GB1299523A - Electric system for operating a gas discharge lamp - Google Patents
Electric system for operating a gas discharge lampInfo
- Publication number
- GB1299523A GB1299523A GB8697/70A GB869770A GB1299523A GB 1299523 A GB1299523 A GB 1299523A GB 8697/70 A GB8697/70 A GB 8697/70A GB 869770 A GB869770 A GB 869770A GB 1299523 A GB1299523 A GB 1299523A
- Authority
- GB
- United Kingdom
- Prior art keywords
- triac
- lamp
- discharge lamp
- phase angle
- variable phase
- 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
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
- H05B41/36—Controlling
- H05B41/38—Controlling the intensity of light
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
- H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
- H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
1299523 Discharge lamp circuits BERKEY PHOTO Inc 24 Feb 1970 [21 April 1969] 8697/70 Heading H2H A circuit for operating a gas discharge lamp V1 comprises a triac SR1 connected in series with the lamp across an A.C. source the impedance of which forms the sole ballast, a control circuit for switching on the triac at a variable phase angle and a circuit for initially igniting the lamp at a variable phase angle corresponding to the variable phase angle at which the triac is switched. To initially ignite the lamp, a switch S1 is temporarily closed thereby charging a capacitor C2 via a resistance R7 and the source. After a time determined by the setting of a ganged resistor R8 a triac SR2 is triggered so that the capacitor C2 discharges and supplies a high voltage pulse to a transformer T1 to start the lamp. The triac SR1 is simultanously triggered and maintains the lamp on as it is switched on in each half cycle of the source voltage. The triac SR1 may be replaced by a pair of controlled rectifiers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81791269A | 1969-04-21 | 1969-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1299523A true GB1299523A (en) | 1972-12-13 |
Family
ID=25224184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8697/70A Expired GB1299523A (en) | 1969-04-21 | 1970-02-24 | Electric system for operating a gas discharge lamp |
Country Status (5)
Country | Link |
---|---|
US (1) | US3622838A (en) |
CA (1) | CA935865A (en) |
DE (1) | DE2019255A1 (en) |
FR (1) | FR2046239A5 (en) |
GB (1) | GB1299523A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5738594A (en) * | 1980-08-20 | 1982-03-03 | Ushio Electric Inc | Device for firing discharge lamp |
MX9202472A (en) * | 1991-05-31 | 1993-12-01 | Kelmas Co Sa | ELECTRONIC STARTER FOR FLUORESCENT TUBES. |
US6650070B1 (en) | 2002-07-25 | 2003-11-18 | Varon Lighting, Inc. | Point of use lighting controller |
US9916781B2 (en) * | 2012-03-02 | 2018-03-13 | Michael Shipman | Illuminated vehicular sign |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2870379A (en) * | 1958-08-13 | 1959-01-20 | Engelhard Ind Inc | Operating circuit for compact type arc lamps |
US3344311A (en) * | 1965-05-24 | 1967-09-26 | Gen Electric | Compensating control circuit |
-
1969
- 1969-04-21 US US817912A patent/US3622838A/en not_active Expired - Lifetime
-
1970
- 1970-02-24 GB GB8697/70A patent/GB1299523A/en not_active Expired
- 1970-04-03 CA CA079153A patent/CA935865A/en not_active Expired
- 1970-04-21 FR FR7014374A patent/FR2046239A5/fr not_active Expired
- 1970-04-21 DE DE19702019255 patent/DE2019255A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US3622838A (en) | 1971-11-23 |
CA935865A (en) | 1973-10-23 |
FR2046239A5 (en) | 1971-03-05 |
DE2019255A1 (en) | 1970-10-22 |
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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 |