GB447869A - Improvements in or relating to phonograph reproducers - Google Patents

Improvements in or relating to phonograph reproducers

Info

Publication number
GB447869A
GB447869A GB2751935A GB2751935A GB447869A GB 447869 A GB447869 A GB 447869A GB 2751935 A GB2751935 A GB 2751935A GB 2751935 A GB2751935 A GB 2751935A GB 447869 A GB447869 A GB 447869A
Authority
GB
United Kingdom
Prior art keywords
coil
stylus
polepieces
gap
springs
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
GB2751935A
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
Priority to US749155A priority Critical patent/US2034872A/en
Application filed by Electrical Research Products Inc filed Critical Electrical Research Products Inc
Publication of GB447869A publication Critical patent/GB447869A/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
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/16Mounting or connecting stylus to transducer with or without damping means
    • 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

447,869. Phonographic reproducers. ELECTRICAL RESEARCH PRODUCTS, Inc., 195, Broadway, New York, U.S.A. Oct. 5, 1935, No. 27519. Convention date, Oct. 20, 1934. [Class 40 (iv)] A phonographic reproducer for both hill-anddale and lateral-cut records comprises a magnetic circuit including a gap or gaps, a generating coil and a stylus connected thereto and the coil and stylus carrier are supported by springs in such a manner that the coil is constrained to move in said gap or gaps in one generating mode for vertical vibrations of the stylus and in another mode for lateral vibrations of the stylus. The reproducer shown in Figs. 1, 2 comprises a permanent magnet 10 having polepieces 11, 12 shaped to provide a triangular gap 13 for the coil 14 which is of the " pancake " type constituted by a flat spiral suitably impregnated to maintain its shape. The coil carries a stylus 25 and is mounted on a spacer 23 secured to the bottom piece 18 by an upper spring 19 capable of vertical and horizontal movements and a flat spring 20 with high lateral stiffness but capable of vertical and torsional movement. The polepieces 11, 12 are held in spaced relationship by a brass or other non-magnetic spacing piece 21. In a faces on opposite sides of the coil 34 which is disposed in the gap so that the flux traverses the two halves of the coil in opposite directions. The coil 34 carries a stylus 35 and is mounted by springs 37, 38 similar to the springs 19, 20 shown in Fig. 1, on a spacing washer 40 secured to the polepiece 33. The polepieces may be slotted opposite the core 15 of the coil and the modified construction, Figs. 4, 6, the polepieces 32, 33 are shaped so that each has two active pole faces may be shaped to the contour of the coil so that the path of lowest reluctance is through the coil.
GB2751935A 1934-10-20 1935-10-05 Improvements in or relating to phonograph reproducers Expired GB447869A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US749155A US2034872A (en) 1934-10-20 1934-10-20 Phonograph reproducer

Publications (1)

Publication Number Publication Date
GB447869A true GB447869A (en) 1936-05-27

Family

ID=25012505

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2751935A Expired GB447869A (en) 1934-10-20 1935-10-05 Improvements in or relating to phonograph reproducers

Country Status (2)

Country Link
US (1) US2034872A (en)
GB (1) GB447869A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE753499C (en) * 1940-01-25 1951-08-06 Rudolf Steinborn Electrodynamic pickup
US2516919A (en) * 1946-06-05 1950-08-01 Atf Inc Electrodynamic phonograph pickup
US2478712A (en) * 1947-04-03 1949-08-09 Crosley Broadcasting Corp Electrodynamic phonograph pickup
DE970382C (en) * 1951-10-30 1958-09-11 Atlas Werke Ag Writing device for timer
DE1134527B (en) * 1960-01-30 1962-08-09 Georg Neumann Electromechanical converter with negative feedback for recording and reproducing sound vibrations in single-component writing
DE1112841B (en) * 1960-04-08 1961-08-17 Telefunken Gmbh Electro-mechanical converter
GB2002619B (en) * 1977-07-13 1982-03-17 Victor Company Of Japan Moving-coil type stereo pickup cartridge
JPS5448503A (en) * 1977-09-01 1979-04-17 Matsushita Electric Ind Co Ltd Moving coil type pickup cartridge
US4251695A (en) * 1977-10-24 1981-02-17 Victor Company Of Japan Ltd. Pickup cartridge having means for producing magnetic fields of opposite directions for coil plate
US4209670A (en) * 1977-10-24 1980-06-24 Victor Company Of Japan, Limited Moving-coil type pickup cartridge
JPS5819200B2 (en) * 1977-12-23 1983-04-16 Pioneer Electronic Corp
JPS5492702A (en) * 1977-12-29 1979-07-23 Ortofon Mfg As Movable coil pickup
US4281225A (en) * 1978-01-17 1981-07-28 Nippon Gakki Seizo Kabushiki Kaisha Pickup cartridge for reproducing signals recorded on a 45-45 stereophonic record disk

Also Published As

Publication number Publication date
US2034872A (en) 1936-03-24

Similar Documents

Publication Publication Date Title
US3299219A (en) Stereophonic transducer cartridge
GB447869A (en) Improvements in or relating to phonograph reproducers
US2454425A (en) Magnetic translating device
GB1092734A (en) Phonograph pick-up
GB513895A (en) Improvements in telephone instruments
US3146319A (en) Magnetic phonograph pickup with compensating pole piece arrangement
GB448975A (en) Improvements in or relating to phonograph reproducers
US2027169A (en) Vibration translating device
US2133815A (en) Phonograph reproducer
US2410607A (en) Electric recorder-reproducer unit
US3230318A (en) Transducer
US2347347A (en) Vibration translating device
GB445935A (en) An improved sound reproducing device
US4031335A (en) Stereo pick-up with casing serving as common pole piece
US2516919A (en) Electrodynamic phonograph pickup
US1799799A (en) Sound reproducer
US2829210A (en) Magnetic pickup
US2383994A (en) Phonograph pickup
US2640888A (en) Phonograph pickup
GB1016298A (en) Stereophonic pick-up cartridge
US3031536A (en) Multiple coil electromagnetic sound reproducer
GB469093A (en) Improvements in or relating to magnetic systems, particularly for electro-acoustic apparatus
US1516595A (en) Electrical reproducer for phonographs
GB950587A (en) Improvements in or relating to gramophone pick-ups
US2534368A (en) Electric phonograph with separate stylus for recording and reproducing