GB1487585A - Lamp switch circuit - Google Patents

Lamp switch circuit

Info

Publication number
GB1487585A
GB1487585A GB16926/77A GB1692677A GB1487585A GB 1487585 A GB1487585 A GB 1487585A GB 16926/77 A GB16926/77 A GB 16926/77A GB 1692677 A GB1692677 A GB 1692677A GB 1487585 A GB1487585 A GB 1487585A
Authority
GB
United Kingdom
Prior art keywords
switch circuit
lamp switch
nov
heading
alone
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
GB16926/77A
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of GB1487585A publication Critical patent/GB1487585A/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
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3922—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations and measurement of the incident light
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/04036—Details of illuminating systems, e.g. lamps, reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1487585 Control systems for gas discharge lamps XEROX CORP 12 Nov 1974 [19 Nov 1973] 16926/77 Divided out of 1487584 Heading H2H The description is identical with that of Specification 1,487,584, but the claims are directed to the switch circuit, both alone and in combination with the lamp control circuit which is claimed in that Specification.
GB16926/77A 1973-11-19 1974-11-12 Lamp switch circuit Expired GB1487585A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US416921A US3904922A (en) 1973-11-19 1973-11-19 Lamp control and lamp switch circuit

Publications (1)

Publication Number Publication Date
GB1487585A true GB1487585A (en) 1977-10-05

Family

ID=23651847

Family Applications (2)

Application Number Title Priority Date Filing Date
GB16926/77A Expired GB1487585A (en) 1973-11-19 1974-11-12 Lamp switch circuit
GB48869/74A Expired GB1487584A (en) 1973-11-19 1974-11-12 Lamp control circuit

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB48869/74A Expired GB1487584A (en) 1973-11-19 1974-11-12 Lamp control circuit

Country Status (6)

Country Link
US (1) US3904922A (en)
JP (1) JPS5084065A (en)
DE (1) DE2442198A1 (en)
FR (1) FR2251982B1 (en)
GB (2) GB1487585A (en)
NL (1) NL7414022A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119184A (en) * 1982-04-21 1983-11-09 Helvar Oy High frequency current supply method and apparatus

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723098A (en) * 1980-10-07 1988-02-02 Thomas Industries, Inc. Electronic ballast circuit for fluorescent lamps
US4477748A (en) * 1980-10-07 1984-10-16 Thomas Industries, Inc. Solid state ballast
US4873471A (en) * 1986-03-28 1989-10-10 Thomas Industries Inc. High frequency ballast for gaseous discharge lamps
DE3713312A1 (en) * 1987-04-18 1989-02-02 Manfred Prof Dipl Ing Fender Controllable AC source for gas-discharge paths for light production and ozone production
US5001386B1 (en) * 1989-12-22 1996-10-15 Lutron Electronics Co Circuit for dimming gas discharge lamps without introducing striations
US5118992A (en) * 1990-04-17 1992-06-02 North American Philips Corporation Fluorescent lamp controlling arrangement
US5173643A (en) * 1990-06-25 1992-12-22 Lutron Electronics Co., Inc. Circuit for dimming compact fluorescent lamps
US5952794A (en) * 1997-10-02 1999-09-14 Phillips Electronics North America Corportion Method of sampling an electrical lamp parameter for detecting arc instabilities
US8829412B1 (en) * 2011-04-25 2014-09-09 Dgi Creations, Llc Remote monitoring of glow tube light output including a logic unit maintaining an indication of a monitored glow tube discharge while no discharge is detected
US11004883B2 (en) * 2019-04-04 2021-05-11 Synaptics Incorporated System and method for optical sensing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3143665A (en) * 1961-04-17 1964-08-04 Rotax Ltd Silicon control rectifier switching circuit having variable delay
US3328669A (en) * 1964-09-18 1967-06-27 Engelhard Hanovia Inc Firing circuit for silicon controlled inverter circuit
US3341737A (en) * 1964-10-14 1967-09-12 Westinghouse Electric Corp Constant current supply especially for fluorescent lamps
US3700960A (en) * 1971-09-23 1972-10-24 Gen Electric Metal halide lamp system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119184A (en) * 1982-04-21 1983-11-09 Helvar Oy High frequency current supply method and apparatus
US5034660A (en) * 1982-04-21 1991-07-23 Oy Helvar Method of and apparatus for supplying high frequency alternating current to a fluorescence lamp

Also Published As

Publication number Publication date
GB1487584A (en) 1977-10-05
FR2251982A1 (en) 1975-06-13
US3904922A (en) 1975-09-09
NL7414022A (en) 1975-01-31
DE2442198A1 (en) 1975-05-22
FR2251982B1 (en) 1978-10-13
JPS5084065A (en) 1975-07-07

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed