GB308892A - Improvements in electro-magnetic vibratory devices for use, for example, in reproducing or recording sound - Google Patents

Improvements in electro-magnetic vibratory devices for use, for example, in reproducing or recording sound

Info

Publication number
GB308892A
GB308892A GB8644/28A GB864428A GB308892A GB 308892 A GB308892 A GB 308892A GB 8644/28 A GB8644/28 A GB 8644/28A GB 864428 A GB864428 A GB 864428A GB 308892 A GB308892 A GB 308892A
Authority
GB
United Kingdom
Prior art keywords
armature
reproducing
electro
recording sound
vibratory devices
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
GB8644/28A
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.)
Parlophone Records Ltd
Original Assignee
Gramophone Co Ltd
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 Gramophone Co Ltd filed Critical Gramophone Co Ltd
Priority to GB8644/28A priority Critical patent/GB308892A/en
Priority to US340569A priority patent/US1850848A/en
Publication of GB308892A publication Critical patent/GB308892A/en
Expired legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Jigging Conveyors (AREA)

Abstract

308,892. Gramophone Co., Ltd., and Payne, E. M. March 21, 1928. Gramophone pick-ups; magnetic instruments.-The vibrating armature of a gramophone pick-up or other electromagnetic vibratory device is made other than flat to increase the stiffness mass ratio and damping area, the pole pieces being shaped to correspond. The armature blade 8, Fig. 2, is of corrugated form and attached to a boss 5 pivoted about an axis 7, the pole pieces 3, 4. Fig. 3, being shaped to correspond with the armature blade. Damping pads of rubber, not shown, bear upon extensions of the armature. Specification 304,858 is referred to.
GB8644/28A 1928-03-21 1928-03-21 Improvements in electro-magnetic vibratory devices for use, for example, in reproducing or recording sound Expired GB308892A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8644/28A GB308892A (en) 1928-03-21 1928-03-21 Improvements in electro-magnetic vibratory devices for use, for example, in reproducing or recording sound
US340569A US1850848A (en) 1928-03-21 1929-02-16 Electromagnetic vibratory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8644/28A GB308892A (en) 1928-03-21 1928-03-21 Improvements in electro-magnetic vibratory devices for use, for example, in reproducing or recording sound

Publications (1)

Publication Number Publication Date
GB308892A true GB308892A (en) 1929-04-04

Family

ID=9856447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8644/28A Expired GB308892A (en) 1928-03-21 1928-03-21 Improvements in electro-magnetic vibratory devices for use, for example, in reproducing or recording sound

Country Status (2)

Country Link
US (1) US1850848A (en)
GB (1) GB308892A (en)

Also Published As

Publication number Publication date
US1850848A (en) 1932-03-22

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