GB1204651A - Electrical current flow indicating system - Google Patents

Electrical current flow indicating system

Info

Publication number
GB1204651A
GB1204651A GB4369A GB4369A GB1204651A GB 1204651 A GB1204651 A GB 1204651A GB 4369 A GB4369 A GB 4369A GB 4369 A GB4369 A GB 4369A GB 1204651 A GB1204651 A GB 1204651A
Authority
GB
United Kingdom
Prior art keywords
thyristor
current
circuit
current flow
equipment
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
GB4369A
Inventor
Roland Eric Gunther
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1204651A publication Critical patent/GB1204651A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Conversion In General (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1,204,651. Current flow indicator. R. E. GUNTHER. Jan.1, 1969 [Feb.23, 1968], No.43/69. Heading G1U. A current flow indicator system for indicating current flow in A.C. powered equipment 3 incorporates a thyristor 6 for connection with its anode cathode path in series between an A. C. power source 1 and the equipment 3, a circuit 7 for triggering the thyristor, when so coupled, from the A. C. source and a neon indicator 4 forming part of a circuit for connection in parallel with the equipment, the indicator circuit having a current demand substantially lower than the holding current of the thyristor so that in the event that current does not flow in the equipment, the thyristor holding current will not be maintained and the neon will not operate. A variable resistor may be connected in parallel with the neon circuit to provide a sensitivity adjustment, Fig.4 (not shown). A triac may be used in place of the thyristor to provide conduction on both half cycles of the supply Fig.3 (not shown). The thyristor may be fixed from the tapping point of a series RC arrangement connected between its anode and cathode, Fig. 2 (not shown).
GB4369A 1968-02-23 1969-01-01 Electrical current flow indicating system Expired GB1204651A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70776068A 1968-02-23 1968-02-23

Publications (1)

Publication Number Publication Date
GB1204651A true GB1204651A (en) 1970-09-09

Family

ID=24843067

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4369A Expired GB1204651A (en) 1968-02-23 1969-01-01 Electrical current flow indicating system

Country Status (3)

Country Link
DE (1) DE1908623A1 (en)
FR (1) FR1597880A (en)
GB (1) GB1204651A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739757A1 (en) * 2004-04-20 2007-01-03 Sony Corporation Constant current driver, back light source and color liquid crystal display

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551880B1 (en) * 1983-09-14 1986-03-21 Syrelec CURRENT DETECTION CIRCUIT WITH LOW DISSIPATION OF ACTIVE POWER AND CONTROL CIRCUIT OF AN ELECTRONIC DEVICE EQUIPPED WITH SUCH A DETECTION CIRCUIT
DE3522586A1 (en) * 1985-06-25 1987-01-22 Telefunken Electronic Gmbh CIRCUIT TO DETECT THE CURRENT FLOW OF A TRIAC
DE4011193A1 (en) * 1990-04-04 1991-10-10 Siemens Ag Current supply monitoring in PCM system - has opto-coupler between switch transistor and thyristor monitor activating signal device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739757A1 (en) * 2004-04-20 2007-01-03 Sony Corporation Constant current driver, back light source and color liquid crystal display
EP1739757A4 (en) * 2004-04-20 2008-03-19 Sony Corp Constant current driver, back light source and color liquid crystal display
US7538497B2 (en) 2004-04-20 2009-05-26 Sony Corporation Constant current driver, back light source and color liquid crystal display
EP2363894A3 (en) * 2004-04-20 2011-12-14 Sony Corporation Constant current driving unit, backlight light source unit and color liquid crystal display apparatus

Also Published As

Publication number Publication date
DE1908623A1 (en) 1969-09-18
FR1597880A (en) 1970-06-29

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees