GB1367651A - Stereophonic phonograph pickups - Google Patents

Stereophonic phonograph pickups

Info

Publication number
GB1367651A
GB1367651A GB4129971A GB4129971A GB1367651A GB 1367651 A GB1367651 A GB 1367651A GB 4129971 A GB4129971 A GB 4129971A GB 4129971 A GB4129971 A GB 4129971A GB 1367651 A GB1367651 A GB 1367651A
Authority
GB
United Kingdom
Prior art keywords
polepiece
armature
members
pins
magnetic
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
GB4129971A
Original Assignee
Stanton W O
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 US9556270A priority Critical
Application filed by Stanton W O filed Critical Stanton W O
Publication of GB1367651A publication Critical patent/GB1367651A/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
    • H04R11/00Transducers of moving-armature or moving-core type
    • H04R11/08Gramophone pick-ups using a stylus; Recorders using a stylus
    • H04R11/12Gramophone pick-ups using a stylus; Recorders using a stylus signals being recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

Abstract

1367651 Stereophonic pickups W O STANTON 3 Sept 1971 [7 Dec 1970] 41299/71 Heading H4J A stereophonic pickup of the variable reluctance type comprises a circular array of three polepieces 40, 42, 68 (Fig. 3) which define a common space surrounding one end 108 (Fig. 4) of an armature 96 pivotally mounted at its other end 106. A cartridge body consists of two interfitting parts 16, 20 (Fig. 3) and two intermediate parts 18, 19 which serve as bobbins. Such parts are all formed of polystyrene and are moulded with interlocking portions, e.g. tongues and grooves 72 and 70, 76, 74. A magnetic circuit element 22 comprises a base 24, two core legs 26, 28, one for each channel, and a third leg 30 common to both channels. Polepiece members 36 and 38 abut the legs 26 and 28 respectively, within apertures 58 and 60 in the bobbins 18 and 19. The polepieces 40 and 42 are extensions of the polepiece members 36 and 38 and the polepiece 68 is an extension of the leg 30. The element 22 and polepiece members 36 and 38 are of high permeability material. Coils 46, 48 are wound on the bobbins 18, 19 and their outputs are connected to terminal pins 50a, 50b, 50c and 50d. Pins 50b and 50c are joined by a capacitor 52 to reduce cross talk. The pins 50a and 50d are earthed and connected to a shielding casing 11 of high permeability material. A single turn strap 53 of copper is provided about polepiece members 36, 38 and acts as an inductance coupling the magnetic circuits of the two channels to reduce cross talk and as an earth connection from the polepiece members 36, 38 to the casing 11. The pins 50a, 50b, 50c and 50d pass through holes in the body part 16. The moving armature 96 is a high permeability tube within a non-metallic tubular casing 98 of non- magnetic material. A stylus 100 is connected to armature 96 by a support tube 102. A rubber collar 104 on the end 106 of the armature 96 provides a pivot so hat this end of the armature 96, when the stylus vibrates, is substantially stationary relative to a permanent magnet 44 feeding the magnetic circuits and located in a groove 90 in the front of body part 20. The other end 108 of the armature 96 is vibrated by the stylus 100 in the common space between the polepieces 40, 42, 68 and thereby varies the magnetic flux through the magnetic circuits and the E.M.F. induced in the coils 46, 48.
GB4129971A 1970-12-07 1971-09-03 Stereophonic phonograph pickups Expired GB1367651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US9556270A true 1970-12-07 1970-12-07

Publications (1)

Publication Number Publication Date
GB1367651A true GB1367651A (en) 1974-09-18

Family

ID=22252580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4129971A Expired GB1367651A (en) 1970-12-07 1971-09-03 Stereophonic phonograph pickups

Country Status (11)

Country Link
US (1) US3646279A (en)
JP (1) JPS5322841B1 (en)
BE (1) BE773904A (en)
CA (1) CA929865A (en)
CH (1) CH559404A5 (en)
DE (1) DE2159573C2 (en)
DK (1) DK130670C (en)
FR (1) FR2116374B1 (en)
GB (1) GB1367651A (en)
IT (1) IT938613B (en)
NL (1) NL171317C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7404359A (en) * 1974-04-01 1975-10-03 Philips Nv GROOVE TASTER AND / OR CUTTER.
US3952171A (en) * 1974-09-18 1976-04-20 Micro/Acoustics Corporation Stereo phonograph cartridge
NL169384C (en) * 1974-10-01 1982-07-01 Philips Nv NEEDLE HOLDER.
US4072823A (en) * 1975-06-06 1978-02-07 Kabushiki Kaisha Mitachi Onkyo Seisakusho Moving magnet pickup cartridge
US4119844A (en) * 1976-07-30 1978-10-10 Marvin Glass & Associates Phonograph cartridge and sensor assembly
DE2825791C2 (en) * 1978-06-13 1980-07-31 Dual Gebrueder Steidinger, 7742 St Georgen Pickup with exchangeable stylus
US4320492A (en) * 1980-04-01 1982-03-16 Micro-Acoustics Corporation Variable weight phonograph cartridge
JPS646632Y2 (en) * 1981-03-18 1989-02-21
DE3228300C2 (en) * 1982-07-29 1984-12-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Pickup for reading information from the groove of a rotating information carrier disc
DE3533814C1 (en) * 1985-09-21 1986-11-06 Philips Patentverwaltung Gmbh, 2000 Hamburg Method for producing a magnetic sound pick up system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB847138A (en) * 1957-11-05 1960-09-07 Decca Record Co Ltd Improvements in or relating to pick-ups for sound recordings having a groove for mechanically oscillating a stylus
US2864897A (en) * 1958-02-17 1958-12-16 Hoffman Electronics Corp Universal phonograph pickup head or the like
US3297831A (en) * 1964-02-06 1967-01-10 Walter O Stanton Magnetic stereophonic phonograph pickup
NL168390C (en) * 1968-04-30 1982-03-16 Pickering & Co Inc STEREOPHONIC GRAMOPHONE RECORDER.
US3546399A (en) * 1969-01-29 1970-12-08 Pickering & Co Inc Induced magnetic moving iron stereophonic phonograph pickup with replaceable stylus assembly

Also Published As

Publication number Publication date
FR2116374A1 (en) 1972-07-13
NL171317B (en) 1982-10-01
FR2116374B1 (en) 1977-01-14
DE2159573A1 (en) 1972-06-15
CA929865A (en) 1973-07-10
DE2159573C2 (en) 1982-04-29
JPS5322841B1 (en) 1978-07-11
NL171317C (en) 1983-03-01
US3646279A (en) 1972-02-29
BE773904A (en) 1972-04-13
NL7113232A (en) 1972-06-09
DK130670C (en) 1975-09-15
CH559404A5 (en) 1975-02-28
IT938613B (en) 1973-02-10
DK130670B (en) 1975-03-17

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee