GB877210A - Improvements in or relating to web unwinding mechanism - Google Patents

Improvements in or relating to web unwinding mechanism

Info

Publication number
GB877210A
GB877210A GB786257A GB786257A GB877210A GB 877210 A GB877210 A GB 877210A GB 786257 A GB786257 A GB 786257A GB 786257 A GB786257 A GB 786257A GB 877210 A GB877210 A GB 877210A
Authority
GB
United Kingdom
Prior art keywords
compartment
switches
tape
switch
motors
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
GB786257A
Inventor
David Arthur Chalmers
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB786257A priority Critical patent/GB877210A/en
Publication of GB877210A publication Critical patent/GB877210A/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
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/16—Control of operating function, e.g. switching from recording to reproducing by sensing presence, absence or position of record carrier or container
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/60—Guiding record carrier

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

877,210. Automatic level control systems. ELECTRIC & MUSICAL INDUSTRIES Ltd. Feb. 27, 1958 [March 9, 1957], No. 7862/57. Class 38 (4). [Also in Groups XVI, XXXVII and XXXVIII] In a web unwinding mechanism (see Group XVI) a switch 18 is provided in each compartment 11 to control the operation of motors driving the capstans 8a and 9a by opening when a maximum quantity of tape is present in one of these compartments, these motors then being supplied at reduced power through a resistance. Opening of one of these switches also causes, through operation of a relay, a further switch to close to supply the motor driving the corresponding spool to be supplied with reduced power. Further switches 19, provided in compartments 10 of the bins 6 and 7 are closed by lateral pressure of the tape when a compartment contains a predetermined maximum quantity, thus energizing the motor driving the appropriate spool to wind tape thereon from that compartment. Switches 22, provided adjacent the bottom of each compartment 11, are opened when the corresponding compartment is nearly empty to bring the motors driving the spools under the control of switches 19. The direction of tape feed past the transducer 2 may be reversed by operation of a switch, not shown, coupled to mechanism which controls the supply of suction to the suction rollers 4 and 5. Specification 877,209 is referred to.
GB786257A 1957-03-09 1957-03-09 Improvements in or relating to web unwinding mechanism Expired GB877210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB786257A GB877210A (en) 1957-03-09 1957-03-09 Improvements in or relating to web unwinding mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB786257A GB877210A (en) 1957-03-09 1957-03-09 Improvements in or relating to web unwinding mechanism

Publications (1)

Publication Number Publication Date
GB877210A true GB877210A (en) 1961-09-13

Family

ID=9841223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB786257A Expired GB877210A (en) 1957-03-09 1957-03-09 Improvements in or relating to web unwinding mechanism

Country Status (1)

Country Link
GB (1) GB877210A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1190710B (en) * 1961-10-24 1965-04-08 Standard Elektrik Lorenz Ag Arrangement for the guidance of high-speed tape-shaped recording media

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1190710B (en) * 1961-10-24 1965-04-08 Standard Elektrik Lorenz Ag Arrangement for the guidance of high-speed tape-shaped recording media

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