GB350954A - Improvements in electro-mechanical sound recording devices more especially of the moving coil type - Google Patents
Improvements in electro-mechanical sound recording devices more especially of the moving coil typeInfo
- Publication number
- GB350954A GB350954A GB13581/31A GB1358131A GB350954A GB 350954 A GB350954 A GB 350954A GB 13581/31 A GB13581/31 A GB 13581/31A GB 1358131 A GB1358131 A GB 1358131A GB 350954 A GB350954 A GB 350954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electro
- recording devices
- sound recording
- moving coil
- coil type
- 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
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/02—Gyroplanes
- B64C27/021—Rotor or rotor head construction
- B64C27/026—Devices for converting a fixed wing into an autorotation rotor and viceversa
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/32—Alkali metal silicates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/16—Mounting or connecting stylus to transducer with or without damping means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
- H04R3/08—Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
Abstract
350,954. Phonographic recorders. BLUMLEIN, A. D., 57, Earl's Court Square, and HOLMAN, H. E., 64A, The Chase, Clapham Common, both in London. March 10, 1930, No. 13581/31. Divided on 350,998. [Class 40 (iv).] A moving-coil sound-recorder has the cutting tool 14 connected to the driving motor by a linkage comprising, or kinematically equivalent to, a shaft 8 inclined or perpendicular to the wax surface 15 and extending down from the motor and a stylus arm 7 perpendicular to the shaft. Alternatively, a soundrecorder has the axis of rotation of the driving motor perpendicular to the wax surface. The sound-recorder described is the same as that described in Specification 350,998.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7809/30A GB350998A (en) | 1930-03-10 | 1930-03-10 | Improvements in apparatus for recording sounds upon wax or other like discs or blanks |
GB1968806X | 1930-09-12 | ||
US518524A US2024271A (en) | 1930-03-10 | 1931-02-26 | Moving coil electromechanical device |
US561755A US2016622A (en) | 1930-09-12 | 1931-09-08 | Moving coil electromechanical device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB350954A true GB350954A (en) | 1931-06-10 |
Family
ID=32512445
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13581/31A Expired GB350954A (en) | 1930-03-10 | 1930-03-10 | Improvements in electro-mechanical sound recording devices more especially of the moving coil type |
GB7809/30A Expired GB350998A (en) | 1930-03-10 | 1930-03-10 | Improvements in apparatus for recording sounds upon wax or other like discs or blanks |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7809/30A Expired GB350998A (en) | 1930-03-10 | 1930-03-10 | Improvements in apparatus for recording sounds upon wax or other like discs or blanks |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB350954A (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL61306C (en) * | 1937-10-07 | |||
DE915946C (en) * | 1949-05-31 | 1954-08-02 | Telefunken Gmbh | Dynamic moving coil microphone |
-
1930
- 1930-03-10 GB GB13581/31A patent/GB350954A/en not_active Expired
- 1930-03-10 GB GB7809/30A patent/GB350998A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB350998A (en) | 1931-06-10 |
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