GB1371671A – Magnetic tape transport
– Google Patents
GB1371671A – Magnetic tape transport
– Google Patents
Magnetic tape transport
Info
Publication number
GB1371671A
GB1371671A
GB382972A
GB382972A
GB1371671A
GB 1371671 A
GB1371671 A
GB 1371671A
GB 382972 A
GB382972 A
GB 382972A
GB 382972 A
GB382972 A
GB 382972A
GB 1371671 A
GB1371671 A
GB 1371671A
Authority
GB
United Kingdom
Prior art keywords
loop
reel
speed
reels
rewind
Prior art date
1972-01-27
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
GB382972A
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.)
Ampex Corp
Original Assignee
Ampex 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.)
1972-01-27
Filing date
1972-01-27
Publication date
1974-10-23
1972-01-27
Application filed by Ampex Corp
filed
Critical
Ampex Corp
1972-01-27
Priority to GB5805273A
priority
Critical
patent/GB1371672A/en
1972-01-27
Priority to GB382972A
priority
patent/GB1371671A/en
1974-10-23
Publication of GB1371671A
publication
Critical
patent/GB1371671A/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
G11B15/56—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 the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith
G11B15/58—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 the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith with vacuum column
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
G11B15/1883—Driving; Starting; Stopping; Arrangements for control or regulation thereof for record carriers inside containers
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
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
G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
G11B15/67581—Guiding containers, e.g. loading, ejecting cassettes with pivoting movement of the cassette holder
Abstract
1371671 Automatic control of tension AMPEX CORP 27 Jan 1972 3829/72 Heading G3R [Also in Division G5] In a magnetic tape transport system comprising a capstan 28 Fig.2 and transducing heads 29, 31 between a pair of reels 41, 43 and in which tape loops 36, 37 are tensioned by differential pressure in columns 17 having sensing means for controlling the reel drives, the sides of the columns 17 diverge with increased loop length whereby the tape tension is increased with length and as shown, the loop 36 on the side of the take-up spool 41 is arranged to be longer than the loop 37 on the side of the supply spool 43 whereby frictional drag on the heads 29, 31 is compensated for. The tape tension is also thereby equalized on opposite sides of the capstan 28 to avoid slippage; there being no pinch roller provided. The loops 36, 37 are sensed by a pair of photo-cells 26 illuminated from strip lamps 24. During fast-rewind, only the loop in the column 17 associated with the supply reel 41 Fig.8 is used to control the motors for the reels 41, 43. In operation the fast-rewind supply reel 41 is driven to maintain a long loop towards position 163 and is decreased in speed only when the length is exceeded. Similarly the take-up reel 43 on fastrewind tries to maintain a short loop and is decreased in speed only when the loop is short of the position 168. The arrangement is therefore such that at least one of the reels 41, 43 will be running at its maximum speed and a maximum possible speed of rewind is obtained. The fastrewind means forms the subject of the claims of Specification 1371672. The complete system of automatic control is described with reference to Fig.7 (not shown) which illustrates a circuit including the controller (109) for amplifiers (133, 134) driving the reel motors (135, 136) and associated with error detectors (141, 142) incorporating the photo-cells 26 Fig.2.
GB382972A
1972-01-27
1972-01-27
Magnetic tape transport
Expired
GB1371671A
(en)
Priority Applications (2)
Application Number
Priority Date
Filing Date
Title
GB5805273A
GB1371672A
(en)
1972-01-27
1972-01-27
Magnetic tape transport
GB382972A
GB1371671A
(en)
1972-01-27
1972-01-27
Magnetic tape transport
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB382972A
GB1371671A
(en)
1972-01-27
1972-01-27
Magnetic tape transport
Publications (1)
Publication Number
Publication Date
GB1371671A
true
GB1371671A
(en)
1974-10-23
Family
ID=9765724
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB382972A
Expired
GB1371671A
(en)
1972-01-27
1972-01-27
Magnetic tape transport
Country Status (1)
Country
Link
GB
(1)
GB1371671A
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2452152A1
(en)
*
1979-03-22
1980-10-17
Sony Corp
CASSETTE RECORDING APPARATUS
FR2526201A1
(en)
*
1982-05-03
1983-11-04
Mfe Corp
CASSETTE TAPE DRIVING DEVICE
1972
1972-01-27
GB
GB382972A
patent/GB1371671A/en
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2452152A1
(en)
*
1979-03-22
1980-10-17
Sony Corp
CASSETTE RECORDING APPARATUS
FR2526201A1
(en)
*
1982-05-03
1983-11-04
Mfe Corp
CASSETTE TAPE DRIVING DEVICE
GB2121230A
(en)
*
1982-05-03
1983-12-14
Mfe Corp
Streaming cassette tape transport
US4514775A
(en)
*
1982-05-03
1985-04-30
Mfe Corporation
Streaming cassette tape transport
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Legal Events
Date
Code
Title
Description
1975-03-05
PS
Patent sealed
1976-08-25
PLNP
Patent lapsed through nonpayment of renewal fees
