GB448973A - Improvements in or relating to sound reproducing systems - Google Patents

Improvements in or relating to sound reproducing systems

Info

Publication number
GB448973A
GB448973A GB24038/35A GB2403835A GB448973A GB 448973 A GB448973 A GB 448973A GB 24038/35 A GB24038/35 A GB 24038/35A GB 2403835 A GB2403835 A GB 2403835A GB 448973 A GB448973 A GB 448973A
Authority
GB
United Kingdom
Prior art keywords
transformers
pick
cut
coils
opposing
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
GB24038/35A
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 GB448973A publication Critical patent/GB448973A/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
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/12Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R9/16Gramophone pick-ups using a stylus; Recorders using a stylus signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously
    • 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

448,973. Reproducing music. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A. Aug. 28, 1935, No. 24038. Convention date, Sept. 5, 1934. [Class 40 (iv)] In a system for reproducing fron a record having two traces, e.g hill and dale anc lateral, cut in the same groove anc using a pick - up such as describec in Specificatior 448,975 having spaced coils each responding to the two traces, arrangements are provided for separating the combined reproductions. The system may be applied to binaural reproduction, or to the reproduction of two un-related recordings or a solo and its accompaniment. As shown, each coil 16, 17 is connected to a pair of parallel valves 27, 28 or 29, 30 which have separate output transformers 31 ... 34, the secondaries of 31, 33 being in aiding and of 32, 34 in opposing relationship. For the hill and dale cut, the stylus moves vertically and the currents in the pick-up coils are in phase so that loud-speaker 36 connected to the aiding transformers 31, 33 reproduces, whereas loudspeaker 38 connected to the opposing transformers 32, 34 does not. For the lateral cut, the pick-up oscillates about a horizontal axis and the currents in the coils are in opposite phase so that loud-speaker 38 connected to the opposing transformers reproduces and 36 does not.
GB24038/35A 1934-09-05 1935-08-28 Improvements in or relating to sound reproducing systems Expired GB448973A (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
GB448973A true GB448973A (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 Before (1)

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

Family Applications After (1)

Application Number Title Priority Date Filing Date
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
DE1135675B (en) * 1958-01-18 1962-08-30 Neumann Georg Electrodynamic pickup or cutting box for scanning or cutting a groove-shaped sound track

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
NL231921A (en) * 1957-10-08
NL107684C (en) * 1957-12-10
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
DE1102429B (en) * 1959-01-10 1961-03-16 Karl Braun Method, circuit arrangement and pickup head for switching off or reducing crosstalk interference
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
DE1135675B (en) * 1958-01-18 1962-08-30 Neumann Georg Electrodynamic pickup or cutting box for scanning or cutting a groove-shaped sound track

Also Published As

Publication number Publication date
GB448975A (en) 1936-06-18
FR794451A (en) 1936-02-18
DE675787C (en) 1939-05-17
US2105916A (en) 1938-01-18
GB448974A (en) 1936-06-18

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