GB412844A - Improvements in or relating to electric control systems for alternating current projection-arcs - Google Patents
Improvements in or relating to electric control systems for alternating current projection-arcsInfo
- Publication number
- GB412844A GB412844A GB3274433A GB3274433A GB412844A GB 412844 A GB412844 A GB 412844A GB 3274433 A GB3274433 A GB 3274433A GB 3274433 A GB3274433 A GB 3274433A GB 412844 A GB412844 A GB 412844A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- arc
- motor
- current
- rectifier
- 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
- H05B31/00—Electric arc lamps
- H05B31/0081—Controlling of arc lamps
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
412,844. Arc lamps. PARFITT, A. W., Stafford House, Norfolk Street, Strand, London.-(Tappan, C. ; 420, West End Avenue, New York, U.S.A.) Nov. 23, 1933, No. 32744. [Class 39 (i).] Relates to a control arrangement for an A.C. arc in which the electrodes 10, 11 are adjusted by means of a motor M under the control of a relay. The arc is fed from the secondary winding 7 of a transformer T having a high leakage reactance, an additional secondary winding 8 supplying the motor M and a relay R through a rectifier C. When the arc current falls off, due to the leakage reactance, the voltage across the winding 8 increases and the current through the relay R rises to a value sufficient to operate the relay and cause adjustment of the electrodes by the motor M. In a modification, a clockwork motor is used, in which case the relay R operates a brake. In another modification, the rectifier C is supplied from a current transformer connected in the supply to the arc. In this case reduction of current in the rectifier circuit causes actuation of the relay to complete the motor circuit. The primary of the current transformer may be shunted by a resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3274433A GB412844A (en) | 1933-11-23 | 1933-11-23 | Improvements in or relating to electric control systems for alternating current projection-arcs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3274433A GB412844A (en) | 1933-11-23 | 1933-11-23 | Improvements in or relating to electric control systems for alternating current projection-arcs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB412844A true GB412844A (en) | 1934-07-05 |
Family
ID=10343361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3274433A Expired GB412844A (en) | 1933-11-23 | 1933-11-23 | Improvements in or relating to electric control systems for alternating current projection-arcs |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB412844A (en) |
-
1933
- 1933-11-23 GB GB3274433A patent/GB412844A/en not_active Expired
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