GB1363085A - Fluorescent tube operating circuit - Google Patents

Fluorescent tube operating circuit

Info

Publication number
GB1363085A
GB1363085A GB5661071A GB5661071A GB1363085A GB 1363085 A GB1363085 A GB 1363085A GB 5661071 A GB5661071 A GB 5661071A GB 5661071 A GB5661071 A GB 5661071A GB 1363085 A GB1363085 A GB 1363085A
Authority
GB
United Kingdom
Prior art keywords
circuit
lamp
discharge
volt
tapping
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
GB5661071A
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
Priority to GB5661071A priority Critical patent/GB1363085A/en
Publication of GB1363085A publication Critical patent/GB1363085A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/042—Starting switches using semiconductor devices
    • H05B41/044—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes
    • H05B41/046—Starting switches using semiconductor devices for lamp provided with pre-heating electrodes using controlled semiconductor devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B3/00—Apparatus for testing the eyes; Instruments for examining the eyes
    • A61B3/10—Objective types, i.e. instruments for examining the eyes independent of the patients' perceptions or reactions
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/34—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp to provide a sequence of flashes

Abstract

1363085 Supply system for discharge tubes J E F HOLLEY 13 Oct 1972 [6 Dec 1971] 56610/71 Heading H2H [Also in Division A5] A supply circuit for a discharge lamp PF comprises a discharge initiating circuit, a circuit for maintaining the discharge without illumination of the lamp and a circuit for intermittently switching on the lamp to produce light pulses. The lamp is used in a tachistoscope and a 400 volts discharge initiating potential is provided by a Cockcroft tripler circuit CT connected to the 100 volt tapping of a mains transformer. The discharge maintaining circuit is connected to a 40 volt tapping of the transformer and a 7 volt tapping supplies a heating current to the cathode of the lamp. A further seven volt tapping supplies power to a trigger circuit for a transistor TR which is switched on for successively increasing durations to enable the lamp to emit flicker-free light pulses of successively increasing durations.
GB5661071A 1972-10-13 1972-10-13 Fluorescent tube operating circuit Expired GB1363085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5661071A GB1363085A (en) 1972-10-13 1972-10-13 Fluorescent tube operating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5661071A GB1363085A (en) 1972-10-13 1972-10-13 Fluorescent tube operating circuit

Publications (1)

Publication Number Publication Date
GB1363085A true GB1363085A (en) 1974-08-14

Family

ID=10477069

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5661071A Expired GB1363085A (en) 1972-10-13 1972-10-13 Fluorescent tube operating circuit

Country Status (1)

Country Link
GB (1) GB1363085A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397768A1 (en) * 1977-07-11 1979-02-09 Energy Conversion Devices Inc DEVICE AND PROCEDURE FOR THE SUPPLY OF A GAS DISCHARGE LAMP AND THEIR APPLICATION, IN PARTICULAR TO IMAGES TO BE MOMENTARY AND REPEATED IN DOCUMENT REPRODUCTION MACHINES
GB2168554A (en) * 1984-11-08 1986-06-18 Fuji Xerox Co Ltd Power supply for flash discharge lamp
DE3545147A1 (en) * 1984-12-21 1986-07-03 The Gerber Scientific Instrument Co., South Windsor, Conn. FLASH LAMP UNIT

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397768A1 (en) * 1977-07-11 1979-02-09 Energy Conversion Devices Inc DEVICE AND PROCEDURE FOR THE SUPPLY OF A GAS DISCHARGE LAMP AND THEIR APPLICATION, IN PARTICULAR TO IMAGES TO BE MOMENTARY AND REPEATED IN DOCUMENT REPRODUCTION MACHINES
GB2168554A (en) * 1984-11-08 1986-06-18 Fuji Xerox Co Ltd Power supply for flash discharge lamp
US4687971A (en) * 1984-11-08 1987-08-18 Fuji Xerox Company, Limited Power supply for discharge lamp
DE3545147A1 (en) * 1984-12-21 1986-07-03 The Gerber Scientific Instrument Co., South Windsor, Conn. FLASH LAMP UNIT

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Legal Events

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