GB1371109A – Tape tension control in tape recorders
– Google Patents
GB1371109A – Tape tension control in tape recorders
– Google Patents
Tape tension control in tape recorders
Info
Publication number
GB1371109A
GB1371109A
GB5426471A
GB5426471A
GB1371109A
GB 1371109 A
GB1371109 A
GB 1371109A
GB 5426471 A
GB5426471 A
GB 5426471A
GB 5426471 A
GB5426471 A
GB 5426471A
GB 1371109 A
GB1371109 A
GB 1371109A
Authority
GB
United Kingdom
Prior art keywords
tape
tension
capstan
power amplifier
loop
Prior art date
1971-04-15
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
GB5426471A
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.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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.)
1971-04-15
Filing date
1971-11-23
Publication date
1974-10-23
1971-11-23
Application filed by Bell and Howell Co
filed
Critical
Bell and Howell Co
1974-10-23
Publication of GB1371109A
publication
Critical
patent/GB1371109A/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
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
G11B15/66—Threading; Loading; Automatic self-loading
G11B15/665—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container
G11B15/6651—Threading; Loading; Automatic self-loading by extracting loop of record carrier from container to pull the record carrier against non rotating heads
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
G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension
Abstract
1371109 Automatic tension control BELL & HOWELL CO 23 Nov 1971 [15 April 1971] 54264/71 Heading G3R In apparatus using information recording tape located in a tape containing means, tape is withdrawn from the tape containing means, formed into a loop and placed in driving engagement with a capstan, the tension in the tape loop being retroactively controlled. In an embodiment, tension of magnetic tape from a cassette is equalized on both sides of a capstan by a closed-loop tension control for each side which control motors driving respective tape spools. The tension in tape portion 33 on one side of capstan 24 is measured by feeler 60 to provide an actual tension signal from strain gauges 61, 62, which is compared in an operational amplifier 43 with a tension reference from a potentiometer 54, that is across a regulated supply 55, to provide a tension error signal which controls motor 71, driving spool 20, through a power amplifier 68 which includes transistors 73, 78. The closed loop bandwidth and stability are increased by an integrating capacitor 210 across amplifier 43, by providing a bias signal to the power amplifier via switch 96 and variable resistor 98, and by capacitor 93 and RC network 94 in the power amplifier 68, which includes a speed feedback path 91. To reduce tension in the tape whilst it is withdrawn from, or returned to, the cassette 13 i.e. when the control system is open loop, a switch 89 opens to add resistance 300 to the spool drive motor circuit. This motor is stopped by closing switch 92, thus grounding the input to the power amplifier. The tension in tape portion 34 is similarly controlled through amplifier 48, power amplifier 168 and motor 171. Motors 71, 171 and capstan motor 24, which is controlled through variable resistor 201 and reversing switch 200, may be of permanent magnet type. The tape may be withdrawn from, or replaced into, the cassette, and positioned around capstan 24 by apparatus as disclosed in Specification 1370156
GB5426471A
1971-04-15
1971-11-23
Tape tension control in tape recorders
Expired
GB1371109A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US13417271A
1971-04-15
1971-04-15
Publications (1)
Publication Number
Publication Date
GB1371109A
true
GB1371109A
(en)
1974-10-23
Family
ID=22462085
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5426471A
Expired
GB1371109A
(en)
1971-04-15
1971-11-23
Tape tension control in tape recorders
Country Status (5)
Country
Link
US
(1)
US3734426A
(en)
JP
(1)
JPS5526536B1
(en)
DE
(1)
DE2217348C2
(en)
FR
(1)
FR2136010A5
(en)
GB
(1)
GB1371109A
(en)
Families Citing this family (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4063139A
(en)
*
1975-04-14
1977-12-13
General Electric Company
Tape drive motor control circuit
US4030131A
(en)
*
1975-08-20
1977-06-14
Honeywell Inc.
Slack tape loader
WO1980002330A1
(en)
*
1979-04-16
1980-10-30
T Young
Tape transport
JPS5637852A
(en)
*
1979-09-04
1981-04-11
Sony Corp
Tape run driver of vtr
US4410149A
(en)
*
1981-10-07
1983-10-18
Eastman Technology, Inc.
Transport apparatus for use with a linear tape recorder
JPS5977656A
(en)
*
1982-09-17
1984-05-04
アムペックス コーポレーシヨン
Reel servo device for tape feeder
JPS5982661A
(en)
*
1982-11-01
1984-05-12
Victor Co Of Japan Ltd
Magnetic recording and reproducing device
US4533856A
(en)
*
1983-04-18
1985-08-06
Combustion Engineering, Inc.
Submerged scraper conveyor automatic speed control
US4522351A
(en)
*
1983-09-30
1985-06-11
Lockheed Electronics Company, Inc.
Motor differential drive reel tensioning system
JPS61148654A
(en)
*
1984-12-21
1986-07-07
Fujitsu Ltd
Tape feeding system
US20060285240A1
(en)
*
2005-06-16
2006-12-21
Quantum Corporation
Environmental watch device for magnetic storage
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3244954A
(en)
*
1962-01-30
1966-04-05
Minnesota Mining & Mfg
Tape tension motor control circuit
US3488696A
(en)
*
1967-05-15
1970-01-06
Potter Instrument Co Inc
Proportional reel servo system
US3535441A
(en)
*
1967-12-29
1970-10-20
Westel Co
Tape tension control system for magnetic tape recorder
US3478985A
(en)
*
1968-02-05
1969-11-18
Tally Corp
Tape transport
US3497154A
(en)
*
1968-03-29
1970-02-24
Ampex
Tape tension means
US3730613A
(en)
*
1970-11-16
1973-05-01
Bell & Howell Co
Information recording and replay methods and apparatus
1971
1971-04-15
US
US00134172A
patent/US3734426A/en
not_active
Expired – Lifetime
1971-11-22
JP
JP9320771A
patent/JPS5526536B1/ja
active
Pending
1971-11-23
GB
GB5426471A
patent/GB1371109A/en
not_active
Expired
1972
1972-03-10
FR
FR7208518A
patent/FR2136010A5/fr
not_active
Expired
1972-04-11
DE
DE2217348A
patent/DE2217348C2/en
not_active
Expired
Also Published As
Publication number
Publication date
DE2217348A1
(en)
1972-12-14
US3734426A
(en)
1973-05-22
JPS5526536B1
(en)
1980-07-14
DE2217348C2
(en)
1986-06-12
FR2136010A5
(en)
1972-12-22
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(en)
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Legal Events
Date
Code
Title
Description
1975-03-05
PS
Patent sealed [section 19, patents act 1949]
1984-05-16
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1988-07-13
PCNP
Patent ceased through non-payment of renewal fee
