GB554513A - Improvements in method for obtaining choice of bright or dim light from electric light circuit - Google Patents

Improvements in method for obtaining choice of bright or dim light from electric light circuit

Info

Publication number
GB554513A
GB554513A GB71242A GB71242A GB554513A GB 554513 A GB554513 A GB 554513A GB 71242 A GB71242 A GB 71242A GB 71242 A GB71242 A GB 71242A GB 554513 A GB554513 A GB 554513A
Authority
GB
United Kingdom
Prior art keywords
lamp
door
bright
choice
obtaining
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
GB71242A
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.)
HYMAN EMANUEL LAPIDUS
Original Assignee
HYMAN EMANUEL LAPIDUS
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 HYMAN EMANUEL LAPIDUS filed Critical HYMAN EMANUEL LAPIDUS
Priority to GB71242A priority Critical patent/GB554513A/en
Publication of GB554513A publication Critical patent/GB554513A/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
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/06—Switching arrangements, e.g. from series operation to parallel operation
    • 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
    • H05B41/40—Controlling the intensity of light discontinuously

Abstract

554,513. Door operating appliances. LAPIDUS, H.E. Jan. 17, 1942, No. 712. [Class 65 (i)] [Also in Group XXXV] A door operates a switch in parallel with a lamp in series with an illuminating or indicating lamp so that when the door is opened the latter lamp is dimmed. Several switches operated by different doors may be in series and in parallel with the first lamp so that the indicating lamp is fully illuminated only when all door switches are closed. A manual switch may also be in parallel with the first lamp to render the device inoperative at will.
GB71242A 1942-01-17 1942-01-17 Improvements in method for obtaining choice of bright or dim light from electric light circuit Expired GB554513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB71242A GB554513A (en) 1942-01-17 1942-01-17 Improvements in method for obtaining choice of bright or dim light from electric light circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB71242A GB554513A (en) 1942-01-17 1942-01-17 Improvements in method for obtaining choice of bright or dim light from electric light circuit

Publications (1)

Publication Number Publication Date
GB554513A true GB554513A (en) 1943-07-07

Family

ID=9709220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB71242A Expired GB554513A (en) 1942-01-17 1942-01-17 Improvements in method for obtaining choice of bright or dim light from electric light circuit

Country Status (1)

Country Link
GB (1) GB554513A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246867A (en) * 1990-07-27 1992-02-12 David Ronald Mayes Testing electric lamps

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246867A (en) * 1990-07-27 1992-02-12 David Ronald Mayes Testing electric lamps

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