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 type

Info

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
Application number
GB13581/31A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority claimed from US518524A external-priority patent/US2024271A/en
Publication of GB350954A publication Critical patent/GB350954A/en
Priority claimed from US561755A external-priority patent/US2016622A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/002Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64CAEROPLANES; HELICOPTERS
    • B64C27/00Rotorcraft; Rotors peculiar thereto
    • B64C27/02Gyroplanes
    • B64C27/021Rotor or rotor head construction
    • B64C27/026Devices for converting a fixed wing into an autorotation rotor and viceversa
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00Silicon; Compounds thereof
    • C01B33/20Silicates
    • C01B33/32Alkali metal silicates
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/16Mounting or connecting stylus to transducer with or without damping means
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/04Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • H04R3/08Circuits for transducers, loudspeakers or microphones for correcting frequency response of electromagnetic transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/12Gramophone 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.
GB13581/31A 1930-03-10 1930-03-10 Improvements in electro-mechanical sound recording devices more especially of the moving coil type Expired GB350954A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
GB350998A (en) 1931-06-10

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