Automotive ignition analyzer having large screen picture tube

Claim 1

AN IGNITION ANALYZER FOR TESTING THE IGNITION SYSTEM OF AN INTERNAL COMBUSTION ENGINE INCLUDING AN IGNITION COIL HAVING PRIMARY AND SECONDARY CIRCUITS AND A PLURALITY OF SPARK PLUGS OPERATIVELY CONNECTED THERETO, COMPRISING: (A) A MAGNETIC DEFLECTION TYPE CATHODE RAY TUBE HAVING A DEFLECTION YOKE MOUNTED THEREON COMPRISING A HORIZONTAL DEFLECTION COIL AND A VERTICAL DEFLECTION COIL, (B) MEANS ADAPTED TO GENERATE A SWEEPING SIGNAL COMPRISING A SAW-TOOTH GENERATOR, MEANS FOR DERIVING A TRIGGERING IMPULSE FROM AN ELECTRICAL LEAD OF SAID ENGINE, MEANS FOR AMPLIFYING SAID TRIGGERING IMPULSE AND APPLYING SAID AMPLIFIED IMPULSE TO ACUTATE SAID SAW-TOOTH GENERATOR FOR PRODUCING A SINGLE SWEEPING SIGNAL FOR EACH TRIGGERING IMPULSE, (C) A POWER AMPLIFIER HAVING ITS INPUT CONNECTED TO SAID SWEEPING SIGNAL GENERATING MEANS AND HAVING ITS OUTPUT OPERATIVELY CONNECTED TO ONE OF SAID DEFLECTION COILS FOR CAUSING THE BEAM OF SAID CATHODE RAY TUBE TO BE SWEPT ALONG ONE SET OF COORDINATES, (D) AN ELECTRONIC AMPLIFIER HAVING ITS INPUT ADAPTED TO BE CONNECTED ALTERNATIVELY TO THE PRIMARY OR SECONDARY OF SAID IGNITION SYSTEM AND HAVING ITS OUTPUT OPERATIVELY CONNECTED TO THE OTHER OF SAID DEFLECTION COILS, SAID AMPLIFIER HAVING WAVE SHAPING MEANS INCORPORATED THEREIN FOR CORRECTING THE DISTORTION INTRODUCED BY THE CHARACTERISTICS OF SAID DEFLECTION COILS AT THE FREQUENCIES OF OSCILLATIONS CAUSED BY AN IGNITION SPARK DISCHARGE, WHEREBY THE VISUAL TRACING PRODUCED ON THE SCREEN OF SAID CATHODE RAY TUBE IS A TRUE REPRESENTATION OF THE SIGNAL CURRENTS APPLIED TO SAID AMPLIFIER.