GB1446422A - Electrical switching systems - Google Patents

Electrical switching systems

Info

Publication number
GB1446422A
GB1446422A GB1695476A GB1695476A GB1446422A GB 1446422 A GB1446422 A GB 1446422A GB 1695476 A GB1695476 A GB 1695476A GB 1695476 A GB1695476 A GB 1695476A GB 1446422 A GB1446422 A GB 1446422A
Authority
GB
United Kingdom
Prior art keywords
switching means
electrical switching
switching systems
royce
triac
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
GB1695476A
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.)
ROYCE THOMPSON ELECTRIC Ltd
Original Assignee
ROYCE THOMPSON ELECTRIC 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 ROYCE THOMPSON ELECTRIC Ltd filed Critical ROYCE THOMPSON ELECTRIC Ltd
Priority to GB1695476A priority Critical patent/GB1446422A/en
Priority claimed from GB2080772A external-priority patent/GB1446421A/en
Publication of GB1446422A publication Critical patent/GB1446422A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/30—Modifications for providing a predetermined threshold before switching
    • H03K17/305—Modifications for providing a predetermined threshold before switching in thyristor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
    • 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
    • H05B39/041—Controlling the light-intensity of the source
    • H05B39/044—Controlling the light-intensity of the source continuously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1446422 Street lighting control systems ROYCE THOMPSON ELECTRIC Ltd 6 Aug 1973 [4 May 1972] 16954/76 Divided out of 1446421 Heading H2H The disclosures in this Specification are substantially identical to those in the parent Specification 1,446,421 but the claims are directed towards the operation of the switching means 4 containing the transistors TR1, TR2 in response to a plurality of voltage values, derived by a photocell P in the device 7 whereby the switching means 4 is operative to close and/or open the output circuit of the diode bridge 3 whereby a gating signal for a triac T is controlled to switch the load, comprising a street lamp, ON and OFF, according to the ambient light conditions.
GB1695476A 1972-05-04 1972-05-04 Electrical switching systems Expired GB1446422A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1695476A GB1446422A (en) 1972-05-04 1972-05-04 Electrical switching systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1695476A GB1446422A (en) 1972-05-04 1972-05-04 Electrical switching systems
GB2080772A GB1446421A (en) 1972-05-04 1972-05-04 Electrical switching systems

Publications (1)

Publication Number Publication Date
GB1446422A true GB1446422A (en) 1976-08-18

Family

ID=26252336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1695476A Expired GB1446422A (en) 1972-05-04 1972-05-04 Electrical switching systems

Country Status (1)

Country Link
GB (1) GB1446422A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3026195A1 (en) * 1979-07-14 1981-01-29 Matsushita Electric Works Ltd Automatic lighting control circuit - has SCR to triac switching with time constant light detector control to avoid false operation
DE3008340A1 (en) * 1980-03-05 1981-09-17 Micheel, Ewald, 4450 Lingen Daylight actuated light switch control circuit - has triac and delay device between two comparators, with one comparator connected to switch at other comparator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3026195A1 (en) * 1979-07-14 1981-01-29 Matsushita Electric Works Ltd Automatic lighting control circuit - has SCR to triac switching with time constant light detector control to avoid false operation
DE3008340A1 (en) * 1980-03-05 1981-09-17 Micheel, Ewald, 4450 Lingen Daylight actuated light switch control circuit - has triac and delay device between two comparators, with one comparator connected to switch at other comparator

Similar Documents

Publication Publication Date Title
GB1360575A (en) Solid state relay
SE8203601L (en) POWER CONTROLLER, IN PARTICULAR A LIGHT CONTROLLER
GB1497817A (en) Discharge lamp lighting device
GB1408763A (en) Lamp failure sensing mechaism for navigational light
GB1455520A (en) Photocontrol system for electric lamps
ATE98067T1 (en) DC CONTROLLER.
US5136213A (en) Motion detecting light controller system
GB1410672A (en) Control circuit for thyristors
GB1455213A (en) Electric isolation device
EP0271959A3 (en) High voltage power transistor circuits
GB1446422A (en) Electrical switching systems
GB1424802A (en) Series circuit control systems
GB1473785A (en) Light-responsive electric switch
US4293796A (en) Traffic light dimming technique and circuitry
GB1446421A (en) Electrical switching systems
US3492529A (en) Daylight control circuit
KR930006538Y1 (en) Light control circuit of traffic signal controller
SU522510A2 (en) Device to turn on the light
ES395936A1 (en) Electric control circuit for a textile machine
NO852083L (en) DEVICE FOR ACTIVATION OF RELAYS.
SU438112A1 (en) Switching transistors
SU1068969A1 (en) Light switch
SU391711A1 (en)
GB1312333A (en) Bistable control amplifier device
SU1624554A1 (en) Switching device

Legal Events

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