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
GB1197247A
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.)
HENRY WILLIAM THORNDYCRAFT
EK Cole Ltd
Original Assignee
HENRY WILLIAM THORNDYCRAFT
EK Cole 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 HENRY WILLIAM THORNDYCRAFT, EK Cole LtdfiledCriticalHENRY WILLIAM THORNDYCRAFT
Priority to GB1197247ApriorityCriticalpatent/GB623351A/en
Publication of GB623351ApublicationCriticalpatent/GB623351A/en
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
H05B41/02—Details
H05B41/04—Starting switches
H05B41/06—Starting switches thermal only
Landscapes
Thermally Actuated Switches
(AREA)
Abstract
623,351. Thermal switches. COLE, Ltd., E. K., and THORNDYCRAFT, H. W. May 3, 1947, No. 11972. [Class 38(v)] A starter-switch for a discharge lamp comprises a U-shaped bimetallic strip a encircled by a heater coil h at the bend, and carrying a contact arm g normally engaging a contact arm f carried by a second bimetallic strip d to provide ambient temperature compensation.
GB1197247A1947-05-031947-05-03Improvements in and relating to starting switches suitable for electric discharge lamps
ExpiredGB623351A
(en)
Improvements in and relating to thermal delay switches suitable for starting electric discharge lamps and for protective circuits for other electric discharge devices