GB799407A - Improvements in or relating to stage lighting control apparatus - Google Patents
Improvements in or relating to stage lighting control apparatusInfo
- Publication number
- GB799407A GB799407A GB1171/56A GB117156A GB799407A GB 799407 A GB799407 A GB 799407A GB 1171/56 A GB1171/56 A GB 1171/56A GB 117156 A GB117156 A GB 117156A GB 799407 A GB799407 A GB 799407A
- Authority
- GB
- United Kingdom
- Prior art keywords
- windings
- magnetization
- current
- control
- auxiliary
- 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
- 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
Abstract
799,407. Control systems for stage lighting. SIEMENS-SCHUCKERTWERKE AKT.-GES. Jan. 26, 1956 [Jan. 12, 1955; Nov. 5, 1955], No. 1171/56. Class 38 (4). [Also in Group XXXIX] In a stage lighting control system employing magnetic amplifiers MV1, the load windings 1, 2, of each amplifier are connected through positive feed-back windings 3, 4, and rectifiers G1 to a load L1. Negative feed-back is effected with the aid of resistor 16. The load current is supplied from an A.C. source RSTO through a transformer 20 which has the effect of maintaining a constant supply voltage for the apparatus. Windings 5, 6 are provided for auxiliary A.C. magnetization of an amplifier, these windings being connected through resistor 7 to the supply phases S, O, and it is possible to reduce the load current substantially to zero with the aid of such auxiliary magnetization of the amplifier. The resistor 7 may be replaced by an air-gap choke coil, or by a combination of chokes and resistors to provide a predetermined phase position of the auxiliary magnetization current. The auxiliary windings of a number of amplifiers may be connected in series and supplied in common. The premagnetization windings 8 are supplied from a D.C. source and are connected in series with a high resistance 10, high resistance termination of control windings 9 being effected by resistors 11 and variable resistors 12, whereby the time constants of these circuits are reduced. In. addition to the use of alternating-current auxiliary magnetization, the magnetic amplifiers have cores consisting of alloys having one or more preferred magnetic directions and constructed to avoid constriction of the flux path. Each variable resistance 12 is connected to one of three control lines joined to magnetic amplifiers MV. The amplifiers have group-setting devices 13 and a fader 14 for altering the brightness of one group of lamps. All the lamps may be disconnected in common or may undergo a common reduction in brightness by means of circuit element 15 which simultaneously controls all the amplifiers MV. In another arrangement, the auxiliary alternating-current is supplied by transformer 21 through resistors 23, the pre-magnetization windings 8 being energized through rectifier 24 and adjustable resistance 25. Individual adjustment for each amplifier may be provided by tappings in the windings 8, and by means of shunt resistors 26. The use of negative feedback for the amplifiers derived from the output voltages enables the characteristic curves connecting control current and output voltage to be substantially coincident for different loads. Positive feedback derived from the load current increases the slope of the lamp-voltage-control current characteristic when the load resistance has a low value. The member for adjusting the control magnetization of an amplifier may be coupled with means for varying the auxiliary alternating- current so that these quantities are simultaneously controlled in different senses. Special arrangements for the control and pre-magnetization windings involve the disposition of the operating winding 1 between two components of the control winding 9, and the placing of the pre-magnetizing windings 8 partly above and partly below the operating winding 1. Any reduction in the heat transfer rate due to these special arrangements is obviated by overdimensioning the amplifier, Fig. 7 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE799407X | 1955-01-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB799407A true GB799407A (en) | 1958-08-06 |
Family
ID=6711616
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1171/56A Expired GB799407A (en) | 1955-01-12 | 1956-01-12 | Improvements in or relating to stage lighting control apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB799407A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101154488B (en) * | 2006-09-28 | 2011-04-20 | 雅马哈株式会社 | Parameter setting apparatus |
-
1956
- 1956-01-12 GB GB1171/56A patent/GB799407A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101154488B (en) * | 2006-09-28 | 2011-04-20 | 雅马哈株式会社 | Parameter setting apparatus |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2561329A (en) | Electric energy control system | |
US2403393A (en) | Regulator | |
US2078880A (en) | Electric controlling apparatus | |
US2549782A (en) | Voltage regulator | |
US3241035A (en) | A.c.-d.c. regulated power supply | |
GB1509598A (en) | Voltage regulating circuits | |
GB799407A (en) | Improvements in or relating to stage lighting control apparatus | |
US3045170A (en) | Regulated rectifier | |
US2814773A (en) | Voltage regulator | |
GB966302A (en) | Power supply regulating system | |
US2495783A (en) | Load balancing system | |
US2810876A (en) | Regulated rectifier | |
US2892975A (en) | Voltage-compensated self biased magnetic amplifier | |
US2396851A (en) | Electric controlling apparatus | |
US2656500A (en) | Electronic motor control system | |
US3129375A (en) | Power supply utilizing a magnetic amplifier for d.c. control | |
US2435214A (en) | Power factor regulating apparatus | |
US3310728A (en) | Regulated a.c.-d.c. converter system | |
US1839869A (en) | Voltage regulator for radiotransmitters | |
US2380521A (en) | Electric regulating apparatus | |
US2779911A (en) | Means for reducing or nullifying the minimum output current of magnetic amplifiers | |
US1972696A (en) | Control system | |
US2831160A (en) | Negative feedback magnetic amplifier with temperature compensation | |
US2164912A (en) | Tension control device or the like | |
US2107360A (en) | Alternating current control apparatus |