GB1223891A – Data transfer
– Google Patents
GB1223891A – Data transfer
– Google Patents
Data transfer
Info
Publication number
GB1223891A
GB1223891A
GB07257/68A
GB1725768A
GB1223891A
GB 1223891 A
GB1223891 A
GB 1223891A
GB 07257/68 A
GB07257/68 A
GB 07257/68A
GB 1725768 A
GB1725768 A
GB 1725768A
GB 1223891 A
GB1223891 A
GB 1223891A
Authority
GB
United Kingdom
Prior art keywords
tape
pulse
block
copy control
data
Prior art date
1967-04-12
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
GB07257/68A
Inventor
Barry Michael Epstein
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.)
AT&T Corp
Original Assignee
Western Electric Co 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.)
1967-04-12
Filing date
1968-04-10
Publication date
1971-03-03
1968-04-10
Application filed by Western Electric Co Inc
filed
Critical
Western Electric Co Inc
1971-03-03
Publication of GB1223891A
publication
Critical
patent/GB1223891A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
G11B20/10—Digital recording or reproducing
G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
G11B20/1201—Formatting, e.g. arrangement of data block or words on the record carriers on tapes
G11B20/1202—Formatting, e.g. arrangement of data block or words on the record carriers on tapes with longitudinal tracks only
G11B20/1205—Formatting, e.g. arrangement of data block or words on the record carriers on tapes with longitudinal tracks only for discontinuous data, e.g. digital information signals, computer programme data
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
G06K1/14—Methods or arrangements for marking the record carrier in digital fashion by transferring data from a similar or dissimilar record carrier
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
G11B15/005—Programmed access in sequence to indexed parts of tracks of operating tapes, by driving or guiding the tape
Abstract
1,223,891. Transfer between digital data stores. WESTERN ELECTRIC CO. Inc. 10 April, 1968 [12 April, 1967], No. 17257/68. Heading G4C. Data is tranferred from a first tape to a second tape in response to detection of the trailing edge of a first copy control pulse on the first tape and stopped in response to detection of the trailing edge of a second such pulse, the first tape then being reversed to before the second pulse. Blocks of data recorded continuously on a multi-track magnetic «data» tape are transferred to a multi-track magnetic «computer» tape with insertion of inter-block gaps as follows. A separate track of the data tape holds a copy control «pulse» for each block. When the leading edge of a given copy control «pulse» is read the computer tape is started (assuming this block is required-see next paragraph) and brought to operating speed by the time the trailing edge of the copy control «pulse» is read, the latter event initiating transfer of the associated block to the computer tape. When the trailing edge of the next copy control «pulse» is read, transfer ceases, both tapes are stopped, and the data tape is driven in reverse for an interval defined by a single-shot to permit it, on starting forward again, to reach operating speed before encountering the leading edge of the last-mentioned copy control «pulse», when the above operations occur for the next block. The control circuits also respond to transducers in the tape drives indicating direction of tape movement. Each copy control «pulse» consists of 80 bits, the first 10 being ones, the next 36 specifying the address of the block and the last 34 being ones. A count-10 counter and a count- 36 counter, driven in turn by bit-time clock pulses from another track on the data tape, prevent the trailing edges of bits in the blockaddress portion being taken as the trailing edge of the copy control «pulse». As each copy control «pulse» is read, the block address portion is passed into a shift register and compared with the next of a plurality of addresses from an address store. Transfer of a block as described above, including movement of the computer tape, only occurs if the comparison on the last but one copy control «pulse» gave equality. The address store may be a magnetic tape, disc or drum or a punched card reader, switches or computer. Reformatting occurs during transfer, using a plugboard, followed by a scanner switch for conversion from parallel to serial-parallel. The scanner switch is driven by the bit-time clock pulses from the data tape, frequency-multiplied. These frequency-multiplied clock pulses may also drive a counter which is started at the beginning of each block by a frame (block) pulse from a further track on the data tape. The count is compared with a plurality of numbers set up by the operator to enable gates to pass only certain portions of each block emerging from the scanner switch to the computer tape. A block may consist of digitized samples from 48 inputs, recorded 3 in line across the data tape at each position. The data tape may also hold parity information.
GB07257/68A
1967-04-12
1968-04-10
Data transfer
Expired
GB1223891A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US63035967A
1967-04-12
1967-04-12
Publications (1)
Publication Number
Publication Date
GB1223891A
true
GB1223891A
(en)
1971-03-03
Family
ID=24526852
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB07257/68A
Expired
GB1223891A
(en)
1967-04-12
1968-04-10
Data transfer
Country Status (7)
Country
Link
US
(1)
US3533071A
(en)
BE
(1)
BE713638A
(en)
DE
(1)
DE1774125B1
(en)
FR
(1)
FR1562437A
(en)
GB
(1)
GB1223891A
(en)
NL
(1)
NL141997B
(en)
SE
(1)
SE327582B
(en)
Families Citing this family (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE2052050A1
(en)
*
1969-10-28
1971-05-19
Fujitsu Ltd
Control arrangement for a magnetic tape unit
US3740720A
(en)
*
1971-01-25
1973-06-19
Ibm
Method adapted for continually updating information on a magnetic tape
US3729712A
(en)
*
1971-02-26
1973-04-24
Eastman Kodak Co
Information storage and retrieval system
US3787827A
(en)
*
1972-10-05
1974-01-22
Ohio Nuclear
Real time data compression system
US3824563A
(en)
*
1973-04-13
1974-07-16
Ibm
Data storage track padding apparatus
US4054947A
(en)
*
1975-07-14
1977-10-18
Standard Oil Company (Indiana)
Computer to tape deck interface
GB2079516B
(en)
*
1980-06-25
1985-05-22
Sundstrand Data Control
Recording digital data
Family Cites Families (8)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2976372A
(en)
*
1959-03-02
1961-03-21
Sidney O Sampson
Magnetic tape reproducing system
US3028454A
(en)
*
1959-04-20
1962-04-03
Kohorn Henry Von
Selective recording of continuous information
US3064516A
(en)
*
1960-06-16
1962-11-20
Leblanc Corp G
Musical instrument with improved spring bearing
US3315242A
(en)
*
1963-04-24
1967-04-18
Ibm
Modulation and transfer of information achieved by speed differential
US3206133A
(en)
*
1963-09-27
1965-09-14
Robert L Forster
Tape control system
US3365702A
(en)
*
1964-01-14
1968-01-23
Herner & Company
Magnetic-tape information storage and retrieval
US3405238A
(en)
*
1964-05-06
1968-10-08
Hurvitz Hyman
Means to eliminate redundant information
US3260340A
(en)
*
1964-06-25
1966-07-12
Ibm
Revision system for data recording and printing apparatus
1967
1967-04-12
US
US630359A
patent/US3533071A/en
not_active
Expired – Lifetime
1968
1968-04-09
NL
NL686805009A
patent/NL141997B/en
unknown
1968-04-09
SE
SE04786/68A
patent/SE327582B/xx
unknown
1968-04-10
GB
GB07257/68A
patent/GB1223891A/en
not_active
Expired
1968-04-11
FR
FR1562437D
patent/FR1562437A/fr
not_active
Expired
1968-04-12
BE
BE713638D
patent/BE713638A/xx
unknown
1968-04-13
DE
DE19681774125
patent/DE1774125B1/en
active
Pending
Also Published As
Publication number
Publication date
US3533071A
(en)
1970-10-06
DE1774125B1
(en)
1971-12-16
NL141997B
(en)
1974-04-16
SE327582B
(en)
1970-08-24
FR1562437A
(en)
1969-04-04
BE713638A
(en)
1968-08-16
NL6805009A
(en)
1968-10-14
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