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GB1501213A - Pulsed metal or metal halide lamps for photocopying applications - Google Patents

Pulsed metal or metal halide lamps for photocopying applications

Info

Publication number
GB1501213A
GB1501213A GB16835/75A GB1683575A GB1501213A GB 1501213 A GB1501213 A GB 1501213A GB 16835/75 A GB16835/75 A GB 16835/75A GB 1683575 A GB1683575 A GB 1683575A GB 1501213 A GB1501213 A GB 1501213A
Authority
GB
United Kingdom
Prior art keywords
lamp
metal
capacitor
source
pulsed
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
GB16835/75A
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 GB1501213A publication Critical patent/GB1501213A/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
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • 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)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

1501213 Pulsed operation of gas discharge lamps XEROX CORP 23 April 1975 [6 May 1974] 16835/75 Heading H2H [Also in Division G2] A sodium vapour gas discharge lamp 1 is operable from a D.C. source 15 in an intermittent mode for the purpose of photocopying a document 18. Closure of a switch 17 causes a capacitor 16 to be charged from the battery 15 to a voltage which may, of itself, be sufficient to effect a discharge through the lamp 1. In addition a circuit for triggering the lamp when the capacitor 16 is charged to a voltage below the breakdown value of the lamp 1 is provided comprising a winding 21 placed around the lamp 1 to which is applied a pulse from a source 20 to trigger the lamp when desired thus allowing the capacitor 16 to discharge through the lamp. A voltage source 22 is provided whereby the winding 21 may be used to heat the lamp 1 to cause vaporization of the sodium in the lamp.
GB16835/75A 1974-05-06 1975-04-23 Pulsed metal or metal halide lamps for photocopying applications Expired GB1501213A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US467343A US3914649A (en) 1974-05-06 1974-05-06 Pulsed metal or metal halide lamps for photocopying applications

Publications (1)

Publication Number Publication Date
GB1501213A true GB1501213A (en) 1978-02-15

Family

ID=23855305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16835/75A Expired GB1501213A (en) 1974-05-06 1975-04-23 Pulsed metal or metal halide lamps for photocopying applications

Country Status (3)

Country Link
US (1) US3914649A (en)
CA (1) CA1063161A (en)
GB (1) GB1501213A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2657824C2 (en) * 1976-01-16 1983-08-04 General Electric Co., Schenectady, N.Y. Method for operating a high-pressure metal halide lamp and device for carrying out the method
US4140385A (en) * 1976-03-22 1979-02-20 Xerox Corporation Low pressure metal or metal halide lamps for photocopying applications
US4101807A (en) * 1976-03-22 1978-07-18 Xerox Corporation Method and apparatus for controlling the temperature of low pressure metal or metal halide lamps
FR2466935A1 (en) * 1979-10-05 1981-04-10 Oce Photosia Sa Fluorescent lamp control for reprographic machine - maintains lamps at half power between copies to increase lamp life and light output intensity
DE3716694A1 (en) * 1987-05-19 1988-12-01 Theimer Gmbh Siegfried METHOD FOR OPERATING AN EXPOSURE DEVICE IN REPROGRAFIC TECHNOLOGY AND EXPOSURE DEVICE FOR CARRYING OUT THIS METHOD
US4884009A (en) * 1987-12-18 1989-11-28 Gte Products Corporation Color selectable source for pulsed arc discharge lamps

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1232423A (en) * 1967-07-13 1971-05-19
US3596237A (en) * 1969-06-18 1971-07-27 Grimes Manufacturing Co Stroboscopic anti-collision beacon
US3619716A (en) * 1969-07-23 1971-11-09 Lutron Electronics Co High-frequency fluorescent tube lighting circuit and ac driving circuit therefor

Also Published As

Publication number Publication date
CA1063161A (en) 1979-09-25
US3914649A (en) 1975-10-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee