GB722315A - Improvements in apparatus for starting and operating gaseous discharge devices - Google Patents

Improvements in apparatus for starting and operating gaseous discharge devices

Info

Publication number
GB722315A
GB722315A GB31184/50A GB3118450A GB722315A GB 722315 A GB722315 A GB 722315A GB 31184/50 A GB31184/50 A GB 31184/50A GB 3118450 A GB3118450 A GB 3118450A GB 722315 A GB722315 A GB 722315A
Authority
GB
United Kingdom
Prior art keywords
secondary winding
windings
core
winding
voltage
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
GB31184/50A
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.)
Advance Transformer Co
Original Assignee
Advance Transformer Co
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 Advance Transformer Co filed Critical Advance Transformer Co
Publication of GB722315A publication Critical patent/GB722315A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08High-leakage transformers or inductances
    • H01F38/10Ballasts, e.g. for discharge lamps

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

722,315. Supply systems for space-discharge apparatus; transformers. ADVANCE TRANSFORMER CO. Dec. 21, 1950 [Dec. 29, 1949], No. 31184/50. Classes 38 (2) and 38 (4). Two gaseous discharge devices, e.g. fluorescent lamps 24, 25, are connected to a starting and operating transformer 10 or 10<SP>1</SP> which comprises an elongated shell-type magnetic iron core 14, 15 which forms a single magnetic circuit, a primary winding 11 connected across an A.C. source 31 of voltage insufficient to ignite either device, and first and second secondary windings 12, 13 magnetically coupled to the primary winding and series connected end to end in the order stated with the first secondary winding 12 connected between the other two windings 11, 13, the second secondary winding 13 being mounted at one end of the core, the primary winding 11 at the centre of the core, and the first secondary winding 12 at the other end of the core and spaced, e.g. with the interposition of shunts 16 and air gaps 17, from the other two windings to give it a very high leakage reactance; the first device is connected across at least the first secondary winding 12 but not the second secondary winding 13, the second device is connected across at least both the secondary windings 12, 13, which latter are connected in voltage opposition at open circuit, and the first secondary winding 12 provides a high initial voltage to start the first device whereafter it provides a component in phase with the second secondary winding 13 to start the second device, and presents a high impedance during running to force the major flow of current through the series circuit of the two devices and the second secondary winding 13. Alternatively to the lamp connections shown, the first lamp may be connected across only the first secondary winding and the second lamp across all three windings, and in both cases a condenser 26 may be serially connected with the first device to correct the P.F. and to assist the voltage phase shift of the first secondary winding. Specification 565,843 is referred to.
GB31184/50A 1949-12-29 1950-12-21 Improvements in apparatus for starting and operating gaseous discharge devices Expired GB722315A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US722315XA 1949-12-29 1949-12-29

Publications (1)

Publication Number Publication Date
GB722315A true GB722315A (en) 1955-01-26

Family

ID=22106355

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31184/50A Expired GB722315A (en) 1949-12-29 1950-12-21 Improvements in apparatus for starting and operating gaseous discharge devices

Country Status (1)

Country Link
GB (1) GB722315A (en)

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