GB978045A - Improvements in or relating to electrical control circuits - Google Patents

Improvements in or relating to electrical control circuits

Info

Publication number
GB978045A
GB978045A GB1150060A GB1150060A GB978045A GB 978045 A GB978045 A GB 978045A GB 1150060 A GB1150060 A GB 1150060A GB 1150060 A GB1150060 A GB 1150060A GB 978045 A GB978045 A GB 978045A
Authority
GB
United Kingdom
Prior art keywords
frequency
dependent
speed
voltage
circuit
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
GB1150060A
Inventor
Stanley Alfred Hickman
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB1150060A priority Critical patent/GB978045A/en
Publication of GB978045A publication Critical patent/GB978045A/en
Expired legal-status Critical Current

Links

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
    • H02P7/2805—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 whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Velocity Or Acceleration (AREA)

Abstract

978,045. Photo-electric measurement of speed. ELECTRIC & MUSICAL INDUSTRIES Ltd. March 28, 1961 [April 1, 1960], No. 11500/60. Heading G1A. [Also in Divisions G5 and H3] An electrical control circuit comprises means for generating pulses of frequency dependent upon the speed of a member, means deriving a voltage dependent upon the frequency, means for generating a control signal on said voltage reaching a predetermined value, arid means for inhibiting production of further control signals until the circuit has been reset. A magnetic tape 1, accelerated by the take up spool rotates a disc 3 which modulates light from a lamp 5 to a phototransistor 6 producing pulses with a speed-dependent repetition frequency. The pulses are rendered of constant amplitude and width by a monostable transistor multivibrator 7 and an integrating circuit, 8, 9 produces a voltage dependent upon their frequency. When this voltage reaches a predetermined value, a transistor in circuit 10 conducts and energizes a relay 11 to bring a capstan into contact with tape 1 and to send a signal to bias one of the transistors of multivibrator 7 to keep relay 11 energized until condenser 9 is discharged in a reset operation.
GB1150060A 1960-04-01 1960-04-01 Improvements in or relating to electrical control circuits Expired GB978045A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1150060A GB978045A (en) 1960-04-01 1960-04-01 Improvements in or relating to electrical control circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1150060A GB978045A (en) 1960-04-01 1960-04-01 Improvements in or relating to electrical control circuits

Publications (1)

Publication Number Publication Date
GB978045A true GB978045A (en) 1964-12-16

Family

ID=9987398

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1150060A Expired GB978045A (en) 1960-04-01 1960-04-01 Improvements in or relating to electrical control circuits

Country Status (1)

Country Link
GB (1) GB978045A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5111382Y1 (en) * 1969-10-07 1976-03-27
JPS5111381Y1 (en) * 1969-06-20 1976-03-27
JPS5136496Y1 (en) * 1969-06-19 1976-09-08
JPS52142813U (en) * 1977-04-14 1977-10-29
GB2188500A (en) * 1986-03-29 1987-09-30 Fichtel & Sachs Ag Frequency switch

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5136496Y1 (en) * 1969-06-19 1976-09-08
JPS5111381Y1 (en) * 1969-06-20 1976-03-27
JPS5111382Y1 (en) * 1969-10-07 1976-03-27
JPS52142813U (en) * 1977-04-14 1977-10-29
GB2188500A (en) * 1986-03-29 1987-09-30 Fichtel & Sachs Ag Frequency switch
US4746820A (en) * 1986-03-29 1988-05-24 Fichtel & Sachs Ag Pulse frequency responsive switch
GB2188500B (en) * 1986-03-29 1990-04-04 Fichtel & Sachs Ag Pulse frequency responsive switch

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