GB714621A - Improvements in or relating to magnetic transducing assembly - Google Patents

Improvements in or relating to magnetic transducing assembly

Info

Publication number
GB714621A
GB714621A GB273052A GB273052A GB714621A GB 714621 A GB714621 A GB 714621A GB 273052 A GB273052 A GB 273052A GB 273052 A GB273052 A GB 273052A GB 714621 A GB714621 A GB 714621A
Authority
GB
United Kingdom
Prior art keywords
turntable
record
leadscrew
transducer
carriage
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
GB273052A
Inventor
Marvin Camras
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.)
Armour Research Foundation
Original Assignee
Armour Research Foundation
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 BE509275D priority Critical patent/BE509275A/xx
Priority to US256431A priority patent/US2840642A/en
Application filed by Armour Research Foundation filed Critical Armour Research Foundation
Priority to GB273052A priority patent/GB714621A/en
Priority to FR1056283D priority patent/FR1056283A/en
Priority to CH318227D priority patent/CH318227A/en
Publication of GB714621A publication Critical patent/GB714621A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/16—Manual control
    • G11B19/165—Manual control by closing the cover
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks

Abstract

714,621. Magnetic recording and reproducing apparatus. ARMOUR RESEARCH FOUNDATION OF ILLINOIS INSTITUTE OF TECHNOLOGY. Feb. 1, 1952, No. 2730/52. Class 40 (2). In a magnetic transducing apparatus for disc records the transducer 108 is carried by a hinged cover 11 and is brought into contact with record on a turntable 14 when the cover 11 is in the closed position. The transducer 108 is made to traverse the surface of the record by means of a leadscrew 96 which moves the transducer carriage 106 when a mechanical coupling between the leadscrew 96 and the turntable 14 is established upon the closing of the cover 14. The coupling takes the form of a one-to-one ratio worm gearing 99, a shaft 101 which enters a circular recess 105 in the central hub 15 of the turntable 14, and a pin 16 on the hub 15 which engages a radial pin 104 on the shaft 101. The carriage 106 is coupled to the leadscrew 96 by means of a spring-loaded tongue 114, Fig. 7, mounted on the carriage 106. When is it desired to traverse'the carriage manually, the tongue 114 may be disengaged from the leadscrew 96 by means of a lever 112, Fig. 6, whose end is terminated by an indicator 36, Fig. 3, on the outside of the cover 11. To carry out the operation the indicator 36 is merely pressed and then moved along an indexing card 34. As the leadscrews performs exactly one revolution to each revolution of the turntable, the transducer will always register correctly with a turn of the recorder track on the record disc which is itself accurately angularly located on the turntable 14 by means of a pin 18 thereon which engages a perforation in the record disc. The record disc comprises a base of paper, plastic or metal liaving a central aperture for engaging the hub 15 of the turntable 14, and has a magnetisable coating on each side. A clip at the centre or at the outer edge provides a convenient means for fastening the index card 34 associated with a particular record.
GB273052A 1951-11-15 1952-02-01 Improvements in or relating to magnetic transducing assembly Expired GB714621A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE509275D BE509275A (en) 1952-02-01
US256431A US2840642A (en) 1951-11-15 1951-11-15 Magnetic transducing assembly
GB273052A GB714621A (en) 1952-02-01 1952-02-01 Improvements in or relating to magnetic transducing assembly
FR1056283D FR1056283A (en) 1952-02-01 1952-02-07 Improvements relating to magnetic transduction assemblies
CH318227D CH318227A (en) 1952-02-01 1952-02-09 Recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB273052A GB714621A (en) 1952-02-01 1952-02-01 Improvements in or relating to magnetic transducing assembly

Publications (1)

Publication Number Publication Date
GB714621A true GB714621A (en) 1954-09-01

Family

ID=9744800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB273052A Expired GB714621A (en) 1951-11-15 1952-02-01 Improvements in or relating to magnetic transducing assembly

Country Status (4)

Country Link
BE (1) BE509275A (en)
CH (1) CH318227A (en)
FR (1) FR1056283A (en)
GB (1) GB714621A (en)

Also Published As

Publication number Publication date
BE509275A (en)
FR1056283A (en) 1954-02-25
CH318227A (en) 1956-12-31

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