GB290559A - Electromagnetic device for reproducing sound waves - Google Patents

Electromagnetic device for reproducing sound waves

Info

Publication number
GB290559A
GB290559A GB497/28A GB49728A GB290559A GB 290559 A GB290559 A GB 290559A GB 497/28 A GB497/28 A GB 497/28A GB 49728 A GB49728 A GB 49728A GB 290559 A GB290559 A GB 290559A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
sound waves
electromagnetic device
reproducing sound
carrier
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
GB497/28A
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB290559A publication Critical patent/GB290559A/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
    • H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus

Abstract

290,559. Electrical Research Products, Inc., (Assignees of Jones, W. C.). May 14, 1927, [Convention date]. Magnetic instruments; diaphragms; phonographic recorders and reproducers.- An electromagnetic sound reproducer comprises a diaphragm associated with an actuating winding and a stylus carrier rigidly secured to, and solely supported by, the diaphragm for oscillation about an axis within the diaphragm. The carrier 20 which constitutes an armature has a portion 15 with lateral extensions 16, 17 affixed to the diaphragm so as to stiffen it in one direction whilst permitting substantially free flexure in a direction at right angles. The diaphragm forms a closure for a container housing the electromagnet and substantially filled with viscous material. Specifications 290,264 and 290,290 are referred to.
GB497/28A 1927-05-14 1928-01-06 Electromagnetic device for reproducing sound waves Expired GB290559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US191515A US1746730A (en) 1927-05-14 1927-05-14 Reproducing apparatus

Publications (1)

Publication Number Publication Date
GB290559A true GB290559A (en) 1929-04-08

Family

ID=22705795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB497/28A Expired GB290559A (en) 1927-05-14 1928-01-06 Electromagnetic device for reproducing sound waves

Country Status (2)

Country Link
US (1) US1746730A (en)
GB (1) GB290559A (en)

Also Published As

Publication number Publication date
US1746730A (en) 1930-02-11

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