GB809849A - Improvements in signal synchronizer - Google Patents

Improvements in signal synchronizer

Info

Publication number
GB809849A
GB809849A GB3372456A GB3372456A GB809849A GB 809849 A GB809849 A GB 809849A GB 3372456 A GB3372456 A GB 3372456A GB 3372456 A GB3372456 A GB 3372456A GB 809849 A GB809849 A GB 809849A
Authority
GB
United Kingdom
Prior art keywords
tape
tracks
signal
channels
time
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
GB3372456A
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.)
Sperry Corp
Original Assignee
Sperry Rand Corp
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 Sperry Rand Corp filed Critical Sperry Rand Corp
Publication of GB809849A publication Critical patent/GB809849A/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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/20—Signal processing not specific to the method of recording or reproducing; Circuits therefor for correction of skew for multitrack recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/16—Digital recording or reproducing using non self-clocking codes, i.e. the clock signals are either recorded in a separate clocking track or in a combination of several information tracks

Abstract

809,849. Magnetic recording and reproducing apparatus. SPERRY RAND CORPORATION. Nov. 5, 1956 [Nov. 16, 1955], No. 33724/56. Classes 40 (1) and 40 (2). In a magnetic tape record apparatus employing a plurality of longitudinal tracks for simultaneous reproduction, variation of synchronism between the tracks owing to skewing of the tape is compensated by deriving a difference signal from identical pulsed tracks at the outside edges of the tape, and utilizing said difference signal to apply time delays to the signal channels to correct the synchronization errors between said channels. Fig. 2 illustrates an embodiment of the invention in which numerals 18 to 23, inclusive, indicate a number of transducer heads in contact with a plurality of tracks on a tape 10. The outer heads 18, 23 carry identical pulse signals which are passed through inhibition gates G1, G3 and G2, G4, respectively, of a kind well known in the art, to flip-flop circuits FF-1 or FF-2, according to which input signal is leading, the output signal having a length corresponding to the time difference of the inputs. The signals from the flip-flops FF-1 or FF-2 are fed through rectifiers D1 or D2 to series resistances and capacitors R1, C1 or R2, C2 respectively, and the developed voltages applied to series-connected coils wound on magnetostrictive time delay elements in the circuits of the transducer heads 19 to 22, inclusive, carrying the signal channels. The number of turns on each of the time delay elements are progressively increased in opposite directions so that the greater time-delay required on the channels towards the edge of a skewing tape is proportionately applied.
GB3372456A 1955-11-16 1956-11-05 Improvements in signal synchronizer Expired GB809849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54712455A 1955-11-16 1955-11-16

Publications (1)

Publication Number Publication Date
GB809849A true GB809849A (en) 1959-03-04

Family

ID=24183428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3372456A Expired GB809849A (en) 1955-11-16 1956-11-05 Improvements in signal synchronizer

Country Status (4)

Country Link
CH (1) CH350327A (en)
DE (1) DE1069680B (en)
FR (1) FR1163962A (en)
GB (1) GB809849A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264622A (en) * 1961-10-23 1966-08-02 Ncr Co System for compensating for tape skew and gap scatter
US3325794A (en) * 1961-01-03 1967-06-13 Rca Corp Skew correction system
US3327299A (en) * 1963-06-04 1967-06-20 Minnesota Mining & Mfg Skew control system with plural complementary delay means
JPS49133013A (en) * 1973-04-23 1974-12-20
JPS49133014A (en) * 1973-04-23 1974-12-20

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1141331B (en) * 1959-12-10 1962-12-20 Telefunken Patent Method and arrangement for storing digital information on magnetic tapes
US3103000A (en) * 1960-04-01 1963-09-03 Ibm Skew correction system
NL276212A (en) * 1961-03-21
NL296653A (en) * 1962-08-14

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325794A (en) * 1961-01-03 1967-06-13 Rca Corp Skew correction system
US3264622A (en) * 1961-10-23 1966-08-02 Ncr Co System for compensating for tape skew and gap scatter
US3327299A (en) * 1963-06-04 1967-06-20 Minnesota Mining & Mfg Skew control system with plural complementary delay means
JPS49133013A (en) * 1973-04-23 1974-12-20
JPS49133014A (en) * 1973-04-23 1974-12-20
JPS5348083B2 (en) * 1973-04-23 1978-12-26

Also Published As

Publication number Publication date
FR1163962A (en) 1958-10-03
DE1069680B (en) 1959-11-26
CH350327A (en) 1960-11-30

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