GB338541A - Improvements in or relating to apparatus for reproducing sound electrically from sound records - Google Patents

Improvements in or relating to apparatus for reproducing sound electrically from sound records

Info

Publication number
GB338541A
GB338541A GB1568629A GB1568629A GB338541A GB 338541 A GB338541 A GB 338541A GB 1568629 A GB1568629 A GB 1568629A GB 1568629 A GB1568629 A GB 1568629A GB 338541 A GB338541 A GB 338541A
Authority
GB
United Kingdom
Prior art keywords
sound
diaphragm
pick
magnetic
relating
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
GB1568629A
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 to GB1568629A priority Critical patent/GB338541A/en
Publication of GB338541A publication Critical patent/GB338541A/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

338,541. Bailey, W. C., and Keefe, J. May 21, 1929. Gramophone pick-ups; magnetic instruments.- A sound record pick-up comprises, (i) a metallic diaphragm b attached to a pivoted stylus arm c, a Leaf c<2> carried by the arm acting as an armature influenced by the poles d<2> of a permanent magnet d, the coils e being connected to a thermionic amplifier; (ii) an additional permanent magnet f, the pole pieces f<1> of which have coils g connected to a second amplifier, the diaphragm b acting as an armature to the second magnet f. The stylus arm is pivoted to the non-magnetic casing a at a<1>, the magnetic diaphragm b being insulated therefrom by a rubber gasket b<1>. Provision may be made for adjusting the polepieces f<1>, d<2>. The device may be employed either as an ordinary gramophone sound box or electrical pick-up.
GB1568629A 1929-05-21 1929-05-21 Improvements in or relating to apparatus for reproducing sound electrically from sound records Expired GB338541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1568629A GB338541A (en) 1929-05-21 1929-05-21 Improvements in or relating to apparatus for reproducing sound electrically from sound records

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1568629A GB338541A (en) 1929-05-21 1929-05-21 Improvements in or relating to apparatus for reproducing sound electrically from sound records

Publications (1)

Publication Number Publication Date
GB338541A true GB338541A (en) 1930-11-21

Family

ID=10063595

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1568629A Expired GB338541A (en) 1929-05-21 1929-05-21 Improvements in or relating to apparatus for reproducing sound electrically from sound records

Country Status (1)

Country Link
GB (1) GB338541A (en)

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