GB1149046A - Electrical circuit - Google Patents

Electrical circuit

Info

Publication number
GB1149046A
GB1149046A GB4639366A GB4639366A GB1149046A GB 1149046 A GB1149046 A GB 1149046A GB 4639366 A GB4639366 A GB 4639366A GB 4639366 A GB4639366 A GB 4639366A GB 1149046 A GB1149046 A GB 1149046A
Authority
GB
United Kingdom
Prior art keywords
bridge
control circuit
transistors
load
potentiometers
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
GB4639366A
Inventor
Eric Spetch
William Mclellan
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.)
Cochran and Co Annan Ltd
Original Assignee
Cochran and Co Annan 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 Cochran and Co Annan Ltd filed Critical Cochran and Co Annan Ltd
Priority to GB4639366A priority Critical patent/GB1149046A/en
Publication of GB1149046A publication Critical patent/GB1149046A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/14—Control of position or direction using feedback using an analogue comparing device
    • G05D3/1418—Control of position or direction using feedback using an analogue comparing device with ac amplifier chain

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

1,149,046. Control circuit. COCHRAN & CO., ANNAN Ltd. Oct.17, 1967 [Oct.17 1966], No.46393/66. Headings G1A and G1U. [Also in Divisions H2 and H3] A control circuit comprises a bridge arrangement of potentiometers 17, 18, the first being manually settable, associated with transistors 21, 22, connected back-to-back across opposite terminals of the bridge, such that unbalance of the bridge due to movement of either wiper of the potentiometers causes one or other of these transistors to conduct and energize a lamp 13 or 14 associated with a corresponding radiation responsive silicon controlled rectifier 24 or 23 which is switched on to connect a supply of current to a load circuit 31. The load can comprise the field windings 28, 29 of an A.C. induction motor 30 which is caused to move the wiper of potentiometer 18 in the required direction to rebalance the bridge. The control circuit includes amplifying transistors 12 and protective resistors 15, 16. The SCR's are connected in respective bridge networks 26, 25 to act as single pole A.C. switches. The motor 30 may be of the squirrel cage type and is provided with limit switches 36, 37. Capacitors 33, 34 bring the power factor of the inductors 28, 29 down to unity. Each lamp and its associated SCR are mounted in opaque tubes. Complete electrical isolation between control and load circuits is obtained by use of the radiation link, unlike the arrangement described in Specification 1,105, 874.
GB4639366A 1966-10-17 1966-10-17 Electrical circuit Expired GB1149046A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4639366A GB1149046A (en) 1966-10-17 1966-10-17 Electrical circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4639366A GB1149046A (en) 1966-10-17 1966-10-17 Electrical circuit

Publications (1)

Publication Number Publication Date
GB1149046A true GB1149046A (en) 1969-04-16

Family

ID=10441076

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4639366A Expired GB1149046A (en) 1966-10-17 1966-10-17 Electrical circuit

Country Status (1)

Country Link
GB (1) GB1149046A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138598A (en) * 1983-04-20 1984-10-24 Iveco Magirus Electrical Circuitry for Setting the Position of an Appliance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138598A (en) * 1983-04-20 1984-10-24 Iveco Magirus Electrical Circuitry for Setting the Position of an Appliance
FR2547077A1 (en) * 1983-04-20 1984-12-07 Iveco Magirus ASSEMBLY FOR ADJUSTING THE POSITION OF AN APPARATUS, IN PARTICULAR OF THE ROTATIONAL SCAFFOLDING CARGO NACELLE

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