GB850588A - Lamp control circuit - Google Patents

Lamp control circuit

Info

Publication number
GB850588A
GB850588A GB36895/56A GB3689556A GB850588A GB 850588 A GB850588 A GB 850588A GB 36895/56 A GB36895/56 A GB 36895/56A GB 3689556 A GB3689556 A GB 3689556A GB 850588 A GB850588 A GB 850588A
Authority
GB
United Kingdom
Prior art keywords
lamp
film
light
thyratron
transformer
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
GB36895/56A
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.)
AC Nielsen Co Ltd
Original Assignee
AC Nielsen Co Ltd
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 AC Nielsen Co Ltd filed Critical AC Nielsen Co Ltd
Publication of GB850588A publication Critical patent/GB850588A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/12—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers
    • G05B19/124—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using record carriers using tapes, cards or discs with optically sensed marks or codes
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/23—Pc programming
    • G05B2219/23421—Record program on tape, disk, memory

Abstract

850,588. Switching control for incandescent lamps. NIELSEN CO. Ltd., A. C. Dec. 3, 1956 [Dec. 22, 1955], No. 36895/56. Class 38 (4). An apparatus comprising a light-sensitive member such as a film has the member subjected to the light radiated from an electric lamp, the current flowing through the lamp being alternately switched from a value which is insufficient to cause the lamp radiation to affect the light-sensitive member to a value which causes the lamp to radiate to affect the member. A blue-violet sensitive photographic film 23 on which it is desired to record a succession of discrete marks is subjected to the light radiated from an incandescent lamp 21. The lamp 21 is supplied from an alternating current source 18, 19 by way of a voltage regulator 16 and the primary winding 13 of a transformer 12. An adjustable resistor 32 is provided to adjust the current flowing in the lamp-when a thyratron 25 is non-conductive-to a low value so that the filament of the lamp 21 is only warmed to a degree whereby the light emitted from the lamp is mainly in the " red " sector of the spectrum and consequently does not expose the film 23. When it is desired to expose the film a suitable voltage is fed from the source 43 to the controlgrid 25a of the thyratron 25 whereby to render it conducting such that the impedance of the secondary winding 14 of the transformer 12 is reduced. The secondary impedance reflected in the primary side of the transformer is therefore reduced so that a larger current flows through the lamp 21 so that the light emitted therefrom will expose the film 23. Thus the life of the lamp 21 is lengthened as against continual switching ON and OFF. In other embodiments conduction of the thyratron may be arranged to affect the saturation of a saturable reaction; may be arranged to superimpose a voltage on an existing voltage or may be arranged to operate a relay whereby the energization of the lamp is varied. Specifications 819,524 and 823,361 are referred to.
GB36895/56A 1955-12-22 1956-12-03 Lamp control circuit Expired GB850588A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US850588XA 1955-12-22 1955-12-22

Publications (1)

Publication Number Publication Date
GB850588A true GB850588A (en) 1960-10-05

Family

ID=22189196

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36895/56A Expired GB850588A (en) 1955-12-22 1956-12-03 Lamp control circuit

Country Status (1)

Country Link
GB (1) GB850588A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219896A (en) * 1988-06-14 1989-12-20 Bosch Gmbh Robert Operating incandescent light bulbs to prevent surge currents

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219896A (en) * 1988-06-14 1989-12-20 Bosch Gmbh Robert Operating incandescent light bulbs to prevent surge currents

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