GB1017458A - Creation of Inventions and Patents with Artificial Intelligence

GB1017458A – Improvements in or relating to tape driving systems
– Google Patents

GB1017458A – Improvements in or relating to tape driving systems
– Google Patents
Improvements in or relating to tape driving systems

Info

Publication number
GB1017458A

GB1017458A
GB7215/64A
GB721564A
GB1017458A
GB 1017458 A
GB1017458 A
GB 1017458A
GB 7215/64 A
GB7215/64 A
GB 7215/64A
GB 721564 A
GB721564 A
GB 721564A
GB 1017458 A
GB1017458 A
GB 1017458A
Authority
GB
United Kingdom
Prior art keywords
motor
pulse
pulses
tape
control
Prior art date
1963-03-22
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
GB7215/64A
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.)
1963-03-22
Filing date
1964-02-20
Publication date
1966-01-19

1964-02-20
Application filed by Ampex Corp
filed
Critical
Ampex Corp

1966-01-19
Publication of GB1017458A
publication
Critical
patent/GB1017458A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

H—ELECTRICITY

H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors

H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current

H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power

H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices

H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices

H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only

H02P7/288—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance

H02P7/2885—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using variable impedance whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

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

G11B15/20—Moving record carrier backwards or forwards by finite amounts, i.e. backspacing, forward spacing

H—ELECTRICITY

H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors

H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation

H02P7/2913—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Abstract

1,017,458. Driving magnetic tape. AMPEX CORPORATION. Feb. 20, 1964 [March 22, 1963], No. 7215/64. Heading G5R. [Also in Divisions G3 and H2] A feeding arrangement for a magnetic tape comprises supply and take-up reels with a tape extending between them, a drive capstan in constant non-sliding engagement with the tape, a bi-directional drive motor directly coupled to the capstan, and circuit means for selectively energizing the drive motor, the circuit means including means for providing selected energizing pulses to the motor during acceleration and deceleration. Referring to Fig. 1, the tape passes between reels 12 and 13 and through vacuum chambers 21 and 22 which provide buffer loops and control the drives of the reels. The tensions provided by the vacuum chambers are nearly equal so that a low tension difference exists across the head 17 and the tape guides 37-40 have low friction. The capstan 24 has a high friction surface, e.g. of rubber and is directly coupled to a low armature inertia motor 44 such as a D.C. motor having a planar rotor with printed circuit conductors thereon. Control of motor drive.-The motor 44 is accelerated and decelerated by pulses from a pulse generator 46 controlled by a control circuit 47. After acceleration the motor may run at a constant speed under the control of a servo amplifier 52 provided with an input from a tachometer 49 and “with a reference signal provided by unit 56 under the control of control circuit 47. The pulse generator may comprise a capacitor 61, Fig. 2, coupled to a charging circuit 62 and adapted to be discharged through the motor, shown as an inductance 66 and resistance 69, via a silicon-controlled rectifier 65 or 79. The rectifier keeps the circuit open for half a cycle, so that at the end of a pulse the capacitor 61 is partly charged in the reverse direction in preparation for delivering a pulse of opposite polarity. Since the pulses for starting and stopping are identical the system provides predictable start and stop times and distances. The control circuit 47 may include interlock means for preventing a second command affecting the system whilst a first command is being executed; means for operating a brake at the end of a decelerating pulse; and means for disabling the servo system whilst pulses are applied to the motor, Figs. 4 and 5 (not shown). When operating under servo control, part of the operating current for the motor may be supplied from a constant current source. The pulses may be applied to the motor through the servo system, Fig. 6 (not shown), or the output of the servo amplifier may be used, when saturated by a pulse input, to trigger a pulse generator supplying the motor, Fig. 7 (not shown). Incremental operation.-During recording a start pulse from generator 160, Fig. 8, accelerates the motor which continues under the control of servo 161 until stopped by a stop pulse from generator 162 after a delay determined by a one-shot multivibrator 163, the servo 161 being enabled and disabled by the start and stop pulses. Data may be recorded with the tape stationary or when the tape is at speed and the incremental distance may be controlled by adjusting the delay provided by unit 163. During playback the motor is started as before until data pulses are read in parallel by circuits 165 to provide a single strobe pulse which passes through switch 168 to the stop pulse generator 162. An alternative form of incremental drive for recording uses the circuit of Fig. 2 with both rectifiers 65 and 79 fired so that a full sine wave cycle of current is supplied to the motor. The first half-wave accelerates the motor and the second half-wave decelerates the motor, and the electrical losses can be balanced against frictional losses to ensure that the capstan comes to rest.

GB7215/64A
1963-03-22
1964-02-20
Improvements in or relating to tape driving systems

Expired

GB1017458A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US267175A

US3185364A
(en)

1963-03-22
1963-03-22
Drive system for tape transport system

Publications (1)

Publication Number
Publication Date

GB1017458A
true

GB1017458A
(en)

1966-01-19

Family
ID=23017631
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB7215/64A
Expired

GB1017458A
(en)

1963-03-22
1964-02-20
Improvements in or relating to tape driving systems

Country Status (6)

Country
Link

US
(1)

US3185364A
(en)

BE
(1)

BE645352A
(en)

DE
(1)

DE1449693B2
(en)

GB
(1)

GB1017458A
(en)

NL
(2)

NL6402942A
(en)

SE
(1)

SE337246B
(en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3614757A
(en)

1961-06-28
1971-10-19
Photocircuits Corp
Displacing apparatus

US3935521A
(en)

1961-06-28
1976-01-27
Kollmorgen Corporation
Displacing apparatus

US3326440A
(en)

1963-01-09
1967-06-20
Minnesota Mining & Mfg
High precision tape-transport mechanism

US3487392A
(en)

1963-03-22
1969-12-30
Ampex
Incremental web member drive system

US3293522A
(en)

1963-03-22
1966-12-20
Ampex
Motor drive circuits

NL134911C
(en)

1963-09-06

US3458154A
(en)

1965-08-02
1969-07-29
Dartex Inc
Tape transport

US3482229A
(en)

1966-10-19
1969-12-02
Photocircuits Corp
Tape system with extended speed range

US3425613A
(en)

1967-07-10
1969-02-04
Potter Instrument Co Inc
System for controlling the starting and stopping of a capstan

US3737751A
(en)

1971-06-24
1973-06-05
Ibm
Servomechanism stop control

US4232257A
(en)

1976-05-03
1980-11-04
Ampex Corporation
Web transport capstan control system

FR2395638A1
(en)

1977-06-20
1979-01-19
Cii Honeywell Bull

CONTROL SYSTEM FOR A DIRECT CURRENT ELECTRIC MOTOR WITH INDEPENDENT EXCITATION AND CONSTANT LOAD

FR2405584A1
(en)

1977-10-05
1979-05-04
Cii Honeywell Bull

PROCESS AND SYSTEM FOR SERVICING A DIRECT CURRENT MOTOR WITH INDEPENDENT EXCITATION

Family Cites Families (15)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

NL213346A
(en)

1955-12-30

US2866143A
(en)

1956-08-31
1958-12-23
Cons Electrodynamics Corp
Adjustable speed drive for tape recording systems

US2989260A
(en)

1956-10-31
1961-06-20
Ibm
Hydraulic drive tape handling system

US3050594A
(en)

1957-10-30
1962-08-21
Rca Corp
Position control system

NL126310C
(en)

1957-12-30

US2975991A
(en)

1957-12-30
1961-03-21
Kaiser Aluminium Chem Corp
Strip tension controller

US2968451A
(en)

1958-03-28
1961-01-17
United States Steel Corp
Control for an uncoiler

US2922095A
(en)

1958-04-15
1960-01-19
Litton Industries Inc
Digital-to-analogue converter

US2990484A
(en)

1958-04-17
1961-06-27
Allis Louis Co
Position regulator for adjustable speed drives

GB875473A
(en)

1958-08-06
1961-08-23
British Insulated Callenders
Electrical analogue computing apparatus

US2932778A
(en)

1959-05-06
1960-04-12
Litton Ind Of California
Frequency comparison rate servo

US3105179A
(en)

1960-08-22
1963-09-24
Cook Electric Co
Servo system for magnetic tape machine

US3087663A
(en)

1961-04-13
1963-04-30
James K Anderson
Apparatus for adjusting printing web tension

US3109131A
(en)

1961-09-05
1963-10-29
Richard S Kaszuba
Pulse controlled servo system

US3112052A
(en)

1962-07-16
1963-11-26
Winston Res Corp
Magnetic tape control system

NL
NL137734D
patent/NL137734C/xx
active

1963

1963-03-22
US
US267175A
patent/US3185364A/en
not_active
Expired – Lifetime

1964

1964-02-20
GB
GB7215/64A
patent/GB1017458A/en
not_active
Expired

1964-03-18
BE
BE645352D
patent/BE645352A/xx
unknown

1964-03-19
NL
NL6402942A
patent/NL6402942A/xx
unknown

1964-03-23
SE
SE03577/64A
patent/SE337246B/xx
unknown

1964-03-23
DE
DE19641449693
patent/DE1449693B2/en
active
Pending

Also Published As

Publication number
Publication date

DE1449693B2
(en)

1971-11-25

NL137734C
(en)

US3185364A
(en)

1965-05-25

DE1449693A1
(en)

1968-12-19

BE645352A
(en)

1964-07-16

SE337246B
(en)

1971-08-02

NL6402942A
(en)

1964-09-23

Contact information