Matches 1 - 45 out of 45


Match Document Document Title
5657117 Device for examining optical waveguides  
A device for examining optical waveguides comprises a prism to be positioned on the waveguide to be investigated, an entering point at which incoming light enters the device, and control devices...
3725730 FLICKERLESS THREE-PHASE LIGHTING DEVICE FOR ELECTRIC DISCHARGE LAMPS  
The invention concerns a flickerless discharge lamp lighting device which utilizes a three-phase to two-phase converter capable of converting three-phase current into a two-phase current with a...
3453548 CIRCUIT FOR CONVERTING THREE-PHASE POTENTIALS INTO TWO-PHASE POTENTIALS  
3391333 Resistance network for arc welders  
3239716 Safety circuit for sequence start ballast with disconnect switches in the primary and secondary windings  
3172006 Collector circuit for electron beam devices  
3132285 Transformer ballast assembly for energizing gas discharge devices  
3116438 High frequency lighting systems and ballast circuits therefor  
3112428 Apparatus for igniting and operating gaseous discharge devices  
3112427 Supply circuit for a pair of hot cathode fluorescent discharge lamps  
3102971 Electric impulse generating system for spectral analysis with controlled arc  
3072826 Plural discharge lamp circuit and laminated core transformer therefor and method of making said transformer  
3059143 Ballast for discharge devices  
3040208 Ballast apparatus for gaseous discharge devices  
3020448 Electric disintegration of conductive materials  
3018410 Circuit arrangement for energizing load apparatus  
2996644 Fluorescent tube lighting system  
2987650 Gaseous discharge lamp circuit  
2930997 Magnetic core construction  
2923856 High frequency ballast unit  
2918605 Starting and operating fluorescent lamps in series  
2911581 Three phase to single phase welding method and machine  
2909647 Wide range power supply system for welding equipment  
2900577 Ballast and lighting system for fluorescent lamps  
2885597 Ballasts for gaseous discharge lamps  
2878421 Ballast apparatus  
2877382 Apparatus for operating gaseous discharge devices  
2874332 Circuit for starting and operating multiple electric discharge lamp  
2870378 Apparatus for starting and operating gaseous discharge devices  
2858479 Alternating current power supply apparatus  
2853653 Sequence boost circuit for discharge lamps  
2849656 Switch-start discharge lamp circuit  
2838714 Igniting and operating circuit for discharge tubes  
2832008 Circuit for starting and operating gaseous discharge devices  
2829311 Low-pressure arc discharge tube arrangement  
2824263 Ballast transformer  
2821663 Electronic timer and power regulator for three phase seam welder  
2818533 Electrical circuits employing discharge tubes  
2806981 Two lamp type high power factor fluorescent lamp device  
2800571 Constant voltage power supply system for welding equipment  
2797366 Apparatus for operating gaseous discharge devices  
2796554 Electrical transformer ballast  
2789252 Auxiliary apparatus for energizing an electric discharge tube  
2786967 Thyratron control circuit  
2786966 Thyratron control circuit  
Matches 1 - 45 out of 45