound from a record comprises a magnet 1 having three limbs, the outer limbs being of the same polarity and having adjustably mounted thereon pole-pieces 4 which carry coils 6. The inner limb, of opposite polarity to the outer ones, is slotted to receive a tongue 2 forming a stylus-carrier, which forms a polepiece movable between the parts 4. Adjustable rods 7 are mounted in extensions of the outer limbs, and carry rubber damping buffers which engage the stylus or stylus-carrier.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9047/25A GB254403A (en) | 1925-04-04 | 1925-04-04 | Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like record |
FR613221D FR613221A (en) | 1925-04-04 | 1926-03-22 | Improvements to electromagnetic microphones or similar apparatus capable of being actuated by means of a phonographic imprint or of being used for the making of this imprint |
US98961A US1974895A (en) | 1925-04-04 | 1926-04-01 | Electromagnetic reproducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9047/25A GB254403A (en) | 1925-04-04 | 1925-04-04 | Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like record |
Publications (1)
Publication Number | Publication Date |
---|---|
GB254403A true GB254403A (en) | 1926-07-05 |
Family
ID=9864356
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9047/25A Expired GB254403A (en) | 1925-04-04 | 1925-04-04 | Improvements in electromagnetic microphones or the like, adapted to be actuated by agramophone or like record |
Country Status (3)
Country | Link |
---|---|
US (1) | US1974895A (en) |
FR (1) | FR613221A (en) |
GB (1) | GB254403A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496484A (en) * | 1946-04-17 | 1950-02-07 | Massa Frank | Magnetostrictive phonograph pickup |
US2588327A (en) * | 1948-01-31 | 1952-03-04 | Dictaphone Corp | Recorder head |
US3038037A (en) * | 1958-01-29 | 1962-06-05 | Mc Graw Edison Co | Recording machine |
-
1925
- 1925-04-04 GB GB9047/25A patent/GB254403A/en not_active Expired
-
1926
- 1926-03-22 FR FR613221D patent/FR613221A/en not_active Expired
- 1926-04-01 US US98961A patent/US1974895A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR613221A (en) | 1926-11-12 |
US1974895A (en) | 1934-09-25 |
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