GB1440319A - Dimmer controls for lamps - Google Patents

Dimmer controls for lamps

Info

Publication number
GB1440319A
GB1440319A GB5873672A GB5873672A GB1440319A GB 1440319 A GB1440319 A GB 1440319A GB 5873672 A GB5873672 A GB 5873672A GB 5873672 A GB5873672 A GB 5873672A GB 1440319 A GB1440319 A GB 1440319A
Authority
GB
United Kingdom
Prior art keywords
lamp
dimmer
lamps
transistor
linear
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
GB5873672A
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.)
AB Electronic Components Ltd
Original Assignee
AB Electronic Components 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 AB Electronic Components Ltd filed Critical AB Electronic Components Ltd
Priority to GB5873672A priority Critical patent/GB1440319A/en
Publication of GB1440319A publication Critical patent/GB1440319A/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

Landscapes

  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1440319 Lamp with dimmer AB ELECTRONIC COMPONENTS Ltd 2 Jan 1974 [20 Dec 1972] 58736/72 Heading H2H A D.C. lamp with dimmer control comprises a transistor T in series with the lamp(s) L and a low voltage variable resistor B controlling the transistor base voltage. The resistor may be carbon on ceramic, cermet, made by printed circuit techniques or wirewound and may be non-linear so that the variation of light output with slider travel is approximately linear.
GB5873672A 1972-12-20 1972-12-20 Dimmer controls for lamps Expired GB1440319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5873672A GB1440319A (en) 1972-12-20 1972-12-20 Dimmer controls for lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5873672A GB1440319A (en) 1972-12-20 1972-12-20 Dimmer controls for lamps

Publications (1)

Publication Number Publication Date
GB1440319A true GB1440319A (en) 1976-06-23

Family

ID=10482305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5873672A Expired GB1440319A (en) 1972-12-20 1972-12-20 Dimmer controls for lamps

Country Status (1)

Country Link
GB (1) GB1440319A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982001974A1 (en) * 1980-12-05 1982-06-10 Co Boeing Light dimmer system for grounded-side control of discrete indicator lights
FR2537802A1 (en) * 1982-12-09 1984-06-15 Trw Canada Ltd ELECTRONIC CONTINUOUS HEATING CONTROL DEVICE
DE3708024A1 (en) * 1986-03-13 1987-09-17 Lutron Electronics Co LIGHTING CONTROL SYSTEM

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982001974A1 (en) * 1980-12-05 1982-06-10 Co Boeing Light dimmer system for grounded-side control of discrete indicator lights
US4358714A (en) * 1980-12-05 1982-11-09 Boeing Vertol Company Light dimming system for grounded-side control of discrete indicator lamps
DE3152569C2 (en) * 1980-12-05 1990-03-29 Boeing Co
FR2537802A1 (en) * 1982-12-09 1984-06-15 Trw Canada Ltd ELECTRONIC CONTINUOUS HEATING CONTROL DEVICE
GB2133643A (en) * 1982-12-09 1984-07-25 Trw Canada Ltd Power controller
DE3708024A1 (en) * 1986-03-13 1987-09-17 Lutron Electronics Co LIGHTING CONTROL SYSTEM

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee