DK7885A - FREQUENCY STABILIZED AND AMPLIFIED CONTROLLED BALLAST SYSTEM - Google Patents

FREQUENCY STABILIZED AND AMPLIFIED CONTROLLED BALLAST SYSTEM Download PDF

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Publication number
DK7885A
DK7885A DK7885A DK7885A DK7885A DK 7885 A DK7885 A DK 7885A DK 7885 A DK7885 A DK 7885A DK 7885 A DK7885 A DK 7885A DK 7885 A DK7885 A DK 7885A
Authority
DK
Denmark
Prior art keywords
frequency control
frequency
transformer
discharge tubes
vapour discharge
Prior art date
Application number
DK7885A
Other languages
Danish (da)
Other versions
DK166557B1 (en
DK7885D0 (en
Inventor
Jacques M Hanlet
Original Assignee
Intent Patent Ag
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 Intent Patent Ag filed Critical Intent Patent Ag
Priority to DK7885A priority Critical patent/DK166557B1/en
Publication of DK7885D0 publication Critical patent/DK7885D0/en
Publication of DK7885A publication Critical patent/DK7885A/en
Application granted granted Critical
Publication of DK166557B1 publication Critical patent/DK166557B1/en

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  • Circuit Arrangements For Discharge Lamps (AREA)
  • Inverter Devices (AREA)

Abstract

Frequency stabilized and amplification controlled ballast system 10 which is connected to an energy source 12 for operation of at least one pair of vapour discharge tubes 40 and 40'. Each of the vapour discharge tubes 40 , 40' contains incandescent filaments 42, 44 and 42' 44' respectively. A frequency control circuit 11 is connected to the energy source 12 and contains a frequency control transformer 43 and a frequency control condenser 50 to provide a constant oscillation signal at a predetermined frequency. A change-over network 13 is connected to the frequency control circuit 11 to provide a pulsing stream dependent upon the constant oscillation signal of the predetermined frequency. The induction circuit 15 is connected to the change-over network 13 and the frequency control circuit 11 and contains an inverter transformer 78 and connection condensers 86 and 88 for generating a voltage across the vapour discharge tubes 40 and 40'. Automatic amplification control circuits 17 are contained in the inverter transformer 78 and consist of a pair of secondary windings 80 and 81 which are wound in such a way that a negative feedback voltage is provided to each of the transistors 70 and 70' in the change-over network 13. The inverter transformer 78 has a pair of primary windings 82 and 84 which operate in turns and are connected to the primary winding 45 of the frequency control transformer 43 to provide a repetitive cycle. The first and the second connection condensers 86 and 88 are connected to the primary windings 82 and 84 of the inverter transformer 78 and to the incandescent filaments 42 and 42' of the vapour discharge tubes 40 and 40' to discharge the induced voltage across the tubes 40 and 40'. <IMAGE>
DK7885A 1985-01-07 1985-01-07 Frequency stabilized ballast system DK166557B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK7885A DK166557B1 (en) 1985-01-07 1985-01-07 Frequency stabilized ballast system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK7885 1985-01-07
DK7885A DK166557B1 (en) 1985-01-07 1985-01-07 Frequency stabilized ballast system

Publications (3)

Publication Number Publication Date
DK7885D0 DK7885D0 (en) 1985-01-07
DK7885A true DK7885A (en) 1986-07-08
DK166557B1 DK166557B1 (en) 1993-06-07

Family

ID=8089484

Family Applications (1)

Application Number Title Priority Date Filing Date
DK7885A DK166557B1 (en) 1985-01-07 1985-01-07 Frequency stabilized ballast system

Country Status (1)

Country Link
DK (1) DK166557B1 (en)

Also Published As

Publication number Publication date
DK166557B1 (en) 1993-06-07
DK7885D0 (en) 1985-01-07

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Legal Events

Date Code Title Description
B1 Patent granted (law 1993)
PBP Patent lapsed