GB448974A - Improvements in or relating to sound reproducing systems - Google Patents

Improvements in or relating to sound reproducing systems

Info

Publication number
GB448974A
GB448974A GB24039/35A GB2403935A GB448974A GB 448974 A GB448974 A GB 448974A GB 24039/35 A GB24039/35 A GB 24039/35A GB 2403935 A GB2403935 A GB 2403935A GB 448974 A GB448974 A GB 448974A
Authority
GB
United Kingdom
Prior art keywords
relating
sound reproducing
transformers
traces
reproducing systems
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
GB24039/35A
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 GB448974A publication Critical patent/GB448974A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/12—Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R9/16—Gramophone pick-ups using a stylus; Recorders using a stylus signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Stereophonic System (AREA)
  • Magnetic Heads (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)

Abstract

448,974. Reproducing music. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A. Aug. 28, 1935, No. 24039. Convention date, Sept. 22, 1934. Addition to 448,973. [Class 40 (iv)] In the system, described in the parent Specification, of reproducing from a record having two traces in the same groove by means of a pick-up, such as described in Specification 448,975, with two coils 16, 17 each responding to both traces, the four transformers for separating the two reproductions are replaced by two transformers 40, 41 each having two secondaries of which 43 and 45 are connected in aiding relationship and 42, 44 in opposing relationship so that the hill and dale trace is reproduced at 47 and the lateral trace at 49.
GB24039/35A 1934-09-05 1935-08-28 Improvements in or relating to sound reproducing systems Expired GB448974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US742761A US2105916A (en) 1934-09-05 1934-09-05 Sound reproducing system

Publications (1)

Publication Number Publication Date
GB448974A true GB448974A (en) 1936-06-18

Family

ID=24986098

Family Applications (3)

Application Number Title Priority Date Filing Date
GB24039/35A Expired GB448974A (en) 1934-09-05 1935-08-28 Improvements in or relating to sound reproducing systems
GB24038/35A Expired GB448973A (en) 1934-09-05 1935-08-28 Improvements in or relating to sound reproducing systems
GB24118/35A Expired GB448975A (en) 1934-09-05 1935-08-29 Improvements in or relating to phonograph reproducers

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB24038/35A Expired GB448973A (en) 1934-09-05 1935-08-28 Improvements in or relating to sound reproducing systems
GB24118/35A Expired GB448975A (en) 1934-09-05 1935-08-29 Improvements in or relating to phonograph reproducers

Country Status (4)

Country Link
US (1) US2105916A (en)
DE (1) DE675787C (en)
FR (1) FR794451A (en)
GB (3) GB448974A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031536B (en) * 1956-03-16 1958-06-04 Teldec Telefunken Decca Mechanical-electrical converter for the generation or scanning of a grooved sound track
DE1102429B (en) * 1959-01-10 1961-03-16 Karl Braun Method, circuit arrangement and pickup head for switching off or reducing crosstalk interference

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700068A (en) * 1948-11-16 1955-01-18 Muller Egon Nicolas Pulse multiplex system
DE1065188B (en) * 1955-09-23
US3053943A (en) * 1957-07-12 1962-09-11 Columbia Broadcasting Syst Inc Phonograph record cutter
DE1073762B (en) * 1957-07-15 1960-01-21 Deutsche Grammophon Gesellschaft mit beschränkter Haftung, Hamburg Pickup based on the piezoelectric principle for simultaneous scanning of side and subscript writing
BE571819A (en) * 1957-10-08
NL107684C (en) * 1957-12-10
DE1135675B (en) * 1958-01-18 1962-08-30 Neumann Georg Electrodynamic pickup or cutting box for scanning or cutting a groove-shaped sound track
DE1138560B (en) * 1958-03-05 1962-10-25 Fonofilm Ind As Cutting box for recording two signals in a groove of a sound carrier
US3013125A (en) * 1958-05-16 1961-12-12 Columbia Broadcasting Syst Inc Stereophonic recording
NL105975C (en) * 1958-05-27
US3049040A (en) * 1959-01-26 1962-08-14 Donald J Leslie Apparatus for minimizing beat effects
GB950587A (en) * 1959-06-13 1964-02-26 Emi Ltd Improvements in or relating to gramophone pick-ups
US4160268A (en) * 1977-03-31 1979-07-03 Victor Company Of Japan, Ltd. Signal pickup device with tracking control and jitter compensation for a video disc

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1031536B (en) * 1956-03-16 1958-06-04 Teldec Telefunken Decca Mechanical-electrical converter for the generation or scanning of a grooved sound track
DE1102429B (en) * 1959-01-10 1961-03-16 Karl Braun Method, circuit arrangement and pickup head for switching off or reducing crosstalk interference

Also Published As

Publication number Publication date
DE675787C (en) 1939-05-17
FR794451A (en) 1936-02-18
GB448975A (en) 1936-06-18
GB448973A (en) 1936-06-18
US2105916A (en) 1938-01-18

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