GB542107A - Improvements in electric timing circuits - Google Patents

Improvements in electric timing circuits

Info

Publication number
GB542107A
GB542107A GB1604740A GB1604740A GB542107A GB 542107 A GB542107 A GB 542107A GB 1604740 A GB1604740 A GB 1604740A GB 1604740 A GB1604740 A GB 1604740A GB 542107 A GB542107 A GB 542107A
Authority
GB
United Kingdom
Prior art keywords
condenser
welding
grid
discharge
charging
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
GB1604740A
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.)
BERTRAM GEORGE HIGGINS
British Thomson Houston Co Ltd
Original Assignee
BERTRAM GEORGE HIGGINS
British Thomson Houston Co 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 BERTRAM GEORGE HIGGINS, British Thomson Houston Co Ltd filed Critical BERTRAM GEORGE HIGGINS
Priority to GB1604740A priority Critical patent/GB542107A/en
Publication of GB542107A publication Critical patent/GB542107A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching
    • H03K17/288—Modifications for introducing a time delay before switching in tube switches

Landscapes

  • Generation Of Surge Voltage And Current (AREA)

Abstract

542,107. Switching systems for electric welding. BRITISH THOMSON-HOUSTON CO., Ltd., and HIGGINS, B. G. Nov. 4, 1940, No. 16047. Addition to 463,561. [Class 38 (iv)] The period of application of supply to an electric weld is determined, automatically, by the rate of discharge of the condenser 10 which is normally on charge from the secondary 7 through the rectifier 11, is disconnected therefrom when the switches 18, 19 are moved over by manuallycontrolled energization of their operating coil 16, and thus connected to the grid of the discharge device 2 the anode current of which is adapted to energize the coil 3 and close the welding supply contact. The condenser makes the grid positive and the valve 2 conductive with consequent closure of the contactor; the slow discharge of the condenser allows the negative bias on the grid to re-establish control after a time and thus render the valve non-conductive again and break the energizing circuits of the welding contactor. As the charging of the condenser takes place when there is no welding load on the system, this charging is unaffected by variations of voltage and accurate timing is ensured.
GB1604740A 1940-11-04 1940-11-04 Improvements in electric timing circuits Expired GB542107A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1604740A GB542107A (en) 1940-11-04 1940-11-04 Improvements in electric timing circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1604740A GB542107A (en) 1940-11-04 1940-11-04 Improvements in electric timing circuits

Publications (1)

Publication Number Publication Date
GB542107A true GB542107A (en) 1941-12-24

Family

ID=10070169

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1604740A Expired GB542107A (en) 1940-11-04 1940-11-04 Improvements in electric timing circuits

Country Status (1)

Country Link
GB (1) GB542107A (en)

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